External wall insulation in St Austell
Looking for external wall insulation in St Austell? We survey homes across Cornwall and the PL25 postcode district, measure every wall and give you a fixed price in writing before any work is booked.
Homes in and around St Austell
St Austell is in the PL25 postcode district, about 13 miles from Truro. 6 other towns we cover are within 25 miles.
From St Austell we also cover Bodmin (9 miles away), Truro (13 miles) and Newquay (14 miles).
Parts of Cornwall see high levels of wind-driven rain, so render specification and the details at sills and the roofline get extra attention.
Nearby towns we cover: Bodmin (9 miles), Truro (13 miles), Newquay (14 miles), Falmouth (18 miles), Redruth (21 miles), Camborne (25 miles).
External wall insulation prices in St Austell
Guide prices for external wall insulation in St Austell run from about £109 to £175 per square metre installed, depending on system and finish; scaffolding priced per house, with VAT at 0% on homes until 31 March 2027.
Brick slips, cladding and mineral wool cost more than EPS and render; the survey shows you the difference side by side.
Popular services in St Austell
- EWI installation
- Wood fibre EWI
- Insulated cladding
- Silicone render finish
- Pebbledash & dry dash EWI
- Solid wall insulation
- Bungalow EWI
- Semi-detached EWI
- Social housing EWI
- EWI repairs
- All 24 services
Rules that apply in St Austell
- Planning
- On a house, external wall insulation is usually permitted development if the finish looks similar to the existing walls. Render or cladding on a house in a conservation area, National Park, National Landscape (AONB), the Broads or a World Heritage Site needs planning permission. Flats and maisonettes have no householder permitted development rights, listed buildings need listed building consent, and an Article 4 direction can remove rights locally.
- VAT
- Installing insulation in a home is zero-rated for VAT until 31 March 2027, then 5%.
Checked October 2026. Rules change, so we confirm them for your address at survey.
External wall insulation in St Austell: questions
How much should I budget for external wall insulation in St Austell?
Budget around £109–£175 per square metre of wall for the system and finish, plus scaffolding priced per house. The survey measures your walls in St Austell and fixes the total in writing.
Is VAT charged on external wall insulation in St Austell?
Not on installing insulation in a home at the moment: that's zero-rated until 31 March 2027, after which the rate is due to be 5%. Work on commercial buildings is standard-rated.
Do you cover Bodmin as well as St Austell?
Yes. From St Austell we also cover Bodmin, Truro and Newquay, and the rest of Cornwall.