External wall insulation in Chiswick
Homeowners in Chiswick 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 Chiswick
Chiswick is in the W4 postcode district, about 6 miles from London. 6 other towns we cover are within 25 miles.
Our Chiswick surveys cover the W4 district and the surrounding area, including Acton, Barnes and Shepherds Bush.
Most EWI failures start at the edges rather than the middle of a wall, so the quote for your Chiswick home sets out how each detail will be built.
Nearby towns we cover: Acton (1 mile), Barnes (1 mile), Shepherds Bush (2 miles), Notting Hill (3 miles), Fulham (3 miles), Putney (3 miles).
External wall insulation prices in Chiswick
Guide prices for external wall insulation in Chiswick 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 Chiswick
- EPS insulated render
- Wood fibre EWI
- Brick slip EWI
- Mineral & silicate render
- Solid wall insulation
- Bungalow EWI
- Detached house EWI
- Park home insulation
- Flats & low-rise blocks
- EWI for landlords
- All 24 services
Rules that apply in Chiswick
- Funding
- Low-income households in homes rated below EPC C can apply for Warm Homes: Local Grant where their council is taking part. The Great British Insulation Scheme closed on 31 March 2026, and ECO4 closes on 31 December 2026; its final months are for finishing and putting right existing work. Grant schemes use their own approved installers, so check a scheme's installer rules before booking; our quotes are for privately funded work unless we confirm otherwise in writing. Grants guide
- 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 Chiswick: questions
How much should I budget for external wall insulation in Chiswick?
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 Chiswick and fixes the total in writing.
Do you cover Acton as well as Chiswick?
Yes. From Chiswick we also cover Acton, Barnes and Shepherds Bush, and the rest of Greater London.
Which EWI system suits homes in Chiswick?
It depends on the walls. Most brick houses in Chiswick suit EPS with silicone render; older stone or lime-built walls suit wood fibre or insulating lime render; and blocks need mineral wool. The free survey recommends one and explains why.