Flat roof cost in Norwich
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What could move the final price
An estimate from 2026 roofing prices for our area, not a quote. Your fixed written quote follows a free survey, and the price we quote is the price you pay.
Flat roof cost in Norwich is £1,500 to £6,300 in 2026, from a felt garage roof to a large extension in GRP fibreglass. The price is set by the size of the roof and the covering. Build yours in the builder above for your own range.
Flat roof prices in Norwich by size and covering
| Roof | Felt (torch-on) | EPDM rubber | GRP fibreglass |
|---|---|---|---|
| Single garage (about 18m²) | £1,500 to £2,100 | £1,700 to £2,500 | £2,050 to £2,850 |
| Extension roof (about 25m²) | £2,100 to £2,900 | £2,350 to £3,450 | £2,850 to £3,950 |
| Large extension or dormer (about 40m²) | £3,350 to £4,650 | £3,750 to £5,500 | £4,600 to £6,300 |
Ranges are 2026 prices for Norwich, built from published UK roofing costs with a regional adjustment, rounded to the nearest £50. Your fixed written quote follows a free survey.
Straight answers
What sets the cost of a flat roof
Size
A single garage is about 18m², a single-storey extension about 25m². Price per m² does the rest.
Covering
Torch-on felt is £80 to £110 per m², EPDM rubber £90 to £130 and GRP fibreglass £110 to £150.
The deck underneath
A soft or rotten deck has to be replaced before the new covering goes on. We check it and tell you first.
Roof lights and upstands
Each roof light, wall and edge takes detailing. That is where cheap flat roofs leak, so we price it properly.
Every flat roof from Premier Home Improvements includes
- The old covering stripped and taken away
- The deck checked and made good
- Your choice of felt, EPDM or GRP with proper edge trims and upstands
- A fixed written price and a workmanship guarantee
Real customers
What Norwich homeowners say
"Today was a follow up visit, having had work done last April. I had noticed a few areas that needed attention so put a call in to Connor. James arrived to assess it, then returned with the materials to finish the work. Great attention to detail, respected my property, and came to find me to make sure I was happy."
Verified TrustATrader review"Ours is a 200 year old listed property. The team sympathetically removed the tiles and set them aside, replaced the old felt with a new breathable membrane, and reinstated the glazed Norfolk roof tiles, swapping any damaged ones like for like. They cut in new lead flashing and ridge caps, then repaired and redecorated both chimney stacks. Polite, tidy and skilled. Done on time and to the agreed fixed price."
Verified TrustATrader review"Colin and his team did an excellent job retiling the roof over our bay windows. He sourced pin tiles that practically matched the old ones, 1700 to be precise. He also repaired broken tiles on the main roof and put cowlings over the chimneys. All completed in just over a week, all debris cleared and removed. Highly recommended."
Verified TrustATrader reviewGood questions
Roofing prices, answered
How much does a flat roof cost in Norwich?
How much is a new garage roof?
Which is best, EPDM or GRP?
How long does a flat roof take?
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