New Boiler Swindon: Compare Installation Quotes

Swindon has more detached houses than most towns its size: 22.3% of households in the 2021 Census. Bigger homes with two or more bathrooms often need something other than the combi that suits a smaller terrace, so get the type right before comparing prices.

Swindon at a glance

How homes are heated: 78.6% of Swindon households heat with mains gas only and 9.4% with electricity only. 545 homes (0.6%) use oil alone and 541 (0.6%) tank or bottled gas. Source
House types: In 2021, 30.7% of Swindon households lived in a semi, 29.0% in a terrace and 22.3% in a detached house. Flats of all kinds made up 17.8%. Source
Water hardness: Hard. Swindon's water comes from Thames Water, which classes the whole of its supply area as hard (over 200 mg/l calcium carbonate). Source
Council homes: Swindon Borough Council is running a £48m energy programme on its own homes from 2024 to 2029. A £10m heating contract covers around 1,800 homes, with 412 new A-rated condensing boilers fitted by March 2026. Source
Energy ratings: About 39% of homes with an EPC in Swindon are rated band D or below (median score 71, band C), against 47% across England. Based on certificates lodged in the 10 years to March 2025. Source

Combi, system or regular

A combi suits one bathroom and good mains flow. It heats water instantly and needs no tank.

A system boiler with an unvented cylinder is the usual choice for a detached house or a semi with an en suite. It stores hot water, so two showers can run together, and it suits a later move to a heat pump.

Keep a regular boiler if you have an older open-vented system and do not want to upgrade the pipework.

Hard water protection

Swindon is supplied by Thames Water, which classes all of its water as hard. Building Regulations guidance calls for scale protection on new combis in hard water areas, and a magnetic filter on the heating return protects any boiler. Make sure both appear on the quote.

Comparing quotes

A fair comparison needs the same boiler output, the same controls and the same warranty length. Check whether the quote includes a chemical flush of the old system, condensate pipe changes and Building Regulations notification.

Council tenants should not arrange this themselves. Swindon Borough Council is fitting A-rated condensing boilers across its housing under a five-year heating contract.

Swindon homes and what they need

Estates from the 1970s to today

Many houses from the 1990s onwards were built with a combi or system boiler already. A like-for-like swap is usually quick, but check the flue position still meets the rules if an extension or conservatory has been added nearby.

Victorian railway-era terraces

Space is tight, so a compact combi is common. If the old back boiler behind a fireplace is still in use, expect a bigger job with new pipework and a flue through an outside wall.

Postwar semis

These often have room for a cylinder in the airing cupboard. A system boiler keeps that space useful and makes a future heat pump easier.

Areas covered

Engineers who cover Swindon work across areas including Old Town, Wroughton, Highworth, Stratton St Margaret, Haydon Wick, Royal Wootton Bassett, Wichelstowe, Penhill, Freshbrook and Covingham.

View Swindon on Google Maps

Questions people in Swindon ask

Can I get a grant towards a gas boiler?

Not generally. Current schemes put the money into insulation and heat pumps instead. The Boiler Upgrade Scheme pays £7,500 towards a heat pump, so it is worth comparing quotes.

Sources

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