Build Your Own Home in the Phoenix Metro — Construction-to-Permanent Loans, Draw Schedules, Land Acquisition, Build Costs, and Everything You Need to Know Before Breaking Ground
A construction loan is a short-term loan — typically 12 to 24 months — specifically designed to fund the construction of a home on a lot you own (or are purchasing). Unlike a traditional mortgage where you receive a lump sum at closing to buy a finished home, construction loans disburse funds in stages called "draws" as construction milestones are completed and verified.
The core mechanics differ from a traditional mortgage in three important ways:
The most popular construction financing product in Arizona is the Construction-to-Permanent loan, abbreviated C2P or called a "one-time close" loan. Understanding how it works is essential before approaching any construction lender.
A C2P loan has two phases that operate under a single loan agreement with one closing:
Phase 1 — Construction Phase: From the date of closing through the date your Certificate of Occupancy (CO) is issued, the loan operates as a construction loan. Funds are disbursed in draws per the draw schedule. You pay interest only on drawn balances. The construction loan interest rate is typically fixed at closing and applies during the build.
Phase 2 — Permanent Mortgage: When the CO is issued and the home passes final inspections, the loan automatically converts (or "rolls") to a permanent, amortizing mortgage. No second closing, no second set of closing costs, no separate mortgage application. The terms of the permanent mortgage (rate, term, payment) were established at the original closing.
The alternative to a C2P loan is a two-stage financing approach: take a construction loan during the build, then refinance to a permanent mortgage at completion. This was more common 10 to 15 years ago. Today, C2P dominates for several reasons:
The two-time close approach has one scenario where it outperforms C2P: when you expect rates to fall significantly during construction and you want to take advantage of lower rates at the permanent financing stage. In a falling rate environment, waiting to lock your permanent mortgage at completion means you benefit from rate drops during the build. The trade-off is two closings and rate uncertainty. Most buyers in 2026 prefer rate certainty (C2P) over rate risk (two-stage).
The draw schedule is the timeline and structure for how your construction loan funds are released. Understanding it protects you from cash flow problems during construction and ensures your contractor is paid on schedule.
Before you can obtain a construction loan, you need a lot. Arizona's land market is unique — active, with several acquisition paths available to buyers who know where to look.
The most straightforward path: individual lot owners listing their land for sale, accessible through the MLS (Multiple Listing Service) or through buyer's agent relationships with land specialists. In the Phoenix metro, private lots are available across a wide price spectrum:
The Arizona State Land Department (ASLD) manages approximately 9.2 million acres of state trust land that was granted to Arizona at statehood to fund public education. ASLD regularly auctions residential, commercial, and agricultural lots through their online auction platform at azland.gov.
ASLD auctions are an underutilized opportunity. Available lots include parcels in desirable growth corridors that come to market through a competitive bid process. Key characteristics:
I track ASLD auctions in the TSMC corridor and other high-value growth areas. If you're interested in land acquisition through ASLD, contact me at (480) 227-9143 — timing and due diligence are everything in the auction process.
Arizona's desert topography creates flood risk in locations that don't appear at risk in wetter climates. Arroyos (seasonal stream channels), wash corridors, and low-lying areas can experience extreme flash flooding during monsoon storms — Arizona's late summer rainy season (July through September). FEMA floodplain maps (available at FEMA's Flood Map Service Center) designate flood zones for all Arizona parcels. Key rules:
Flood zone designation is a critical lot due diligence item. Lots in AE zones cost significantly more to build on (elevated slab, engineered fill), require mandatory flood insurance ($800 to $4,000+/year), and may have reduced buyer pools at resale. Verify any lot's flood zone designation before making an offer.
Caliche is a hardened layer of calcium carbonate (limestone) that forms naturally beneath the surface in desert soils throughout the Sonoran Desert. Its depth, thickness, and hardness vary dramatically by location. Caliche can be 6 inches below the surface or 4 feet down; it can be soft and crumbly or hard enough to require jackhammering or blasting for excavation.
