What affects the cost?
Garage conversion budgets depend on whether the garage is integral, attached or detached, its floor area, insulation, structural changes, heating, electrics and whether the new room needs plumbing.
- Integral, attached or detached garage
- Single, double or partial conversion
- Insulation and damp proofing
- Windows, doors and structural work
- Heating and electrical upgrades
- Bathroom or kitchen additions
Typical cost breakdown
Regional planning examples
The examples below apply our published modelling factor to the same national benchmark. They are not claimed as observed city-wide average quotes.
Sources used for this guide
Garage Conversion Cost 2026: UK Price Guide
Published / checked: May 2026
Used for: Garage conversion totals, cost-per-m² and conversion-type benchmarks
Frequently asked questions
How much does a garage conversion cost per m²?
A current UK planning range is roughly £625–£1,250 per m², depending on garage type and specification.
Is a garage conversion cheaper than an extension?
Usually. You are adapting an existing structure rather than building a new external shell, although detached or heavily upgraded garages can cost more.
Related costs
Garage door replacement
UK replacement garage door costs for up-and-over, roller, sectional, insulated and electric doors, including typical installation labour.
About £1,245–£4,000 including installationView guide →Cost guideBuild a garage
UK garage construction costs for single and double garages with flat or pitched tiled roofs.
About £25,000 for a single garage with flat roofView guide →Cost guideFlooring
Typical UK laminate, engineered wood and hardwood flooring supply and fitting costs.
Laminate around £60 per m² supplied & fittedView guide →