Garage roof cost guide
How much does a garage roof replacement cost?
Published prices for a new garage roof run from about £750 to £4,000, depending on whose figures you read. What the roof is made of and what is underneath explain most of that spread.
Anyone who searches for the price of a new garage roof finds a spread so wide it is hard to use. One source says a few hundred pounds, another says several thousand, and neither tells you what sits behind the number. A garage is small, but its roof can be flat or pitched, felt or rubber, sound underneath or rotten, and any of those changes the price.
This guide sets out the published third-party ranges with their sources, dates and units, explains what moves a garage roof price up or down, deals separately with the extra costs of asbestos cement sheets, and says what to look for in a quote. We never give a price on this page, because a price needs a survey. What we can give you is the context to judge any figure you are shown, ours included, along with the questions worth asking whoever is quoting, so that you compare like with like instead of one headline number against another.
01Side by side
What the published figures say
Two sources give garage-specific ranges, and they were gathered differently, so read them as two separate views rather than one answer. Which? priced work on a typical single garage measuring 6 m by 3 m. MyJobQuote publishes an average range for garage roof replacement in 2026.
Which? built its figures from a survey of 11 of its Trusted Traders in November 2025, counting labour and materials. It adds a warning for London and the South East: prices there are likely to be at the upper end of its ranges, and that region takes in both Kent and East Sussex. MyJobQuote gives no VAT basis for its figures, so do not read either VAT treatment into them.
The gap between the two sources is the first lesson. The lowest MyJobQuote figure is about half the lowest Which? figure for the same job type, which is what you would expect from different samples and different roof sizes. None of these numbers is a quote for your roof. They are useful for scale: they tell you that a garage roof is a job measured in thousands of pounds rather than hundreds at the upper end, and that the lower end of one source sits close to the middle of the other. Anything far outside both, in either direction, deserves a question about what has been left out or added in.
| Source | Job | Published figure |
|---|---|---|
| Which?, November 2025 | Felt roof, single garage 6 m by 3 m | £1,400 to £3,500, excluding VAT |
| Which?, November 2025 | PVC or rubber EPDM, same garage, with new boards | £1,950 to £4,000, excluding VAT |
| MyJobQuote, 26 October 2026 | Garage roof replacement, average | £750 to £3,500 |
| MyJobQuote, 9 October 2026 | Rubber roof, average | £1,050 fully installed |
02Price
What moves a garage roof price
When two quotes for similar garages differ, these are the first places to look. They are the questions we answer at the survey before a price is set.
- Size and shape. A single garage is a simple rectangle; a double garage, a garage with a lean-to or a roof with a rooflight is not. Awkward shapes mean more cutting and more edge to finish.
- The covering chosen. Felt, rubber and fibreglass differ in price and in lifespan, and our guide to the material for a garage roof compares them.
- The deck. Sound boards can stay. Soft or wet boards come off and new ones go on, and the Which? rubber figure above includes new boards in its price.
- The fall. If the roof ponds, the work includes correcting the slope, because BS 6229:2025 sets a minimum finished fall of 1:80 for membrane flat roofs.
- Access. A garage hard against a boundary, down a narrow drive, or behind a house is slower to work on and to clear.
- Rainwater goods and edges. New fascias, gutters and edge trims are sometimes part of the job, and sometimes belong in a separate plan.
None of these shows from the road. A quote that arrives without anyone looking at the boards or measuring the roof is a guess, and a guess in either direction stops being useful the moment the covering comes off.
Garage roof cost questions
Why do two garage roof quotes differ so much?
Because they describe different jobs: a different covering, boards kept or replaced, a fall corrected or ignored, scaffold included or not, VAT in or out. Ask both firms to state what is covered and what happens if the deck proves worse than expected. Written detail is what makes two figures comparable.
03Felt
Reading the felt and rubber ranges
For a flat garage roof, felt or rubber is the first choice to weigh. The Which? figures put the rubber job above the felt job at both ends of the range, £1,950 to £4,000 against £1,400 to £3,500, which is consistent with a longer-lived covering costing more to lay. The published lifespans point the same way: HomeBuilding gives torch-on felt 10 to 15 years and EPDM 25 to 30, while Less says 10 to 20 years for felt and that EPDM typically lasts 30 to 50 years.
It is tempting to divide the price by the years and pick the lower figure. That sum holds only for a roof with firm boards and a proper fall, because a covering fails early when either is wrong, whatever its published range says. Neither the price nor the lifespan figure tells you the condition of the boards under your roof. Price is not the only reason to prefer one covering. Rubber is laid in one sheet, which suits a plain roof, while felt copes with an awkward outline more easily and is simple to patch. The right choice follows the roof, and the written price follows the choice.
