Building a new home or buying one already standing? The financing looks nothing alike, and most people figure that out the hard way, usually after they've already fallen in love with a lot.
So, what's the difference between construction loans and mortgages? A construction loan funds a build in stages. A mortgage funds a finished home in a single lump sum at closing. The construction loan is short-term, interest-only during the build, and priced higher than a regular mortgage. The mortgage is long-term, fully amortizing, and usually the cheapest money you'll ever borrow.
Construction loan rates are usually higher, too. In Q3 2025, the average rate on a 30-year fixed mortgage was 6.89%, while the average rate on a single-family construction loan ran 8.34%, a spread of about 1.45 percentage points.[1] On a $500,000 build, that's roughly $4,000 to $7,000 more in interest you'll pay during a 12-month construction period.
Here's what you need to know about how these loans differ and which is right for you.
🛡️ Why you should trust our advice
This guide was reviewed by Steve Nicastro, Managing Editor at Best Interest Financial. We interviewed and quoted Bernie Frascarelli, VP and Loan Officer at Best Interest Financial (NMLS #938329). Bernie's perspective on construction underwriting, builder approvals, and rate locks is drawn from BIF's active pipeline, not from a textbook.
We rely on primary sources for the data in this article: the National Association of Home Builders' AD&C Financing Survey for rate data, the NAHB and U.S. Census Bureau for construction permit and starts data, Fannie Mae's selling guide for single-close construction-to-permanent rules, HUD for FHA construction loan requirements, and Bankrate for closing cost benchmarks. Every external claim is footnoted.
Conflict of interest disclosure: Best Interest Financial originates both construction-to-permanent loans and traditional mortgages. We have a financial interest in helping you become our customer. That's also why we'd rather you understand how each product actually works before you apply, even if you end up going with someone else.
Construction loans vs. mortgages: Key differences
The main difference is what the loan is for, when the money shows up, and how long you're repaying it.
A construction loan finances a home that doesn't exist yet. The lender provides money in stages tied to construction milestones (called draws), you make interest-only payments on the balance drawn, and the loan typically runs 6 to 18 months. When the home is finished, the loan either gets paid off, refinanced into a mortgage, or automatically converts to a permanent mortgage if you took out a construction-to-permanent loan.
A mortgage finances a finished home. The lender hands the seller the full purchase price at closing, you take ownership, and you start making principal-and-interest payments on day one. Terms typically run 15 or 30 years. Most mortgages are fixed-rate, but adjustable-rate mortgages (ARMs), interest-only mortgages, and government-backed loans like FHA, VA, and USDA are all forms of "mortgage" too.
| Construction loan | Mortgage | |
|---|---|---|
| What it finances | New builds, major renovations | Already built homes |
| Loan types | Construction-only; construction-to-permanent | Fixed-rate; ARM; government-backed |
| Costs covered | Land, labor, materials; sometimes permits and design fees | Home purchase price |
| Funds paid out | Typically in 4-6 stages (draws) | Lump sum at closing |
| Collateral | Land and under-construction home | Completed home |
| Interest rates | Fixed or variable, depending on the loan; generally about 1% higher than a mortgage but depends on the lender | Fixed or variable; usually lower rates |
| Fees | May pay closing costs twice with construction-only loan; fees for inspections and draws | Around 3-5% of the purchase |
| Repayment | Interest-only, then converts into mortgage or is paid off | Monthly principal + interest |
| Term length | Short-term (6–18 months) | Long-term (15–30 years) |
| Down payment | Typically 20% or more; land equity may apply toward down payment and some construction loans require lower down payments | 3-20%, depending on the loan |
| Credit score | Typically 680+, but depends on the lender and can be lower with government-backed loans | Varies by loan type |
What each loan covers
Construction loans and mortgages don't compete for the same job. They cover almost mutually exclusive use cases.
