The Construction-to-Permanent Loan Master Guide (2026 Edition)

A construction-to-permanent loan — also called a single-close or one-time close (OTC) loan — finances the building of a new home and then automatically converts into a regular long-term mortgage once construction is finished. You apply once and close once, instead of taking out a short-term construction loan and then separately refinancing into a mortgage.

The loan runs in two phases. During the construction phase (typically 12–18 months), the lender releases funds to your builder in stages, and you pay interest only on the money drawn so far. When the home is complete, the loan converts to the permanent phase — a standard 15- or 30-year mortgage with full principal-and-interest payments — with no second application or closing. That single-close structure, and the rate certainty it brings, is the whole reason borrowers choose it.

Who it's for

This loan is built for people building a home rather than buying an existing one: buyers with land (or buying land) who are constructing a custom or semi-custom house and want to avoid financing the build and the mortgage as two separate transactions. It's the most popular construction-financing path precisely because it removes the biggest risk of building — having to requalify for a mortgage partway through. If you're buying a finished home from a production builder, you usually don't need one of these at all; the builder finances construction and you take a standard mortgage on the completed home.

The arc, at a glance

The defining feature of this loan is its two-phase life, joined by an automatic conversion. Understanding the handoff is the key to understanding the product.

Phase 1 — Construction

• Funds release in stages (draws). The lender doesn't hand over the full amount at closing. It releases money to your builder in scheduled draws — foundation, framing, mechanicals, finishes — each tied to an inspection confirming the work is done.
• You pay interest only, on what's drawn. If your loan is $400,000 but only $120,000 has been drawn, you pay interest on $120,000 — which keeps payments manageable while the house goes up.
• Interest reserve vs. monthly payments. Some programs let you finance the construction-phase interest into the loan (an interest reserve) rather than paying it out of pocket; others require monthly interest payments during the build. Ask which applies — it affects your cash needs while building.
• The phase is time-boxed. Construction typically runs 12–18 months, and the loan is structured around that window.

Phase 2 — Permanent

• Automatic conversion. When construction finishes and passes final inspection, the loan converts to a permanent mortgage on its own — no new application or second closing.
• Full payments begin. You shift from interest-only to full principal-and-interest on the whole balance, amortized over the 15- or 30-year term.

Most one-time-close programs lock or establish your permanent rate at or before closing — often before you break ground — though lock policies vary (some lenders let the rate float, or offer a float-down, closer to completion). The signature benefit is rate certainty: once locked, if market rates rise during your 12–18 month build, your rate doesn't move. (The trade-off: if rates fall, you're locked in too, unless you refinance later.)

Because the lender is financing a home that doesn't physically exist yet — with no finished house to fall back on, and assuming the risk that construction may not complete as planned — the rate runs above a standard mortgage. In 2026 that premium is roughly 1–2 percentage points over a comparable conventional rate, though it varies with lender, credit, and lock length; the extended 12–18 month locks these loans require can themselves add a fraction of a point.

Illustrative ranges, not quotes. In early-to-mid 2026, conventional construction-to-permanent rates have generally run in the high-6% to high-8% range for qualified borrowers, versus lower pricing on a standard conventional mortgage. Government-backed one-time-close options (FHA, VA, USDA) can price lower for those who qualify.

What drives your rate

• Credit score — the biggest lever; 720+ earns the best pricing, and the gap to a 680 file can be 0.5–1%.
• Down payment — more equity in the project lowers the rate; 25% down often prices better than 20%.
• Lock length — the longer the rate lock needed to cover your build, the more it can cost; confirm the extension terms if the project may run long.
• The lender — construction lending is specialized and portfolio-driven, so pricing and draw handling vary widely. Shop lenders who build these regularly.

The biggest structural decision in construction financing is whether to use one loan or two. A construction-to-permanent loan is the single-close path; the alternative is a stand-alone construction loan you refinance into a mortgage separately.

For most borrowers in an uncertain-rate market, single-close wins: the rate certainty and the elimination of requalification risk outweigh the flexibility of chasing a lower rate later. Two-close makes sense mainly if you have strong conviction that rates will fall meaningfully during your build, or your project is complex enough that you want to keep the permanent financing open. One nuance: single-close means no second full underwriting, but many lenders still re-pull credit and verify your final package at conversion — especially if the build runs long — so keep your finances steady through completion. The quiet danger of two-close is heavier: a job change, income dip, or credit slip mid-build can sink your permanent financing after the house is already up.

Construction underwriting looks at more than you: the lender evaluates your credit and finances, the builder's qualifications, the realism of the budget and timeline, and the projected value of the finished home. Expect the lender to verify the builder's license, experience, and insurance (general liability and workers' comp), and to require builder's-risk (course-of-construction) coverage on the project. A fixed-price contract is preferred; some lenders accept cost-plus contracts but apply extra scrutiny.

Using land you already own

One of the most common questions from prospective builders: "I own my lot — can I use it instead of cash?" Often, yes. Because the loan is sized on total project cost (land + construction), the equity in land you already own frequently counts toward your down payment — sometimes satisfying part or all of it. If you're still buying the lot, many programs let you roll the land purchase into the loan. How much your land contributes depends on its current appraised value and how long you've owned it, so confirm early, since it directly changes your cash to close.

You don't receive the loan as a lump sum. The lender disburses it against progress, which protects both of you — money is released only as real work gets done.

• Draws are milestone-based. Funds release in stages that track construction — typical draw points include land/lot, foundation, framing, mechanical systems, drywall and finishes, and a final draw at completion, though the exact schedule varies by lender.
• Each draw is inspected. Before releasing a draw, the lender (via an inspector) verifies the work matches the request. This is why a lender who knows local builders and appraisers keeps a project moving — slow draw approvals stall the crew.
• Interest accrues only on released funds. Your construction-phase payment rises as more is drawn, and covers interest only — principal repayment starts after conversion.
• Conversion requires proof of completion. Before the loan converts, expect a final completion verification (often Form 1004D) and evidence of a certificate of occupancy.

