The short answer
MyBuilder's 2026 guide puts asbestos removal at about £2,000 on average, with general removal at around £50 per square metre. A single garage sits within that spread, and the final figure depends on roof area, sheet condition, access and disposal. They are averages from a national guide, and a firm number needs someone to look at your garage.
The typical UK figures
National cost guides give a starting point, nothing more. The MyBuilder asbestos removal guide for 2026 reports an average of about £2,000 for removal, plus a rate of about £50 per square metre for general removal. A garage roof is a small, simple job compared with a whole house loft or a farm shed, so where yours sits depends on its size and how the sheets are fixed.
MyBuilder (2026) reports those as typical UK ranges, and they are not prices we charge. They cannot account for your own garage: the number of sheets, the state they are in, whether there is a ceiling beneath them, or how easily a skip lorry can reach the drive. A fixed quote can only follow a survey.
If you are also replacing the roof, MyBuilder's garage roof guide gives typical replacement figures: a single flat garage roof at £700 to £1,000, a double flat at £900 to £1,400 and a pitched garage roof at £2,500 to £4,500. Those cover the new roof, so removal and disposal of asbestos cement sheet is a separate line on top, which is why two quotes can look so far apart if one has left it out.
What moves the price
Several things push a removal figure up or down, and it helps to know them before you compare quotes.
- Roof area. More sheets mean more labour, more bagging and more to dispose of. A double garage is not simply twice a single, because ridge pieces and fixings change the work.
- Condition of the sheets. Sound sheets can be unbolted and lowered whole. Cracked, mossy or crumbling sheets take longer and need more protection for the person doing it.
- Access. A garage on a terraced street with a narrow lane takes longer to work around than one on an open drive. Scaffold or edge protection may be needed.
- Testing. A laboratory analysis is a small cost that settles what you have before anyone prices the job.
- Disposal. Asbestos waste needs separate handling from ordinary rubbish. It is wrapped, taken to a site that accepts it, and the rules and charges differ by area.
- What goes back on. New sheets, a pitched timber roof or a flat deck all cost differently, and each changes the structure that has to be checked.
Removal, overlay or leaving it alone
Removal is not the only route. Where cement sheets are sound and the garage is in good shape, they can sometimes be left in place or covered over. The page on the asbestos garage roof sets out the options and the cases where each one makes sense. Leaving sheets alone avoids disturbing them, but it does nothing about a leak or a failing fixing.
An overlay, where a new covering goes over the old sheets, saves the disposal cost and the dust of lifting, so it often prices lower. The sheets must be strong enough to carry the load, and HSE's task sheet says the new covering should be fixed to the existing purlins, avoiding drilling through the cement sheet. If the old sheets are brittle or badly weathered, an overlay may not be sensible, and the person who looks at the roof should say so directly.
Removal costs more now and leaves a clean roof structure that can be inspected, repaired and insulated. It also means the garage no longer carries sheets that need managing every time you sell, extend or convert.
The rules that shape the work
On the HSE's reading, lifting cement roof sheets off intact counts as non-licensed work. If the job will break the sheets up substantially, with significant quantities of dust and debris created, the same work is classed as notifiable non-licensed work. In practice, a roof that has already cracked or collapsed costs more to clear, because there is more protection to put in and more waste to bag.
This is the reason a survey matters. Two garages that look the same from the lane can differ in how brittle the sheets are, and that difference can move a quote by a noticeable amount. We cannot judge it from a photograph sent in a message, and a national average cannot either.
Because asbestos counts as hazardous waste, any contractor carrying it away must have a hazardous waste consignment note. B&NES recycling centres accept household asbestos only from residents who notify the council beforehand and keep within its limits; other councils have their own rules, so check before any sheet is taken off the property. Nothing here is legal advice.
Getting a price you can compare
When you ask for quotes, give every firm the same information: the garage size, what the sheets are or are thought to be, whether any are broken, and what you want on the roof afterwards. A written quote should say whether it covers removal, disposal, scaffold if needed and the new roof, line by line. A figure far below the others often leaves out disposal or the new covering.
Come to us for the survey and you pay nothing for it; the photographs we take of your garage go into the written price we then fix. If you go ahead, a workmanship guarantee runs for ten years on paper. Ask any firm you are comparing us with to show theirs in the same form. Unsure what the sheets are? Start with our guide on how to tell, and if cost decides whether you patch or renew, read whether to repair or replace. The wider job is covered under garage roof replacement.
