UK garage conversion calculator

Garage Conversion Cost Calculator

Estimate a garage conversion using current 2026 UK cost-per-m² benchmarks with clearly separated type, specification and regional planning adjustments.

Garage floor area (m²)

Garage type

Finish level

Postcode (optional)Enter a postcode to set the cost region automatically.

Cost region

Estimated garage conversion budget

£11,102 – £22,203

Typical planning estimate £15,986. The national source range is £625–£1,250 per m²; garage type, finish and regional adjustments are UK Home Costs modelling assumptions. Bathrooms, kitchens and major structural defects can add more.

Benchmark source: Checkatrade Garage Conversion Cost 2026 UK guide, May 2026. See sources →

Garage Conversion planning toolBuilt from dated UK benchmarks with modelling assumptions kept separate.