How Does a Single-Close Construction Loan Work?

Why the "Single-Close" Structure Matters

Construction loans can be structured two ways: a single close or a two-time close. In a two-time close, you close on a temporary construction loan first, then refinance into a permanent mortgage after the home is built. That means two sets of closing costs, two appraisals, two rounds of underwriting, and the risk that rates or your financial situation have changed by the time you need the second loan.

A single-close construction loan eliminates all of that. You qualify once, close once, and the loan automatically converts when construction is complete. The final loan amount is based on the actual draws taken — so if you came in under budget, your permanent mortgage balance reflects that.

The Five Stages of a Construction Loan

Step 1: Find a Construction Lender First

Not all lenders offer construction loans. Many banks and mortgage brokers either lack the product or don't have loan officers experienced enough to manage the complexity. Before consulting builders, architects, or designers, establish your lending relationship and understand your borrowing capacity.

Step 2: Finalize Plans and Select a Builder

The lender funds a detailed project, not a concept. You will need a fully executed contract, a line-item cost breakdown, complete plans and specifications, a description of materials, and documentation of any soft costs already paid. Lenders prefer fixed-price contracts over cost-plus arrangements because they reduce budget uncertainty.

Builder approval is also part of the process. Your lender will review the builder's license, insurance, references, and financial stability. An unlicensed or financially unstable builder can derail an otherwise strong application.

Step 3: Close the Loan

After the lender approves the project and the appraisal is complete, you close. The appraisal is done on the "as-completed" value — what the home will be worth when finished — based on comparable sales. Lenders will base the loan on the lower of the construction cost or the appraised value.

If you already own the lot, its equity may count toward the required equity contribution. If you are purchasing the lot at closing, that transaction is typically included in the single-close structure.

Step 4: Construction and the Draw Process

Funds are not released all at once. They are disbursed in draws tied to construction milestones — foundation, framing, mechanicals, drywall, exterior, interior finishes. Before each draw is released, an inspection confirms the work is complete. The title company coordinates the draw process, collects lien waivers, and updates the title at each stage.

During construction, you make interest-only payments on the outstanding balance. As draws are taken and the balance grows, the monthly payment increases. This is expected and should be factored into your budget planning.

Change orders and cost overruns are common. If costs exceed the original budget, the additional funds typically come from the borrower, not the lender. Having contingency reserves — typically 5–10% of the construction budget — is critical.

Step 5: Conversion to a Permanent Mortgage

When construction is complete and the certificate of occupancy is issued, the loan converts. In a single-close structure, this requires no new application, no new appraisal, and no new closing. The note is modified, recorded with the county, and your payments shift from interest-only to principal and interest based on the final loan balance.

If you came in under budget and didn't draw the full construction amount, your permanent mortgage balance is lower than the original maximum. If you contributed additional funds during construction, those reduce the balance further.

What Determines Whether You Qualify?

• Credit score — typically 680 or higher for maximum financing
• Two years of documented income history
• Ability to qualify for two housing payments if you currently have a mortgage
• Sufficient reserves — lenders want to see funds beyond the down payment and closing costs
• An approved builder with a valid license, insurance, and acceptable track record
• A complete, lender-acceptable cost breakdown and contract

A Practical Example

A family in the Phoenix area owns a lot free and clear, valued at $120,000. They want to build a custom home with a total construction budget of $480,000. The lender uses the lot equity as the equity contribution, and the single-close loan covers the construction. During the build, they make interest-only payments as draws are released. When the home is complete, the loan converts to a 30-year mortgage at the final drawn balance — which came in $15,000 under budget, reducing their permanent loan accordingly.

Common Questions

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

In many cases, yes. If you own the lot outright or have significant equity in it, that equity can satisfy some or all of the required equity contribution. The lender will order an appraisal of the land to establish its current value.

What if construction takes longer than expected?

Construction loans have a defined term — typically 12 months. Extensions are possible but may involve fees or require lender approval. Delays are common; building in a realistic timeline buffer and maintaining communication with your lender and builder is essential.

Can I be my own builder (owner-builder)?

Some lenders accommodate owner-builder arrangements, but they are the exception. Most require the builder to be licensed, insured, and experienced. Owner-builder loans typically involve additional requirements, higher reserves, and more scrutiny.