Phoenix's most innovative master-planned community — grid streets, front porches, walkable pocket parks, and a direct pedestrian link to shopping. 10 minutes from TSMC Fab 21.
The valley's most thoughtfully designed master-planned community — where New Urbanism principles transform how Phoenix neighborhoods feel and function.
Union Park at Norterra is a master-planned residential community located in north Phoenix, Arizona (ZIP code 85085), bounded by Happy Valley Road to the south, Interstate 17 to the west, Norterra Parkway to the east, and the Sonoran Desert Preserve to the north. Built between 2016 and 2024 by a consortium of five major national homebuilders — Pulte Homes, Shea Homes, Taylor Morrison, TRI Pointe Homes, and Woodside Homes — Union Park represents a deliberate departure from the conventional Phoenix suburb model. When fully built out, the community encompasses approximately 4,000+ single-family homes spread across multiple distinct phases and neighborhoods, each with its own character but all united by a master design philosophy rooted in New Urbanism.
The land itself was originally held by the City of Phoenix and sold for residential development as part of a broader plan to bring high-quality, high-density (relative to Phoenix standards) residential development to the rapidly growing north Phoenix corridor. The site selection proved prescient: the Happy Valley Road corridor connecting to I-17 and Loop 101 has become one of the valley's most desirable addresses, anchored by the Norterra commercial district, a cluster of medical facilities, and — since 2022 — the announcement and active construction of TSMC's Fab 21 semiconductor manufacturing complex just minutes north via I-17.
Homes in Union Park range from approximately 1,700 square feet in the entry-tier Woodside phases to over 4,200 square feet in Shea's premium offerings. Prices as of 2025 span from roughly $520,000 to $950,000, with the median sale price landing at $658,000. The community's five-year appreciation of approximately 52% since 2020 stands among the highest in the Phoenix metro area, driven by persistent demand from both local buyers seeking the unique New Urbanism lifestyle and a substantial wave of TSMC-related relocations from California, Taiwan, and other major tech corridors.
Union Park's master homeowner association — the Union Park Community Association — maintains the community's extensive amenity portfolio, which includes three resort-style heated pools, two fully equipped fitness centers, more than eight miles of connected trails and paseos, nine or more pocket parks distributed throughout the neighborhood grid, a dedicated dog park (Bark Park), a community event pavilion, and a community garden. HOA assessments range from $155 to $210 per month for the master association, with some phases carrying an additional sub-HOA assessment on top of that for phase-specific amenities and common areas.
The community's location places it within the Deer Valley Unified School District, which is widely regarded as one of the best large school districts in Arizona, earning A-ratings at the high school level and strong marks at elementary and middle school levels. Residents are within 10 to 12 minutes of TSMC Fab 21 via I-17, 8 minutes from HonorHealth Deer Valley Medical Center, 20 minutes from downtown Scottsdale, and approximately 30 minutes from downtown Phoenix via I-17. The Norterra commercial district — anchored by a Target, an AMC 8-screen movie theater, and a diverse collection of restaurants and service businesses — is accessible from most parts of Union Park via a dedicated pedestrian path, making it the rare Phoenix community where running an errand does not require getting in a car.
CFD Notice: Most parcels in Union Park at Norterra are subject to an ARS Title 48 Community Facilities District (CFD) assessment of $600–$1,200/year, assessed separately from standard property taxes. Always confirm the specific CFD amount for any parcel before making an offer. This is a material cost that affects total housing expense and investment analysis.
Union Park sits at one of north Phoenix's most strategic intersections of freeway access, natural beauty, and commercial infrastructure. The northern edge of the community literally abuts the Sonoran Desert Preserve, giving many homes views of undisturbed desert landscape and direct access to hiking and trail networks. The western boundary runs along I-17, providing immediate access to the entire Phoenix metro — downtown in 30 minutes, Sky Harbor Airport in 35 minutes, Scottsdale Fashion Square in 25 minutes. The Norterra Parkway corridor to the east leads directly into the Norterra commercial center and then connects to Happy Valley Road, which provides east-west access across the entire north Phoenix valley to Loop 101.
The ZIP code 85085 — which Union Park shares with adjacent communities including parts of Norterra proper, portions of Happy Valley, and some of the newer developments pushing north toward Anthem — has emerged as one of the most sought-after ZIP codes in the Phoenix metro. Population in this corridor has grown at some of the fastest rates in the entire valley over the past decade, driven by quality school districts, newer housing stock, relatively affordable land (compared to Scottsdale to the east), and the ongoing build-out of commercial, medical, and employment infrastructure. The addition of TSMC and related semiconductor industry employment has accelerated this growth significantly since 2022.
The design principles that make Union Park unlike any other community in the Phoenix Valley.
If you drive through most Phoenix master-planned communities — even the nicest ones — the visual experience is similar: wide curving streets, homes set back behind expansive driveways, and garage doors dominating every house's facade. You might see a neighbor occasionally at the mailbox or while retrieving their trash cans, but the design of the streets themselves discourages casual human interaction. Front yards are generous but rarely used. The car is king, and the street is its domain.
Union Park at Norterra was designed explicitly to reject this model. The developers and city planners who shaped the project drew from the principles of New Urbanism — a movement in urban design that has been influential in creating walkable, livable communities across the United States since the 1980s. New Urbanism champions traditional neighborhood design (TND): the kind of street pattern, home placement, and public space distribution that characterized American towns before the automobile reshuffled our priorities. Union Park is one of the purest and most successful implementations of these ideas in the Phoenix metro area.
The most fundamental design decision at Union Park was to replace the standard Phoenix curvilinear street maze with a traditional grid. In a cul-de-sac suburb, streets wind and loop back on themselves, creating dead ends, maximizing the number of cul-de-sacs (which were historically marketed as safer, quieter, and more private), and effectively ensuring that the only way to get anywhere is to drive to a collector road and then out of the neighborhood. In a grid, every block connects to the next. You can walk north, south, east, or west without backtracking. Paths are shorter, connections are more numerous, and the entire neighborhood becomes navigable by foot or bicycle.
At Union Park, this grid creates a sense of interconnection that residents describe as fundamentally different from their previous suburban experiences. Children can ride bikes from their front door to a pocket park, then to a friend's house in the next block, then to another park, all without crossing a major road or encountering a cul-de-sac dead end. Adults can walk to the community pool, the fitness center, the trail network, and even to the Norterra shopping center along dedicated pedestrian paths, all within the framework of the grid. The grid is not merely a visual choice — it is a functional infrastructure decision that enables an entirely different daily lifestyle.
