Insulation in Northampton
£473 to £7,367 installed, and 43% of homes in the council area rated EPC D to G.
What insulation costs in Northampton
Loft only
£473–£1,128
Saves up to £233 a year. Pays back in about 3 years.
Loft + cavity walls (most common)
£1,860–£4,436
Saves up to £478 a year. Pays back in about 6 years.
Full package
£3,089–£7,367
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.
Northampton in numbers
Published statistics for the West Northamptonshire council area, not our estimates.
43% of homes with an EPC in the West Northamptonshire council area are rated D to G, and the median energy score is 70, which is band C. West Northamptonshire has £2,606,931 of Warm Homes: Local Grant funding allocated in principle for April 2025 to March 2028.
| West Northamptonshire council area | Figure | Source |
|---|---|---|
| Homes with an EPC rated D to G | 43% | ONS, EPCs lodged to March 2025 |
| Median EPC energy score | 70 (band C) | ONS, EPCs lodged to March 2025 |
| Warm Homes: Local Grant, 2025 to 2028 | £2,606,931 allocated to West Northamptonshire | DESNZ, list updated July 2026 |
| Households on mains gas heating only | 72.9% | Census 2021, ONS |
| Electricity network operator | National Grid Electricity Distribution (East Midlands) | NESO licence area boundaries |
These are published official statistics for the West Northamptonshire council area, which covers Northampton, not Home Energy Quotes estimates. Sources checked 6 October 2026.
Is Northampton a good place for insulation?
The area’s housing stock includes a range of properties suited to insulation installations throughout Northampton. Combined with East Midlands’s energy prices, insulation installations here may offer good value (individual results will vary).
Northampton has a population of 243,520, and the area falls within the East Midlands region. We recommend getting at least 3 quotes to compare prices.
Find Installers in Northampton
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 Northampton
- Qualifications — check the installer holds relevant qualifications and certifications for insulation before signing any contract
- Local references — ask for completed jobs in Northampton or Northamptonshire
- 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 insulation in Northampton
How much does insulation cost in Northampton?
How energy efficient are homes in Northampton?
Is there a grant for insulation in Northampton?
The Warm Homes: Local Grant may fund insulation and low-carbon heating in Northampton 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 Northampton?
Do I need planning permission in Northampton?
How do I find a good installer in Northampton?
Get quotes for your home in Northampton
Up to three approved installers who cover Northampton may contact you. Free, no obligation.
Northampton on the map
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.