Buying New Construction — Should I Use the Builder's Lender?

The short answer: get both quotes, because the incentive is real and so is the cost of taking it. Builders frequently offer thousands in closing-cost credits — sometimes a rate buydown — for using their affiliated lender. That money is genuine. It is also generally priced into the transaction somewhere, and the loan itself may carry terms that give some of it back over time.

The comparison people skip is the honest one: the incentive against the total cost of the loan, not the incentive against nothing.

Two other things matter more on new construction than on a resale, and they catch almost everybody: what happens to your rate across a long build, and the fact that you are being underwritten twice — once now, and again shortly before you close, months later.

I'm Jeff Moran, a mortgage broker in Bluffton, South Carolina, originating since 1996. New construction is a large share of the market across the states I lend in, and the process differs from a resale in ways nobody explains at the design center.

The builder's lender, weighed honestly

Start by acknowledging what is true: builder incentives are frequently substantial, sometimes larger than any rate advantage an outside lender can offer. Taking one is often the right call.

What makes it a decision rather than a gift:

The incentive is usually conditioned on using their lender, which means you are being paid to stop shopping. That is a legitimate offer, and it is worth knowing that is the trade.

Compare the whole loan, not the credit. A credit toward closing costs paired with a higher rate is a trade of money now against money every month for thirty years. Sometimes the credit wins. Sometimes the rate does. It is arithmetic, and it is entirely knowable.

Get an outside quote anyway. Even where you intend to take the incentive, a second quote tells you what the loan is actually worth. That takes an afternoon, costs nothing, and is the only way to know whether the credit is generous or merely visible.

You do not have to be adversarial about this. Ask the builder whether the incentive survives if you use another lender — sometimes part of it does, and nobody volunteers that.

The rate problem on a long build

A resale closes in weeks. New construction can close in months, sometimes many.

Rate locks have terms. A standard lock does not stretch across a nine-month build, which means one of a few things:

• An extended lock, available for longer periods, usually at a cost.
• A float-down feature, where you lock early and get some benefit if rates improve. These have conditions and are not free.
• Floating, and taking whatever the market gives you when the home is finished.

There is no universally right answer, and anybody who tells you otherwise is guessing at the future. What matters is that you make it a decision rather than a default, and that you know what your lock actually covers. When to lock is the wider frame.

The specific trap: a lock that expires before the home is ready, discovered late, with an extension fee attached.

You get underwritten twice

This is the one people are least prepared for.

The file is approved now. Then, shortly before closing — potentially many months later — everything is verified again. Employment. Income. Credit. Assets.

Which means the ordinary advice about not disturbing your file applies for a much longer stretch than usual:

• Do not change jobs without raising it first. What that does to a file can be significant, particularly with variable pay.
• Do not open new credit. Furniture, appliances and a new vehicle for the new garage are the classic three, and they arrive at exactly the wrong moment.
• Do not move money around without keeping records. Everything still has to be traceable.
• Keep paying everything on time. A late payment in month seven can undo an approval from month one.

Nine months is a long time to hold still. Knowing that at the start is what makes it manageable.

Upgrades, deposits and what they actually cost

Design-center money behaves differently from what people assume.

Your deposit and upgrade payments are generally not part of the loan — they are cash you put in along the way, and they are frequently non-refundable. They also do not automatically become equity, because value depends on the appraisal rather than on what you spent.

Upgrades may not appraise for what they cost. That is not a criticism of the builder; finishes and land do not appreciate identically. If the appraisal comes in below the contract price, the gap is generally yours to cover.

Budget the deposits as separate money from the down payment and closing costs, the same way closing costs are separate from the down payment on any purchase.

The appraisal happens at the end

On a resale the appraiser walks through a finished house. On new construction the appraisal is frequently done from plans and specifications, then updated when the home is complete.

That means the value question is partly settled late. It is usually fine, and it is worth knowing that "the appraisal came back" may happen far closer to closing than you expect.

What I see go wrong

• Taking the incentive without ever getting a second quote. You may still take it — you will simply know what it was worth.
• Not asking whether part of the incentive survives with an outside lender.
• Buying furniture on credit before closing. The single most common self-inflicted problem in new construction.
• A lock that expires before the home is finished.
• Assuming upgrades become equity. The appraiser decides value, not the invoice.
• Changing jobs during the build without mentioning it.

An illustration, so the shape is clear

Numbers below are invented to show the mechanism, not a quote.

A builder offers $12,000 toward closing costs for using their lender. That is real money and it feels decisive.

The outside quote comes back with a rate a quarter point lower and no credit. On a $400,000 loan, a quarter point is roughly $60 a month — call it $720 a year.

So the $12,000 credit is worth more for roughly the first sixteen years, and less after that, if you keep the loan and the rate difference holds.

Which means the honest answer depends on how long you keep the loan. Somebody planning to move or refinance within a few years should probably take the credit. Somebody settling in for the long run may not.

That is a five-minute calculation, and it is the one nobody runs before signing at the design center.

What to do now

Get a second quote before you commit to the builder's lender. Not to be difficult — to know what you are being offered.

Run your scenario — no credit pull, no account, nobody calls you — and bring the builder's incentive terms and the estimated completion date. Those two facts drive the whole comparison, including which lock strategy makes sense.

And then hold still for the build. It is the least glamorous advice in this article and the one most likely to save your closing.

Nothing here is a loan approval, a denial, or a commitment to lend. Program guidelines and lock terms differ and change, and what applies to a specific purchase is worth confirming rather than assuming.

Common questions

Do I have to use the builder's preferred lender?

No. Builders frequently offer incentives conditioned on using their affiliated lender, and those incentives are often substantial, but the choice of lender is yours. It is worth asking whether any part of the incentive survives with an outside lender, since some builders will extend a portion and rarely volunteer that.

Is the builder's closing cost credit worth taking?

Sometimes, and it depends on the whole loan rather than the credit alone. A credit paired with a higher rate trades money now against money every month, so the answer turns largely on how long you expect to keep the loan. A second quote from an outside lender is what makes the comparison possible, and getting one costs nothing.

How do rate locks work on new construction?

Standard locks generally do not stretch across a long build, so the options are typically an extended lock at a cost, a lock with a float-down feature under defined conditions, or floating and accepting the market when the home is complete. The specific trap is a lock expiring before the home is ready and an extension fee arriving late in the process.

Can I lose my mortgage approval during construction?

Yes, which is why employment, income, credit and assets are all verified again shortly before closing — potentially many months after the initial approval. Changing jobs, opening new credit, or missing payments during the build can affect the approval that existed at the start. It is manageable when you know at the outset that the file has to stay stable for the full build.

Do upgrades add value to my new home?

Not automatically, and not necessarily dollar for dollar. Value is determined by the appraisal rather than by what upgrades cost, and finishes do not appreciate the way land and square footage do. Deposits and upgrade payments are also generally cash outside the loan and frequently non-refundable, so they belong in the budget as separate money.

When does the appraisal happen on new construction?

Often in two stages: an initial valuation based on plans and specifications, then a final inspection or updated appraisal once the home is complete. That means the value question is partly settled close to closing rather than early, which is worth expecting rather than being surprised by.