Perhaps the most immediately visible difference at Union Park is what you don't see: garage doors. In most phases of Union Park, garages are accessed from alleys that run behind the homes, not from the street in front. This single design choice transforms the streetscape completely. Where a conventional Phoenix street might present a solid wall of three-car garage doors interrupted occasionally by a front door, Union Park's streets present homes with actual facades — front porches, landscaped front yards, windows at street level, and doors that face the neighborhood.
The front porch, in particular, functions as the community's primary social technology. When a porch faces the street and is set close to the sidewalk — as most Union Park homes are, with relatively shallow front setbacks compared to conventional tract homes — it creates a semi-public space where residents can sit in the evening and naturally interact with neighbors walking by. This is not accidental: it is a specific design intention borrowed from traditional American neighborhoods of the early 20th century, when front porch culture was a cornerstone of community life. Residents of Union Park consistently report meeting more of their neighbors and forming more genuine community connections than they experienced in previous suburban homes, and the design is a significant reason why.
Union Park's master plan includes nine or more pocket parks distributed throughout the neighborhood grid, positioned so that no home is more than two or three blocks from a small green space. These are not the massive, programmed athletic parks typical of Phoenix master-planned communities. They are intimate neighborhood spaces — a half-acre or so, with shade trees, benches, a small playground structure, and perhaps a splash feature or a small lawn — designed to serve immediate neighbors rather than the entire community. Their scale is deliberately human, designed to encourage spontaneous use: a parent bringing a toddler out for an hour in the late afternoon, a dog-walker pausing to let their pet explore the grass, a group of teenagers claiming a picnic table after school.
The pocket park network connects directly to the community's broader trail and paseo system, creating a hierarchy of green spaces that moves from the intimate (pocket park, front porch, front yard) to the communal (paseos, major parks, trail network) to the regional (Sonoran Desert Preserve access at the northern boundary). This spatial hierarchy — again borrowed directly from New Urbanism theory — is what creates genuine neighborhood character as opposed to the amenity-as-marketing-checkbox approach that many master-planned communities take.
Connecting the pocket parks, pools, fitness centers, and trail access points is Union Park's network of paseos — dedicated pedestrian pathways that cut through the block structure of the grid, providing diagonal connections that make walking even more efficient than the street grid alone would allow. These pathways are landscaped, shaded where possible, and maintained by the master HOA. They function as the community's pedestrian highway system, and they are one of the features most frequently cited by residents when asked what they love most about Union Park.
The paseo network culminates in a dedicated pedestrian connection to the Norterra commercial district. This path — a combination of sidewalk, landscaped pathway, and a pedestrian bridge or enhanced crossing at the community boundary — allows Union Park residents to walk or ride bikes to Target, the AMC movie theater, a variety of restaurants, a UPS Store, a Sport Clips, and other services without getting in a car. In Phoenix, a city built almost exclusively around the automobile, this is genuinely unusual. The connection to Norterra is one of Union Park's most distinctive selling points, and it is something that almost no other master-planned community in the valley can offer.
Union Park's HOA CC&Rs include specific architectural diversity requirements that prevent the visual monotony common in tract home developments. No two adjacent homes may have the same elevation (architectural facade style) and the same color scheme. The approved architectural styles at Union Park span Craftsman, Farmhouse, Modern Prairie, Spanish Colonial, and Contemporary, and each builder has developed multiple elevation options within each style to ensure variety. Walking down a Union Park street, you encounter genuine visual interest — a Craftsman bungalow next to a Modern Prairie, next to a Spanish Colonial, next to a Farmhouse — rather than the endless repetition of a single model repeated down the block.
The commitment to architectural quality is reinforced by HOA design review requirements: modifications to the exterior of homes, including paint colors, additional structures, landscaping changes visible from the street, and all additions, must receive HOA approval. This protects property values and maintains the intentional visual character of the community, but it also requires buyers to factor HOA review timelines into any renovation or improvement plans.
All primary streets within Union Park include dedicated bike lanes, reinforcing the community's multimodal transportation philosophy. For residents who want to cycle — whether to the pocket parks, the pools, the trail system, or the Norterra shopping connection — the infrastructure is in place. The bike lane network also connects to the broader north Phoenix bike infrastructure, including routes along Happy Valley Road and northward toward the Sonoran Preserve trail access points.
Most homes built by Pulte Homes and Taylor Morrison in 2020 and later include roughed-in conduit for EV charging in the garage, making Level 2 charger installation a straightforward and relatively low-cost upgrade. Many homes also include solar-ready conduit as standard, a particularly valuable feature given Arizona's exceptional solar resource — Phoenix averages over 300 days of sunshine per year, and rooftop solar installations typically deliver excellent return on investment in the AZ climate. Energy efficiency features across all builders include Energy Star certification, spray foam insulation in attics and exterior walls, tankless water heaters, and low-emissivity (Low-E) windows. These features collectively reduce utility costs significantly compared to older Phoenix housing stock, a meaningful advantage given Arizona summer electricity bills.
Traditional grid pattern creates true walkability and connectivity. Every block connects — no dead ends, no maze of curving cul-de-sacs.
Garages accessed from rear alleys mean garage doors never dominate the streetscape. Front porches face neighbors, not driveways.
Small neighborhood parks every 2–3 blocks. Children can reach green space by bike without crossing a major road.
Dedicated pedestrian path connects Union Park to Target, AMC theaters, and restaurants — rare true walkability in Phoenix.
All primary internal streets include dedicated bike lanes. Phoenix's most cycling-friendly master-planned community.
Most 2020+ builds include roughed-in EV conduit and solar-ready infrastructure. Energy Star certified throughout.
"Union Park doesn't feel like most Phoenix neighborhoods. You actually see your neighbors. The kids play outside. We walk to Norterra on Friday nights. It's the community we were looking for, and we didn't think it existed in Phoenix."
The semiconductor industry's arrival in north Phoenix has fundamentally reshaped buyer demand at Union Park.
The January 2022 announcement that TSMC — Taiwan Semiconductor Manufacturing Company, the world's largest and most advanced contract chip maker — was expanding its Fab 21 facility in the Deer Valley corridor of north Phoenix from a $12 billion to a $65 billion investment fundamentally altered the residential real estate calculus in Union Park at Norterra. What had already been a popular community with strong demand from local Phoenix families became, almost overnight, the primary relocation destination for one of the highest-income cohorts of new residents in the valley's history.
TSMC Fab 21 is located approximately 8 to 12 minutes north of Union Park via I-17, making it one of the shortest commutes of any established master-planned community in the entire Phoenix metro to the fab site. Residents leave Union Park, merge onto I-17 northbound, and exit at Deer Valley Road or Scottsdale Road — a drive that at most commute hours takes 10 to 12 minutes door to door. This commute time advantage is significant: many competing communities in Gilbert, Chandler, or even Peoria require 25 to 45 minutes to reach the fab, and in Phoenix's increasingly congested freeway environment, that difference materially affects quality of life.
