Yes, a construction loan can turn into a mortgage, and whether it happens automatically depends on the structure you chose at closing. A single-close construction-to-permanent loan converts on its own once the home is finished and verified complete, with no second application. A two-close (or stand-alone) construction loan does not convert; you apply for a separate mortgage that pays off the construction debt, and you close a second time. Picking between the two before you break ground shapes your costs, your rate risk, and how much paperwork you face at the end of the build.
Single-Close Loans Convert Automatically
A single-close construction-to-permanent loan wraps the construction financing and the long-term mortgage into one transaction from the start. You close once, agree to both sets of terms up front, and the loan converts to a standard amortizing mortgage when construction is complete.1Fannie Mae. Conversion of Construction-to-Permanent Financing: Single-Closing Transactions Truth in Lending Act rules let lenders treat the two phases as a single transaction, which is the legal basis for the structure.2eCFR. 12 CFR 1026.17 – General Disclosure Requirements
The conversion itself usually works one of two ways. Some lenders attach a construction loan rider to the permanent loan documents that simply expires when the building phase ends. Others use a modification agreement that formally changes the loan from a construction line of credit into a fixed- or adjustable-rate mortgage.1Fannie Mae. Conversion of Construction-to-Permanent Financing: Single-Closing Transactions Either way, you do not sign a new note.
The biggest advantage is cost. One set of closing costs, one title fee, one appraisal at the front end. You also lock in your permanent interest rate before construction begins, which removes the risk of rates climbing during a 12- to 18-month build.
Two-Close Loans Require a Second Mortgage Application
A two-close construction loan treats the building phase and the permanent mortgage as separate transactions. You close on the construction loan first. Once the home is finished, you apply for a new mortgage that pays off the construction debt.3Fannie Mae. B5-3.1-03, Conversion of Construction-to-Permanent Financing: Two-Closing Transactions A modification agreement cannot be used to update the original note. You sign a new promissory note and new security instrument, and the permanent loan is processed as a refinance of the construction debt.4Fannie Mae. Two-Closing Construction to Permanent Financing Transaction Process
That means two sets of closing costs, two rounds of underwriting, and a second title search. The tradeoff is flexibility. You are not locked into permanent terms at the start, so you can shop for the best mortgage rate available after the home is finished. If rates dropped since you broke ground, that helps. If rates rose, you carry that risk.
The permanent loan is sold to Fannie Mae as either a cash-out or limited cash-out refinance, so it must meet Fannie Mae’s refinance eligibility standards on its own merits. Any outstanding construction liens must be satisfied before the permanent loan closes.4Fannie Mae. Two-Closing Construction to Permanent Financing Transaction Process
What Payments Look Like Before and After Conversion
During construction you do not make full principal-and-interest payments. Construction loans use interest-only payments calculated on the amount actually disbursed, not the total loan amount. If your lender has released $80,000 of a $400,000 loan, your monthly interest is based on that $80,000. As each draw is funded and the outstanding balance grows, your monthly payment grows with it.
Construction loan rates also tend to run higher than permanent mortgage rates, often by one to several percentage points, reflecting the greater risk to the lender on an unfinished property. Conversion is the moment that changes. You move from a high-rate, interest-only arrangement to a lower-rate, fully amortizing mortgage where each payment chips away at principal.
What Has to Be True Before the Loan Converts
No construction loan converts until the home is verified complete and habitable. The central document is the certificate of occupancy, issued by your local building authority after a final inspection confirms the home meets applicable safety and building codes. Without it, the lender has no proof the construction phase has legally concluded.
Recording a notice of completion with your local land records office is another common step. It starts a shortened countdown for subcontractors and suppliers to file mechanics liens. Once that window closes without any liens filed, both you and the lender have greater confidence no one will claim unpaid construction debts against the finished home.
Your lender will also require a final draw request showing all contractors have been paid and an accounting of the remaining budget. A licensed appraiser visits the finished home to confirm it was built substantially according to the approved plans and to establish market value.
Insurance changes too. During construction the project is covered by a builder’s risk policy. Before conversion, your lender will require you to replace that coverage with a standard homeowners policy, typically at the point the certificate of occupancy is issued.
Financial Standards Your Loan Must Meet at Conversion
Finishing the house is only half the picture. You and the property have to clear specific financial benchmarks for the permanent loan to fund.
