Barndominium Construction-to-Permanent Loan

A construction-to-permanent loan — also called a one-time close loan — is a single financing instrument that covers both the construction phase and the permanent mortgage in one transaction. You close once before construction begins: the loan funds draws to your builder as verified milestones are completed, then automatically converts to a standard principal-and-interest mortgage once the barndominium has a certificate of occupancy. You never reapply, there is no second appraisal after completion, and there is only one set of closing costs.

A standalone construction loan is short-term financing — typically 12 to 18 months — that covers only the build. Once construction ends, you must apply for a separate permanent mortgage, pay a second set of closing costs (typically 2 to 5 percent of the loan amount), and requalify based on your financial situation at that time. A construction-to-permanent loan eliminates that second step: the conversion to permanent financing is built into the original agreement and happens automatically at certificate of occupancy, with no new application, no second appraisal, and no rate risk at conversion.

Four programs offer one-time close construction-to-permanent options suitable for barndominiums. USDA Section 502 Guaranteed loans offer zero-down one-time close financing in eligible rural areas. FHA One-Time Close loans offer 3.5% down construction-to-permanent financing without geographic restrictions. VA construction-to-permanent loans offer zero-down financing for eligible veterans. Conventional one-time close programs through portfolio lenders and some national lenders require 10 to 20 percent down but offer rate lock flexibility. The USDA and FHA programs are the most accessible for first-time barndominium builders because of the lower down payment requirements.

It depends on the lender and program. Some construction-to-permanent lenders offer a rate lock at the initial closing that carries through to the permanent mortgage — which protects you if rates rise during the build. Others set the permanent rate at the time of conversion, which introduces rate risk over a 12 to 18 month build. A third structure is a "float-down" option: a rate lock with the ability to lower if rates drop before conversion, usually for an additional fee. When comparing construction-to-permanent lenders, ask specifically: "Is the permanent rate locked at initial closing or set at conversion?"

During the construction phase, you pay interest only on the amount that has been drawn — not on the full loan commitment. The lender releases funds in stages tied to verified construction milestones: site prep and foundation, shell erection, rough-in inspections, interior framing and insulation, interior finishing, and final completion with a certificate of occupancy. At each draw, your builder submits a draw request, the lender sends an inspector to verify the milestone, and the funds are released — typically within 3 to 10 business days of verification. The construction phase typically runs 12 to 18 months.

Conversion is triggered by the issuance of a certificate of occupancy (CO) from your local building authority, combined with the lender's final inspection confirming all work is complete and the property is habitable. Once the CO is received and the lender's final draw is released, the loan automatically converts to the permanent mortgage terms specified at the original closing. Your first principal-and-interest payment typically begins the first of the month following conversion. In most one-time close structures, conversion is administrative — no signatures, no new documents, no additional cost.

Most construction-to-permanent loans allow extensions, but they come with cost. The original term is typically 12 months, with one or two 6-month extensions available at the lender's discretion. Extensions usually require payment of an extension fee (commonly 0.25 to 0.5 percent of the loan amount) and may be conditioned on documented construction progress. If the build is behind schedule due to supply chain delays, contractor issues, or permitting problems, notify the lender early — not when the deadline is imminent. Lenders are generally willing to extend when they understand the reason; they are less flexible when they feel surprised.

If you already own the land, the appraised value of the land (minus any existing lien) typically counts as equity toward the down payment requirement — eliminating or reducing the cash needed at closing. If you are purchasing land as part of the same transaction, many construction-to-permanent lenders handle the land purchase and construction financing in a single closing. In this case, the loan covers the land purchase plus the construction budget, and your down payment is calculated on the combined total. Owning land free and clear before starting the financing process is the cleanest structure and most consistently accepted by lenders.