Internal wall insulation · Kent
Internal wall insulation in Dartford
If you're planning internal wall insulation in Dartford, start with a free survey: we measure, check the walls and confirm planning and building control for your address. We plan internal insulation in Dartford homes room by room so you keep the rest of the house usable.
- Free survey in DA1 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in Dartford
Postcode, service and a phone number is all we need.
What you get
- Keeps the outside of the house exactly as it is
- Sockets, radiators, skirting and coving are moved and refitted
- Loses roughly 50–100mm per insulated wall
- Needs careful detailing at floor joists, reveals and corners
Before we quote in Dartford
Surveys in Dartford also cover the surrounding DA1 district and towns such as Bexley and Swanley. Dartford is about 18 miles from Maidstone. 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.
Much of Kent 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.
For terraced homes in Dartford with attractive brick fronts, one approach is to insulate the front internally and the rear externally.
- Postcode district
- DA1
- County or area
- Kent
- Nation
- England
- Nearby
- Bexley, Swanley, Welling, Grays
Approvals in England
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.
Do I need Building Regulations approval?
Yes, in England and Wales once you insulate or replaster more than half of a wall's area (or more than a quarter of the building's whole envelope), it's treated as renovating a thermal element. The wall should reach about 0.30 W/m²K where practical, and building control needs to be involved.
Internal wall insulation prices in Dartford
| 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
Enquiry
Send your postcode and a few details.
Measured survey
Walls, damp, eaves, cills and services recorded.
Written price
A fixed price with the specification attached.
Work and handover
Installed, inspected and documents handed over.
Internal wall insulation in Dartford: 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.
Can I stay in the house?
Yes, but each room is out of use while it's worked on, typically 3–5 days.
Do you cover Dartford?
Yes — we survey and quote internal wall insulation in Dartford (DA1) and nearby Bexley, Swanley and Welling, with a fixed written price before any work starts.