Construction-to-permanent financing: one closing that carries you from dirt to mortgage

The two phases of a single loan

A construction-to-permanent loan, often shortened to CTP or single-close, is one credit decision covering two very different periods. Phase one is the construction period: the lender disburses funds in stages as the house goes up, and the borrower is billed for interest on the amounts actually advanced. Phase two begins at completion, when the same loan becomes an ordinary amortizing mortgage.

Fannie Mae's selling guide describes the mechanics directly: in a single-closing transaction, the construction loan converts automatically to permanent long-term financing when construction is complete. The guide also caps how long the construction phase can run, so the structure has a built-in clock; check the current limits in the guide itself, since they are program rules rather than physics.

How the conversion actually happens

Because everything was signed at the original closing, conversion is a paperwork event, not a new loan. Depending on how the lender documented the transaction, the note either already contains the permanent terms or is modified at completion under a process agreed to up front. The borrower does not reapply, and the lender does not re-decide the loan, although program rules can require updated credit documents if too much time passes or the borrower's circumstances change materially.

Contrast that with a two-closing structure, which Fannie Mae addresses separately: an interim construction loan is paid off by a brand-new permanent mortgage, with a new note, a second closing, and a second round of qualification. The permanent loan in that structure is underwritten as a refinance.

One closing versus two: the real tradeoffs

The single-close structure buys certainty. The permanent financing is committed before the first shovel of dirt moves, which removes the scenario borrowers fear most: a finished house and no mortgage to pay off the construction lender, because rates moved or circumstances changed during the build.

The two-closing structure buys flexibility at the price of that certainty. The borrower can shop the permanent loan fresh when the house is done, which can work out well or badly depending on where the market has moved, and must qualify again at that point. It also means paying two sets of closing costs. Neither structure dominates; the right choice depends on how much rate and qualification risk a borrower can absorb during a build that may take a year.

• Single close: one approval, one set of closing costs, permanent terms locked before construction
• Two closings: interim loan plus a separate permanent refinance, with requalification and second costs
• Both: draws, inspections, and builder review work the same way during construction

Qualifying and the as-completed appraisal

Underwriting a CTP loan means underwriting a house that does not exist yet. The appraiser works from plans, specifications, and the builder contract to produce an as-completed value, and the loan amount is sized against that value under the program's rules. The builder and the budget get reviewed alongside the borrower, because the lender's collateral depends on the project actually finishing.

The Consumer Financial Protection Bureau's overview of construction loans makes the consumer-facing version of the same point: these are short-term, stage-funded loans whose terms vary significantly by lender, so the details in your commitment letter, not a general description, govern your project.

Where a broker earns its place

Construction lending is one of the least standardized corners of the mortgage market. Lenders differ on builder requirements, draw procedures, construction-phase length, and whether they offer single-close at all. Wholesale Mortgage Lending arranges construction financing across multiple lenders and matches the structure to the project; we do not build, inspect, or permit anything, and questions about your specific build belong with your builder and your local building department.