London · London · 2026 Prices

How much does a flat roof cost in London?

The average cost of a flat roof replacement in London ranges from £1,800 to £8,400, with most homeowners paying around £4,200. Prices include VAT.

Flat Roof Replacement cost summary — London

Budget

£1,800

Average

£4,200

Premium

£8,400

Typical timeframe: 2-4 days. Prices are estimates for London and may vary.

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What affects the cost of a flat roof replacement in London?

1

Roof area (sq m)

2

Material (EPDM, GRP fibreglass, felt)

3

Insulation

4

Existing roof removal

5

Drainage

6

Access and scaffolding

Related costs in London

New Roof

£6,000 – £18,000

Garage Conversion

£9,600 – £30,000

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