Who we help · Houses
Chalet and dormer bungalow
Usual measures: Room-in-roof insulation, dormer cheeks, floor. Watch-out: Often missed by competitors.
Typical prices
Bungalow prices
- Room-in-roof£4,500–£9,000chalet
- Suspended floor insulation£2,500–£6,000
- Loft insulation (new or top-up)£900–£2,000
- Cavity wall insulation£1,000–£2,000
Before grants · updated 11 October 2026 · a survey confirms the final figure.
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Construction, heat loss and watch-outs
- Typical construction
- Room-in-roof upstairs
- Where heat is lost
- Sloping ceilings, dormers, stud walls
- Usual measures
- Room-in-roof insulation, dormer cheeks, floor
- Watch-outs
- Often missed by competitors
Recommended
The insulation we usually recommend
Room-in-roof insulation
Insulating the sloping ceilings, stud walls, flat ceiling, gables and dormer cheeks of an attic room.
Bay, dormer and reveal insulation
Insulating bay walls, dormer cheeks and window reveals to remove cold spots.
Suspended timber floor insulation
Mineral wool or rigid board between the joists with an airtight membrane.
Blown loft insulation
Loose-fill insulation blown into awkward, shallow or low-headroom lofts that rolls can't reach.
Cavity wall insulation
A borescope survey, then blown mineral wool or bonded bead injected into empty cavity walls.
Prices
Bungalow price column
| Measure | Bungalow |
|---|---|
| Loft insulation (new or top-up) | £900–£2,000 |
| Loft clearance and replacement | £2,000–£4,500 |
| Room-in-roof | £4,500–£9,000chalet |
| Cavity wall insulation | £1,000–£2,000 |
| Cavity extraction and refill | £3,000–£6,000 |
| Internal wall insulation (whole home) | £9,000–£18,000 |
| External wall insulation + render | £12,000–£20,000 |
| EWI with brick slip finish | £16,000–£27,000 |
| Re-render only (K Rend silicone) | £5,500–£10,000 |
| Suspended floor insulation | £2,500–£6,000 |
| Draught-proofing | £300–£800 |
| Whole-house fabric package | £20,000–£40,000 |
Indicative ranges for London and the South East, supplied and installed, including VAT, before grants. Updated 11 October 2026. A survey confirms your final price.
Grants and savings that may help
- ECO4Closes in 73 days
Up to fully funded; paid by energy suppliers per measure
Grant via local councils (£960m nationally in 2026/27)
- Social Housing Fund
Landlord-led bids
Saves 20% VAT
- Local schemes
Varies
Eligibility depends on your circumstances and is confirmed by evidence and the funder or council.
0% VAT on energy-saving materials
Insulation, solar panels, batteries and heat pumps installed in homes in Great Britain are zero-rated for VAT until 31 March 2027. Windows and doors are not included.Houses
Other property types
- Detached house
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- Mews house and cottage
- Detached bungalow
- Semi and terraced bungalow
- Period home
- 1930s home
- Post-war and ex-council house
- Non-traditional / system-built
- Listed building or conservation area
- Farmhouse, barn conversion or rural home
- New build or self-build
- Park and mobile home
- Every property type
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Price insulation for your chalet and dormer bungalow
See a price range for your property type in two minutes, with grants and 0% VAT applied where they fit. A survey always confirms the final figure.