Replacing a single garage roof with galvanised steel box-profile sheets typically costs £950 to £1,800 in 2026, supplied and fitted. A double garage usually falls between £1,600 and £3,000. Size, access and region all move the figure, with London and the South East sitting towards the upper end.
If the old roof is asbestos cement, add £500 to £1,000 for a safe strip-off on a single garage. A complete package covering asbestos removal, legal disposal and a brand new steel roof usually lands between £1,500 and £3,000.
Below are the typical UK prices in full, what a proper replacement includes, and the checks that separate a fair fixed quote from an expensive surprise.
2026 Garage Roof Replacement Prices at a Glance
| Job | Typical price | Notes |
|---|---|---|
| New steel box-profile roof (single garage) | £950 – £1,800 | Supply and fit, anti-condensation membrane option, done in a day |
| New steel box-profile roof (double garage) | £1,600 – £3,000 | Larger sheet area, more flashings and fixings |
| Asbestos strip-off (single garage) | £500 – £1,000 extra | Added to the roof price, includes disposal paperwork |
| Asbestos removal plus new roof package (single) | £1,500 – £3,000 | Strip, dispose and re-roof in one visit |
| Replacement timber purlins | £150 – £400 extra | Only where the existing timbers are rotten |
| New guttering | £100 – £250 | Usually fitted the same day as the roof |
| EPDM rubber roof (single flat garage) | £900 – £1,800 | An alternative for flat roofs where steel is not wanted |
Treat these as typical ranges rather than fixed prices. Every roof differs in size, pitch and access, which is why a proper contractor measures up before giving you a number. Fibre cement sheets exist as an alternative, but they cost more than steel and weigh considerably more.
What a Proper Replacement Includes
A garage roof replacement is more than swapping sheets. Done properly, the old covering comes off completely so the structure underneath can be inspected honestly rather than guessed at.
Our standard garage roof replacement uses galvanised steel box-profile sheets with an anti-condensation felt option, new timber purlins or firrings where the old ones have rotted, and matching ridge and verge flashings. New guttering can go on at the same time. The site is left tidy and all waste is taken away.
That specification matters for the price. A cheaper quote that reuses tired timbers or skips the membrane looks good on paper and costs you again within a few years.
Want an exact figure for your garage? Request a free fixed quote today. There is no deposit* to pay and nothing owed until the job is finished, because you only pay on completion.
What Moves the Price Up or Down
Two garages of similar age can come in hundreds of pounds apart. These are the factors that do it:
- Size: a double garage carries roughly twice the sheet area of a single.
- Roof type: an apex roof needs ridge flashings and more labour than a simple pent or flat roof.
- Asbestos: cement sheets must be removed under controlled conditions and disposed of legally.
- Access: tight side alleys, rear gardens and garages in blocks slow both the strip and the fit.
- Timber condition: rotten purlins add £150 to £400 before the new sheets go on.
- Guttering: new runs add £100 to £250.
- Colour and finish: plain galvanised is the cheapest, coated colours cost a little more.
- Region: London prices sit above the national average.
Watch for three warning signs on any quote. No clarity on whether VAT is included, no mention of disposal paperwork where asbestos is involved, and a demand for a deposit up front. A confident contractor needs none of those.
Flat Garage Roofs: EPDM or Steel?
Flat and pent roofs give you two sensible routes. An EPDM rubber roof on a single flat garage typically costs £900 to £1,800 and suits garages where the deck is sound.
Steel box-profile works on pent roofs too, laid to the existing fall, and it is the standard modern choice for good reason. The sheets are light, last 30 to 40 years and go on in a day.
Weight matters most on prefabricated concrete garages. Their panels were never designed for heavy coverings, so lightweight steel suits them and concrete tiles do not.
The Asbestos Add-On
Most garages roofed before the 1990s carry asbestos cement sheets. They cannot simply be broken up and skipped, because removal is a controlled job with legal disposal requirements.
Our UKATA-trained teams handle the asbestos roof removal, and as an EA registered waste carrier (CBDU516703) we provide a disposal certificate with every strip-off. On a single garage this adds £500 to £1,000 to the roof price.
For a full breakdown of removal prices, including doubles and garages in blocks, read our guide to asbestos garage roof removal costs. And if the whole structure is past saving, garage demolition often costs less than people expect.
Repair or Replace?
Patching an old cement or corroded metal roof rarely pays. Sealants and overlay sheets buy a year or two at best, and any work on asbestos cement carries the same handling rules as removal. Once repair quotes reach a few hundred pounds, a new steel roof with a 30 to 40 year sheet life is the better spend, and as our guide on how long a garage roof replacement takes explains, most are finished within a single day.
How We Keep the Price Down
Labour is the biggest variable in any roofing quote. Because most garage roofs are replaced in one day, you are not paying for repeat visits, half-finished days or scaffolding sat on hire.
The Garage Roof Company works from Chessington in Surrey and covers London and the South East, including Greater London, Surrey, Kent, Sussex, Hampshire and Berkshire. That coverage keeps travel efficient and quotes sharp.
The pricing promise is simple. You get a free fixed quote, you pay no deposit*, and you settle on completion. The work carries a 10-year workmanship guarantee, and the steel sheets themselves carry manufacturer warranties of up to 30 years.
With more than 210 Google reviews at a 5.0 rating, the pricing stands up to scrutiny. Browse our case studies to see recent jobs, or call 0203 468 1242 for a straight answer on cost the same day.
