Who we help · Houses
Detached bungalow
Usual measures: Loft (large area), cavity, floor, solar on large roof. Watch-out: Heat pump friendly; single storey EWI is quick.
Typical prices
Bungalow prices
- Loft insulation (new or top-up)£900–£2,000
- Cavity wall insulation£1,000–£2,000
- Suspended floor insulation£2,500–£6,000
- External wall insulation + render£12,000–£20,000
Before grants · updated 11 October 2026 · a survey confirms the final figure.
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Construction, heat loss and watch-outs
- Typical construction
- 1950s–1980s cavity; large loft and floor area
- Where heat is lost
- Roof and floor are a big share
- Usual measures
- Loft (large area), cavity, floor, solar on large roof
- Watch-outs
- Heat pump friendly; single storey EWI is quick
Recommended
The insulation we usually recommend
Loft insulation
Mineral wool laid between and across the joists to 270–300 mm so heat stays in the rooms below.
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.
Suspended timber floor insulation
Mineral wool or rigid board between the joists with an airtight membrane.
External wall insulation (EWI)
A complete certified build-up of insulation board, mesh and render from one system holder.
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
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- Listed building or conservation area
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- Every property type
Begin your project
Price insulation for your detached 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.