Why it matters for lot buyers:
Before buying any vacant lot in Arizona, commission a geotechnical (soils) report. A geotech report ($1,500 to $4,000) provides boring data showing soil composition, caliche depth, and bearing capacity — essential information for your foundation engineer and contractor. This cost is always worth it.
A custom home build requires coordinating multiple specialized professionals. Here is each team member's role and how to select them:
Custom homes require architectural drawings — stamped plans that specify every dimension, material, and structural element. Your options:
The GC is the builder — the professional who manages the entire construction process, hires and coordinates all subcontractors, manages the schedule, and ensures the project is built per plans and specifications.
AZ Licensing: All GCs and specialty contractors in Arizona must be licensed by the Arizona Registrar of Contractors (AzROC) at azroc.gov. Verify any GC's license status before signing a contract. An unlicensed GC is illegal, uninsured, and leaves you with no recourse through the ROC's dispute resolution system.
How to select a GC:
GC fee structure: GCs typically charge 15% to 25% overhead and profit markup on subcontractor and material costs. On a $500,000 hard cost build, that's $75,000 to $125,000 in GC fee — a significant but necessary cost for professional project management.
Custom home plans require stamped structural engineering drawings. The engineer specifies foundation design (post-tension cable layout, slab thickness, beam sizes), shear wall and lateral bracing, and all structural elements. Cost: $2,500 to $8,000 for a residential custom home depending on complexity. Some stock plan services include basic structural calculations; always have a licensed Arizona PE (Professional Engineer) stamp the plans for your jurisdiction's permit process.
Before the foundation can be designed, a geotech report must characterize the soil conditions at your specific lot. The report includes soil boring data, soil classification, caliche depth, bearing capacity, and recommendations for foundation type and design. Cost: $1,500 to $4,000. The foundation engineer uses this report to design your slab appropriately for site conditions.
Your own independent inspector (ASHI or InterNACHI certified, with new construction experience) should conduct phase inspections at the same milestones as your buyer's agent would in a production builder transaction:
The inspector's findings identify defects when they are still correctable — before drywall covers rough-in errors or concrete conceals slab problems. Budget $300 to $500 per inspection, or $800 to $1,200 for all three.
Arizona law allows owner-builders to pull their own construction permits without a licensed GC under certain conditions (ARS §32-1121 exemption). This means you become the GC — responsible for hiring all subcontractors, managing the schedule, coordinating inspections, and taking on all project liability.
Owner-builder is viable for experienced builders with construction management background. For most people, it is not recommended:
Understanding the full cost of building a custom home in Arizona requires accounting for four distinct cost categories. Many buyers focus only on the "hard costs" (actual construction) and are surprised by the total project cost. Here is the complete picture:
| Cost Category | Standard Finish (2,500 sqft) | Luxury Finish (2,500 sqft) | Notes |
|---|---|---|---|
| Land (metro area) | $150,000–$300,000 | $250,000–$600,000+ | Varies dramatically by location; TSMC corridor commands premium |
| Architectural Design | $12,000–$25,000 | $25,000–$60,000+ | Stock plans + adaptation at lower end; full custom at high end |
| Permits & Fees | $8,000–$18,000 | $12,000–$25,000 | Building permit, plan check, impact fees vary by city |
| Engineering (structural, geotech) | $4,000–$10,000 | $6,000–$15,000 | More complex designs require more engineering |
| Surveys & Site Work | $3,000–$7,000 | $4,000–$10,000 | Boundary survey, elevation certificate, lot grading |
| Hard Construction Costs | $220–$300/sqft = $550K–$750K | $350–$600/sqft = $875K–$1.5M | Foundation, framing, mechanical, finishes, caliche variable |
| Contingency Reserve (12%) | $66,000–$90,000 | $105,000–$180,000 | Non-negotiable; AZ heat and caliche create cost surprises |
| Landscaping | $18,000–$40,000 | $40,000–$120,000+ | Front + back; pool adds $60,000–$100,000+ |
| Builder's Risk Insurance | $1,500–$3,500/year | $2,500–$6,000/year | Required by construction lender during build |
| Total Project Cost Range | $810,000–$1,240,000 | $1,320,000–$2,500,000+ | Wide range reflects lot and finish decisions |
Cost estimates for Phoenix metro area, July 2026. Material costs, labor rates, and land values fluctuate. Get current bids from licensed contractors before committing to a budget. Post-tension slab adds $8,000–$15,000 vs. conventional. Pool adds $60,000–$100,000+ to total project cost.
