External wall insulation in Northampton
Every external wall insulation job in Northampton starts with a free survey of your walls: what they are built from, how they have weathered, and what the details around windows, eaves and services will need.
Homes in and around Northampton
Northampton is in the NN1 postcode district. 6 other towns we cover are within 25 miles.
Our Northampton surveys cover the NN1 district and the surrounding area, including Wellingborough, Daventry and Rushden.
Most EWI failures start at the edges rather than the middle of a wall, so the quote for your Northampton home sets out how each detail will be built.
Nearby towns we cover: Wellingborough (9 miles), Daventry (12 miles), Rushden (12 miles), Kettering (12 miles), Milton Keynes (15 miles), Market Harborough (16 miles).
External wall insulation prices in Northampton
Guide prices for external wall insulation in Northampton 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 Northampton
- EPS insulated render
- Brick slip EWI
- Pebbledash & dry dash EWI
- Bungalow EWI
- Terraced house EWI
- Semi-detached EWI
- Detached house EWI
- EWI repairs
- Failed EWI remediation
- EWI surveys
- All 24 services
Rules that apply in Northampton
- 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 Northampton: questions
How much should I budget for external wall insulation in Northampton?
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 Northampton and fixes the total in writing.
Do you cover Wellingborough as well as Northampton?
Yes. From Northampton we also cover Wellingborough, Daventry and Rushden, and the rest of Northamptonshire.
Which EWI system suits homes in Northampton?
It depends on the walls. Most brick houses in Northampton 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.