Because draw handling makes or breaks a build's timeline, how a lender manages inspections and disbursements can matter more than a fraction of a point on the rate. A stalled draw that idles your framers for two weeks costs more than a slightly better quote saved.

One-time-close construction financing comes in several flavors — the right one depends on your credit, down payment, and loan size.

• Conventional OTC. The standard path — 680+ credit, 20–25% down. Many are structured to meet agency guidelines after conversion, though some lenders hold them in portfolio.
• FHA / VA / USDA OTC. Government one-time-close programs price lower and allow far smaller down payments for those who qualify — VA can reach 0% down for eligible veterans, USDA for eligible rural builds. They aren't offered by every lender and can be more prescriptive on builder approval and documentation, so ask specifically about "one-time close."
• Jumbo construction. For total project costs above your county's conforming limit (baseline $832,750 in 2026, up to $1,249,125 in high-cost areas), expect 700–740+ credit, larger down payments, and deeper reserves.

A few related paths, depending on your situation: if you already own a home with substantial equity and are renovating rather than building from the ground up, a HELOC may be simpler. For project costs in jumbo territory, the jumbo loan guide covers the added bars. And if you're building or renovating as an investor to sell rather than to live in, short-term fix-and-flip or bridge financing fits that goal better than a construction-to-permanent loan.

• Underbudgeting. Overruns are routine. Without a 15–20% contingency, a mid-build shortfall forces a slow, costly request for more funds — or stalls the project.
• Underestimating change orders. Mid-build upgrades and design changes usually need lender approval and revised plans, and can require additional cash. Fold likely changes into your contingency thinking rather than assuming the original budget holds.
• Two-close requalification risk. With a stand-alone loan, a job change, income dip, or credit slip during the build can sink your permanent financing after the house is finished. Single-close removes the second full underwriting.
• Forgetting you're locked if rates fall. Single-close protects you when rates rise — but if they drop during the build, you keep your higher set rate unless you refinance (a new closing and cost).
• Choosing a lender on rate alone. Draw speed and construction expertise shape your build more than a fraction of a point. A cheap lender who's slow on draws can cost you far more in delays.
• An unvetted or underqualified builder. The lender underwrites the builder too. A builder who can't satisfy the lender's requirements, or who runs over schedule, jeopardizes the whole loan.
• Ignoring the payment jump at conversion. Budget for the full principal-and-interest-plus-escrow permanent payment from the start, not the low interest-only construction payment.

Do I close once or twice?

Once. A construction-to-permanent (single-close / one-time close) loan uses a single application and a single closing that covers both the construction phase and the permanent mortgage. The loan converts automatically when the home is finished — no second closing and no second full underwriting.

Can I use land I already own toward the down payment?

Often, yes. Because the loan is sized on total project cost (land + construction), the equity in land you already own frequently counts toward your down payment — sometimes covering part or all of it. If you're still buying the lot, many programs let you roll the purchase into the loan. The amount your land contributes depends on its appraised value, so confirm with your lender early.

Is my interest rate set before construction starts?

Usually. Most one-time-close programs lock or establish your permanent rate at or before closing, and it holds for the whole build (locks commonly run 18–24 months). If market rates rise during construction, your rate doesn't change; if they fall, you'd need to refinance to capture the lower rate. Some lenders offer a float-down option — worth asking about in a falling-rate market.

Can I be my own builder?

Usually not. Most lenders require a licensed, approved builder. Owner-builder construction loans exist but are rare and significantly harder to qualify for — lenders view a self-managed build as much higher risk. If you're set on it, ask specifically for owner-builder programs and expect stricter terms.

What happens if I want to make changes during construction?

Change orders are common, but they usually require lender approval and revised plans, and can require additional cash if they raise the budget. Significant changes may trigger a new appraisal or re-review, so keep your lender in the loop and lean on your contingency rather than assuming changes are free.

How much do I need to put down?

Typically 20–25% of the total project cost (land plus construction) on conventional programs — and owned land can offset part of that. Government one-time-close options (VA, USDA) can go much lower for eligible borrowers.

What do I pay during construction?

Interest only, and only on the funds drawn so far — not the full loan amount. Some programs finance that interest into the loan (an interest reserve) instead of billing it monthly. Full principal-and-interest payments begin after the loan converts to permanent.

What if construction takes longer than expected?

Rate locks are generally sized for the build (often 18–24 months) to absorb normal delays. Significant overruns can require a lock extension or re-lock, and lenders may re-verify your credit and finances before conversion — so confirm your lender's policy on timelines up front.

Single-close or two-close — which is better?

Single-close suits most borrowers: one closing, a set rate, and no requalifying. Two-close (a stand-alone construction loan you refinance) mainly makes sense if you expect rates to fall meaningfully during the build or your project is complex — at the cost of a second closing and requalification risk.

Construction-to-permanent terms vary by lender and program — the figures here reflect typical 2026 ranges; confirm specifics with your lender. Background and program rules:

• CFPB — Consumer Mortgage Resources (how mortgages and construction financing work; borrower protections)
• Fannie Mae Selling Guide — B5-3.1-02 (single-closing construction-to-permanent conversion, appraisal, and completion rules)
• USDA — Single Family Housing Guaranteed Loan Program (rural one-time-close / single-close construction guidance)
• FHFA — Conforming Loan Limit Values (the baseline $832,750 / high-cost $1,249,125 thresholds that separate conforming from jumbo construction)