TSMC's workforce at Fab 21 spans a wide range of roles and compensation levels. Process engineers and design engineers at the senior and principal level — responsible for developing and optimizing the cutting-edge 4nm, 3nm, and eventually 2nm manufacturing processes at the facility — earn between $150,000 and $250,000 or more in total compensation. Mid-level engineers typically earn $120,000 to $160,000. Technician and operator roles — highly skilled positions that manage the semiconductor manufacturing equipment and processes — earn $65,000 to $110,000. TSMC provides relocation packages for most hires, particularly those coming from TSMC's headquarters operations in Hsinchu, Taiwan, or from other TSMC facilities in the United States.
The relocation wave from Taiwan has been particularly significant for Union Park and the broader 85085 ZIP code. TSMC has actively transferred hundreds of Taiwanese engineers and their families to Arizona, and a substantial Taiwanese and Chinese-American community has formed in the north Phoenix corridor. This community has established itself in Union Park more densely than almost anywhere else in the valley, creating cultural infrastructure — including restaurants, grocery options, language programs, and community organizations — that is attractive to subsequent relocators from the same background. For many TSMC employees and their families, Union Park offers not just a short commute but a community where they will encounter cultural familiarity alongside the amenities and quality of life that Arizona offers.
Beyond direct TSMC employees, the fab's $65 billion investment has attracted a substantial secondary and tertiary workforce. Construction contractors, equipment suppliers, specialty chemical and gas suppliers, logistics companies, professional services firms (legal, accounting, HR), and medical practices serving the new workforce have all established or expanded operations in the north Phoenix corridor. These secondary employers are themselves high-paying — many of the roles supporting semiconductor manufacturing and its supply chain are skilled technical and professional positions — and their employees are also buying homes in Union Park. A rough estimate from valley real estate analysts in 2024 suggested that TSMC-related employment (direct plus indirect) was responsible for between 30% and 45% of Union Park home purchases in that year.
TSMC is the most dramatic recent development in north Phoenix's emerging technology corridor, but it is not the only one. Intel has operated substantial semiconductor manufacturing facilities in Chandler, Arizona for decades, and its Fab 52 and Fab 62 — representing a $20 billion investment — employ over 12,000 people at the SR-202 corridor in Chandler. While Chandler Intel employees have historically concentrated in the east valley's Gilbert, Chandler, and Queen Creek areas, the growing salience of the entire Arizona semiconductor story has attracted Intel employees and their peers to evaluate Union Park as well. The commute from Union Park to Chandler Intel facilities runs approximately 45 to 55 minutes — longer than ideal, but still within the range many tech workers accept for a home they love in a community they value.
The Arizona technology corridor story extends beyond semiconductors. USAA operates a major regional operations center approximately 15 minutes from Union Park with roughly 10,000 employees. HonorHealth Deer Valley Medical Center — a major employer in the medical sector — is 8 minutes away. Charles Schwab operates its headquarters in Westlake, Texas, but has a substantial Phoenix presence that continues to grow. Arizona State University, with its rapidly expanding research enterprise and numerous technology commercialization partnerships, draws knowledge-economy workers to the entire north Phoenix metro. The aggregate effect of these employment anchors has been to establish the north Phoenix corridor as Arizona's most dynamic knowledge-economy employment cluster, and Union Park sits at the center of it.
The TSMC relocation wave has introduced Phoenix's residential real estate market to a buyer cohort with substantially higher incomes than the typical Phoenix purchaser. An TSMC senior engineer earning $175,000 to $200,000, often with a spouse also employed in a high-skill role, brings household income that comfortably supports a $650,000 to $850,000 home purchase in a market where Maricopa County property taxes run approximately 1.3% of assessed value, HOA assessments add $155 to $210 per month, and CFD assessments add another $50 to $100 per month. For many of these buyers, Phoenix represents a dramatic improvement in housing affordability compared to the Bay Area, Seattle, or Hsinchu — markets where an equivalent home might cost $1.5 million to $3 million or more. The relief in housing cost, combined with Arizona's 2.5% flat income tax, zero estate tax, and Social Security exemption, makes the financial case for Arizona residency compelling for this buyer cohort.
The sustained presence of high-income buyers from the tech sector has created a pricing floor in Union Park that has proven resilient to the interest rate increases of 2022 and 2023 that cooled many other Phoenix submarkets. While some Phoenix neighborhoods saw price corrections of 10% to 15% in 2022 and 2023, Union Park held value better than almost any comparable community, driven by persistent demand from TSMC-related buyers who were less price-sensitive than the median Arizona homebuyer and who faced a near-total absence of equivalent communities with the combination of design quality, commute access, and lifestyle amenities that Union Park offers.
The TSMC workforce wave has also created strong short-term rental demand in Union Park. Contractors, consultants, and temporary workers associated with the fab's construction and commissioning phases — often staying in Arizona for 90 days to 12 months at a time — have created robust demand for furnished short-term rentals. Arizona state law (ARS §9-500.39) preempts local municipalities from banning short-term rentals outright, and Union Park's HOA CC&Rs do not appear to contain a blanket STR prohibition (though this should be verified on a phase-by-phase basis with the specific sub-HOA). Airbnb and VRBO listings in Union Park have generally achieved high occupancy rates, with a 4-bedroom home typically earning $2,400 to $3,800 per month in the current market. This STR opportunity has attracted a subset of investors to Union Park specifically targeting the TSMC contractor rental market.
Five builders, five different experiences. What you need to know about each before making an offer.
Union Park at Norterra was developed by five national homebuilders across multiple phases spanning 2016 through 2024. While all builders operated within the master community's New Urbanism design framework — meaning all must conform to the grid street pattern, alley garage requirements, architectural diversity standards, and paseo network — there are meaningful differences in construction quality, floor plan design, lot sizes, warranty programs, and overall buyer experience that a prospective purchaser should understand before focusing their search.
New construction is now substantially complete at Union Park — the community has been built out to near-capacity across virtually all phases, and the market has transitioned from a new construction market to a resale market. This means buyers are evaluating existing homes rather than ordering new ones, and the differences between builders show up in the quality of finishes, the durability of systems, and the responsiveness to warranty claims over time. Understanding which builder constructed a specific home is essential due diligence for any Union Park buyer.
The largest single presence in Union Park, Pulte's Traditions collection spans six phases and encompasses the community's broadest range of floor plans — from approximately 1,800 to 3,800 square feet. Pulte is consistently ranked among the top production homebuilders in the country for construction quality, warranty responsiveness, and buyer satisfaction. Their 10-year structural warranty, backed by Pulte's corporate resources, is among the strongest in the industry for production builders. The Pulte App allows homeowners to submit warranty claims, track their resolution, and access home documentation directly from a smartphone — a genuinely useful feature that simplifies the warranty process. Lot sizes in Pulte phases typically run 4,500 to 7,500 square feet.
