What Is a Construction Loan?
A construction loan is short-term financing that pays for building a home — the land (if you don't already own it), the materials, and the labor — before a finished house exists to serve as collateral. Because the lender is funding something that isn't built yet, construction loans work differently from a standard purchase mortgage: money is released in stages as work is completed, you typically pay interest only during the build, and the loan either converts into a permanent mortgage when the home is finished or is paid off by a new one.
In Arizona, construction lending is especially active. New-build communities across the Phoenix metro — Queen Creek, Buckeye, Maricopa, San Tan Valley — plus custom builds in areas like Cave Creek, Prescott, and Flagstaff mean thousands of Arizona borrowers each year need financing for a home that doesn't exist yet. The good news: you have more program options today than at any point in the last decade, including government-backed one-time close loans with very low down payments.
How Construction Loans Work: Draws & Interest
Instead of wiring the full loan amount at closing, the lender releases funds in draws tied to construction milestones — foundation poured, framing complete, roof on, mechanicals installed, drywall finished, final completion. Before each draw, the lender sends an inspector to verify the work is actually done, then releases that portion of the budget to the builder.
During construction you typically make interest-only payments, and only on what's been drawn so far — not the full loan amount. Early in the build, when only the foundation draw has funded, your payment is small; it grows as the project progresses. Some one-time close programs build an interest reserve into the loan so you make no payments at all until the home is complete.
One-Time Close vs. Two-Time Close
This is the biggest structural decision you'll make, and it drives your costs, your rate, and your risk.
| Feature | One-Time Close (OTC) | Two-Time Close (TTC) |
|---|---|---|
| Closings | One — construction + permanent loan close together | Two — construction loan first, permanent mortgage after completion |
| Closing costs | One set | Two sets |
| Rate | Locked before construction begins | Permanent rate set at completion (market risk) |
| Re-qualification | None — you qualify once | Must qualify again at completion |
| Flexibility | Less — terms fixed at first closing | More — you can shop the permanent loan and capture lower rates |
| Best for | Borrowers who want certainty and one qualification | Borrowers betting rates will fall, or whose income is rising |
The one-time close has become the default recommendation for most Arizona borrowers because it removes two dangerous variables: rate risk during a year-long build, and the risk of failing to re-qualify if your job, credit, or debt picture changes mid-construction. The two-time close still makes sense if you strongly expect rates to drop before completion, or if you want maximum flexibility on the permanent loan. If you're weighing this decision, our Arizona refinancing guide covers what a post-completion refinance actually costs — because an OTC borrower can always refinance later if rates fall, which weakens the main argument for the TTC.
Construction Loan Programs in Arizona
Conventional Construction-to-Permanent
The workhorse of custom-home financing. Typically 5%–20% down depending on lender and credit profile, with loan amounts up to the 2026 conforming limit of $832,750 in every Arizona county — and jumbo construction programs above that for high-end builds in Paradise Valley, Scottsdale, and north Phoenix. Strongest pricing goes to 720+ credit and lower debt-to-income ratios.
FHA One-Time Close
Backed by HUD/FHA, this program lets you build with just 3.5% down and credit scores as low as 620 with many lenders. FHA county loan limits apply, which makes this program best suited to entry and mid-priced builds. Mortgage insurance applies just like a standard FHA purchase loan — see our full breakdown at todduzzell.com/fha-loans.
VA One-Time Close
Eligible veterans and active-duty service members can build with 0% down and no monthly mortgage insurance — genuinely the strongest construction financing in the market. The builder must be VA-registered, and the standard VA loan occupancy and funding fee rules apply. Full VA details at todduzzell.com/va-loans.
USDA One-Time Close
For builds in USDA-eligible rural areas — which in Arizona includes more territory than most people expect (parts of Coolidge, Florence, Wickenburg, and much of rural Arizona) — a USDA single-close construction loan offers 0% down for income-qualified borrowers. Check eligibility basics in our Arizona USDA loan guide.
Hard Money / Private Construction Financing
Investors and fix-to-build borrowers who can't fit conventional guidelines sometimes use private construction financing — faster and more flexible, but at meaningfully higher rates and shorter terms. See our Arizona hard money guide for when that trade-off makes sense, and our non-QM loan guide if your income documentation is the obstacle rather than the project.
Requirements: Credit, Down Payment & Builder Approval
| Requirement | Conventional | FHA OTC | VA OTC |
|---|---|---|---|
| Down payment | 5%–20% | 3.5% | 0% |
| Credit score (typical) | 680+, best terms 720+ | 620+ | 620+ |
| Debt-to-income | 45% or lower | Up to ~50% with strength | Flexible with residual income |
| Builder approval | Required — AZ ROC licensed & insured | Required | Required + VA builder ID |
| Appraisal | "Subject-to-completion" appraisal based on plans, specs & budget | ||
| Contingency reserve | Typically 5%–10% of construction budget | ||
Three things trip up Arizona construction borrowers most often: an unlicensed or under-documented builder (verify at the Arizona Registrar of Contractors), a construction contract missing a detailed cost breakdown, and underestimating the cash needed for items outside the loan — like design deposits and upgrades paid directly to the builder. Not sure where your numbers land? Run them through the calculator suite at todduzzell.com, including the construction loan estimator, and review how much house you can afford before signing a builder contract.
