Construction Loans in Arizona 2026: How to Finance a Custom Build in Phoenix and Scottsdale

A construction loan in Arizona is a short term loan that funds your build in stages, then either converts to a permanent mortgage or gets paid off by one. Most borrowers here put down 10% to 25% of total project cost, though VA one time close programs allow zero down for eligible veterans. If you are looking at a lot in North Scottsdale, Cave Creek, or the far edges of the Phoenix metro and thinking about building instead of buying, this is the financing conversation you need to have before you sign anything with a builder.

We get this question a lot at Pillar Mortgage Group, and it usually comes from the same place: buyers who have toured resale after resale, cannot find the floor plan they want, and start wondering whether building is the smarter play. Sometimes it is. Sometimes the numbers say buy the existing house. Here is how to tell.

How a construction loan actually works

A construction loan does not hand you a lump sum at closing. It funds in draws as the build hits milestones, and you only pay interest on the money that has been drawn.

So your payment in month two, when the foundation is barely poured, is small. By month nine, when the house is framed, roofed, and drywalled, that interest payment has grown a lot. Most Arizona construction terms run 9 to 18 months depending on the scope of the project and the builder. The lender orders inspections before releasing each draw, which is why your builder needs to be organized. A builder who cannot produce a clean budget and a realistic schedule will slow your loan down more than any underwriting issue will.

One time close vs two time close

A one time close construction to permanent loan means you close once, at the start, and the loan automatically converts to a standard mortgage when the certificate of occupancy is issued. Two closings means you close on the construction loan first, then refinance into permanent financing when the build is done.

One time close is usually the better structure for Arizona borrowers. You lock your terms up front, you pay one set of closing costs, and you are not exposed to whatever rates happen to be doing 14 months from now. The tradeoff is that fewer lenders offer it and the rate is sometimes slightly higher than a two close structure. Two closings can work if you expect rates to fall and you are comfortable requalifying later. That is a real bet, not a technicality, because your income and credit have to hold up a second time.

What you need to qualify in 2026

Construction lending is stricter than a standard purchase, mostly because the collateral does not exist yet.

Expect a credit score in the 680 and up range for conventional construction, though FHA one time close programs go down to 580 with 3.5% down. Down payment on conventional construction typically runs 10% to 25% of total project cost, which is land plus build. VA one time close is zero down for eligible veterans, and it is genuinely one of the best products in the entire market if you qualify. Lenders also want to see reserves after closing, a debt to income ratio that works with the finished payment and not the interest only draw payment, and a licensed general contractor with a track record. If you already own the lot free and clear, that equity usually counts toward your down payment, which is a big deal for buyers who bought raw land in Rio Verde or Queen Creek a few years ago.

Is building cheaper than buying in Phoenix right now?

Usually not on price alone, but that is not the whole calculation. The median sale price in Phoenix sat around $465,000 in recent months per Redfin, and metro inventory has kept climbing, which means resale buyers have real leverage right now. Building rarely beats a discounted resale on cost per square foot.

Where building wins is fit. You get the lot, the layout, the garage depth, the casita, and the finishes you want, and you avoid inheriting a 1998 roof and a failing HVAC. If you are searching for land or comparing new builds against resale options, Arizona Luxury Property Search is a good place to see what is actually on the market across Scottsdale and the Valley.

Frequently asked questions

Can I buy the land and build later with the same loan?
Sometimes. Some one time close programs let you roll the lot purchase into the construction loan, which means one closing for both. If you are buying land with no build timeline yet, that is a lot loan instead, which is a different product with higher down payment requirements, usually 20% to 35%.

Do I make payments during construction?
Yes, but they are interest only on the drawn balance. If you are also paying rent or an existing mortgage during the build, budget for carrying both. That double payment period is the thing that catches most Arizona borrowers off guard.

What happens if the build goes over budget?
You cover the overage out of pocket in most cases. Lenders typically require a contingency reserve in the budget, often 5% to 10%, exactly for this reason. Change orders after the loan closes are the usual culprit, so lock your finishes early.

Can I act as my own general contractor?
Almost never on a financed build. Nearly every construction lender requires a licensed, insured GC who is not the borrower. Owner builder programs exist but they are rare and the terms are worse.