Internal wall insulation · England
Internal wall insulation in Hampshire
Homes and buildings across Hampshire — from Southampton to Basingstoke — can get a free survey and written quote for internal wall insulation. We plan internal insulation in Hampshire homes room by room so you keep the rest of the house usable.
- Free survey and fixed written price
- Guide price from £75 per m² 0% VAT
- Planning and building control checked for England
Free survey in Hampshire
Tell us the postcode and what you need.
Part of every quote
- Keeps the outside of the house exactly as it is
- Loses roughly 50–100mm per insulated wall
- Can be done one room at a time during a renovation
- Sockets, radiators, skirting and coving are moved and refitted
- Insulated plasterboard, stud wall or breathable systems
Before we quote in Hampshire
Homes across the South East range from inter-war semis and post-war estates, which are mostly cavity-walled, to older solid-walled cottages and Victorian town terraces.
Exposure to wind-driven rain varies across Hampshire: sheltered town streets fare better than walls on high ground or facing the prevailing weather, and the render, beads and cill details are chosen with that in mind.
For terraced homes in Hampshire with attractive brick fronts, one approach is to insulate the front internally and the rear externally.
- Nation
- England
- Region
- South East
- Towns covered
- Southampton, Portsmouth, Basingstoke, Gosport, Waterlooville, Aldershot, Farnborough, Fareham…
- Guide price
- From £75 per m² 0% VAT
England: planning and regulations
Internal insulation rarely needs planning permission, but in England and Wales insulating or replastering more than half of a wall's area involves building control, and listed buildings need consent for internal changes that affect their character.
Renovating more than half of a wall's area — insulating it, or stripping and re-rendering it — or more than a quarter of the building's whole external envelope brings in the energy requirements of Part L, so building control needs to be involved and the wall should reach about 0.30 W/m²K where that's technically, functionally and economically feasible.
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 Hampshire
| 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.
How it works
Get a guide price
Try the online quote tool for a ballpark figure.
Book the survey
A visit at a time that suits you.
Agree the quote
Nothing starts until you've signed the written price.
We do the work
Planned around weather, with you kept informed.
Internal wall insulation in Hampshire: questions
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.
Can I stay in the house?
Yes, but each room is out of use while it's worked on, typically 3–5 days.
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.
Do you cover all of Hampshire?
Yes. We survey and quote internal wall insulation across Hampshire, including Southampton, Portsmouth, Basingstoke, Gosport, Waterlooville.
Do I need planning permission in England?
For houses, external wall insulation and render are often permitted development where the finish looks similar to the existing walls. We check your address before quoting.