Largest Presence Best Warranty Program Pulte App 6 PhasesShea Homes is widely regarded as the premium builder within Union Park, and pricing reflects this positioning. Shea occupies three phases within the community with homes ranging from approximately 2,100 to 4,200 square feet on slightly larger lots (5,000 to 8,500 square feet). Shea's construction quality — particularly in terms of fit and finish, hardware specifications, tile and flooring work, and cabinet quality at base price — consistently earns the highest marks among Union Park builders. Shea's Shea365 home monitoring app provides ongoing access to home system documentation and connects to a range of smart home integrations. Buyers willing to pay the premium for a Shea home generally report the highest satisfaction with both the product quality and the builder relationship.
Premium Quality Shea365 App Top Fit & Finish Larger LotsTaylor Morrison absorbed William Lyon Homes in 2020, consolidating what had been two separate builder presences in Union Park under a single corporate umbrella. Taylor Morrison is active across four phases in the community with homes spanning approximately 1,900 to 3,900 square feet. Taylor Morrison distinguishes itself through exceptional floor plan variety — they consistently offer the largest number of plan options and elevation choices, making it easier for buyers to find a specific layout that matches their family's lifestyle. The TM Home App provides documentation access similar to Pulte's system. Solar-ready conduit is standard on Taylor Morrison builds from 2018 onward, a notable sustainability feature. Taylor Morrison's quality and warranty performance generally falls between Woodside (entry) and Shea (premium).
Best Floor Plan Variety TM Home App Solar Ready Standard 4 PhasesTRI Pointe Homes occupies two phases within Union Park with their Encore collection, offering homes from approximately 2,000 to 3,600 square feet on lots of 5,000 to 7,200 square feet. TRI Pointe differentiates itself through design-forward architectural sensibilities — their homes tend to incorporate more modern, contemporary design elements (clean lines, larger windows, bold material choices) compared to the more traditional Craftsman or Spanish Colonial elevations common elsewhere in Union Park. For buyers who want a home that feels unmistakably contemporary rather than traditionally styled, TRI Pointe phases are worth exploring specifically. The limited presence (two phases) means TRI Pointe homes turn over less frequently on the resale market, which can create both scarcity and longer search times for buyers specifically targeting this builder.
Modern Design Design-Forward Alley Lots Limited PhasesWoodside Homes represents the value tier within Union Park, with homes from approximately 1,700 to 3,200 square feet in two phases at the lower end of the community's price range. Woodside's base specifications are somewhat more modest than the other builders — buyers will find less elaborate standard finishes and a shorter list of included features — but the core construction, structural quality, and community integration are comparable. For first-time luxury buyers entering the Union Park community at a lower price point, or for investors seeking maximum rental yield at minimum acquisition cost, Woodside phases offer the most accessible entry point. Woodside also tends to attract buyers who plan to upgrade finishes themselves post-purchase, which can be an effective strategy for building equity in a community where property values continue to appreciate.
Entry Price Point Value Tier Best Rental Yield Investor Friendly| Builder | Price Range | Phases | Sq Ft Range | Lot Size | Warranty | Notable Feature |
|---|---|---|---|---|---|---|
| Pulte Homes | $520K–$850K | 6 phases | 1,800–3,800 sf | 4,500–7,500 sf | 10-yr structural | Best warranty, Pulte App |
| Shea Homes | $580K–$920K | 3 phases | 2,100–4,200 sf | 5,000–8,500 sf | 10-yr structural | Shea365 App, top fit & finish |
| Taylor Morrison | $530K–$880K | 4 phases | 1,900–3,900 sf | 4,800–7,800 sf | 10-yr structural | TM Home App, solar ready |
| TRI Pointe Homes | $550K–$900K | 2 phases | 2,000–3,600 sf | 5,000–7,200 sf | 10-yr structural | Modern design, alley lots |
| Woodside Homes | $505K–$750K | 2 phases | 1,700–3,200 sf | 4,200–6,500 sf | 10-yr structural | Value tier, strong rental yield |
Regardless of builder, several inspection and due diligence items are particularly relevant in Union Park. All homes in the community were built on post-tension concrete slabs — a construction method that provides excellent structural performance in Arizona's expansive soil conditions but absolutely prohibits any cutting, drilling, or trenching through the slab without first obtaining the post-tension cable layout drawings from the builder and having a licensed structural engineer approve the work. This is critical context for buyers considering pool additions, any plumbing re-routing, or additions that require new slab penetrations. It is not a prohibitive issue — pools and additions are regularly completed in Union Park — but it adds a step and cost compared to communities built on conventional slab foundations.
Window and door frame caulking is a common maintenance item across all Union Park builders. Arizona's thermal cycling — extreme heat in summer, cold nights in winter — causes stucco and caulking to contract and expand, eventually creating micro-gaps at window, door, and pipe penetrations that can allow moisture to track behind the stucco if not maintained. Have your home inspector specifically examine all stucco penetrations for proper caulking and signs of moisture intrusion. This is not a major structural issue in most cases, but it is the most common deferred maintenance item in Union Park homes older than 5 years and should be addressed promptly to prevent more significant water damage.
HVAC sizing is also worth attention during inspection. Arizona's summer heat load requires properly sized air conditioning systems, and undersized HVAC — occasionally found in homes where the original system was inadequate for the home's square footage or where the home has added sunrooms or enclosed patios — results in dramatically higher electricity bills and shorter equipment life. Verify that the home's HVAC capacity (measured in tons) is appropriate for its conditioned square footage. A rough rule of thumb in AZ is approximately 400–500 square feet per ton, though proper Manual J calculations factor in ceiling height, insulation, window area, and orientation. For a 2,800 square foot Union Park home, a properly sized system would typically be 5 to 6 tons (potentially split-system with 2 units).
Appreciation, investment metrics, STR performance, and what the numbers mean for buyers and sellers.
Union Park at Norterra's real estate market in 2025 reflects the intersection of several powerful forces: a physically constrained supply of homes (the community is substantially built out with no new construction pipeline), persistently high demand from TSMC-related buyers, strong appreciation that has outpaced the broader Phoenix metro, and a relatively fast-moving market where properly priced homes move quickly. Understanding the market dynamics is essential whether you are buying to live in, buying to rent, or evaluating Union Park as an investment.
The median sale price for Union Park homes reached approximately $658,000 in 2025, up from the high-$600K range in 2024 and representing a dramatic increase from 2020 levels in the low-$400Ks. The five-year appreciation of approximately 52% stands among the strongest records of any master-planned community in the Phoenix metro and reflects both the community's inherent desirability and the structural supply constraint created by the completion of new construction. Unlike communities that can absorb demand with additional building, Union Park's build-out means that every new buyer must compete with existing buyers for the same finite pool of homes.
