Heat pumps in Cardiff
£6,720 to £18,110 installed, and 267 Boiler Upgrade Scheme grants already paid in the council area.
What a system costs in Cardiff
6kW
£6,720–£8,610
Saves up to £226 a year. Pays back in about 1 year after the £7,500 grant (34 years without it).
9kW (most common)
£9,330–£11,580
Saves up to £332 a year. Pays back in about 9 years after the £7,500 grant (31 years without it).
14kW
£12,360–£18,110
Saves up to £464 a year. Pays back in about 17 years after the £7,500 grant (33 years without it).
Source: Home Energy Quotes Cost Index, costs modelled July 2026, savings at the October to December 2026 price cap. Prices are estimates and include installation and VAT. Actual costs may vary.
Cardiff in numbers
Published statistics for the Cardiff council area, not our estimates.
267 Boiler Upgrade Scheme heat pump grants were paid in the Cardiff council area between May 2022 and June 2026. At the 2021 Census, 78.4% of households in the Cardiff council area used mains gas as their only central heating, 0.1% oil only and 10.4% electricity only.
| Cardiff council area | Figure | Source |
|---|---|---|
| Boiler Upgrade Scheme heat pump grants paid | 267 | DESNZ and Ofgem, May 2022 to June 2026 |
| Households on mains gas heating only | 78.4% | Census 2021, ONS |
| Households on oil heating only | 0.1% | Census 2021, ONS |
| Households on renewable heating only | 0.1% | Census 2021, ONS |
| Homes with an EPC rated D to G | 42% | ONS, EPCs lodged to March 2025 |
| Electricity network operator | National Grid Electricity Distribution (South Wales) | NESO licence area boundaries |
Cardiff is served by National Grid Electricity Distribution, the electricity network operator for South Wales. A heat pump has to be registered with the network operator. Your installer normally does this: smaller systems are notified after installation, and larger ones need approval before work starts.
These are published official statistics for the Cardiff council area, which covers Cardiff, not Home Energy Quotes estimates. Sources checked 6 October 2026.
Is Cardiff a good place for heat pumps?
The area’s housing stock includes a range of properties suited to heat pumps installations throughout Cardiff. Combined with Wales’s energy prices, heat pumps installations here may offer good value (individual results will vary).
Cardiff has a population of 362,000, and the area falls within the Wales region. We recommend getting at least 3 quotes to compare prices.
Find Installers in Cardiff
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 Cardiff
- Qualifications — check the installer holds relevant qualifications and certifications for heat pumps before signing any contract
- Local references — ask for completed jobs in Cardiff or South Glamorgan
- 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 heat pumps in Cardiff
How much do heat pumps cost in Cardiff?
How many heat pump grants have been paid in Cardiff?
Is there a grant for heat pumps in Cardiff?
The Boiler Upgrade Scheme offers up to £7,500 towards an air source or ground source heat pump in Cardiff, or £9,000 until March 2027 for homes heated by oil or LPG with no mains gas. It is open to property owners in England and Wales.
How long is the payback period in Cardiff?
Do I need planning permission in Cardiff?
How do I find a good installer in Cardiff?
Get quotes for your home in Cardiff
Up to three approved installers who cover Cardiff may contact you. Free, no obligation.
Cardiff on the map
Heat Pumps 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.