Builder toolkit

Build homes USDA buyers can finance

Plain notes on what a home has to be to sit under a USDA loan, the energy code numbers you will be asked about, and calculators for cost, energy and water. Where we could not verify a fact, we say to confirm with the lender or USDA office.

Open the free check Register as a partner Build-cost estimator

Call Mae: (229) 297-USDA (297-8732). Mae is an AI assistant that answers around the clock, takes your ZIP and household size, and texts you the link. A person follows up.

1. What USDA expects from the builder

License. A builder who holds the contractor license your state requires. Rules differ by state; confirm with your lender and state licensing board.
Insurance. General liability and workers' compensation coverage as your lender or USDA office requires. Ask for the exact limits in writing.
Builder warranty. A written builder warranty or a third-party home warranty plan. The term and form are set by the lender or USDA office: confirm before you sign a contract.
Required inspections. Local building department inspections (foundation, framing, final) plus the inspections the lender or USDA requires during construction. Confirm the schedule with your lender.
Certificate of occupancy. The local jurisdiction issues it when the home passes final inspection. Expect the loan to close on a finished, occupancy-ready home.

Sources: 7 CFR Part 3550 (Direct), 7 CFR Part 3555 (Guaranteed), USDA Rural Development handbooks. Details change by program and by state office: confirm with your lender/USDA office.

2. Home types USDA allows

Site-built

Standard stick-built homes on a permanent foundation. The simplest path.

Modular

Treated like site-built when it meets the state building code and is set on a permanent foundation.

Manufactured

Must be built to the HUD code, on a permanent foundation, and titled as real property. Used units have age and never-moved rules: confirm the current rule with your lender.

Steel / barndominium

Can be allowed if it is a code-compliant dwelling. The usual hurdle is the appraisal: comparable sales can be thin. Talk to the appraiser early.

3. Size and what is not allowed

There is no hard square-foot cap.
For Direct loans, the home must be "modest" for the area and the loan must stay under the area loan limit.
No in-ground pools. Confirm with your lender how this applies to a Guaranteed loan.
No income-producing land (for example farmland run as a business) as part of the property.

4. Climate zone and the 2021 IECC R-values

Pick your climate zone from the code map or ask your building department. Georgia counties fall in zones 2A, 3A and 4A. The table below is the 2021 IECC prescriptive path. The performance path (HERS/ERI, REScheck) lets you trade items against each other. Existing homes do not need the new-construction energy code; it applies to new construction (confirm with your lender).

2021 IECC residential, R-value (prescriptive) method. Window = maximum fenestration U-factor. Zones 4 marine and 8 not shown.
Climate zone	Window U-factor	Ceiling	Wood-frame wall	Floor	Slab edge
1	NR	R-30	R-13	R-13	None (R-0)
2	0.40	R-49	R-13	R-13	None (R-0)
3	0.30	R-49	R-20, or R-13 + R-5 continuous	R-19	R-10, 2 ft deep
4 (not marine)	0.30	R-60	R-30, or R-20 + R-5 ci, or R-13 + R-10 ci	R-19	R-10, 4 ft deep
5	0.30	R-60	R-30, or R-20 + R-5 ci, or R-13 + R-10 ci	R-30	R-10, 4 ft deep
6	0.30	R-60	R-30, or R-20 + R-5 ci, or R-13 + R-10 ci	R-30	R-10, 4 ft deep
7	0.30	R-60	R-30, or R-20 + R-5 ci, or R-13 + R-10 ci	R-38	R-10, 4 ft deep

Source: 2021 International Energy Conservation Code, Chapter 4 [RE], Table R402.1.3: ICC code viewer. Cells were cross-checked against secondary summaries; confirm against the code edition your jurisdiction adopted, since states amend it. ci = continuous insulation. Use the energy calculator.

5. Energy credits: what ended and what remains

Ended. The federal 45L new energy efficient home credit (builders) ends for homes acquired after June 30, 2026. The 25C and 25D homeowner credits ended after 2025. See the IRS FAQ on the One Big Beautiful Bill Act changes and HUD's MES notice. Ask a tax professional how this applies to a specific home.
What remains. State home energy rebate programs (the federal HOMES and HEEHRA programs, run state by state and not available everywhere), utility rebates, and energy upgrades financed inside the loan where the lender allows it. Confirm each with your lender and your state energy office.

6. Tools

Build-cost estimator

Square feet times a rough $/sq ft range, plus optional site work, well/septic and permits.

Open

Energy and solar

R-values by zone, a rough yearly energy cost and a rough solar size.

Open

Water and septic

Well cost range, septic design flow by bedroom, tap fee.

Open

Where buyers are

The free check shows income limits by ZIP and Opportunity Zone counts by county, so you can see where your price point fits.

Open the map

Estimates only. Not a quote, not an approval. USDA or the lender decides.

Builders can also join the partner program and read the builder guide.