Year-over-year appreciation in 2025 continues at approximately 6.2%, moderated somewhat from the extraordinary 2021 peak (when some Phoenix submarkets saw 25–30% annual appreciation) but still well above long-run historical norms for Phoenix metro residential real estate. The 2022 and 2023 interest rate increases that caused price corrections in many Phoenix areas had a notably muted effect on Union Park — prices softened slightly in early 2023 before resuming appreciation by mid-year, supported by the TSMC relocation demand that continued largely irrespective of interest rate levels (many TSMC employees were cash-strong from equity at previous employers and relocation packages that included mortgage buy-down assistance).
Union Park's average days on market in 2025 is approximately 19 days — substantially faster than the broader Phoenix metro average and reflecting the community's position as a high-demand market with limited inventory. List-to-sale ratios of 99.2% indicate that sellers are receiving offers very close to (and in multiple-offer situations, above) asking price. Buyers in this market need to be pre-approved, prepared to act quickly when the right home appears, and realistic about the competitive environment. Bidding wars on move-in-ready, well-maintained homes at attractive price points remain common even as the overall Phoenix market has moderated from its 2021 peak frenzy.
The most sought-after homes in Union Park — four-bedroom layouts in the 2,800 to 3,400 square foot range, with upgraded kitchens, solar installed (not leased), and pool additions already completed — routinely receive multiple offers and close above list price within the first week of listing. Buyers who want to acquire these homes need expert representation, competitive offer strategies, and an agent who knows the community well enough to identify value and advise on appropriate offer terms. Conversely, homes with deferred maintenance, unfavorable locations within the community (adjacent to the I-17 sound wall or facing particularly high-traffic internal streets), or asking prices significantly above comparable sales do sit on the market longer and may have room for negotiation.
The long-term rental market in Union Park is robust, driven by the same TSMC workforce dynamics that have boosted the sale market. Employees relocating to Arizona who are not yet ready to buy — particularly those on temporary assignments of 12 to 24 months, or those who want to understand the community before committing to purchase — are strong renters who appreciate Union Park's design quality and commute advantage. A four-bedroom, two-bathroom home of approximately 2,400 square feet typically rents for $2,800 to $3,200 per month. Larger homes in the 3,000 to 3,600 square foot range command $3,100 to $3,500 per month. Average rental yield (gross annual rent as a percentage of acquisition cost) runs approximately 5.4% in the current market — competitive with comparable Phoenix submarkets and above what investors typically achieve in higher-priced Scottsdale.
Vacancy rates for well-maintained homes at market rents in Union Park have been consistently low — in the 3% to 5% range — reflecting the strong underlying demand and the relatively limited supply of rental homes in this specific community. Many owners in Union Park are owner-occupants, meaning rental inventory is concentrated among the smaller investor-owner segment. This supply constraint benefits landlords in terms of vacancy rates and negotiating power with prospective tenants.
Arizona's preemption statute (ARS §9-500.39) prohibits cities and towns from banning short-term rentals, and Union Park's master HOA CC&Rs do not appear to contain a blanket prohibition on STR use (though CC&Rs vary by phase and sub-HOA, and buyers should verify their specific parcel's CC&Rs before purchasing with STR intent). Airbnb and VRBO listings do exist within Union Park and report strong performance, particularly in the segments serving TSMC and semiconductor industry contractor stays — bookings of 30 to 90 days at a time that take advantage of Arizona's "vacation rental" designation under state law.
A fully furnished four-bedroom STR in Union Park targeting contractor stays can typically achieve $2,400 to $3,800 per month in total revenue, with occupancy rates generally above 80% given the persistent demand from the TSMC workforce rotation. The STR model requires more active management than long-term rental — furnishing costs, guest communication, cleaning turnover, and occasional damage — but the revenue premium over long-term rental can be 15% to 30% for well-managed properties. Several Union Park investors use local property management companies specializing in mid-term rentals (30+ day stays) to serve the TSMC contractor market, which combines the higher revenue of STR with the lower operational intensity of longer stays.
| Factor | Union Park | Norterra (Original) | Fireside (Peoria) | Happy Valley (Phoenix) |
|---|---|---|---|---|
| Median Sale Price | $658,000 | $540,000 | $495,000 | $510,000 |
| Built Era | 2016–2024 | 2002–2015 | 2005–2016 | 1992–2008 |
| HOA / Month | $155–$210 | $125–$180 | $130–$175 | $95–$155 |
| Community Pools | 3 resort pools | 2 pools | 2 pools | 1 pool |
| Walkability Design | High (TND grid) | Medium | Low | Low |
| School District | Deer Valley USD | Deer Valley USD | Deer Valley USD | Deer Valley USD |
| TSMC Commute | 10 min | 15 min | 18 min | 20 min |
| Street Design | Urban grid (TND) | Curvilinear | Curvilinear | Curvilinear |
| CFD Assessment | Yes ($600–$1,200/yr) | No | Some phases | No |
| Walkable to Retail | Yes (via paseo) | Near (drive) | No | No |
| STR Allowed | Yes (verify HOA) | Yes | Yes | Yes |
| Home Style | Varied (Craftsman/Modern) | Traditional SW | Traditional SW | Traditional SW |
| Metric | Value |
|---|---|
| Median Sale Price | $658,000 |
| Median Square Footage | 2,850 sf |
| Median Price Per Sq Ft | $231/sf |
| 1-Year Appreciation | +6.2% |
| 5-Year Appreciation | +52% |
| Average Days on Market | 19 days |
| List-to-Sale Ratio | 99.2% |
| Average 4BR Long-Term Rent | $2,950/month |
| Gross Rental Yield | ~5.4% |
| STR Revenue (4BR) | $2,400–$3,800/month |
| Active CFD Assessment | $600–$1,200/year |
| Master HOA Monthly | $155–$210 |
| Property Tax Rate | ~1.3% assessed value |
| TSMC Commute | 10–12 min via I-17 |
| 2026 Conforming Loan Limit | $806,500 |
| HOA Sub-Assessment (some phases) | +$30–$75/month |
Deer Valley Unified School District — one of Arizona's highest-rated large school districts.
Union Park at Norterra falls within the Deer Valley Unified School District (DVUSD), consistently ranked among the top large school districts in Arizona by the Arizona Department of Education and independent rating organizations. DVUSD serves approximately 45,000+ students across north Phoenix in a district that spans from the Norterra corridor in the south to the Anthem area in the north. The district has earned a state report card rating that places it in the highest tiers for academic achievement, growth, and educational programming across both traditional and alternative pathways.