MyJobQuote's rubber page gives an average of £1,050 fully installed. It sits below the Which? EPDM range; the two measure different samples, and Which? includes new boards in its figure. When you compare a quote with a published number, ask what the number includes before you ask whether the quote is high or low.
GRP is priced after a survey like any other covering, and we do not quote a third-party figure for it here.
04Asbestos · Costs
Asbestos cement sheets add their own costs
If the garage has old corrugated cement sheets and was built or refurbished before 2000, HSE advises assuming asbestos is present. That changes both the method and the price, because the sheets are lifted whole wherever they can be and leave in a lockable skip on a consignment note, never an open one.
MyJobQuote publishes two averages that matter here: asbestos removal from a roof at around £2,750 in the UK (9 September 2026), and an asbestos survey at around £325 in 2026. Both are averages across UK jobs, not figures for a garage in Kent, and the removal figure covers a roof of unstated size, so read it as an indication of scale, not a forecast.
Does a small garage roof cost very little to replace?
Not necessarily. A small roof still needs the same set-up, the same deck checks and the same edge details as a large one, and the Which? range for a typical single garage runs to several thousand pounds. Size matters, but it is one factor among several.
- A test on a sample confirms whether the sheets contain asbestos, which is the first step before any plan.
- Removal of whole, intact cement sheets is non-licensed work, but it still needs careful handling and the right waste route.
- The waste goes in a lockable skip, since an open skip is not good enough for asbestos sheeting.
- A householder taking their own small amount to a Kent recycling centre follows different rules from a roofer's trade waste.
Our page on whether a garage roof is asbestos explains how the check works, while our garage roofs page explains how removal is handled. The new roof that follows the removal is priced in the same written total, so you see one figure for the whole job and not a removal bill followed by a roofing bill.
05Quotes
Reading the quote you are given
A written quote for a garage roof should be clear enough that you could hand it to a second roofer and ask what they would do differently. It need not run to pages, but it should say what is being done. Check that it states:
- which covering will be laid, and what happens to the existing one
- whether the boards are being replaced, patched or left, and on what evidence
- whether VAT is included, since Which? figures exclude it and MyJobQuote states no basis
- whether scaffolding, if the job needs it, is included in the total
- what happens to the waste, and for asbestos sheets, how
On scaffold, a garage roof may need none, but where scaffolding goes up on the public highway a licence is needed. Kent County Council charges £52 per week for a scaffold licence in 2026 to 2027, and East Sussex Highways lists £127 for 28 days on its fee table. We arrange the licence with our scaffolder, and it is part of the written total price, not a surprise afterwards.
A contract signed in your own home once our survey is done carries 14 days to cancel, and work can start earlier only on your written request. That protection applies to a new garage roof as it does to any other job agreed at your door, and it is worth reading the paperwork with it in mind. Ask for the quote to name the start date too, so that you can see how the 14 days and the booking fit together.
06The detail
How we price a garage roof
We price after a survey and give one written total price. The visit takes in the roof from above where we can reach it safely, the underside of the deck from inside the garage, the fall, the edges, the rainwater goods and the access. Where there are cement sheets, we say what they are likely to be and what the next step is before we name a figure.
The total is for the whole job, with the site left clean. It is not a list of separate charges, so there is no pool of small extras to arrive later. If the boards turn out worse than the survey could show once the covering is off, we stop, show you, and agree the change in writing before going on.
The survey is also where we say whether a repair would be sound, because a garage roof that has years left should not be replaced for the sake of it. Where a patch is honest value, the quote says repair, and what it will not fix.
You can keep the price fair on your side by clearing the garage of anything that cannot get wet, telling us about any leaks and any plans for the building, and saying whether you want insulation, a rooflight or new gutters while the roof is open. Each of those can be priced in at the start, which is cheaper than adding it later. If you are still deciding between a patch and a new roof, our repair or replace guide sets out how that call is made, and the garage roofs page lists the work we cover.
Is it worth paying for an asbestos test first?
Where the sheets are old corrugated cement, yes, because the test decides the method, the waste route and the plan. MyJobQuote puts the average UK survey cost at around £325 in 2026. Do not break or drill the sheets to take a sample yourself. Fibres are released when cement is cut.
Tell us what's wrong with the roof.
You'll get one written total price.