Construction loan underwriting is more complex than traditional mortgage underwriting. Here is what specialized construction lenders evaluate when you apply:
Construction loan appraisals are "subject to completion" appraisals based on the plans and specifications you provide. The appraiser estimates the "as-completed" value of the home — what the finished home will be worth. This value must support the total loan amount (typically 80% LTV). If the as-completed appraisal comes in below the projected construction cost, you may need additional down payment or need to scale back the project scope.
Virtually all new residential construction in the Phoenix metro uses post-tension slab foundations. Arizona's expansive clay soils and caliche layers make conventional foundations less appropriate. Post-tension slabs use high-strength steel cables (typically 270,000 psi tensile strength) embedded in the concrete. After the concrete cures, the cables are tensioned by hydraulic jack, placing the concrete in compression — which dramatically increases the slab's load capacity and crack resistance.
Key rules for post-tension slabs that all new homeowners must internalize: Never drill into a post-tension slab without first identifying cable locations using a cable detector. Never cut into a post-tension slab under any circumstances. Post-tension cables are under 25,000 to 33,000 pounds of tension per cable — cutting one causes explosive energy release and can kill. No fence posts, dog tie-out anchors, or plumbing penetrations through the slab without engineering review.
Arizona's Active Management Areas (AMAs) require all new subdivision plats to demonstrate a 100-year assured water supply. For urban and suburban lots within the Phoenix AMA (covering the entire metro), this requirement is satisfied by municipal water utility connection. For rural lots outside city/town water service areas, the water supply solution is either: (1) private well with yield and quality testing, or (2) a water hauling and cistern system (generally not acceptable for construction loan financing). Before purchasing any rural lot in Arizona, verify the water supply solution and its feasibility at your specific location.
Arizona has a complex patchwork of county and municipal zoning jurisdictions. Lots within incorporated city limits follow the city's zoning code. Lots in unincorporated areas follow Maricopa County's zoning code (or other county's code). Rural residential zones (R-43, A-1, and similar) have different setback requirements, lot coverage limits, height restrictions, and accessory structure rules than standard residential zones.
Before purchasing any lot, verify:
Arizona municipalities each have their own building department with their own plan review process and fee schedule. Plan review times vary significantly: Phoenix, Mesa, and Chandler have online submission and faster review; smaller municipalities may have longer paper-based review periods. Expect:
| Comparison Point | Buy Production Builder Home ($650K) | Build Custom on Your Lot (~$900K total) |
|---|---|---|
| Total cost | $650,000 (set price) | $800K–$1.2M (high variability) |
| Timeline to move-in | 1–9 months (inventory or build) | 14–27 months from lot purchase |
| Design control | Builder plans + design studio selections | Full architectural control |
| Cost certainty | High (contract price set at signing) | Low (change orders and surprises common) |
| Quality control | Builder manages; phase inspections available | You manage via GC; inspections critical |
| Energy efficiency | Builder standard (varies by builder) | You specify; can achieve very high performance |
| Financing complexity | Standard mortgage | Construction loan (more complex, higher rate) |
| Down payment | 5–20% of purchase price | 20% of total project cost minimum |
| Warranty | Builder 1-2-10 warranty | GC warranty + subcontractor warranties; ARS §12-1361 |
| CFD assessment | Common in new MPCs ($800–$3,500/yr) | Depends on lot location (often none) |
| HOA | Standard for MPCs ($80–$300/mo) | Depends on lot location (often none) |
| Resale demand | Established community with comparable sales | Custom homes command premium but smaller buyer pool |
| Best for | Buyers wanting certainty, timeline, and simplicity | Buyers who need very specific features or lot characteristics |
Comparison is illustrative. Production builder cost assumes 2026 mid-tier builder pricing in Phoenix metro. Custom build cost assumes 2,500 sqft standard finish on metro-area lot. Actual costs vary significantly by location, specifications, and market conditions.
