On a regular FHA purchase, the loan is figured from the sales price. On a build there is no single sales price - there is a lot, a contract, some extras, maybe a land loan. FHA's handbook has a specific formula for adding those up, and the date you bought the land changes the answer.
FHA totals what the handbook calls the documented Acquisition Cost. It includes:
The builder's price, which includes the land if you are buying it from the builder. If you already own the land, the sum of all subcontractor bids and materials.
Borrower-paid options and construction costs that are not in the builder's price.
Closing costs tied to any interim financing of the land.
Counted one of two ways, depending on how long you have owned it.
The land counts at the lesser of what you paid and its appraised value, measured at case number assignment.
The land counts at its appraised value. If it has gone up since you bought it, that increase counts.
The lender takes the lesser of the appraised value and the documented Acquisition Cost as the Adjusted Value, then applies FHA's normal purchase loan-to-value percentage. FHA's Minimum Required Investment is at least 3.5 percent of the Adjusted Value, and it is higher at lower credit scores - see FHA credit score tiers.
Here is the part most people miss. The handbook lets the borrower use any cash investment in the Acquisition Cost or land equity to satisfy that Minimum Required Investment. If you own your lot free and clear, its value can do the job a cash down payment would otherwise do. Cash you put in must be documented from an acceptable source, and land received as a gift must come from a donor who is not a prohibited source.
Carrying a land loan? The loan can pay it off at closing; the lender needs the payoff statement and proof it was paid. The lender also needs the Closing Disclosure or similar document showing what you paid for the land and when.
Already built with a separate construction loan and just need the permanent mortgage? FHA treats that as Building on Own Land, a different section with a similar land rule, and it can count interest and costs on your construction loan in the Acquisition Cost. For who can build the home, see builder rules.
Source: HUD Handbook 4000.1 (Update 17, 11/26/2025), sections II.A.8.j.iv Calculating Maximum Mortgage Amount and v Minimum Required Investment, II.A.8.k Building on Own Land, and II.A.4 Minimum Required Investment. Lender overlays may apply. Not a commitment to lend.
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