External wall insulation in Horsham
If you live in Horsham (RH12) and your walls are solid, system-built or simply cold, external wall insulation may be the most effective upgrade you can make without losing any room inside.
Homes in and around Horsham
Horsham is in the RH12 postcode district, about 7 miles from Crawley. 6 other towns we cover are within 25 miles.
We arrange surveys in Horsham (RH12) at a time that suits you, and cover neighbouring Crawley, Horley and Haywards Heath too.
We photograph every hidden layer as it goes on, so you have a record of what's behind the finish on your Horsham home.
Nearby towns we cover: Crawley (7 miles), Horley (11 miles), Haywards Heath (11 miles), Burgess Hill (11 miles), Reigate (13 miles), Redhill (14 miles).
External wall insulation prices in Horsham
Guide prices for external wall insulation in Horsham 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 Horsham
- EPS insulated render
- Phenolic EWI
- Wood fibre EWI
- Brick slip EWI
- Silicone render finish
- Pebbledash & dry dash EWI
- Solid wall insulation
- Bungalow EWI
- Semi-detached EWI
- Flats & low-rise blocks
- All 24 services
Rules that apply in Horsham
- 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 Horsham: questions
How much should I budget for external wall insulation in Horsham?
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 Horsham and fixes the total in writing.
Is VAT charged on external wall insulation in Horsham?
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 Crawley as well as Horsham?
Yes. From Horsham we also cover Crawley, Horley and Haywards Heath, and the rest of West Sussex.