Land transactions in the Phoenix metro have unique due diligence requirements — utilities, zoning, flood zones, easements, ASLD encumbrances, and caliche assessment — that an experienced buyer's agent navigates for you. I represent land buyers in the Phoenix metro and can help you find and properly evaluate the right lot for your custom build. Call or text to start your lot search.
Call (480) 227-9143Tell me about your project and I'll provide guidance on lot availability, construction loan lender referrals, and the build process for your specific situation.
Not every mortgage lender offers construction loans. The product requires specialized underwriting expertise, construction monitoring infrastructure (draw inspectors), and risk tolerance for a longer-duration exposure. Here is where to find qualified construction lenders in Arizona:
Arizona's regional banks and savings institutions are historically the strongest construction lenders. Western Alliance Bank, National Bank of Arizona, Pinnacle Bank, and Arizona Bank & Trust all have track records in construction and construction-to-permanent lending. Local banks often offer more flexible underwriting and responsive service than large national banks, and their loan officers typically have deep familiarity with Arizona construction costs, subcontractor relationships, and local building department timelines.
Arizona's large credit unions (Arizona Federal, Desert Schools, TruWest, OneAZ) also offer construction loan products to members. Credit unions often offer lower fees and competitive rates, particularly for members with established deposit relationships. Check whether your existing financial institution offers construction lending.
Several national mortgage companies have construction loan divisions: Movement Mortgage, Flagstar Bank, TD Bank, and others offer C2P products through their residential division. Rates and terms vary; compare multiple quotes as you would with any mortgage.
Unlike shopping for a purchase mortgage where the loan is straightforward and rate comparison is relatively simple, construction loans require more nuanced comparison:
Custom home construction requires specific insurance coverages that differ from a standard homeowner's policy:
Builder's risk insurance (also called course of construction insurance) is required by virtually all construction lenders. This policy covers the home under construction against fire, vandalism, theft of materials, wind, and other perils during the build period. Coverage is based on the completed value of the home. Cost: $1,500 to $4,000 per year of construction, depending on project value. This policy ends when the CO is issued and a standard homeowner's policy begins.
Your general contractor must carry general liability insurance covering property damage and personal injury arising from construction activities. Minimum $1M per occurrence; $2M per occurrence is better for larger projects. Request a certificate of insurance naming you (the homeowner) as an additional insured. Verify the certificate is from the insurer directly, not just a document from the GC.
Arizona requires employers to carry workers' compensation insurance for all employees. Your GC must carry WC coverage. If a worker is injured on your property and the GC doesn't have WC coverage, you may be exposed to liability. Verify WC coverage before construction begins.
Consider purchasing an umbrella liability policy during construction. Construction sites have inherent accident risk. An umbrella policy provides additional liability coverage above your home insurance and auto insurance limits, typically $1M to $5M for $200 to $500/year. Inexpensive peace of mind during a period of elevated liability exposure.
One of the most important legal concepts in Arizona construction is the mechanic's lien. Under ARS §33-981 et seq., contractors, subcontractors, and material suppliers who provide labor or materials to your property have the right to file a lien on your property if they are not paid — even if you paid your GC for their work.
How this creates risk: If your GC collects payment from you for subcontractor work but then doesn't pay the subcontractors, those subs can file mechanic's liens on your property. These liens must be satisfied before you can sell or refinance. You could pay twice for the same work.
Protective measures:
TSMC's $65 billion Fab 21 investment in Deer Valley (north Phoenix, 85085) is creating unique opportunities — and challenges — for buyers interested in custom home building in the surrounding area. The 85083, 85085, 85086, and 85087 zip codes have seen significant land price appreciation since TSMC's announcement, as both builders and individual lot buyers compete for the limited available residential land in this corridor.
