Our Pricing - From £25 per m²

How much does it cost to replace a flat roof?

It’s difficult to give an accurate price without surveying the job, as every flat roof is different. However, most of the standard extension roofs are around the £40 plus VAT per m². See some examples below to get an idea of what your roof might cost.

All figures plus VAT

Dimensions – 9.3 x 25.7m (3 roofs)

Details – Pipe penetration.

Price – £5,880 (£24.60 per m²)

Dimensions – 20 x 13.2m 

Details – Membrane join

Price – £5,962 (£25.90 per m²)

Dimensions – 4 x 6.4m

Details – Central roof lantern, parapet wall and drainage trough.

Price – £1,180 (£46.10 per m²)

Dimensions – 4.2 x 4.5m

Details – Central roof lantern

Price – £800 (£42.33 per m²)

Dimensions – 11 x 7.4 (front) & 1.8 x 4m (main roof)

Details – Corner flashing.

Price – £1,620 (£54.77 per m²)

Dimensions – 4 x 14m (lower roof) & 4.5 x 13.2m (dormer roof)

Details – Central roof lantern x 2

Price – £3,790 (£34.49 per m²)

Dimensions – 1.2 x 8.5m (side roof) & 6.5 x 11.2m (main roof)

Details – Central roof lantern 2, pipe penetrations x 2.

Price – £2,870 (£42.85 per m²)

Dimensions – Various 185m²

Details – Roof light x 6, various penetrations. 

Price – £21,600 (£117 per m²) included insulation and deck