This guide gives realistic price ranges, plus regional differences (London vs the North, etc.) so homeowners can budget before requesting quotes.
Typical garage roof replacement costs in the UK
Most garage roof replacements sit within a broad range depending on roof type and materials.
Quick price snapshot (guide ranges)
| Garage type | Typical replacement price range (guide) |
|---|---|
| Single garage (flat roof) | £700–£2,000+ |
| Double garage (flat roof) | £1,000–£3,000+ |
| Single garage (pitched roof) | £2,500–£4,500+ |
| Double garage (pitched roof) | £3,500–£7,000+ |
These are guide ranges. Flat roof pricing is commonly discussed per m² and varies by system (felt/EPDM/GRP).
Costs per m² by flat roof material (felt vs EPDM vs GRP)
A lot of garages have flat roofs, so cost-per-m² helps compare options.
Flat roof cost per m² (installed) – typical UK ranges
| Material | Typical cost per m² (guide) |
|---|---|
| Felt (bitumen) | £50–£80 per m² (+VAT in some guides) |
| EPDM rubber | £80–£100 per m² (+VAT in some guides) |
| GRP fibreglass | £95–£120 per m² (+VAT in some guides) |
These ranges align with widely quoted UK cost guides.
Important: Some sources quote higher installed ranges (often depending on job complexity, insulation, access and region). For example, MyBuilder lists bitumen felt around £70–£100/m², EPDM £90–£130/m², GRP £95–£150/m².
Same goes for roofs that are currently with asbestos. See cost of asbestos garage roof replacement guide for more details.
Typical total costs for common garage roof sizes
Most homeowners want a “what will I actually pay?” view. The simplest way is to estimate roof area, then apply a per-m² range and add any extras (deck repairs, drainage, access).
Example totals (guide only)
| Garage roof size example | Felt (typical) | EPDM (typical) | GRP (typical) |
|---|---|---|---|
| 20 m² (small single garage) | £1,000–£1,600 | £1,600–£2,000 | £1,900–£2,400 |
| 30 m² (larger single / small double) | £1,500–£2,400 | £2,400–£3,000 | £2,850–£3,600 |
| 40 m² (double garage) | £2,000–£3,200 | £3,200–£4,000 | £3,800–£4,800 |
These totals use the per-m² guides above and are meant for budgeting. Always compare quotes locally.
The “hidden extras” that change the price most
These are the reasons two garages of “similar size” can get very different quotes:
1) Decking / timber repairs
If the roof feels soft, sags, or has been leaking for a while, the deck beneath may need replacing in sections.
| Extra item | Typical add-on cost (guide) |
|---|---|
| Local decking/timber repairs | £250–£1,200+ |
(Usually discovered during strip-off.)
2) Drainage and ponding water fixes
If water sits on the roof after rain, you may need outlet changes or drainage improvements.
| Extra item | Typical add-on cost (guide) |
|---|---|
| Outlet/drainage improvements | £150–£600+ |
(Quoted widely as a common cost driver in flat roof work.)
3) Access and scaffolding
Garages are often easier than house roofs, but access can still add cost (tight driveways, attached garages, height, obstacles).
Labour rates and access difficulty are commonly listed as key price drivers.
Regional price differences across the UK
Labour and demand vary by region. Costs are typically higher in London and the South East, and often higher in bigger cities and parts of the South West.
Regional uplift / discount guide (typical)
| Region | Typical price effect vs “UK average” |
|---|---|
| London | +20% to +40% |
| South East (outside London) | +10% to +25% |
| South West (some areas) | +5% to +20% |
| East of England | +5% to +15% |
| West Midlands / East Midlands | Around average (varies by city) |
| North West / North East | −10% to −20% |
| Yorkshire & Humber | −5% to −15% |
| Scotland / Wales | −5% to −15% |
| Northern Ireland | Varies widely by area and availability |
These percentage ranges are consistent with guidance that highlights London/South East premiums and lower averages in parts of the North, Scotland and Wales.
Example city/town pricing patterns (where costs often run higher)
You’ll often see higher quotes in and around:
- London (all boroughs), plus commuter areas
- Birmingham, Manchester, Leeds, Glasgow, Liverpool, Bristol, Sheffield, Edinburgh, Cardiff, Belfast (major city demand)
- High-demand towns/cities like Reading, Oxford, Cambridge, Brighton, Milton Keynes, Southampton, Portsmouth, Bournemouth
And more competitive pricing is often found in many areas across the North and parts of Scotland/Wales, depending on local demand and travel time.
Cost breakdown: what you’re paying for
A clear quote usually includes:
- Removing old covering (or preparing it for overlay if appropriate)
- Deck inspection and any repairs
- New roof system (felt / EPDM / GRP) and installation
- Edge trims, corners, and junction details
- Drainage/outlet checks
- Waste removal
Flat roof prices are commonly presented as “materials + labour per m²,” with access and condition pushing it up or down.
How to get an accurate quote (and avoid surprises)
Checklist for your quote request
- Postcode (this drives regional labour rates)
- Single or double garage (or approximate length/width)
- Roof type (flat / pitched / corrugated)
- What’s happening (leaks, cracking, ponding, sagging, rust, loose sheets)
- Whether the garage is attached to the house (junction/flashing work)
- Access notes (tight driveway, height, obstacles)
- If the roof feels soft or saggy (possible deck repairs)
Garage roof replacement cost FAQs
Is it cheaper to repair than replace a garage roof?
If the leak is localised and the covering is otherwise sound, repair can be cheaper short-term. If you’ve had repeated patch repairs, replacement often works out better value long-term.
Why do quotes vary so much?
The biggest reasons are region, roof size, material choice, access, and whether decking/timbers need repair. Labour costs are typically higher in London/South East.
What’s the cheapest flat garage roof option?
Felt is often the lowest-cost installed option per m² in many UK cost guides.
Do I need to replace the decking when replacing the roof?
Not always. But if the roof has been leaking for a while, some decking repairs are common once the old covering is removed.