If your roof is reaching the end of its life, or storm damage has left you facing major repairs, one of the first questions is: how much will a new roof actually cost? In Devon and Cornwall, costs can vary significantly depending on the property type, roofing material, and access — a terraced house in Plymouth is a very different job from a detached stone farmhouse on Dartmoor.
This guide breaks down real-world costs for the most common roofing projects we carry out across the region, so you can budget with confidence before requesting quotes.
Average Roof Replacement Costs in Devon & Cornwall (2026)
The following prices are based on our recent projects across the region and include scaffolding, materials, labour, and waste removal. VAT is included.
| Property Type | Typical Cost Range | Timeframe |
|---|---|---|
| Terraced house (full re-roof) | £5,000 – £9,000 | 3–5 days |
| Semi-detached house | £7,000 – £13,000 | 4–7 days |
| Detached house | £10,000 – £20,000 | 5–10 days |
| Bungalow | £6,000 – £12,000 | 4–6 days |
| Flat roof replacement (garage/extension) | £1,500 – £5,000 | 1–3 days |
These are typical ranges — your final price depends on several factors we'll cover below.
What Affects the Cost of a New Roof?
Roofing Material
Material choice is the single biggest cost variable. Devon and Cornwall properties traditionally use natural slate, which is more expensive than concrete tiles but lasts significantly longer — 75 to 100 years versus 30 to 50 years for concrete.
| Material | Cost per m² | Expected Lifespan |
|---|---|---|
| Concrete tiles | £45 – £65 | 30–50 years |
| Clay tiles | £55 – £80 | 50–70 years |
| Spanish natural slate | £65 – £90 | 75–100 years |
| Welsh slate | £90 – £130 | 100+ years |
| Delabole slate (Cornish) | £100 – £140 | 100+ years |
| GRP fibreglass (flat roofs) | £70 – £100 | 25–30 years |
| EPDM rubber (flat roofs) | £55 – £80 | 25–30 years |
For period properties, stone cottages, and conservation areas in Devon and Cornwall, natural slate is often the required or most appropriate choice. Our slate roofing specialists can advise on the best option for your property.
Property Size and Roof Complexity
A simple gable roof on a modern semi is straightforward. A Devon longhouse with multiple hips, valleys, dormers, and chimney stacks takes considerably longer and costs more. Valley gutters need specialist leadwork, and each chimney requires proper flashing — both add to the total.
Scaffolding and Access
Scaffolding typically costs £600 to £1,500 for a residential property. Difficult access — narrow lanes, steep gradients, or properties with no hard standing — can push this higher. Many rural Devon and Cornwall properties have access challenges that urban homes don't.
Structural Work
If the roof timbers, battens, or decking beneath the tiles are rotten or damaged, they'll need replacing before the new covering goes on. This isn't always visible until the old roof is stripped, which is why we always flag potential additional costs during the initial inspection.
Repair vs Full Replacement: When Is Each Worth It?
Not every roof problem needs a full replacement. Targeted repairs can extend your roof's life by years at a fraction of the cost.
| Scenario | Recommendation | Why |
|---|---|---|
| A few slipped or cracked slates | Repair | Quick fix, typically £150–£400 |
| Localised leak around chimney | Repair | Usually a lead flashing issue, £250–£600 |
| Widespread nail sickness | Replace | Slates slipping throughout means the fixings have failed |
| Roof is 80+ years old with multiple issues | Replace | Ongoing repairs will cost more than replacement over 5 years |
| Planning to install solar panels | Replace if roof is over 15 years old | Removing solar panels for roof work later doubles the cost |
Hidden Costs to Watch For
- Asbestos removal: Some older properties in Devon and Cornwall have asbestos cement roof sheets or soffits. Specialist removal adds £1,000 to £3,000 depending on the area.
- Gutter replacement: If your gutters and fascias are old, it makes sense to replace them while the scaffolding is up rather than paying for separate access later.
- Chimney repairs: An exposed chimney stack that needs repointing or new flashing is best done at the same time as a re-roof.
- Insulation upgrade: Building regulations may require improved insulation when you replace a roof, which adds cost but reduces energy bills long-term.
- Planning and listed building consent: Properties in conservation areas or with listed status may need consent for roofing work, which can affect material choices and costs.
How to Get an Accurate Quote
The only way to get a reliable figure is with an in-person inspection. A roofer needs to see the property, assess the roof's condition, check access, and measure up. Be cautious of any quote given over the phone or from a photo alone.
We provide free, no-obligation inspections across Devon and Cornwall with no call-out fee. During the inspection, we photograph any issues we find and explain the options clearly — whether that's a targeted repair or a full replacement.
Financing a New Roof
A full roof replacement is a significant investment. As an Introducer Appointed Representative (FSR No. 1055250), we can connect you with financing options through Phoenix Financial Consultants, subject to status and credit approval. This means you don't have to delay essential roof work while you save.