Roof Replacement Cost Calculator — UK Prices 2025
Roof Replacement Cost Calculator
Enter your details for an instant estimate
Measure the slope area, not the footprint
Chimney work included?
Guttering replacement?
Urgent?
Adds ~20% to labour
Prices automatically adjust for your region
Fill in the details on the left to see your cost estimate
How much does roof replacement cost in the UK?
Use our calculator above to get an accurate estimate based on your specific requirements. Prices are based on real quotes from UK tradespeople and updated quarterly.
What affects the cost of roof replacement?
- Location: London and the South East are 15–40% more expensive than the national average.
- Size and complexity: Larger or more complex jobs cost proportionally more.
- Material quality: Budget, mid-range and premium specifications can vary by 2–3x.
- Time of year: Demand peaks in spring and summer — book in winter for better availability and pricing.
- Access: Difficult access (scaffolding, confined spaces) adds to labour costs.
How to save money on roof replacement
- Get at least 3 quotes from different tradespeople.
- Book during quieter periods (January–March for most trades).
- Be flexible on start dates — tradespeople often discount for convenient scheduling.
- Supply your own materials where possible (but confirm with your tradesperson first).
- Combine jobs — having multiple trades on site at once can reduce overall costs.
How to find a good tradesperson
Always check reviews on Checkatrade, Rated People or MyBuilder. Ask for references from recent similar jobs. Ensure they are appropriately qualified and insured. Never pay the full amount upfront — a deposit of 10–25% is standard.
Frequently asked questions
How much does a roof replacement cost in the UK?
A full roof replacement costs £5,000–£25,000 depending on size and material. A concrete tile roof costs £70–£135/m². A natural slate roof costs £100–£180/m². A flat EPDM roof costs £60–£115/m².
How long does a roof last in the UK?
Concrete tiles last 30–50 years. Natural slate lasts 80–150 years. Clay tiles last 60–100 years. Felt flat roofs last 10–20 years. EPDM flat roofs last 25–50 years. GRP fibreglass flat roofs last 25–40 years.
Do I need planning permission to replace my roof?
No, replacing like-for-like roof materials does not require planning permission. Changing the roof material or altering the roof shape may require permission, especially in conservation areas.
How do I know if I need a full roof replacement?
Signs you need a full replacement: widespread cracked or missing tiles, sagging roof deck, daylight visible through the roof, persistent leaks despite repairs, or a roof over 30 years old with no maintenance history.
Should I repair or replace my roof?
If less than 25% of tiles are damaged, repair is usually more cost-effective. If the roof is over 20 years old, has widespread damage, or the felt underlay is failing, a full replacement is better value long-term.