Compare integral, attached and detached garage-conversion budgets and the work needed to make a garage habitable.
Applies to: UK homeowners. Planning and Building Regulations requirements depend on the property and intended use.
Last checked: 3 October 2026
Key points
• Current major UK guides place many standard garage conversions around £8,000–£20,000.
• Current UK market guidance puts an average standard garage conversion around £14,500.
• Detached garages and conversions adding kitchens or bathrooms can cost much more.
• Insulation, floor levels, windows, ventilation and utility upgrades are common budget items.
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Typical 2026 ranges
Current UK market guidance puts garage-conversion costs from about £8,000 to £45,000 across different garage types, with an average standard project around £14,500. Another current UK market guide gives around £10,000–£20,000 for many integrated or attached 16m² garages.
What turns a garage into habitable space
• Thermal insulation.
• Floor build-up and damp protection.
• Replacing or infilling the garage door.
• Windows and ventilation.
• Heating and electrics.
• Plastering and finishes.
• Plumbing where required.
Check approvals early
Garage conversions can require Building Regulations approval and may need planning permission in some situations, particularly where permitted-development rights are restricted.
Further sources
Additional published guidance and research used in this article.
Pricing methodology
BuildPair reviews current UK market pricing references when preparing cost guides. Published figures are budgeting ranges, not BuildPair quotes or guaranteed local prices. Compare current local quotes before appointing a tradesperson.
BuildPair provides general information and signposting, not legal, structural, electrical, gas or building-control approval. Requirements can change and the right answer depends on the work, contract, location and facts.
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