Loan-to-Value Ratio
The loan-to-value ratio (LTV) measures your loan amount against the home’s appraised value. For conventional loans, an LTV above 80% triggers the requirement for private mortgage insurance, adding a monthly premium.5Fannie Mae. Provision of Mortgage Insurance Construction-to-permanent loans delivered through Fannie Mae can have LTV ratios up to 95%, though higher ratios mean larger insurance premiums and stricter approval criteria.
The danger zone is when the final appraisal comes in below your total construction costs. If you spent $450,000 building a home that appraises at $420,000, the lender calculates LTV based on $420,000. You would need to bring additional cash to closing to keep the ratio within acceptable limits. You can request a reconsideration of value if you believe the appraiser missed comparable sales, but appraisers rarely reverse their opinions by a meaningful amount.
Debt-to-Income Ratio and Credit Re-Verification
Lenders evaluate your debt-to-income ratio (DTI) at conversion, not just at original closing. For loans run through Fannie Mae’s automated underwriting system, the maximum DTI is generally 45%, while manually underwritten loans may be capped at 36% depending on compensating factors like cash reserves and credit score.6Fannie Mae. Eligibility Matrix
If the construction phase drags on, your lender will likely require updated credit documents before conversion, and the loan must be resubmitted through automated underwriting before conversion can proceed. Taking on new car payments, changing jobs, or running up credit card balances during the build can derail the process.
When Construction Runs Long
Delays are the norm in new construction. Weather, permit backlogs, supply chain disruptions, and contractor scheduling all push timelines. How your loan handles those delays depends on which structure you chose.
For single-close loans sold to Fannie Mae, the total construction period cannot exceed 18 months, and exceptions are not granted.1Fannie Mae. Conversion of Construction-to-Permanent Financing: Single-Closing Transactions If construction runs past that deadline, the lender must restructure the loan as a two-close transaction for it to be sold to Fannie Mae. Before hitting that ceiling, your rate lock can also expire, and extensions carry a fee if they are available at all.
For two-close loans, delays are less structurally threatening because you have not locked in permanent terms. But you are paying interest-only at construction loan rates for every extra month, and your construction loan has its own maturity date. If the build is not finished by then, you will need to negotiate an extension with the lender, which typically involves additional fees and possibly a higher rate on the remaining balance.
When the Conversion Falls Through
Not every construction loan converts successfully, and the consequences are serious. If the home is not completed by the maturity date, the final appraisal falls short, or your financial situation deteriorates during the build, the lender may not approve conversion.
For single-close loans, a failed conversion typically means the lender will not sell the loan to the secondary market, which may trigger default provisions in your loan agreement. For two-close loans, the construction debt comes due at maturity regardless of whether you have secured permanent financing. If you cannot refinance the balance into a mortgage, the lender can demand full repayment, and you may face foreclosure on a partially finished or newly completed home.
The most common reasons conversions fail are low appraisals, a borrower taking on new debt during construction, job loss, and construction running past the maturity date. Keeping a healthy financial cushion and staying in close communication with both your builder and your lender throughout the project are the best defenses.
FHA and VA Construction Loans
Conventional construction-to-permanent loans are not the only option. Government-backed programs work similarly but with different down payment rules.
FHA One-Time Close
FHA offers a single-close construction loan that converts automatically to a 30-year FHA mortgage when the home is complete. The minimum down payment is 3.5% of the appraised value or total project cost, whichever is lower. The home must be your primary residence and must be built by a licensed contractor. Modular and manufactured homes may also qualify with additional documentation. Because the FHA insures the loan, you will pay both an upfront mortgage insurance premium and ongoing monthly insurance premiums for the life of the loan.
VA Construction Loans
Veterans and eligible service members can use their VA loan benefit for new construction. The VA authorizes both one-time close and two-close construction loans under 38 U.S.C. ยง 3710. In a one-time close VA loan, the permanent financing terms are established before construction begins, and the terms are modified to their permanent values when building wraps up. VA loans can finance the cost of the lot, the construction contract, an interest reserve, a contingency reserve, and permits.7Veterans Benefits Administration. VA Circular 26-18-7 VA loans can require zero down payment, which makes new construction feasible for veterans who would struggle to come up with 20% on a conventional construction loan.