School attendance zones within Union Park are an important point for buyers to verify directly with DVUSD, as the community spans multiple attendance zones at the elementary and middle school levels. Different phases of Union Park may feed into different K-8 schools. High school attendance zones are more consistent — virtually all of Union Park falls within the Sandra Day O'Connor or Barry Goldwater High School attendance zones — but the K-8 situation requires confirmation for the specific address being purchased. Always verify school assignments with DVUSD before finalizing a purchase decision if schools are a significant factor in your choice.
Named for Arizona's own Supreme Court Justice Sandra Day O'Connor, this school is the primary high school serving Union Park's attendance zones. With approximately 2,600+ students, SDO is a large comprehensive high school with exceptional academic programming. STEM offerings include AP Biology, AP Chemistry, AP Physics, AP Computer Science Principles and AP Computer Science A, pre-engineering coursework, and strong mathematics through AP Calculus BC. The school's debate program has produced state champions, and its performing arts program is among the most active in DVUSD. SDO consistently ranks in the top tier of Arizona high schools for college readiness, AP exam participation and passage rates, and four-year college enrollment.
Barry Goldwater High School, named for Arizona's legendary senator and 1964 presidential candidate, sits approximately 5 minutes from Union Park and serves portions of the community's attendance zones. Goldwater's most distinctive program is its JROTC (Junior Reserve Officers' Training Corps) and aerospace program — one of the strongest high school aerospace and aviation pathways in the state. For families with interest in military service, aviation, or aerospace careers, Goldwater's programming is exceptional. The school also offers strong AP and dual enrollment options through Rio Salado Community College, and its athletic programs — particularly football and cross country — compete at the highest level within Arizona's large-school classification.
An elementary school within or immediately adjacent to the Union Park community serves younger students in nearby attendance zones. Parents of elementary-age children should verify the specific school assigned to their prospective address with DVUSD, as zone boundaries within the community can vary by phase. DVUSD elementary schools in this corridor generally serve K-6 or K-8 grade bands and participate in district-wide gifted education programs, English language learning support, and STEM-integrated curriculum frameworks adopted districtwide.
Frontier Elementary serves portions of the north Phoenix corridor and is among the higher-performing elementary schools in DVUSD. The school's participation in the district's dual language and enrichment programs, combined with active parent community involvement, has driven strong academic outcomes and family satisfaction. For Union Park buyers whose attendance zone feeds into Frontier, the school is widely regarded as an asset rather than a concern. Walking and biking access from many Union Park phases is practical given the community's bicycle infrastructure.
The north Phoenix corridor has developed a strong charter school ecosystem alongside the DVUSD public schools. Options within reasonable drive times from Union Park include BASIS Phoenix North (one of the highest-academically rated charter schools in the country, with competitive admission), Great Hearts Monte Vista (classical education philosophy, 7th-12th grade), and Legacy Traditional School (structured, back-to-basics curriculum). Arizona's robust school choice framework allows parents significant flexibility in school selection, and many Union Park families take advantage of charter and magnet options in addition to or in place of their assigned district school.
Arizona State University's main campus in Tempe is approximately 35 minutes from Union Park via I-17 and the Loop 202. ASU — ranked #1 in the United States for innovation by US News for nine consecutive years — is one of the largest universities in the country by enrollment and offers an enormous breadth of programs at the undergraduate, graduate, and doctoral levels. For TSMC employees pursuing advanced degrees, ASU's engineering programs in semiconductor science, electrical engineering, and materials science are particularly relevant, and the university has developed specific partnerships with the semiconductor industry in Arizona.
The arrival of TSMC and the broader semiconductor industry cluster in north Phoenix has had a notable effect on DVUSD's educational programming. The district has actively expanded STEM pathways at both the high school and middle school levels, recognizing that the workforce of the future in this corridor will be heavily concentrated in semiconductor, electronics, and technology fields. Sandra Day O'Connor High School has developed relationships with TSMC for career exploration and internship opportunities, and DVUSD's Career and Technical Education (CTE) programs have expanded semiconductor and electronics manufacturing pathways in response to industry demand. For families relocating with TSMC who have school-age children interested in STEM careers, the alignment between the local school district's programming and the dominant regional employer is an unusual and valuable synergy.
Private school options in the corridor include Cactus Shadows High School's attendance zone for some Cave Creek areas, and several private Catholic and charter schools throughout north Phoenix. For parents with specific religious education preferences, Our Lady of Joy Catholic School and various other faith-based options exist within 15 to 20 minutes of Union Park. The combination of strong public schools, rigorous charter options, and accessible private alternatives makes the Union Park area among the strongest in the valley for educational choice across a wide range of family values and educational philosophies.
From walkable errands to Sonoran desert hikes — the complete lifestyle picture of north Phoenix's most distinctive community.
Life in Union Park at Norterra revolves around a rhythm that is genuinely unusual for the Phoenix metro: neighbors talking on front porches, children riding bikes through the pocket park network, families walking to the Norterra AMC on a Friday night, residents running the community's extensive trail system before the desert heat peaks in the late morning. The New Urbanism design that distinguishes Union Park's physical environment translates directly into a different quality of daily life — one that residents consistently describe as more connected, more active, and more community-oriented than their previous suburban experiences in Phoenix or elsewhere.
The Union Park Community Association maintains an amenity portfolio that compares favorably with resorts, much less suburban HOA common areas. The three master community pools are heated, meaning year-round swimming is practical even during Arizona's mild winter months. The pools are distributed throughout the community so that no resident is more than a comfortable walk from water. Each pool area includes lap lanes for fitness swimmers, a recreational area for families, lounge furniture, and shaded ramadas for gatherings. Summer hours are extended to accommodate early-morning and late-evening swimmers who want to avoid the midday Arizona heat.
The two fitness centers are equipped to meet the needs of serious fitness enthusiasts, with free weights, resistance machines, cardio equipment, and space for group exercise. Access is included in the master HOA assessment, making these facilities an excellent value for residents who would otherwise pay $50 to $100 per month for commercial gym memberships. The fitness centers see particularly heavy use by TSMC employees who value the early-morning workout option before the I-17 commute north to the fab.
The eight-plus miles of internal trails and paseos create a complete pedestrian and cycling network within the community. These paths connect every pocket park, both fitness centers, all three pools, the community garden, the Bark Park, and the event pavilion. They also connect to the broader north Phoenix trail network, including access routes to the Sonoran Desert Preserve trail system. For fitness walkers, joggers, and cyclists, the internal network alone provides enough variety for daily workouts without ever leaving the community — though the connection to the Sonoran Preserve trails extends that network dramatically.
