Building a home from the ground up is one of the most exciting — and financially complex — paths to homeownership. The construction process involves contractors, timelines, draw schedules, inspections, and a financing structure that most buyers have never encountered before.
Most people don't realize there are two fundamentally different ways to finance a new build. Understanding the difference before you sign a construction contract can save you thousands of dollars and significant stress.
The Traditional Two-Close Construction Loan
The conventional approach to new construction financing involves two separate loan transactions. The first is a construction loan — a short-term, interest-only line of credit that funds the build in phases as work is completed and inspected. Once construction is finished, you close on a second, permanent mortgage to pay off the construction loan and establish your long-term financing.
Two closings means two sets of closing costs, two rounds of underwriting, and two opportunities for something to go wrong. It also means your permanent rate isn't locked until the second closing — so if rates move during the 6–12 months your home is being built, you bear that risk.
How One-Time Close Works
A one-time close construction loan (also called a construction-to-permanent loan) combines both transactions into a single closing before construction begins. You're underwritten once, you close once, and your permanent mortgage terms — including your interest rate — are locked at that closing.
During construction, the loan functions like a traditional construction line of credit. Draws are disbursed to your builder as each phase is completed and verified. Once construction is complete and the certificate of occupancy is issued, the loan automatically converts to your permanent mortgage. No second closing. No second set of fees. No re-qualification.
You pay origination fees, title, and closing costs once — not twice. On a $500,000 build, duplicate closing costs on a two-close structure can add $8,000–$15,000 in total transaction costs.
Your permanent rate is locked before ground breaks. If rates rise 1.5% during a 10-month build, you're protected. That's not hypothetical — it happened to a lot of buyers between 2021 and 2023.
With a two-close structure, you must qualify for the permanent mortgage at the end of construction. A job change, a credit event, or a shift in market conditions during the build can derail the second closing. One-time close eliminates that risk entirely.
What Loan Types Support One-Time Close?
One-time close programs are available across multiple loan types, which makes them accessible to a broad range of buyers:
- Conventional — available through Fannie Mae guidelines with standard down payment requirements
- FHA — 3.5% down, broader credit flexibility, available on owner-occupied primary residences
- VA — zero down for eligible veterans and active-duty service members building a primary residence
- USDA — zero down for eligible rural properties
Not every lender offers one-time close programs on all of these loan types. This is where lender selection matters — and where having access to 120+ lenders gives me the flexibility to match your build scenario to the right program.
What to Watch For
One-time close loans come with a few constraints worth knowing upfront. The builder typically must be licensed and approved by the lender. The construction timeline is usually limited to 12 months, though some programs extend to 24 months. And because you're locking a permanent rate before construction begins, the rate may carry a small premium over a traditional purchase mortgage — a tradeoff most borrowers find worthwhile given the certainty it provides.
The documentation is also more involved than a standard purchase. The lender needs to underwrite both you as a borrower and the construction project itself — including plans, specifications, contractor credentials, and budget. Coming in organized makes a significant difference in how smoothly the process runs.
Is It the Right Fit?
If you're building a custom home or purchasing from a builder who allows construction financing, a one-time close structure is almost always worth evaluating. The rate certainty and elimination of dual closing costs are compelling advantages that compound over the life of the loan.
If you're considering a 203K renovation loan for a fixer-upper, the structure is different but the principle is similar — combining acquisition and improvement financing into a single transaction. Both deserve a dedicated conversation before you commit to a purchase contract or construction agreement.
Planning a new build?
Let's talk through the financing structure before you sign with a builder. The decisions made at contract stage have a direct impact on your total cost.