What It Costs to Build in Arizona
Build costs vary enormously by finish level and location, but as broad 2026 planning ranges: production-style builds in metro Phoenix commonly run roughly $150–$250 per square foot for the structure itself, while true custom homes frequently run $250–$400+ per square foot before land. Add the lot, site work (Arizona's caliche soil and desert grading can surprise people), utility connections or well/septic in rural areas, permits, and a contingency cushion.
Because the loan is based on a subject-to-completion appraisal, your budget needs to hold up against what the finished home will actually be worth. Over-building for a neighborhood — a $900,000 custom build on a street of $500,000 homes — is one of the most common ways construction deals fall apart in underwriting.
If down payment is your constraint rather than income, note that most Arizona down payment assistance programs are designed for existing-home purchases; see the Arizona DPA guide for what programs like Home Plus actually cover before assuming they'll apply to a build.
The Construction Loan Process, Step by Step
- Get pre-qualified — know your max budget before talking to builders. Start at todduzzell.com/pre-qualification.
- Secure your lot — purchase it with the construction loan, or bring land you already own as equity.
- Choose your builder — licensed, insured, ROC-registered, with a detailed fixed-cost contract.
- Submit plans, specs & budget — the lender underwrites the project as much as the borrower.
- Subject-to-completion appraisal — the home is valued as if already built.
- Close — once for OTC; the construction phase begins.
- Draws & inspections — funds release as milestones are verified, typically 5–7 draws.
- Completion & conversion — certificate of occupancy issues, and the loan converts to (or is replaced by) your permanent mortgage.
Pros & Cons of Arizona Construction Loans
✓ Advantages
- Build exactly the home you want, where you want it
- 0% down (VA) and 3.5% down (FHA) one-time close options
- One closing = one set of costs and no re-qualification risk
- Land you own counts as down payment equity
- Interest-only payments during the build, only on funds drawn
- New-build = no deferred maintenance, modern energy efficiency
✗ Disadvantages
- More documentation and stricter underwriting than a purchase loan
- Rates typically run somewhat higher than standard purchase rates
- Cost overruns beyond the contingency come out of your pocket
- Builder delays can force costly loan extensions
- Budget and appraisal must align — over-building kills deals
- Fewer lenders offer construction programs, so shopping matters more
Frequently Asked Questions
How much down payment do I need for a construction loan in Arizona?
It depends on the program. VA one-time close allows 0% down for eligible veterans. FHA one-time close requires 3.5% down. Conventional construction loans typically require 5%–20%. If you already own your lot, the land's appraised equity can often count toward your down payment.
What credit score do I need?
Most conventional programs look for 680+, with the best terms at 720+. FHA one-time close can go as low as 620 with some lenders; VA typically wants 620+. Construction lending is more conservative than standard purchase lending because the collateral doesn't exist yet.
Do I make payments while my home is being built?
On most construction loans you make interest-only payments during the build — and only on the amount drawn so far. Some one-time close programs roll an interest reserve into the loan so you make no payments until the home is complete.
Does my builder need to be approved?
Yes. Arizona construction lenders require a licensed, insured contractor registered with the Arizona Registrar of Contractors. The lender reviews the builder's license, insurance, references, and financials. Owner-builder programs exist but are rare and carry stricter terms.
Can I use land I already own toward the loan?
Yes — if you own your lot free and clear, its appraised value typically counts as equity toward your down payment. Many Arizona borrowers with paid-off land qualify with little or no additional cash down.
What happens if construction costs go over budget?
Lenders require a 5%–10% contingency reserve built into the loan. Overruns beyond that come out of pocket, because the loan amount is locked at closing — which is why a detailed, realistic builder contract matters so much.
Related Arizona Loan Resources
- Renovation Loans in Arizona — buying a fixer instead of building? FHA 203(k), HomeStyle & more
- Refinancing in Arizona — what a post-completion refi costs
- Arizona Down Payment Assistance
- Hard Money Loans in Arizona — investor & bridge construction options
- USDA Loans in Arizona — 0% down in eligible rural areas
- Construction Loans overview at ToddUzzell.com
- Arizona First-Time Buyer Guide
- CFPB: Owning a Home — federal consumer guidance
About the Author
Todd Uzzell is a licensed Arizona mortgage lender (NMLS #1525192) with Starboard Financial (NMLS #156931), based in Gilbert, AZ. Todd has helped Arizona families finance new builds, custom homes, and everything in between across the Phoenix metro and greater Arizona. Call or text 480-330-1724 or visit todduzzell.com.
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