The short answer
MyBuilder's 2026 asbestos guide says a survey starts at about £50, with a full survey at £200 to £245. A roof inspection by a roofer is a separate service, which the same site puts at £150 to £500. If the sample proves positive, removing a single garage roof is typically £350 to £1,295. All of these are national figures from a price guide, and none is a Supreme Roofing price.
What the published survey prices cover
The most useful figures come from MyBuilder's asbestos removal cost guide, updated in August 2026. It puts an asbestos survey at about £50 to start, and a full survey at £200 to £245. The gap between those two numbers is mostly about scope. A low-cost visit may mean one sample from one sheet sent to a laboratory. A full survey looks across the whole structure, notes where material is found and how it is condition-graded, and writes it up.
For a single garage roof, the first kind of visit usually answers the question you actually have: is this sheet asbestos cement or not? The larger kind is more at home with a house, an extension and several outbuildings, where you need a record of everything. Ask whoever quotes which of the two they are pricing, and whether laboratory analysis is included or billed on top.
Sampling, analysis and what moves the price
Two things sit behind any testing price: someone taking the sample safely, and a laboratory analysing it. Taking a sample without crumbling the sheet matters, because the point of the exercise is to avoid releasing fibres to learn what the material is. Where several buildings or materials need sampling, each extra sample is another analysis. A roof with one uniform profile is a single material and a single question.
Access and location also matter. A garage tucked behind a terrace in a steep Stroud lane may be harder to reach than one on a flat drive, and a surveyor who has to bring a ladder through a house will reasonably price the visit differently. Travel time across the Five Valleys can show up as well. None of this is in the national guides as a separate figure, so treat the published range as the middle of the spread.
Roof inspection is not the same as an asbestos test
People sometimes assume that a roofer's visit settles the asbestos question. A roof survey looks at condition: slipped or cracked sheets, failed fixings, leaks, moss and the state of the gutters and the ridge. MyBuilder's 2026 roof inspection guide puts that kind of survey at £150 to £500, with a standard visit at £150 to £250, a drone survey at £200 to £400 and a thermal one at £300 to £500.
A roofing survey tells you what is wrong with the roof; the laboratory tells you what the roof is made of. They answer different questions, and for an old garage you may want both. If you are still at the stage of wondering, our answer on how to tell whether your garage roof is asbestos shows what you can gather first.
What a positive result adds to the budget
If the sample shows asbestos cement, the next number to look at is removal. The same MyBuilder guide gives an average of about £2,000 for asbestos removal in general, starting at £50 per m², and puts removing a single garage roof at £350 to £1,295 and a double garage at £650 to £1,800. Those figures cover taking the sheeting away, not building the new roof on top of it.
| Item | Typical UK range | Source |
|---|---|---|
| Asbestos survey | About £50 to start, or £200 to £245 for a full survey | MyBuilder, 2026 |
| Roof inspection | £150 to £500 | MyBuilder, 2026 |
| Single garage roof removal | £350 to £1,295 | MyBuilder, 2026 |
| Double garage roof removal | £650 to £1,800 | MyBuilder, 2026 |
Add the replacement covering and the rest of the bill follows. Our answer on how long a garage roof lasts helps you weigh coverings by life as well as price, and the main page on garage roof replacement sets out the whole job.
Who takes the sample, and why it is worth paying for
Some owners consider snipping a corner off a sheet and posting it to a laboratory themselves. We would not. Breaking cement sheet is exactly the disturbance you are trying to avoid, and a poorly taken sample can leave dust in the garage and a damaged sheet on the roof. A surveyor takes the piece from an edge or an existing break, bags it on the spot, and cleans the area afterwards.
The fee also buys a record. A written result with the date, the location of the sample and the lab's finding is something you can show a contractor, an insurer or a buyer later. Keep it with the house papers. Our garage roof replacement timing answer is worth a look once you have it, since the result decides which controls the programme needs.
Using the test result to plan the work
A clear result keeps the job simple in either direction. A negative sample means the roof can be treated as ordinary fibre-cement or metal sheeting and replaced without the controls that asbestos needs. A positive one means careful removal, wrapped and labelled waste and a quote that reflects that. Either way, you avoid paying for controls you do not need, or skipping ones you do.
If you are weighing felt against EPDM for the new roof afterwards, see felt or EPDM for a garage roof. We survey the roof, photograph it from above and write a quote once the material is known, covering scaffold, removal, waste and the new covering. Waste is taken away, and the finished work comes with our 10-year workmanship guarantee in writing.