I had a client last month who was dead set on a resale home in Chandler until she toured a new-construction community advertising 3.99%. Her first question was: “Why would I ever pay 6.65% on a resale home when the builder is basically giving away free money?” It’s a fair question, and the honest answer is: it depends on math most buyers never actually run.
The Rate Comparison Everyone Sees
Walk into almost any Valley new-home sales office right now and you’ll see a rate advertised well below market — often in the high 3s or low 4s, against resale rates sitting closer to 6.5-6.75%. On a $500,000 loan, that gap alone can be $700-$900 a month in payment. That’s the number builders want you to see first, and it’s real. What it doesn’t show you is everything wrapped around it.
Read the Fine Print: Temporary vs. Permanent
The single biggest thing buyers miss is whether that headline rate is temporary or permanent. A lot of builder incentives are 2-1 buydowns — you get a rate 2 points below the note rate in year one, 1 point below in year two, then the loan resets to its actual rate (which might be close to market) for the remaining 28 years. If you’re planning to refinance or move before that reset, a temporary buydown can be a great deal. If you’re planning to stay long-term and the “3.99%” you saw advertised was only for 12 months, you need to know what the real, permanent rate is before you fall in love with the payment.
Some builders do offer genuine permanent-rate buydowns through their in-house or preferred lender, bought down with discount points the builder pays for out of their own incentive budget. That’s a different animal, and it can be a legitimately great deal — but you still need to compare it against what the home actually costs.
Compare APR, Not Just the Headline Rate
The interest rate is only part of the borrowing cost. APR bakes in points, lender fees, and other financing costs into one number, and it’s the honest way to compare two loans. A builder’s captive lender might advertise a lower rate but charge more in points or fees to get there — sometimes the same points buyers would’ve paid on the open market anyway, just rolled into the deal differently. Always ask for a Loan Estimate on both the builder’s financing and at least one outside lender, and compare APR side by side, not sticker rate.
The Price Premium Is Real
New construction in metro Phoenix routinely carries a premium over comparable resale homes in the same submarket — sometimes 5-10% or more for a similar square footage and lot size, before you even add upgrades. Builders build that incentive cost into their pricing model; the “free” rate buydown isn’t actually free, it’s baked into what you’re paying for the house. Comparable resale homes a few years old, sometimes with upgrades the original owner already paid for and you get at no extra cost, can be significantly cheaper per square foot in the same school zone.
Run the comparison on price per square foot for genuinely similar homes — same age range doesn’t matter as much as same size, same lot type, same finish level — in the same immediate area. That’s the number that tells you whether the “deal” on rate is offsetting a real premium on price.
Don’t Forget HOA and CFD Costs
New-build communities across Chandler, Gilbert, Queen Creek, and the Southeast Valley very often carry Community Facilities District (CFD) assessments — a public-financing mechanism builders use to fund infrastructure like roads, parks, and utilities, repaid by homeowners as a line item on the property tax bill for 20-30 years. On top of that, new communities usually carry higher HOA dues than older, established neighborhoods, at least in the early years while amenities are being built out and maintained.
A CFD assessment can add hundreds of dollars a year, sometimes more, on top of your existing property taxes — and it’s easy to miss because it doesn’t show up in the sales price or the advertised payment estimate. Ask the builder directly for the CFD balance and annual assessment amount, and get the HOA’s current budget and dues schedule before you sign.
Always Bring Your Own Agent
Here’s the part that surprises new-construction buyers the most: the salesperson sitting behind the desk at the model home works for the builder, not for you. They’re required to represent the builder’s interests in the transaction. If you walk in without your own buyer’s agent and register that day, most builders will not let you add one later — you’ve effectively waived representation.
Registering with your own agent on your very first visit costs you nothing (the builder pays the commission out of the same budget either way, and it typically doesn’t change your price), but it means someone is reviewing the purchase contract, the CFD disclosures, the lot premium, and the upgrade contract with only your interests in mind. I’ve caught things in builder contracts — construction timelines with no real recourse if delayed, upgrade change orders that weren’t in the original quote — that a first-time new-construction buyer would have had no way to know to ask about.
So Which Is Actually Cheaper?
It genuinely depends on your specific numbers, and that’s not a dodge — it’s the honest answer. A permanent builder rate buydown on a fairly priced new home, with modest HOA and CFD costs, can absolutely beat a comparable resale home at market rate. But a temporary 12-month teaser rate on a home carrying a 8% price premium and a hefty CFD assessment can end up costing you more over 5-7 years than a resale home at a higher note rate with no premium and no CFD.
The way to actually know is to run both scenarios side by side: total monthly payment (principal, interest, taxes, insurance, HOA, and any CFD line item), what the rate resets to if the buydown is temporary, and the total price difference against a genuinely comparable resale home. I do this comparison with clients regularly and it takes about twenty minutes once we have real numbers from both sides.
The Bottom Line
The builder’s rate is real, but it’s one number in a bigger equation. Before you commit to new construction over resale — or resale over new — get the permanent rate (not just the promotional one), the actual APR, the CFD and HOA numbers, and a genuine price-per-square-foot comparison to similar resale homes nearby. And whichever way you lean, register with your own buyer’s agent on day one so someone is reviewing that contract for you, not just for the builder.
If you want help running the real numbers on a specific new-construction community versus resale options nearby, call me at (480) 201-3700 or reach out at https://mikecaruso.idxbroker.com/idx/contact. If you’re not sure where to start on affordability first, my post on how much house you can afford in Phoenix is a good place to begin, and if you’re deciding between a rate buydown and a straight price cut on either type of home, I break that down in Rate Buydown vs. Price Reduction.
Mike Caruso | HomeSmart Elite, Chandler AZ | License SA540586000 | 22+ years | 500+ homes sold
FAQ
Is a builder’s advertised interest rate always temporary? Not always, but often. Many builder promotions are 2-1 or 1-0 temporary buydowns that reset to a higher permanent rate after one or two years. Always ask your loan officer to show you both the temporary payment and the permanent, post-buydown payment before you decide.
Does a CFD assessment show up in the home’s purchase price? No. A Community Facilities District assessment is a separate, ongoing charge tied to the property tax bill, not part of the sales price. Ask the builder for the current CFD balance and annual payment amount in writing before you sign.
Do I have to use the builder’s lender to get their advertised rate? Often the best rate incentives are tied to using the builder’s preferred or in-house lender, but you’re never required to. It’s worth getting a competing quote from an outside lender to compare APR, since sometimes the builder’s incentive is worth more than an outside lender could offer, and sometimes it isn’t.
