External wall insulation in Harrow
From Harrow to Wembley and Northolt, we plan external wall insulation around the house in front of us rather than a standard package, with guide prices online and a written quote after survey.
Homes in and around Harrow
Harrow is in the HA2 postcode district, about 10 miles from London. 6 other towns we cover are within 25 miles.
Nearby places we cover from Harrow include Wembley (2 miles), Northolt (3 miles) and Greenford (4 miles), all in England.
Your quote will name the certified system, the board thickness and the calculated U-value for your walls, not a vague 'insulation package'.
Nearby towns we cover: Wembley (2 miles), Northolt (3 miles), Greenford (4 miles), Ruislip (4 miles), Bushey (5 miles), Southall (5 miles).
External wall insulation prices in Harrow
Guide prices for external wall insulation in Harrow 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.
Bays, gables, conservatory junctions and narrow side passages take longer than plain walls, so the survey prices your actual house rather than an average.
Popular services in Harrow
- Mineral wool EWI
- Phenolic EWI
- Brick slip EWI
- Mineral & silicate render
- Solid wall insulation
- Non-traditional houses
- Bungalow EWI
- Terraced house EWI
- Detached house EWI
- Social housing EWI
- All 24 services
Rules that apply in Harrow
- 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 Harrow: questions
How much should I budget for external wall insulation in Harrow?
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 Harrow and fixes the total in writing.
Is VAT charged on external wall insulation in Harrow?
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 Wembley as well as Harrow?
Yes. From Harrow we also cover Wembley, Northolt and Greenford, and the rest of Greater London.