The dedicated pedestrian connection from Union Park to the Norterra commercial district is one of the community's most distinctive and practically valuable features. Norterra anchors a multi-acre commercial center that includes a full-size Target (with Starbucks and fresh grocery sections), an AMC 8-screen movie theater that regularly gets new releases, a Subway, an Applebee's, a Denny's, an Arby's, a Sport Clips, a UPS Store, and a variety of other service businesses. For basic weekly needs — prescription pickups, minor grocery runs, a movie night, a casual dinner out — Norterra is accessible without a car from most Union Park homes.
The pedestrian path connecting Union Park to Norterra runs through a combination of landscaped easements and enhanced crossings. On a pleasant Arizona winter or spring evening — and to a lesser degree even in the summer, when the path is most convenient in the evening hours after temperatures drop — walking to Norterra and back is a genuine lifestyle amenity that residents invoke frequently when describing what makes Union Park special. In Phoenix, a city built almost entirely around the automobile, the ability to walk to a meaningful commercial district is extremely rare and adds tangible quality-of-life value that doesn't show up easily in price-per-square-foot comparisons.
Beyond the walkable Norterra connection, Union Park's position at Happy Valley Road and I-17 places residents within a 5 to 10 minute drive of essentially every major retail and dining option a Phoenix metro household needs. The Happy Valley Parkway corridor immediately south of the community includes a Walmart Neighborhood Market, a Walgreens, a Filiberto's Mexican Food (an Arizona original and beloved local chain), and a growing collection of fast-casual and sit-down dining options. The I-17 / Loop 101 interchange approximately 8 minutes west opens up access to a massive commercial district including Costco, Home Depot, Target, Best Buy, Lowe's, and dozens of additional retail, dining, and service options.
For dining and entertainment beyond chain restaurants, Cave Creek — Arizona's western-themed arts and entertainment town — is approximately 20 minutes east along Happy Valley Road. Cave Creek's dining scene includes some of the valley's most distinctive restaurants and bars, with indoor-outdoor formats, live music, and a relaxed western atmosphere that contrasts appealingly with Union Park's more designed neighborhood character. Scottsdale's dining, arts, and entertainment corridor — among the best in the Southwest — is approximately 25 minutes from Union Park via Loop 101 or SR-51.
The Sonoran Desert Preserve, which forms Union Park's northern boundary, provides immediate access to some of the best accessible desert hiking in the Phoenix metro. The Sonoran Preserve's trail system covers tens of thousands of acres of undisturbed Sonoran Desert — saguaro cactus, palo verde, ironwood, and the remarkable variety of desert flora and fauna that make this region biologically distinctive. Trails range from easy, flat walking paths accessible to hikers of all fitness levels to more challenging ridge routes with mountain biking infrastructure. For residents of Union Park, the preserve's southern trailheads are accessible directly from the community's own trail network, creating a seamless transition from suburban streets to wild desert without a car trip.
For more developed hiking destinations, North Mountain Preserve is approximately 20 minutes south on I-17, offering classic Phoenix-style urban mountain hiking with skyline views. Reach 11 Recreation Area, approximately 15 minutes east via Happy Valley Road, provides flat trail running and cycling opportunities along the CAP canal corridor. Pinnacle Peak Park in Scottsdale — one of the most popular and scenic desert hikes in the entire metro — is approximately 25 to 30 minutes from Union Park. For serious hikers, the McDowell Sonoran Preserve in Scottsdale (one of the largest urban wilderness areas in the United States) is approximately 35 to 40 minutes away and provides world-class trail experiences.
Heated pools, lap lanes, lounge areas. Year-round swimming.
Free weights, machines, cardio. HOA-included.
Paseos, pocket parks, desert preserve access.
8-screen theater at Norterra — walkable via paseo.
Dedicated dog park within community. Fenced, with separate large/small dog areas.
Direct access to Sonoran Desert trails from community's northern edge.
Full-size Target walkable from most Union Park homes.
Maintained community garden plots available to residents.
CFD assessments, HOA structure, post-tension slabs, AZ law, and inspection flags — comprehensive due diligence for Union Park buyers.
The single most important non-obvious cost that Union Park buyers must understand and verify before making an offer is the Community Facilities District assessment. An ARS Title 48 CFD is a special taxing district that levies an annual assessment on property owners to fund public infrastructure — roads, utilities, parks, and other improvements — that were built to support the development. CFD assessments are entirely separate from standard Maricopa County property taxes, and they do not appear in the standard property tax estimate that a lender or real estate agent might provide.
Most parcels in Union Park carry an active CFD assessment of approximately $600 to $1,200 per year, which works out to $50 to $100 per month of additional housing cost. For a home at the Union Park median price of $658,000, this CFD assessment represents an additional 0.09% to 0.18% of the purchase price annually — not enormous in percentage terms, but absolutely a material cost that belongs in your monthly payment calculation and your investment analysis. The CFD amount varies by parcel and phase, so it must be confirmed at the county level for the specific property under consideration. Your agent should obtain this information before you make an offer, or you should request it as a due diligence item before your inspection period expires.
Union Park's HOA structure is layered. All homes in the community pay into the Union Park Community Association (master HOA), which maintains the shared amenities: the three pools, two fitness centers, trail network, pocket parks, Bark Park, community garden, and event pavilion. Master HOA dues run $155 to $210 per month. Some phases of Union Park also carry a sub-HOA — a phase-specific homeowner association that may assess additional dues of $30 to $75 per month to maintain phase-specific common areas, additional landscape features, or amenities specific to that builder's development.
Before finalizing any Union Park purchase, obtain and carefully review both the master association's CC&Rs and the relevant sub-HOA documents if applicable. CC&Rs govern exterior modifications, landscaping, parking, rental policies (including STR provisions), pet rules, noise, and a host of other matters that will affect your daily life and your ability to make changes to the property. The Arizona ARS §33-1806 HOA disclosure requirement mandates that sellers provide HOA documents within a specified timeframe after a sale contract is executed. Review these documents during your inspection period, before the earnest money becomes non-refundable. If you have STR plans, confirm specifically that the applicable CC&Rs do not restrict or prohibit short-term rentals, as this varies by phase.
Every home in Union Park at Norterra — across all builders and all phases — was constructed on a post-tension concrete slab foundation. Post-tension slabs incorporate high-strength steel cables tensioned after the concrete is poured, creating a foundation that performs extremely well in Arizona's challenging soil conditions (expansive clay soils that can cause conventional slab foundations to crack under the swelling and shrinking that comes with the wet/dry seasonal cycle). Post-tension slabs have excellent structural performance records, and they are the correct engineering choice for Arizona residential construction.