For TSMC employees or contractors considering a custom build near their workplace:
Between fully custom construction and production builder homes, there is a middle path: Build-on-Your-Lot (BOYL) programs offered by production builders. Several Phoenix metro builders will build one of their standard production plans on a lot you own or purchase separately.
How BOYL works:
BOYL advantages over full custom:
BOYL limitations:
Meritage Homes, DR Horton, and several regional builders have offered BOYL programs in the Phoenix metro. Contact me to find out which builders currently have active BOYL programs in your target area.
| Phase | Standard Duration | Key Milestones | Risk Factors |
|---|---|---|---|
| Lot search and purchase | 1–4 months | Identify lot, due diligence, offer, close | Competitive lot market; caliche discovery; utility issues |
| Design and engineering | 2–6 months | Architectural drawings, structural engineering, geotech report | Revision cycles; design scope changes |
| Permit submission and review | 1–5 months | Submit to building department; plan check approval | Plan check comments requiring revisions; jurisdiction backlog |
| Construction loan closing | 30–60 days from application | Lender underwriting, appraisal, closing | Incomplete documentation; appraisal shortfall |
| Construction: Foundation | 3–6 weeks | Excavation, forms, rebar/PT cables, pour, cure | Weather delays; caliche excavation difficulty |
| Construction: Framing | 4–8 weeks | Wall framing, floor system, roof structure, sheathing | Lumber supply delays; labor availability |
| Construction: Mechanical | 3–6 weeks | Plumbing, electrical, HVAC rough-in; inspections | Subcontractor scheduling; inspection backlog |
| Construction: Interior | 3–6 months | Drywall, paint, flooring, cabinets, countertops, fixtures | Material lead times; custom item delays |
| Punch list and CO | 2–4 weeks | Final inspection, punch list completion, Certificate of Occupancy | Inspection items; jurisdiction processing time |
| Landscaping | 2–6 weeks | Grading, irrigation, plant installation | Plant availability; irrigation design |
| Total (typical) | 14–27 months | Decision to move-in | Weather, design changes, and supply chain are primary schedule risks |
Timeline is a general estimate. Actual duration varies by project complexity, jurisdiction, GC capacity, and market conditions. Complex or large homes take longer; simple plans on clear lots can be faster. Build schedule confidence intervals should be wide — plan for the high end of the range.
Land transactions are frequently misunderstood as simple compared to home purchases. In practice, vacant lot due diligence is more complex because the lot has no improvements that can be inspected — everything important about a lot's suitability is invisible without research.
When I represent buyers in lot purchases, here is the due diligence framework I apply:
This due diligence is standard on every lot transaction I handle. Buyers who purchase lots without this research regularly encounter expensive surprises: flood zone elevation requirements, missing utilities, caliche excavation costs, or zoning incompatibility with their intended design. Thorough due diligence before purchase prevents these surprises.
If you're considering a lot purchase in the Phoenix metro for custom home construction, call or text Ryan Moxley at (480) 227-9143. I represent lot buyers across the metro from the TSMC corridor in north Phoenix to the emerging communities of the outer East and West Valley.
| Feature | Construction Loan (C2P) | Traditional Purchase Mortgage |
|---|---|---|
| Purpose | Fund construction of new home | Purchase existing finished home |
| Disbursement | Draws based on construction milestones | Lump sum at closing |
| Payments during loan term | Interest-only on drawn balance during construction | P&I from first payment |
| Interest rate | Higher (prime + 1–3%) | Standard market rate |
| Loan term | 12–24 months (construction); then converts to 30-yr | 15 or 30 years |
| LTV maximum | 80% of total project cost (land + construction) | 80–97% of purchase price |
| Down payment | 20% of total project cost minimum | 3–20% depending on loan type |
| Appraisal type | "Subject to completion" (based on plans) | Standard comparable sales appraisal |
| Lender inspections | Required at each draw milestone | None after closing |
| Documentation required | Plans, specs, GC credentials, budget, plus standard mortgage docs | Standard mortgage documentation |
| Origination complexity | High — specialized underwriting | Standard — widely available |
| Lender availability | Specialized — not all lenders | Wide availability |
Construction loans (C2P) require more documentation, have more complex underwriting, and are available through fewer lenders than standard purchase mortgages. Start your lender search 60–90 days before you plan to close on your lot.
