Custom House Plans in Washington, DC

What's different about building in Washington

• ★Permits are issued by the DC Department of Buildings. Historic districts require HPRB review, and DC zoning is strict.

Building requirements

Building a house in Washington, DC: what the code requires

Statewide residential code

Building code

DC Construction Codes (the DC Residential Code, IRC-based with extensive DC amendments) are administered by the Department of Buildings.

Energy code

The DC Energy Conservation Code is among the most stringent in the US, and green building requirements apply.

Climate zone

IECC climate zone 4. Insulation, windows and HVAC are sized to match.

Typical frost depth

24–30 in. Footings must extend below the local frost line (confirm with your building department).

Foundations

Crawlspace or basement, depending on soil and lot slope.

Who can draw the plans

Single-family homes can generally be designed by a non-licensed home designer. A licensed engineer's stamp is often required for structural items, engineered foundations or special hazard zones, or when the local building official asks for it.

Engineer stamp

If your jurisdiction requires sealed drawings, add our District of Columbia Engineer Stamp / Permit-Ready package ($750).

District of Columbia-specific rules & hazards

• ●Historic districts require review by the Historic Preservation Review Board.
• ●Zoning (lot occupancy, height, rear yard) is strict, so check the DC Zoning Regulations early.

Summary for planning only. Codes, editions and local amendments change, so always confirm current requirements with the building department that will issue your permit. Our designers check your jurisdiction before drawing.

Towns, villages & rural counties

Permit checklist for building in Washington and surrounding towns

Requirements differ town by town. Use this checklist with your local building, zoning and health departments, and include what you learn in your design instructions. We'll draw to it.

1. 01Find who issues permitsIncorporated towns and cities usually have a building department. In unincorporated areas it's the county building or planning office, or a state agency, or in some rural areas nobody. Call before you buy the lot.
2. 02Zoning & setbacksCheck the zoning district for minimum lot size, front, side and rear setbacks, maximum height, lot coverage and whether barndominiums, ADUs or metal buildings are allowed.
3. 03HOA & deed restrictionsSubdivisions often restrict minimum square footage, exterior materials, roof pitch, garage orientation and outbuildings. These can be stricter than the town code.
4. 04Septic & well permitsWithout city sewer or water, you'll need a percolation (perc) test and a septic permit from the county health department, plus a well permit.
5. 05Driveway & culvert permitConnecting to a public road usually needs a driveway or culvert permit from the town, county or state DOT.
6. 06Floodplain development permitIf any part of the lot is in a FEMA flood zone, you'll need a floodplain permit and an elevation certificate, and the lowest floor must be at or above the Base Flood Elevation plus any local freeboard.
7. 07Energy code complianceMost jurisdictions require an energy compliance report (REScheck or similar) showing insulation, windows and HVAC meet the adopted energy code.
8. 08Engineering stampMany building officials require a licensed engineer's seal for foundations, beams, trusses, or high wind, snow or seismic zones. Add our Engineer Stamp option at checkout.
9. 09Utility & fire accessRural lots may need a fire-apparatus access road, a water supply for firefighting, or wildfire (WUI) defensible-space and ignition-resistant materials.
10. 10Inspections scheduleA typical sequence is footing, foundation, framing, rough MEP, insulation and final. A certificate of occupancy is issued after final inspection.

Popular styles around Washington

From $1,450

Colonial Plans in District of Columbia

Symmetrical facade, center hall, dormers and timeless proportions.

From $1,450

Contemporary Plans in District of Columbia

Bold massing, mixed cladding and bright, loft-like spaces.

From $1,300

Traditional Plans in District of Columbia

Brick and siding blends, hip roofs and a familiar, welcoming curb appeal.