Home insulation in Plymouth
£512 to £7,975 installed, and 47% of homes in the council area rated EPC D to G.
What insulation costs in Plymouth
Loft only
£512–£1,221
Saves up to £233 a year. Pays back in about 3 years.
Loft + cavity walls (most common)
£2,014–£4,802
Saves up to £478 a year. Pays back in about 6 years.
Full package
£3,344–£7,975
Saves up to £546 a year. Pays back in about 9 years.
Source: Home Energy Quotes Cost Index, costs modelled September 2026, savings at the October to December 2026 price cap. Prices are estimates and include installation and VAT. Actual costs may vary.
Plymouth in numbers
Published statistics for the Plymouth council area, not our estimates.
47% of homes with an EPC in the Plymouth council area are rated D to G, and the median energy score is 69, which is band C. Plymouth has £3,024,995 of Warm Homes: Local Grant funding allocated in principle for April 2025 to March 2028.
| Plymouth council area | Figure | Source |
|---|---|---|
| Homes with an EPC rated D to G | 47% | ONS, EPCs lodged to March 2025 |
| Median EPC energy score | 69 (band C) | ONS, EPCs lodged to March 2025 |
| Warm Homes: Local Grant, 2025 to 2028 | £3,024,995 allocated to Plymouth | DESNZ, list updated July 2026 |
| Households on mains gas heating only | 80.9% | Census 2021, ONS |
| Electricity network operator | National Grid Electricity Distribution (South West England) | NESO licence area boundaries |
These are published official statistics for the Plymouth council area, which covers Plymouth, not Home Energy Quotes estimates. Sources checked 6 October 2026.
Is Plymouth a good place for home insulation?
The area’s housing stock includes a range of properties suited to home insulation installations throughout Plymouth. Combined with South West’s energy prices, home insulation installations here may offer good value (individual results will vary).
Plymouth has a population of 262,000, and the area falls within the South West region. We recommend getting at least 3 quotes to compare prices.
Find Installers in Plymouth
We recommend getting at least 3 quotes from qualified installers before making a decision. Check reviews, ask for local references, and make sure warranties are clearly stated in writing.
What to check before hiring an installer in Plymouth
- Qualifications — check the installer holds relevant qualifications and certifications for home insulation before signing any contract
- Local references — ask for completed jobs in Plymouth or Devon
- Reviews — check online reviews before committing
- Warranty — product and workmanship warranties should be clearly stated in writing
- 3 quotes minimum — we recommend comparing at least three quotes to ensure you get a fair price
Questions about home insulation in Plymouth
How much does home insulation cost in Plymouth?
How energy efficient are homes in Plymouth?
Is there a grant for home insulation in Plymouth?
The Warm Homes: Local Grant may fund insulation and low-carbon heating in Plymouth for homes in England with an EPC rating of D to G, where household income is usually £36,000 or less or someone receives certain benefits.
How long is the payback period in Plymouth?
Do I need planning permission in Plymouth?
How do I find a good installer in Plymouth?
Get quotes for your home in Plymouth
Up to three approved installers who cover Plymouth may contact you. Free, no obligation.
Plymouth on the map
Home Insulation in nearby towns
Last reviewed: . Costs are modelled estimates from the Home Energy Quotes Cost Index — see how we calculate them. Grant rates are checked against GOV.UK.