Internal wall insulation · Greater London
Internal wall insulation in Coulsdon
From Coulsdon to Purley, we price internal wall insulation after a measured survey — no guesswork, and no work starts until the price is agreed in writing. We plan internal insulation in Coulsdon homes room by room so you keep the rest of the house usable.
- Free survey in CR5 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in Coulsdon
Postcode, service and a phone number is all we need.
What the job covers
- Insulated plasterboard, stud wall or breathable systems
- Sockets, radiators, skirting and coving are moved and refitted
- Needs careful detailing at floor joists, reveals and corners
- Keeps the outside of the house exactly as it is
What we look for in Coulsdon
We cover Coulsdon and nearby Purley, Banstead and Wallington. London's housing includes a large stock of Victorian and Edwardian solid-wall terraces, inter-war semis and post-war blocks, and conservation areas cover many streets — so planning is often the first question for external work.
Much of Greater London sits in the lower wind-driven rain exposure bands, which keeps the choice of finishes wide — though hilltop, coastal and exposed gable walls can still need a tougher specification, so we check the actual site.
Where a property in Coulsdon is in a conservation area or the front elevation must stay unchanged, internal insulation is often the practical route.
- Postcode district
- CR5
- County or area
- Greater London
- Nation
- England
- Nearby
- Purley, Banstead, Wallington, Sutton
England: planning and regulations
Planning isn't usually involved with internal insulation. Building control is, once more than half of a wall is treated, and listed buildings need listed building consent.
What are the risks with internal insulation?
Insulating inside makes the masonry colder, so moisture risk rises. Weak points are where floor joists bear into the wall, window reveals and corners. A condensation risk check for the build-up, a continuous vapour control layer where specified, and returning insulation into reveals deal with most of it.
Internal wall insulation prices in Coulsdon
| Item | Guide price | Notes |
|---|---|---|
| Insulated plasterboard, supplied and skimmed | £75–£110 per m²0% VAT | |
| Insulated stud wall | £90–£130 per m²0% VAT | |
| Typical bedroom, one external wall | £1,795–£2,9950% VAT | Including making good |
Confirmed by a fixed written quote after survey. 0% VAT: installing insulation in a home is zero-rated until 31 March 2027, so these figures are the total; 5% applies from 1 April 2027.
What happens next
Tell us about the property
Use the quote tool or form, or call. Photos help.
Free survey
We measure, check the walls and confirm approvals.
Fixed written quote
System, details, access, exclusions and VAT in writing.
Installation
Scheduled for suitable weather, with a clear programme.
Internal wall insulation in Coulsdon: questions
What happens to my radiators and sockets?
They're taken off and refitted on the new wall face. Electrical work is done by a qualified electrician.
How much room space will I lose?
Usually 50–100mm on each insulated wall, depending on the system.
Is internal insulation cheaper than external?
Per m² usually yes, but the cost of moving fittings and redecorating narrows the gap on whole-house jobs.
Do you cover Coulsdon?
Yes — we survey and quote internal wall insulation in Coulsdon (CR5) and nearby Purley, Banstead and Wallington, with a fixed written price before any work starts.