A construction loan can fund the combination of land and the build that goes on it. Most lenders, BIF included, don't write a construction loan against vacant land you have no immediate plans to build on. A pure land loan or lot loan is a different product. The construction loan releases money as your builder finishes phases: foundation, framing, mechanicals, drywall, and so on. The loan also pays builders, suppliers, and subcontractors directly via the draw schedule, which is why you don't get the money in a lump sum.
| What you want to do | Construction loan | Mortgage |
|---|---|---|
| Build a new home on land you already own | ✅ | ❌ |
| Buy land and build on it at the same time | ✅ | ❌ |
| Pay construction costs (labor, materials, permits) | ✅ | ❌ |
| Pay builders and subcontractors via draw schedule | ✅ | ❌ |
| Finance major structural renovations | ✅ (203(k) or specialty construction loan) | ❌ Limited (cash-out refinance or home equity products are more common) |
| Buy a move-in-ready resale home | ❌ | ✅ |
| Buy a builder's completed spec home | ❌ | ✅ |
| Refinance an existing home | ❌ | ✅ |
| Buy pure vacant land with no immediate build plan | ❌ | ❌ (use a land loan or lot loan) |
A mortgage covers a different list: buying a move-in-ready home, refinancing an existing one, or financing a builder's completed spec home. It doesn't cover the cost of land you haven't built on yet, doesn't pay subcontractors, and doesn't release money in stages.
The construction loan can also stretch into territory mortgages won't touch, like major structural renovations (think tearing the house down to the studs) and certain commercial property builds.
How a construction loan works
Most borrowers think of a construction loan as a single product, but there are really two flavors, and the difference matters.
Construction-only loans
A construction-only loan funds just the build, then comes due at the end of the term (typically 12 months). Rates are usually variable, often pegged to Prime, and you pay interest-only on the funds you've drawn. When construction wraps up, you have to either pay the loan off in cash (rare) or refinance it into a permanent mortgage (much more common). That means a second full mortgage application, a second appraisal, a second underwriting cycle, and a second set of closing costs.
The trade-off: construction-only loans give you flexibility to shop for the best permanent mortgage rate when the build finishes, but you take the risk that rates rise or your finances change during the build.
Construction-to-permanent loans (single-close)
A construction-to-permanent loan (sometimes called a single-close or one-time-close loan) combines the build financing and the permanent mortgage into one closing. You sign one set of documents at the start.
During the build, you make interest-only payments on draws. When the home is finished and gets its certificate of occupancy, the loan automatically converts to a fully amortizing 30-year mortgage at the rate you locked at the beginning.
Per Fannie Mae's selling guide, the construction period on a single-close construction-to-permanent loan can't exceed 12 months in any single period (18 months total), and the lender underwrites the entire loan based on the permanent financing terms upfront.[2]
The trade-off: single-close loans eliminate the refinance risk and the second set of closing costs, but you're committing to a rate at the start of construction (often 12 months before you'll actually use the permanent loan), which can be a problem if rates fall during the build. Some programs include a one-time float-down provision to address this.
Draw schedule and interest-only payments
Both flavors share the same payment mechanics during the build. The lender releases money in stages as your builder hits milestones. A typical draw schedule has four to six stages: foundation, framing, mechanicals (electrical, plumbing, HVAC), drywall and interior finishes, and final completion. Each draw is preceded by an inspection.
Your payments during the build are interest-only on the cumulative balance drawn, not the full loan amount.
Say you take out a $400,000 construction-to-permanent loan at 7.5%. If only $100,000 has been drawn after the foundation phase, your monthly interest payment is roughly $625, not $2,500. As more money is drawn through framing and mechanicals, the interest payment ramps up. By the time the home is complete and the full $400,000 is drawn, you're paying about $2,500 a month in interest until the loan converts to a permanent mortgage.
Most borrowers are also still paying rent or an existing mortgage during the build, which is why lenders stress-test your full carrying cost when they underwrite the loan.
