What affects the cost?
Flat roof replacement cost depends on roof area, covering material, insulation, deck condition, edge details and access. Modern EPDM and GRP systems generally cost more per square metre than basic felt or asphalt.
- Roof area
- Felt, EPDM, GRP, asphalt or green roof
- Condition of roof deck
- Insulation upgrade
- Upstands and edge details
- Access and waste removal
Typical cost breakdown
Regional planning examples
The examples below apply our published modelling factor to the same national benchmark. They are not claimed as observed city-wide average quotes.
Sources used for this guide
Flat Roof Replacement Costs in 2026
Published / checked: Updated February 2026
Used for: Flat roof total and per-m² benchmarks for felt, EPDM, GRP, asphalt and other systems
Frequently asked questions
How much does a flat roof replacement cost per m²?
A useful UK planning range is around £50–£110 per m², with a common midpoint near £75 per m².
Is EPDM more expensive than felt?
Typically yes. Current guidance places EPDM around £80–£100 per m² versus roughly £50–£80 per m² for felt.
Related costs
Roof replacement
Plan for a UK roof replacement including tiles or slates, membrane, battens, scaffolding and labour.
£4,000–£18,000View guide →Cost guideRoofer day rate
Typical UK roofer day and hourly rates for repairs and roofing work.
£280–£360 per dayView guide →Cost guideScaffolding
Typical UK scaffolding hire costs per square metre, by house type and project setup.
£20–£25 per m²View guide →