Most Arizona down payment assistance programs (including ADOH HOME Plus) are designed for standard home purchases, not construction loans. However, buyers planning a custom build should be aware of a few financing strategies:
If you own your lot free and clear, many construction lenders will credit the land's appraised value toward the required 20% down payment. Example: If your lot is appraised at $200,000 and your total project budget is $900,000, the land equity contributes $200,000 toward the $180,000 required down payment — potentially eliminating additional cash down payment requirement (subject to lender policies and the specific project budget). This is one reason buying land early can be financially strategic: building land equity before the construction loan process begins.
Eligible veterans and active-duty service members can use VA loan entitlement for construction-to-permanent financing. VA C2P loans allow qualified borrowers to build with zero down payment. The construction phase interest may be financed into the loan balance. Not all VA-approved lenders offer C2P products, so find a VA-specialist construction lender. Given the significant military presence at Luke AFB (West Valley) and Davis-Monthan (Tucson), this is a meaningful option for Arizona veteran buyers.
FHA offers a one-time close construction loan product with 3.5% down payment (for borrowers with 580+ credit). FHA C2P has stricter property standards (the builder must be FHA-approved, among other requirements) but enables construction with lower down payments than conventional C2P. FHA loan limits in Maricopa County for 2026 match the conforming limit at $806,500 for single-family homes.
Arizona's climate creates seasonal timing considerations that affect construction schedules and costs:
Arizona summer temperatures regularly exceed 110°F during the day. Concrete pouring must be scheduled in early morning (before 7am for large pours) to avoid rapid water evaporation from the mix, which weakens the cure. Many concrete contractors add chilled water or ice to their mix during summer pours. Framing crews often work 4am to 10am shifts during peak summer. This affects GC scheduling and overall timeline. Factor in slightly slower summer production when estimating construction schedule.
Arizona's monsoon season brings intense, localized thunderstorms that can dump 1 to 3 inches of rain in an hour. On a construction site with disturbed soil and open framing, monsoon storms can cause erosion, flooding of the foundation, and damage to materials stored on site. Ensure your GC has a storm water management plan for monsoon season. Builder's risk insurance covers storm damage, but prevention is better than a claim.
October through May (especially October through December and February through April) are Arizona's most favorable construction months. Mild temperatures, no monsoon risk, and comfortable outdoor working conditions enable maximum productivity. If you have scheduling flexibility, targeting a spring construction start (March to May) puts your most critical framing and mechanical work in the good-weather window.
Moving into a brand-new custom home is exciting, but the first year brings specific experiences that long-term custom homeowners know to expect:
Custom homes — like all new construction — undergo settlement during the first year as the structure adjusts to its foundation, concrete continues to cure and minor shrinkage occurs, and seasonal temperature cycling expands and contracts materials. Hairline cracks in drywall at corners, door frames, and ceiling joints are normal and expected. Document them, and address them at your one-year warranty walk-through with your GC.
New HVAC systems run at their peak performance specification for the first full summer season as filters, belts, and mechanical components seat. Check your filter monthly for the first year (construction dust is significant). Program your thermostat for efficient operation from the start — new homeowners sometimes run their AC at extreme cold settings, stressing the system.
New desert landscaping requires intensive irrigation support for the first 6 to 24 months while plants establish root systems. Your drip irrigation system should be programmed for a heavy schedule initially and gradually backed off as plants mature. Expect some plant loss in the first summer; factor in replacement plantings in your post-construction budget.
