Guide ranges for privately funded work. Every price is fixed in writing after a free survey, before any work starts. Installing insulation in a home is currently zero-rated for VAT (until 31 March 2027, then 5%), so domestic install prices include no VAT. Removal-only and commercial work are standard-rated: commercial rows are shown plus VAT; for removal-only jobs the VAT treatment is confirmed on your quote.
Cavity wall insulation: bonded polystyrene bead
Cavity wall insulation: bonded polystyrene bead| Cavity wall insulation: bonded polystyrene bead | Guide price |
|---|
| Detached house | £2,295–£3,795 |
| Semi-detached house | £1,495–£2,495 |
| End-terrace house | £1,295–£2,195 |
| Detached bungalow | £1,295–£2,195 |
| Semi-detached bungalow | £895–£1,595 |
| Mid-terrace house | £795–£1,395 |
Cavity wall insulation: blown mineral wool
Cavity wall insulation: blown mineral wool| Cavity wall insulation: blown mineral wool | Guide price |
|---|
| Detached house | £1,895–£3,395 |
| Semi-detached house | £1,295–£2,195 |
| End-terrace house | £1,095–£1,895 |
| Detached bungalow | £1,095–£1,895 |
| Semi-detached bungalow | £795–£1,395 |
| Mid-terrace house | £795–£1,295 |
Cavity insulation top-up
Cavity insulation top-up| Cavity insulation top-up | Guide price |
|---|
| Detached house | £1,295–£2,295 |
| Semi-detached house | £795–£1,495 |
| End-terrace house | £695–£1,295 |
| Detached bungalow | £695–£1,295 |
| Semi-detached bungalow | £595–£995 |
| Mid-terrace house | £595–£995 |
Cavity wall insulation removal
Cavity wall insulation removal| Cavity wall insulation removal | Guide price |
|---|
| Detached house | £2,595–£4,195 |
| Semi-detached house | £1,695–£2,795 |
| End-terrace house | £1,395–£2,395 |
| Detached bungalow | £1,395–£2,395 |
| Semi-detached bungalow | £1,195–£1,695 |
| Mid-terrace house | £1,195–£1,595 |
Remove and refill
Remove and refill| Remove and refill | Guide price |
|---|
| Detached house | £3,895–£6,495 |
| Semi-detached house | £2,495–£4,295 |
| End-terrace house | £2,095–£3,795 |
| Detached bungalow | £2,095–£3,795 |
| Semi-detached bungalow | £1,695–£2,695 |
| Mid-terrace house | £1,595–£2,495 |
Party wall insulation
Party wall insulation| Party wall insulation | Guide price |
|---|
| Party wall, two-storey house | £595–£895 |
| Party wall, bungalow | £395–£695 |
Surveys and checks
Surveys and checks| Surveys and checks | Guide price |
|---|
| Suitability survey with an install quote | Free |
| Standalone survey report (no install quote) | £145–£245 |
Borescope inspection
Borescope inspection| Borescope inspection | Guide price |
|---|
| Borescope inspection, house | £145–£245 |
| Borescope inspection, block or large building | £295–£595 |
Thermal imaging
Thermal imaging| Thermal imaging | Guide price |
|---|
| Thermal imaging survey with borescope checks | £295–£495 |
| Thermal imaging survey, exterior only | £195–£295 |
Existing insulation and guarantee check
Existing insulation and guarantee check| Existing insulation and guarantee check | Guide price |
|---|
| Existing insulation and guarantee check | £145–£245 |
Damp investigation
Damp investigation| Damp investigation | Guide price |
|---|
| Damp investigation with borescope | £295–£495 |
Cavity cleaning
Cavity cleaning| Cavity cleaning | Guide price |
|---|
| Cavity debris clearance, per elevation | £395–£795 |
| Whole-house debris clearance | £995–£1,995 |
Wall ties
Wall ties| Wall ties | Guide price |
|---|
| Remedial wall ties, detached house | £1,995–£3,495 |
| Remedial wall ties, semi-detached house | £1,495–£2,495 |
| Remedial wall ties, terraced house | £995–£1,795 |
Repointing and repairs
Repointing and repairs| Repointing and repairs | Guide price |
|---|
| Repointing, per m² | £45–£75 |
| Brick replacement, per brick | £25–£45 |
| Minimum repair visit | £295 |
Flats (whole-block)
Flats (whole-block)| Flats (whole-block) | Guide price |
|---|
| Per flat, whole-block fill (low-rise) | £495–£995 |
New builds and extensions
New builds and extensions| New builds and extensions | Guide price |
|---|
| Full-fill batts supplied and fitted, per m² | £9–£16 |
| Partial-fill boards supplied and fitted, per m² | £14–£26 |
Commercial
Commercial| Commercial | Guide price |
|---|
| Commercial cavity fill, per m² (+VAT) | £22–£36 |
| Access towers or MEWP, per day (+VAT) | £195–£495 |
Loft insulation
Loft insulation| Loft insulation | Guide price |
|---|
| Loft insulation to 270mm, typical house | £395–£895 |
| Loft top-up from 100mm | £295–£595 |
Underfloor insulation
Underfloor insulation| Underfloor insulation | Guide price |
|---|
| Suspended timber floor, typical room | £795–£1,495 |
| Whole ground floor | £1,995–£3,995 |
Draught-proofing
Draught-proofing| Draught-proofing | Guide price |
|---|
| Whole-house draught-proofing | £195–£495 |
| Doors and loft hatch only | £145–£295 |
What changes the price
- Wall area: house type, storeys, gables and extensions.
- The system the survey specifies for your wall and exposure.
- Access: conservatories, lean-tos, three storeys or tight side passages.
- Repairs found at survey, always priced separately.
Market reference: the Energy Saving Trust puts a typical Great Britain install at around £2,200. Funded schemes have their own eligibility and installers; see grants in 2026.
Sources: Energy Saving Trust: cavity wall insulation; HMRC: VAT on energy-saving materials (Notice 708/6).