Calculate your roof replacement cost
Roof replacement cost by type in London
Current national roof-type project ranges and cost-per-m² benchmarks are adjusted by the same 1.28× London model.
UK £7,000–£16,250 · £110–£260/m²£8,950–£20,800 · £150–£350/m²
UK £9,250–£18,000 · £145–£285/m²£11,850–£23,050 · £200–£350/m²
UK £2,800–£7,500 · £45–£120/m²£3,600–£9,600 · £50–£150/m²
Overall roof replacement benchmark
What can change a real London quote?
- Roof area, pitch and number of slopes
- Gable, hip or flat roof construction
- Tile, slate or flat-roof membrane specification
- Scaffolding and access
- Timber, decking or structural repairs
- Chimneys, valleys and rooflights
- Waste removal and making good
Local planning considerations
Dense access, parking, deliveries and contractor overheads can widen the spread between quotations, so use the figures as an early budget rather than a quote.
- Allow separately for parking, loading, permits or restricted delivery windows where a property has difficult street access.
- Flats and managed buildings can add landlord, freeholder or building-management requirements that are outside a basic works estimate.
- Party-wall, structural and access costs should be checked independently on extensions, lofts and major internal alterations.
How the regional model works
The 1.28× factor places this planning estimate 28% above the national planning baseline. We keep that modelling assumption separate from the dated national benchmark so users can see exactly which part comes from an external source and which part is UK Home Costs modelling.
Sources
Roof Replacement: Cost Breakdown 2026
Published / checked: June 2026
Used for: Gable, hip and flat roof replacement ranges and cost-per-m² benchmarks
Construction output price indices
Published / checked: 13 August 2026
Used for: Construction price trend and update checks
Frequently asked questions
How much does a roof replacement cost in London in 2026?
The current UK national average is about £8,000 and most projects are around £4,000–£19,000 before regional modelling. Applying the London factor gives a modelled London average of about £10,250 and a broad planning range of £5,100–£24,300.
How much is a gable roof replacement in London?
The national gable benchmark is £7,000–£16,250, or £110–£260 per m². Applying the London factor gives a modelled London project range of £8,950–£20,800 and roughly £150–£350 per m².
Why is the London roof estimate different from the UK benchmark?
UK Home Costs applies a 1.28× London planning factor, placing the model 28% above the national planning baseline. It is a modelling assumption, not a measured city-wide roofing index.
What can push a roof quote above the modelled range?
Scaffolding, rotten rafters or decking, chimneys, valleys, rooflights, premium slate or tile choices and difficult access can all increase the final cost.