Custom homes often have new appliance brands and system configurations that take time to learn. Read all appliance manuals. Understand your HVAC control system. Know where your main water shutoff is located. Learn your electrical panel layout. Keep all warranty documentation and contact information in a central file.
Building a custom home in Arizona is one of the most rewarding real estate decisions you can make — if you approach it with thorough preparation, the right professional team, and realistic expectations for timeline and cost variability. This guide has given you the framework. The next step is a conversation about your specific project.
Call Ryan Moxley at (480) 227-9143. I've guided buyers through land acquisition in the Phoenix metro across all submarkets — from the TSMC corridor in north Phoenix to rural custom lots in Cave Creek and Rio Verde. Let's find your lot and get your project started.
Building a custom home in Arizona triggers several tax events and considerations that buyers should understand before breaking ground:
Arizona levies a Transaction Privilege Tax (TPT, Arizona's version of a sales tax) on certain construction activities. Contractors who are owner-builders (acting as their own GC) may be subject to TPT on the value of the home constructed. This is separate from standard property taxes and can represent a meaningful cost. Consult with a licensed Arizona CPA before starting an owner-builder project to understand your TPT exposure. Licensed GCs who are building on your behalf handle their own TPT compliance.
Your property tax assessment begins when the County Assessor adds the completed structure to the assessed value of your property. This typically occurs in the assessment year following your Certificate of Occupancy. Expect a jump in property taxes in the first full tax year after completion as the land-only assessment increases to include the structure. Budget this increase: a $700,000 structure at Arizona's effective property tax rate of approximately 0.6% to 0.8% adds approximately $4,200 to $5,600 per year in annual property taxes.
The federal capital gains exclusion ($500,000 married / $250,000 single) applies to your custom home upon sale, provided it was your primary residence for 2 of the last 5 years. The 2-year clock starts when you occupy the home (CO date), not when you started building. Plan accordingly if you're considering a future sale within 5 years of moving in.
Interest paid on a construction loan is deductible as mortgage interest during the construction period under IRC §163, subject to the same limits as standard mortgage interest deduction (up to $750,000 of acquisition debt). Consult your tax advisor for your specific situation, particularly during the construction phase when interest-only payments may be larger than in the permanent mortgage phase.
The TSMC investment ecosystem has created unique dynamics for custom home builders in the north Phoenix/Peoria area that deserve specific discussion:
TSMC's fab construction (and the accompanying commercial development) represents one of the largest construction projects in Arizona's history. The fab itself employed thousands of specialty construction workers. Residential GCs and specialty subcontractors in the 85083/85085 area compete for the same skilled tradespeople as the commercial and industrial projects in this corridor. This competition can drive up construction labor rates and extend scheduling lead times for residential builds in the immediate TSMC vicinity.
Mitigation: Hire a GC with established subcontractor relationships who can commit crews in advance. Consider starting construction in the spring (March/April) before summer monsoon season and before the fall construction surge. Work with a GC who has a written subcontractor commitment for your project schedule.
The Phoenix metro's overall construction volume in 2026 is high. Framing lumber, concrete, and specialty construction materials are subject to supply and demand dynamics at the regional level. Building material costs in high-demand markets like the TSMC corridor can run 5% to 15% higher than in less active markets. Your GC's bid should reflect current (not historical) material pricing.
Residential land in the 85083/85085 zip codes has appreciated significantly since TSMC's fab announcement. Buyers who purchased lots in this area in 2022 to 2024 are sitting on meaningful land appreciation. The acceleration in TSMC hiring and Phase 2 construction activity in 2026 suggests continued demand pressure on land in this corridor. Buyers interested in land here should move with appropriate urgency — waiting for prices to come down is not likely in this demand environment.
The rapid development of the TSMC corridor means infrastructure (roads, utilities, commercial services) is being built simultaneously with residential development. Some areas that were rural in 2022 now have full utility services; others are still pending. Verify utility availability for your specific lot on a current basis — the situation changes quarterly. Your buyer's agent should verify utility availability confirmation from APS/SRP and the relevant municipality in the month before you close on any lot.
