Calculate your roof replacement cost
Roof replacement cost by type in Cardiff
Current national roof-type project ranges and cost-per-m² benchmarks are adjusted by the same 0.91× Wales model.
UK £7,000–£16,250 · £110–£260/m²£6,350–£14,800 · £100–£250/m²
UK £9,250–£18,000 · £145–£285/m²£8,400–£16,400 · £150–£250/m²
UK £2,800–£7,500 · £45–£120/m²£2,550–£6,850 · £50–£100/m²
Overall roof replacement benchmark
What can change a real Cardiff 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
For grants and energy schemes, verify the current Wales-specific eligibility rules before relying on any support assumption.
- Use Wales-specific planning, building-control and energy-scheme information where the rules differ from England.
- Terraced or constrained urban properties can add access, waste and scaffold costs that are not captured by the regional factor.
- Drainage, roof and external-work scopes should be based on the property condition rather than a generic city assumption.
How the regional model works
The 0.91× factor places this planning estimate 9% below 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 Cardiff 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 Wales factor gives a modelled Cardiff average of about £7,300 and a broad planning range of £3,650–£17,300.
How much is a gable roof replacement in Cardiff?
The national gable benchmark is £7,000–£16,250, or £110–£260 per m². Applying the Wales factor gives a modelled Cardiff project range of £6,350–£14,800 and roughly £100–£250 per m².
Why is the Cardiff roof estimate different from the UK benchmark?
UK Home Costs applies a 0.91× Wales planning factor, placing the model 9% below 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.