During construction, you make interest-only payments on drawn funds. For example, on a $400,000 balance with a 7.5% interest rate, your monthly interest-only payment would be $2,500 if the full $400,000 balance was drawn. Generally, since the funds are released in phases, your payments won’t start off that high when you first take the loan. But they’ll increase as you continue to borrow for the build.
Vanessa Lemieux, a Florida realtor with Royal Shell Real Estate, notes that most people pay rent or a mortgage on their current home, plus interest-only payments on the construction loan.
“Alternatively, [with] a spec home, you’re buying a brand-new finished product that is typically move-in ready. In this scenario, most times, there isn’t a crossover of timelines where you would be making both payments.”
How a traditional mortgage works
A mortgage is the loan most people picture when they think about buying a home, and its mechanics are much simpler than those of a construction loan.
You provide your lender with pay stubs, W-2s, tax returns, bank statements, and a written explanation for any large or unusual deposits. The lender pulls credit, orders an appraisal, and stress-tests your debt-to-income ratio. If you're putting less than 20% down, you'll typically pay private mortgage insurance (PMI) on top of your principal, interest, taxes, and insurance.
Once approved, you set a closing date. At closing you make your down payment, pay closing costs (typically 2 to 5% of the purchase price), sign the loan documents, and walk out with keys. The next month, your first monthly payment is due.[3]
Most mortgages are fixed-rate, meaning your principal and interest payment never changes for the life of the loan. But ARMs, interest-only products, and balloon mortgages all exist and behave differently. Fixed isn't a defining feature of the mortgage category, it's a feature of the most common mortgage product.
On a 30-year fixed mortgage of $400,000 at 6.5%, you'd pay around $2,528 a month in principal and interest. Property taxes, homeowners insurance, HOA fees, and PMI (if applicable) stack on top of that.
» Run the numbers: Use our mortgage calculator to estimate monthly payments on a traditional mortgage.
Is a construction loan right for you?
Right for a construction loan
- You already own the land or are buying land specifically to build on
- You can't find existing inventory in your market within your budget or footprint
- You have strong cash reserves to absorb cost overruns and the carrying cost of rent or an existing mortgage plus construction interest
- Your builder is licensed, insured, and has a clean record (most lenders maintain approved builder lists)
Wrong for a construction lopan
- You're stretching to qualify on income and reserves alone, with no buffer for change orders
- Your timeline doesn't allow for a build (you need to be in a home in under six months)
- Your builder isn't on a lender's approved list and doesn't have a strong financial history
- You're a first-time homebuyer who needs FHA, VA, or USDA down payment assistance and won't qualify for a construction-specific government-backed product
Matt Schwartz, mortgage broker and co-founder of VA Loan Network, puts the qualifying bar simply: "When you're getting a construction loan, you're qualifying to borrow money to complete a project," he says.
His warning to clients: watch the draw schedule and the contingency budget. "When construction takes longer than expected, the borrower pays the extra costs, not the bank."
Is a traditional mortgage right for you?
Right for a traditional mortgage
- You want to move in within 30 to 60 days
- You want a fixed monthly housing payment locked in at closing
- You qualify for first-time homebuyer or down payment assistance programs and want to use them
- You're buying a builder's completed spec home or a quick move-in product (no construction loan needed)
- You want the lower rate (mortgages typically run about 1 to 1.5 percentage points below construction loans)
Wrong for a traditional mortgage
- You want a fully custom build on a lot you've already chosen
- The existing housing inventory in your market doesn't include what you actually want to buy
- You want to finance major structural renovations (a renovation-specific loan or 203(k) is a better fit)
Your options for first-time homebuyer or down payment assistance programs are generally more limited with construction loans, which often require higher down payments, variable rates during the build, and stricter qualification standards. If predictability, affordability, and faster move-in timelines matter more to you than customizing your home from the ground up, a traditional mortgage is the simpler and less risky path.
What construction loans cost vs. mortgages
Construction loans cost more than mortgages in three ways. Understanding the layers is the difference between budgeting for $30,000 in surprises and budgeting for none.