However, post-tension slabs have one critical characteristic that every Union Park buyer and homeowner must internalize: they absolutely cannot be cut, drilled through, or penetrated in any way without first obtaining the post-tension cable layout drawing from the original builder and having a licensed structural engineer review and approve any planned work. The cables are embedded in the concrete at specific locations. Cutting a cable — which would happen if, for example, a plumber drilled through the slab without checking the cable map, or if a pool contractor excavated too close to the foundation perimeter without engineering review — permanently damages the slab's structural integrity and can create a safety hazard and an extremely expensive repair. In the worst cases, slab repair after a cable has been cut requires full or partial slab replacement.
Practically, this means that adding a pool requires obtaining the cable layout drawing and an engineering letter before any excavation begins. Running new plumbing or making plumbing changes requires the same documentation review. Any addition that connects to the existing slab requires engineering approval. This is not a reason to avoid Union Park homes — it is simply a process step that is non-negotiable. Builders typically retain post-tension cable drawings on file for years after construction, and they are generally obtainable with a written request and documentation that you are the current owner.
Pools are among the most popular post-construction improvements in Union Park, and the community's moderate lot sizes (4,200 to 8,500 square feet) can accommodate compact pool designs in rear yards while maintaining comfortable outdoor living space. The HOA approval process for pool additions is generally routine — the community's CC&Rs contemplate and permit pools in appropriate yard locations — but it requires submitting plans to the HOA Architectural Review Committee for approval before beginning construction. Typical approval takes 2 to 4 weeks once complete application materials are submitted.
Beyond HOA approval, pool addition in Union Park requires: (1) post-tension cable layout drawing from the original builder; (2) structural engineering letter confirming that the proposed excavation location and depth do not conflict with post-tension cables; (3) City of Phoenix pool permit; (4) Arizona pool barrier compliance per ARS §36-1681 (fencing, gate, alarm requirements for all residential pools). Total cost for a compact pool addition (15x30 foot lap-style or freeform design) in Union Park typically runs $45,000 to $75,000 depending on finishes, equipment specifications, and contractor. This is a significant investment but one that adds meaningful value in a community where pool ownership is highly valued and expected by buyers at the $600K+ price point.
Arizona is a non-disclosure state for real estate sale prices — recorded sale prices are not public record, which means the general public cannot look up what a neighbor paid for their home. This differs from most states and is relevant to how market values are determined in Arizona: appraisers and agents rely on the Arizona MLS (Multiple Listing Service) for sale price data rather than public records. For buyers, this underscores the importance of working with an agent who has active access to MLS comparable sales data when evaluating whether a listing is priced fairly.
Arizona is also a "dry funding" state, meaning that the closing process works differently than in some other states. In Arizona, the closing date, funding date, and recording date (when title officially transfers) typically all occur on the same day. When you close escrow in Arizona, you get the keys that same day — there is no gap between signing documents, funding the loan, and receiving title. This is generally buyer-friendly, but it requires that all parties (lender, title company, escrow) be synchronized, and it means that last-minute lender delays on the funding side can affect possession timing. Your escrow officer and lender should communicate clearly about the funding timeline in the days leading up to closing.
The BINSR (Buyer's Inspection Notice and Seller's Response) process governs the inspection period in Arizona transactions. The standard AAR purchase contract provides a 10-day inspection period during which buyers can have the property inspected and present the seller with a list of repair requests. The seller has 5 days to respond — accepting repair requests, offering a credit, declining, or offering some combination. If the parties cannot reach agreement on inspection items, the buyer may cancel the contract and recover earnest money within the inspection period. The BINSR process requires clear communication and experienced representation to navigate effectively, particularly when significant inspection items (HVAC deficiencies, roofing issues, deferred maintenance) are identified.
In addition to the post-tension slab and stucco penetration caulking items already noted, Union Park buyers should ensure their inspector pays specific attention to several areas. First, rooftop solar systems, which are present on many Union Park homes: determine whether the solar is owned outright by the seller or is subject to a lease or power purchase agreement (PPA). Leased or PPA solar systems transfer to the buyer at closing and bring with them a contractual obligation (typically a 20-year agreement with a solar company) that affects the total cost of ownership. Owned solar systems are clearly preferable and add equity value; leased systems add complexity. Verify the status in every transaction involving solar equipment.
Second, review the HVAC equipment age and condition carefully. Arizona's extreme summer heat loads HVAC systems heavily, and units in Union Park homes built 2016 through 2020 are now approaching or past the midpoint of their useful lives. Confirm that all units are sized appropriately, that annual preventive maintenance has been performed (check for maintenance records in the seller's disclosure), and that refrigerant is the current R-410A specification rather than the phased-out R-22 (Freon) that was standard through approximately 2009. R-22 refrigerant is extremely expensive to replace due to the January 2020 production phase-out, and aging R-22 systems in need of refrigerant recharge are a significant cost red flag.
Third, check the garage for evidence of proper EV conduit installation if EV charging capability is important to you. In homes built by Pulte and Taylor Morrison from 2020 onward, pre-installed conduit for Level 2 EV charging is standard and means that installing a Level 2 charger costs only the cost of the charger unit and a licensed electrician to wire it — typically $300 to $800 for the installation. In older phases without pre-installed conduit, adding a Level 2 circuit from the main panel to the garage may require more extensive electrical work at higher cost.
Union Park at Norterra is served by the City of Phoenix water system, which holds an Arizona Department of Water Resources (ADWR) Assured Water Supply designation under ARS §45-576. This means the city has demonstrated that it has a physically available, legal, and continuously deliverable 100-year supply of water for all currently developed and planned development within its service area. For buyers concerned about Arizona's much-publicized water challenges, City of Phoenix water service is among the most secure in the state. Phoenix has diversified its water portfolio across Colorado River water (CAP), Salt and Verde River water (SRP), groundwater, and recycled water in a way that provides meaningful resilience against single-source drought impacts.
Electricity for Union Park is provided by Arizona Public Service (APS), the state's largest investor-owned utility. APS rates include time-of-use pricing options that can significantly benefit households that shift energy-intensive activities (EV charging, dishwasher, laundry) to off-peak hours. For Union Park homes with rooftop solar, net metering arrangements with APS govern how excess solar production is credited — buyers with solar should understand the specific net metering arrangement in place, as APS has modified its net metering program over time and older agreements may be more favorable than newer ones.
Key Due Diligence Checklist for Union Park Buyers: (1) Confirm CFD amount at Maricopa County Assessor; (2) Obtain and review master HOA AND sub-HOA CC&Rs; (3) Verify STR provisions if rental plans apply; (4) Request post-tension cable drawings from builder before pool or renovation planning; (5) Confirm solar ownership vs. lease; (6) Verify HVAC sizing and refrigerant type; (7) Inspect stucco penetrations; (8) Check EV conduit status in garage; (9) Verify school attendance zone with DVUSD.
Ryan Moxley is a top 1% Phoenix REALTOR® who specializes in north Phoenix master-planned communities. Get expert guidance through every step of your Union Park purchase.