A double garage provides parking for two vehicles side by side and is a significant property addition that requires careful budgeting. The cost varies considerably by construction type, size, roof design, and finish level.

Brick-Built Double Garage

A traditionally built brick double garage of approximately 6m wide by 6m deep with a pitched tiled roof, two up-and-over doors, a personnel door, windows, and basic electrical installation typically costs £25,000 to £45,000. The higher end of this range reflects an insulated structure with a quality tiled roof, plastered interior walls, and a power supply capable of supporting lighting, power points, and potentially EV charging. Costs are higher in London and the South East and lower in the North and Midlands.

Timber-Framed Double Garage

A timber-framed double garage with boarding or cladding, a pitched or flat roof, two doors, and basic electrical supply typically costs £15,000 to £25,000. Timber-framed garages offer a faster build programme than brick and provide a good-quality storage and parking space, though they do not match brick in terms of thermal mass, acoustic performance, or long-term durability without maintenance.

Steel Sectional Double Garage

Sectional steel double garages are available as supply-and-fit packages from specialist suppliers. Prices range from £10,000 to £20,000 for a standard double width. They offer the fastest installation time and can be dismantled if needed, but have a more utilitarian appearance and do not provide the same level of insulation as brick or well-specified timber construction.

Planning Considerations

A double garage has a larger footprint than a single garage and is more likely to approach or exceed the 50 percent curtilage coverage limit in smaller gardens. Confirm the permitted development position before commissioning a design. If planning permission is needed, add the application fee (approximately £200 to £400) and the potential time cost of the planning process to the project budget.

Summary

Brick-built double garages cost £25,000 to £45,000. Timber-framed double garages cost £15,000 to £25,000. Steel double garages cost £10,000 to £20,000. Costs vary by region and specification. Check the 50 percent curtilage coverage limit before designing. A double garage with a room above costs £40,000 to £70,000 and typically requires planning permission.