Rate premium
Construction loan rates ran roughly 1.45 percentage points above 30-year fixed mortgage rates in the third quarter of 2025, based on NAHB AD&C Financing Survey data.[1]
BIF's own construction-to-permanent loans currently price in line with that benchmark, though the premium narrows on borrowers with stronger files (higher FICO, more reserves, lower CLTV).
Closing costs (and sometimes twice)
A traditional mortgage's closing costs typically run 2 to 5% of the purchase price, per Bankrate's analysis of LodeStar data.[3] A construction-only loan can run that bill twice (once on the construction loan, once on the permanent mortgage refinance).
A construction-to-permanent loan, by combining both into a single closing, cuts that second set of costs and is usually the cheaper path when you account for total fees.
Inspection and draw fees
Every draw is preceded by an inspection to confirm the builder has actually completed the work tied to that disbursement. Each inspection runs $150 to $300, depending on market and lender. On a typical 5-draw schedule, that's another $750 to $1,500 of fees most borrowers don't see coming until they read the loan estimate carefully.
Extended rate lock fees (if your build runs long)
Standard construction-to-permanent rate locks run 12 months. Extended locks of 15 or 18 months can be purchased upfront for an additional 0.25% to 0.50% of the loan amount, with some lenders offering 30-, 60-, or 90-day extensions at 0.125% to 0.25% per 30 days.
Important note: You may not qualify for a mortgage when your house is complete if your finances or the market changes. In 2023, almost 1.3 million households were priced out of the market when rates increased just a quarter point.[4] Always discuss different scenarios with your lender and how you can prepare for them to make sure it all goes smoothly.
What kills construction loan applications at underwriting
Construction loans get denied or stalled for a small, repeating set of reasons. Bernie's pre-flight checklist surfaces all of them in the first week, which is why catching them early matters.
1. Unapproved or under-capitalized builders. Lenders maintain approved-builder lists. If your dream builder isn't on the list, expect two to four weeks of underwriting on the builder before they ever touch your file. Some builders never get approved at all. Before you sign a build contract, ask your lender to vet the builder.
2. Future-value appraisal coming in short. Construction loans are sized against the "as-completed" appraised value, not the contract price. If the appraiser values the finished home 8% below the build contract, the lender will require the borrower to bring more cash, the builder to cut scope, or the deal dies.
3. Contingency reserve too thin. Most lenders require a 5% to 10% contingency built into the build budget for change orders, material price increases, and weather delays. Borrowers who try to keep the budget tight to make their qualifying ratios work get caught when the first change order hits.
4. Carrying cost stress test. Underwriting tests whether you can carry your current rent or mortgage plus interest-only construction payments plus the future permanent mortgage payment. If you fail that test, the deal stalls regardless of how well-built your build budget is.
5. Title or lien issues on the land. Construction loans record against the land. A mechanics lien from an earlier failed start, unpaid taxes, or unresolved easement disputes will block the loan until cleared.
The single most effective thing you can do as a borrower is bring the build deal to your lender before you commit to a builder or a contract. A construction loan officer who runs files weekly will spot a non-starter in three days. Without that pre-check, you can lose weeks of momentum and earnest money chasing a deal that was never going to fund.
Builder-financed homes: A third path
With builder-financed homes, the builder owns the land and assumes all risks during a home’s construction until the project is completed—no construction loan required. This option is popular in large residential developments.
I bought my home this way, selecting the lot, floor plan, and finishes from the builder’s options. We put down $10,000 at signing and another $10,000 within 30 days. Once complete, we closed on our mortgage with the deposits credited. The process took 6.5 months and required minimal oversight from us.
Greg Healing, an eXp realtor specializing in builder-financed homes at Babcock Ranch, a master-planned community in Florida, notes that interest in custom builds is waning, with more buyers choosing spec homes (move-in-ready new construction) or quick move-ins (homes with customizable final touches).
“Builders working toward sales quotas are heavily discounting homes, which is why buyers typically choose spec homes or quick move-ins over building from the ground up,” Healing says.
