Garage Conversion Cost Index UK 2026
How much does garage conversion cost in 2026 — and how much more do you pay in London versus the cheapest UK regions? This BestBuilders study compares real 2026 quote data for a standard single garage conversion across all 14 UK regions. The headline: it costs up to 59% more in London (£4,000 more in absolute terms) than in Scotland (Highlands & North).
The regional gap: London pays up to 59% more for garage conversion
A standard single garage conversion starts at £10,800 in London versus £6,800 in Scotland (Highlands & North) — a £4,000 gap. That's a +59% London premium on the same job spec, driven mainly by labour rates and, on smaller jobs, access and permit costs. The pattern is consistent with RICS BCIS and FMB benchmark data.
Garage Conversion cost by UK region, 2026
Typical "starting from" prices for a standard single garage conversion, ranked most to least expensive region. Range shows the typical low-to-high spread within each region.
| UK region | Starting from | Typical range | Vs cheapest |
|---|---|---|---|
| London | £10,800 | £10,800 – £24,300 | +£4,000 (+59%) |
| South East | £10,000 | £10,000 – £22,500 | +£3,200 (+47%) |
| Southern (Hampshire, Wiltshire, Dorset) | £9,440 | £9,440 – £21,240 | +£2,640 (+39%) |
| Eastern (East Anglia) | £9,200 | £9,200 – £20,700 | +£2,400 (+35%) |
| West Midlands | £7,600 | £7,600 – £17,100 | +£800 (+12%) |
| South West | £7,600 | £7,600 – £17,100 | +£800 (+12%) |
| East Midlands | £7,440 | £7,440 – £16,740 | +£640 (+9%) |
| Merseyside & North Wales | £7,360 | £7,360 – £16,560 | +£560 (+8%) |
| North West | £7,360 | £7,360 – £16,560 | +£560 (+8%) |
| Yorkshire & Humber | £7,360 | £7,360 – £16,560 | +£560 (+8%) |
| South Wales | £7,040 | £7,040 – £15,840 | +£240 (+4%) |
| Scotland (Central & South) | £7,040 | £7,040 – £15,840 | +£240 (+4%) |
| North East | £7,040 | £7,040 – £15,840 | +£240 (+4%) |
| Scotland (Highlands & North) | £6,800 | £6,800 – £15,300 | baseline |
Want your local figure? Try our full garage conversion cost guide or get three free quotes below.
What sets the price for garage conversion?
The three main options homeowners typically choose from — and how they change the total:
- Single Garage. Convert an attached single garage into a habitable room — bedroom, office or playroom. Most fall under permitted development. 6–10 weeks on site.
- Double Garage. Convert a double garage into a self-contained living space, en-suite annexe or large open-plan room. Strong ROI for £15k–£30k.
- Detached Garage. Convert a detached or outbuilding garage into an annexe, home office or studio. May require planning permission depending on use.
Garage conversions deliver the lowest £/m² of any home extension — typically £900–£1,800/m² versus £2,000–£3,000/m² for a new-build extension.
Why does garage conversion cost more in London?
The +59% London premium on a standard single garage conversion tracks the same four factors seen across BestBuilders' full 2026 dataset, matching the pattern in RICS BCIS and FMB benchmark data:
- Labour rates. Skilled-trade day rates in London and the South East run 25–40% above the national average, the single biggest factor on a labour-heavy job.
- Demand and backlogs. High demand and long waiting lists let installers in the South East price higher; quieter regional markets are more competitive.
- Access and logistics. Restricted parking, skip and scaffold permits, congestion charges and tight rear access add cost in dense urban areas.
- Property type. London's older housing stock often needs more preparation or bespoke solutions than newer regional housing, which pushes labour hours up.
The takeaway for homeowners: the regional figure is a starting point, not a quote. The spread within a region — between the cheapest and most expensive installer — is often as wide as the gap between regions, which is why comparing three quotes matters more than any headline average.
Key findings, 2026 — Garage Conversion
- London is the most expensive UK region in 2026 for garage conversion, starting at £10,800 for a standard single garage conversion.
- The cheapest regions start from £6,800: Scotland (Highlands & North).
- That's a £4,000 cash gap on the same job spec — a +59% London premium.
- Values are typical "starting from" prices from BestBuilders' 2026 quote dataset across 519 UK towns in 14 regions.
- Cross-checked against RICS BCIS building-cost data and FMB member surveys — the regional pattern is consistent with both benchmarks.
Citing this study
You are welcome to cite the BestBuilders 2026 Garage Conversion Cost Index in articles and reports. Please credit BestBuilders with a link to this page (bestbuilders.co.uk/costs/garage-conversions-cost-index-2026).
The full regional dataset, charts and attributable commentary are available on request under a CC BY 4.0 licence — use the quote form below to get in touch and we will pass your request to our press team.
Garage Conversion cost questions
How we built this index
Figures are BestBuilders 2026 "starting from" prices for a standard single garage conversion, averaged by region across our quote dataset covering 519 UK towns grouped into 14 regions. Prices are rounded and are intended for budgeting, not as quotes. The regional pattern — London and the South East highest, Wales, the North East and Merseyside lowest — is consistent with independent benchmarks including RICS BCIS building-cost data and FMB (Federation of Master Builders) member surveys.
Last reviewed 2026 · Next scheduled review Q4 2026 · Published by BestBuilders, a UK home-improvement quote service. Editorial standards: figures are reviewed quarterly against live quote data and cross-checked against RICS BCIS and FMB benchmarks.
Explore the detailed cost guide: garage conversion cost guide. Or see the UK Home Improvement Cost Index 2026 for the full nine-project cross-service comparison, and the cost guide hub for every service we track.