Double glazing in Swansea

Q: How much does double glazing cost in Swansea?

Double Glazing in Swansea typically costs between £1,870 and £11,060 installed, depending on system size (modelled estimate). A typical mid-range system costs around £5,060. 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.

£1,870 to £11,060 installed, and 53% of homes in the council area rated EPC D to G.

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

What double glazing costs in Swansea

4–6 windows

£1,870–£3,330

Saves up to £69 a year. Pays back in about 38 years.

Full house (most common)

£3,660–£6,010

Saves up to £108 a year. Pays back in about 45 years.

Large home package

£6,980–£11,060

Saves up to £162 a year. Pays back in about 56 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.

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. 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.

Swansea council area	Figure	Source
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
Households on mains gas heating only	80.3%	Census 2021, ONS
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.

Is Swansea a good place for double glazing?

The area’s housing stock includes a range of properties suited to double glazing installations throughout Swansea. Combined with Wales’s energy prices, double glazing 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.

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What to check before hiring an installer in Swansea

Qualifications — check the installer holds relevant qualifications and certifications for double glazing 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 double glazing in Swansea

How much does double glazing cost in Swansea?

Double Glazing in Swansea costs between £1,870 and £11,060 installed, depending on system size. A typical mid-range system costs around £5,060 including installation and VAT (modelled estimate).

How energy efficient are homes in Swansea?

53% of homes with an EPC in the Swansea council area, which covers Swansea, are rated D to G, and the median energy score is 68, which is band D.

Is there a grant for double glazing in Swansea?

There is no general grant for double glazing in Swansea, and windows do not qualify for 0% VAT. Green Homes Wales offers interest-free loans that can include high-performance glazing.

How long is the payback period in Swansea?

The estimated payback period in Swansea is typically around 49 years, based on estimated savings of up to £104 a year for a typical home. Actual payback depends on your number of windows, property size and current glazing type.

Do I need planning permission in Swansea?

Most double glazing 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.

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Swansea on the map

Swansea, West Glamorgan and the surrounding area.

Double Glazing 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.