The discount usually shows up as a rate buydown through the builder's preferred lender rather than as a price cut on the sticker.
» Use our mortgage calculator to estimate monthly payments on a traditional mortgage.
How a construction loan and mortgage compare on qualifying
Lenders look at the same three things for both products: credit, ability to repay, and funds available. The bar is just higher on construction loans.
| Factor | Construction loan | Mortgage |
|---|---|---|
| Minimum FICO | 680 (conventional), 580 (FHA 203(b) construction-to-permanent) | 580 (FHA), 620 (most conventional), no published minimum (VA/USDA but most lenders require 620+) |
| Down payment | 20%+ (conventional), 3.5% (FHA) | 0% to 20% depending on loan type |
| Debt-to-income limit | 43% typical; up to 50% with strong compensating factors | 43% typical conventional; up to 56.9% FHA with compensating factors |
| Cash reserves | 2 to 6 months of carrying cost (current housing + construction interest + future mortgage) | Often 0 to 2 months depending on product |
| Builder approval required | Yes | No |
| Future-value appraisal | Yes (as-completed) | No (current appraised value) |
| Construction plans, blueprints, budget | Required | N/A |
The other thing the table doesn't capture: construction underwriting is a story problem, not a math problem. Two borrowers with the same FICO and DTI can land on opposite sides of an approval depending on the builder, the lot, the plans, and the file presentation. That's why working with a lender who actually writes construction loans (versus a lender who writes one or two a year) matters.
Ready to talk to a loan officer?
Choosing between a construction loan and a mortgage comes down to whether you’re financing a home’s build or purchasing an existing one, your financial standing, and your budget.
At the end of the day, there are so many variables that go into deciding which option is right for you. The best way to decide is to meet with a loan officer who can dive in on your finances and goals and present you with which options would make the most sense. Get started with a quote from Best Interest Financial in 60 seconds.
FAQ about construction loans and mortgage loans
Are construction loans better than mortgages?
Neither product is "better." A construction loan funds a build you control from the ground up. A mortgage funds a home that already exists. The better product is the one that matches what you're trying to do.
Do I have to put 20% down on a construction loan?
Not always. Conventional construction loans typically require 20% or more, but FHA construction-to-permanent loans can be done with as little as 3.5% down if you meet credit and income guidelines.[5] VA construction loans are also available with $0 down for eligible service members and veterans. If you already own the land, your land equity can usually count toward the down payment requirement.
Is it hard to qualify for a construction loan?
Yes, relative to a traditional mortgage. Conventional construction loans typically require a 680+ FICO, 20%+ down, two to six months of cash reserves, and an approved builder. FHA construction-to-permanent loans loosen the credit and down payment bar but add the requirement that your builder be FHA-approved.
How long does construction loan approval take?
A clean construction loan file usually takes 30 to 60 days to underwrite and close. Builder approval can add 2 to 4 weeks if your builder isn't already on the lender's list, which is why most experienced construction LOs run the builder check on day one.
Why would a construction loan be denied?
The most common reasons: builder not approved or under-capitalized; the future-value appraisal came in below the build budget; the borrower's contingency reserve was too thin to satisfy underwriting; the borrower can't carry rent or an existing mortgage plus construction interest; or title or lien issues on the land.
Can I refinance a construction-only loan into a mortgage with a different lender?
Yes. You're not locked into refinancing with the original construction loan lender. That said, the original lender is usually the path of least resistance because they already have your file. Shop at month nine of a 12-month construction loan to give yourself room to switch if better terms are available elsewhere.
Does FHA, VA, or USDA offer construction loans?
FHA offers a 203(b) construction-to-permanent loan and the 203(k) renovation loan. VA offers a construction loan for eligible veterans (though many lenders don't originate it). USDA offers a Single Close Construction-to-Permanent Loan in eligible rural areas. All three have stricter builder and property requirements than conventional construction loans.