Boilers in Swansea

Q: How much do boilers cost in Swansea?

Boilers in Swansea typically cost between £1,510 and £4,990 installed, depending on system size (modelled estimate). A typical mid-range system costs around £2,620. Actual costs vary depending on property and installer.

Q: How do I find a good installer in Swansea?

We recommend getting at least 3 quotes from qualified installers. Check online reviews and verify that the installer holds relevant qualifications before signing any contract.

£1,510 to £4,990 installed, and 53% of homes in the council area rated EPC D to G.

Request a free quote See the local data

By Home Energy Quotes · Updated September 2026 · Swansea, West Glamorgan

What a new boiler costs in Swansea

24–30kW combi

£1,510–£2,100

Saves up to £174 a year. Pays back in about 10 years.

35–40kW system (most common)

£2,110–£3,220

Saves up to £230 a year. Pays back in about 12 years.

40kW+ heat-only

£3,240–£4,990

Saves up to £334 a year. Pays back in about 12 years.

Source: Home Energy Quotes Cost Index, costs modelled March 2026, savings at the October to December 2026 price cap. Prices are estimates and include installation and VAT. Actual costs may vary.

Swansea in numbers

Published statistics for the Swansea council area, not our estimates.

At the 2021 Census, 80.3% of households in the Swansea council area used mains gas as their only central heating, 1.9% oil only and 5.6% electricity only. 53% of homes with an EPC in the Swansea council area are rated D to G, and the median energy score is 68, which is band D.

Swansea council area	Figure	Source
Households on mains gas heating only	80.3%	Census 2021, ONS
Households on oil heating only	1.9%	Census 2021, ONS
Households on electric heating only	5.6%	Census 2021, ONS
Homes with an EPC rated D to G	53%	ONS, EPCs lodged to March 2025
Median EPC energy score	68 (band D)	ONS, EPCs lodged to March 2025
Electricity network operator	National Grid Electricity Distribution (South Wales)	NESO licence area boundaries

These are published official statistics for the Swansea council area, which covers Swansea, not Home Energy Quotes estimates. Sources checked 6 October 2026.

Grants and funding in Swansea

No general boiler grant

There is no general grant for a like-for-like boiler replacement in Swansea. If your home has no working heating and you receive a means-tested benefit or live in a low-income household, Nest may repair or replace the boiler. Switching to a heat pump can qualify for the Boiler Upgrade Scheme, worth up to £7,500.

Source: Welsh Government — Nest

Standard VAT

Boilers are not on HMRC's list of energy-saving materials, so 20% VAT applies and is inside the prices above.

Source: HMRC — VAT Notice 708/6

Is Swansea a good place for boilers?

The area’s housing stock includes a range of properties suited to boilers installations throughout Swansea. Combined with Wales’s energy prices, boilers installations here may offer good value (individual results will vary).

Swansea has a population of 241,000, and the area falls within the Wales region. We recommend getting at least 3 quotes to compare prices.

Find Installers in Swansea

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.

Request a free quote →

What to check before hiring an installer in Swansea

Qualifications — check the installer holds relevant qualifications and certifications for boilers before signing any contract
Local references — ask for completed jobs in Swansea or West 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 boilers in Swansea

How much do boilers cost in Swansea?

Boilers in Swansea cost between £1,510 and £4,990 installed, depending on system size. A typical mid-range system costs around £2,620 including installation and VAT (modelled estimate).

How are homes in Swansea heated?

At the 2021 Census, 80.3% of households in the Swansea council area, which covers Swansea, used mains gas as their only central heating, 1.9% oil only and 5.6% electricity only.

Is there a grant for boilers in Swansea?

How long is the payback period in Swansea?

The estimated payback period in Swansea is typically around 13 years, based on estimated savings of up to £202 a year for a typical home. Actual payback depends on your property size, boiler efficiency and gas tariff.

Do I need planning permission in Swansea?

Most boilers installations fall under permitted development rights and do not require planning permission. However, listed buildings, conservation areas and flats may need approval. Always check with your local planning authority in Swansea before installation.

How do I find a good installer in Swansea?

We recommend getting at least 3 quotes from qualified installers. Check online reviews and verify that the installer holds relevant qualifications before signing any contract.

Get quotes for your home in Swansea

Up to three approved installers who cover Swansea may contact you. Free, no obligation.

Request a free quote

Swansea on the map

Swansea, West Glamorgan and the surrounding area.

Boilers in nearby towns

Last reviewed: 15 September 2026. Costs are modelled estimates from the Home Energy Quotes Cost Index — see how we calculate them. Grant rates are checked against GOV.UK.