External wall insulation in Finchley
Homeowners in Finchley look at external wall insulation for warmer rooms, lower heat loss and a new exterior in one job. Here is how it works, what it costs and which England rules apply.
Homes in and around Finchley
Finchley is in the N3 postcode district, about 7 miles from London. 6 other towns we cover are within 25 miles.
Our Finchley surveys cover the N3 district and the surrounding area, including Muswell Hill, Cricklewood and Kilburn.
Most EWI failures start at the edges rather than the middle of a wall, so the quote for your Finchley home sets out how each detail will be built.
Nearby towns we cover: Muswell Hill (2 miles), Cricklewood (3 miles), Kilburn (3 miles), Wood Green (3 miles), Barnet (3 miles), Archway (4 miles).
External wall insulation prices in Finchley
Guide prices for external wall insulation in Finchley 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.
What moves the price most is the board and finish you choose, the access around the house, and details such as roofline extensions or moving a gas meter.
Popular services in Finchley
- EWI installation
- EPS insulated render
- Phenolic EWI
- Wood fibre EWI
- Silicone render finish
- Mineral & silicate render
- Bungalow EWI
- EWI repairs
- Failed EWI remediation
- EWI surveys
- All 24 services
Rules that apply in Finchley
- 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 Finchley: questions
How much should I budget for external wall insulation in Finchley?
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 Finchley and fixes the total in writing.
Is VAT charged on external wall insulation in Finchley?
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 Muswell Hill as well as Finchley?
Yes. From Finchley we also cover Muswell Hill, Cricklewood and Kilburn, and the rest of Greater London.