How Much Does a Garage Conversion Cost?
£10,000 – £28,000
per job
A garage conversion costs between £10,000 and £28,000, depending on the size of the garage, the level of finish, and whether structural work such as underpinning or a new front wall is required. Converting a single integrated garage into a habitable room is one of the most cost-effective ways to add living space without the disruption of a full extension.
Average cost
£10,000 – £28,000
per job
Prices vary by region, property type and tradesperson. Always get at least two quotes.
What affects the price?
Garage size - a single garage conversion costs £10,000-£18,000; a double garage costs £15,000-£28,000
Structural work required - replacing the garage door with a new wall, window, and door is a significant element of the cost
Insulation and damp-proofing - solid concrete floors require insulation and DPC; walls may need internal insulation boarding
Electrics and plumbing - adding circuits, heating, and plumbing for a utility room or bathroom adds cost
Labour vs materials
Labour typically accounts for 50-60% of the total cost of a garage conversion. A standard single garage conversion takes two to three weeks for a small team.
Questions to ask your tradesperson
Ready to get it sorted?
Find available local builders near you — see who is free before you call.
Find a Builder — Free