Here is the complete sequenced checklist for a Phoenix metro custom build, from initial concept through move-in:
Custom home building in Arizona is one of the most rewarding paths to homeownership available — for the right buyer, with the right preparation. If you're considering this path, I'm Ryan Moxley, REALTOR® at My Home Group, and I specialize in helping buyers navigate land acquisition in the Phoenix metro. Call or text (480) 227-9143 to start your conversation.
| Comparison Point | Lender A (Example) | Lender B (Example) | Why It Matters |
|---|---|---|---|
| Construction phase rate | Prime + 1.5% (variable) | Prime + 1.0% (variable) | Affects interest cost during 12-18 month build |
| Permanent rate lock | 6.75% 30yr fixed at closing | 6.50% 30yr fixed at closing | 0.25% diff = $90/mo on $600K loan; $32,400 over 30 yr |
| Rate lock term | 12 months | 18 months | If build runs long, 12-mo lock may expire — re-lock fees |
| Re-lock fee | 0.25% of loan | 0.125% of loan | $1,500 vs. $750 on $600K loan if lock expires |
| Origination fee | 1.0% ($6,000 on $600K) | 0.75% ($4,500 on $600K) | Upfront cost difference; reflects lender profitability vs. rate |
| Draw inspection fee | $250 per draw (6 draws = $1,500) | $150 per draw (6 draws = $900) | Modest but real cost; 6-8 draws typical |
| Contingency reserve requirement | 10% of construction budget | 15% of construction budget | 5% difference on $500K budget = $25K more cash at closing |
| Land equity credit | Yes, at appraised value | Yes, at purchase price (lower of) | If land appreciated, appraised value credit is better |
| Draw processing time | 7-10 business days | 3-5 business days | Faster draws mean less GC cash flow stress |
| GC approval requirements | AzROC license + references | AzROC license + 3 yr financial statements | More stringent GC requirements can narrow your contractor options |
Always obtain a full Loan Estimate from each lender on the same day. Compare APR (not just note rate) and total loan costs for an apples-to-apples comparison. This table illustrates comparison methodology — actual lender terms vary.
Under ARS §33-1101, Arizona homeowners have a homestead exemption that protects up to $400,000 in primary residence equity from most unsecured creditors. This exemption applies automatically to your primary residence — no filing required. It does not protect against your mortgage lender, HOA liens, or property tax liens, but it does protect against judgment creditors (personal injury lawsuits, credit card debt, medical debt) who might otherwise attach a lien to your property.
For buyers with business risk or professional liability exposure (doctors, contractors, business owners), the homestead exemption is an important asset protection consideration. Putting significant equity into an Arizona primary residence is a legitimate asset protection strategy within the legal limits of the homestead exemption.
Arizona's Right to Repair statute (ARS §12-1361) provides statutory warranties for residential construction defects. Even in custom builds where you hired the GC and specified the construction, these statutory minimums apply:
The Right to Repair statute requires you to give the GC (or responsible party) written notice of defects and an opportunity to inspect and offer repair before you can file a lawsuit. This notice and response procedure is mandatory — courts have dismissed construction defect claims that did not follow the ARS §12-1361 notice protocol. Document all defects in writing, send notice by certified mail, and retain copies of all communications.
Building a custom home in the Phoenix metro is not the right decision for every buyer. It requires significantly more capital upfront (20% minimum down), more time (14 to 27 months), more active management during construction, and more tolerance for uncertainty than buying a production builder home or a resale. For buyers who need a specific feature set, a specific lot location, or who simply want the deep satisfaction of creating a home exactly to their specifications, the custom path delivers what no production builder can.
If you are at the stage of researching your options — comparing custom versus production new construction versus resale — I encourage you to have a conversation before making any financial commitments. Understanding the full picture of what each path involves helps you choose the right one for your life, not just the one that looks best in a brochure.
Ryan Moxley · REALTOR® at My Home Group · (480) 227-9143 · moxleysellsaz@gmail.com · ADRE SA643872000