Instant 20×20 garage plans

Customize an instant 20×20 garage plan for your property, with local zoning checked automatically and coordinated, permit-ready drawings.

20x20 Compact Two-Bay Gable Garage

20x20 Single-Bay Hip-Roof Garage

20x20 Two-Bay Single-Slope Garage

Instant 20×20 garage plans, customized for your property

Use the footprint as a starting point, then coordinate parking, storage, doors, foundation, roof, site placement, and permit drawings.

Built around your vehicles

Set the bay count, vehicle clearances, overhead doors, service doors, storage, and workshop space before the footprint is fixed.

Fitted to your property

Coordinate the garage with setbacks, lot coverage, driveway access, grading, utilities, and its relationship to the house.

Zoning checked automatically

HomeCat checks the location for property rules that affect garage size, height, placement, and permitted use.

Permit-ready drawing package

Prepare site, floor, elevation, foundation, framing, and roof information for permit review and contractor pricing.

Review the garage in 3D

See the doors, roof, openings, exterior materials, and parking arrangement together before construction starts.

Structure and quantities

Keep wide openings, foundation decisions, framing spans, materials, and cost-planning inputs coordinated with the design.

Example plans for garage permits

See how exterior elevations, wall framing, and roof framing are coordinated for a detached garage permit package.

Front wall framing drawing for a detached two-bay garage — **Wall framing plan**Garage-door openings, studs, headers, plates, dimensions, and structural notes.

Front exterior elevation drawing for a detached two-bay garage — **Exterior elevation**The garage exterior with doors, materials, grade, and overall building height.

Roof framing plan for a detached garage with dimensions and structural notes — **Roof framing plan**Rafters, ridge members, framing direction, spacing, and key dimensions.

How to customize 20×20 Garage Plans with HomeCat

1
Set the garage requirements
Choose the number of bays, vehicles, storage, workshop needs, doors, roof form, and exterior style.
2
Add your property
HomeCat checks zoning and coordinates access, setbacks, lot coverage, grading, utilities, and the house relationship.
3
Refine the layout and shell
Adjust parking, storage, openings, foundation, roof, and finishes while reviewing the garage in 3D.
4
Get coordinated garage plans
Save the final design and prepare the site, floor, elevation, foundation, framing, and quantity information.

Dimensioned floor plan for a detached two-bay garage — **Example garage floor plan**Vehicle spaces, doors, windows, and dimensions in one measured layout.

20×20 Garage Plans FAQ

Is a 20×20 garage large enough for two cars?

It can fit two compact or midsize vehicles, but it is tight after accounting for walls, open vehicle doors, storage, and a clear exit path. Measure the actual vehicles before committing.

Does a 20×20 garage need a permit?

Almost always. A detached garage commonly requires zoning review, a building permit, structural documents, inspections, and separate trade permits.

Can a 20×20 garage use a floating slab?

Only where soil, frost, loads, and local code allow it. Many sites require frost-protected footings, an engineered thickened-edge slab, or a stem-wall foundation.