Swansea · SA1 · West Glamorgan
Fixed-price boiler quotes are online, and a Gas Safe registered engineer can be at your Swansea home or flat to fit yours – often as soon as the next day. Replacement gas boilers in Swansea cover combi swaps, system boilers, back boiler removals and full heating upgrades.
Swansea’s hillside terraces in Uplands and Townhill, villas in Sketty and seafront homes in Mumbles all bring different requirements. Across the SA postcodes we install Worcester Bosch, Vaillant, Ideal, Baxi and Viessmann boilers.
Hillside terraces are mostly combi swaps, and we check water pressure on the steeper streets before fitting. The Ideal Logic Max and Vaillant ecoFIT pure are reliable choices for these homes. Sketty villas with more bathrooms tend to suit a Worcester Bosch or Viessmann system boiler, while Mumbles seafront homes need flues placed with sea winds in mind.
Boiler prices in Swansea depend on the property. A hillside terrace in Uplands, a villa in Sketty and a seaside flat in Mumbles each need different boilers, and flue routes, pipework, cylinder choice and controls all move the figure. Like-for-like combi swaps start from £1,759 fitted, while Worcester Bosch Greenstar 4000 packages start from around £2,450. There’s no estimate to be revised later – the online quote is final. Parts and labour are already in the figure.
| Installation type | What’s involved | Price from | Time on site |
|---|---|---|---|
| Like-for-like combi swap | Replace an existing combi in the same position, with new flue, filter and controls | £1,759 | 1 day |
| Conventional or system to combi | Remove tanks and cylinder, cap off pipework, fit combi and upgrade gas supply if needed | £2,350 | 1–2 days |
| Back boiler replacement | Remove back boiler and fire, make good, fit new boiler in a new location | £2,795 | 2+ days |
| System boiler with cylinder | Suited to larger homes with multiple bathrooms; new or replacement unvented cylinder | £2,995 | 1–2 days |
| Boiler relocation | Move the boiler to a loft, garage or new room with new gas, flue and condensate runs | £2,250 | 1–2 days |
These are starting prices for a standard installation by a Gas Safe registered engineer; your online quote confirms the exact cost for your home.
Get a new boiler on finance in Swansea from £23.26 a month. As an example, a £1,799 boiler spread over 10 years at 9.9% APR works out at £23.26 per month. All subject to status, shorter terms, interest-free finance and buy now, pay later are also available. See our boiler finance options for the full details.
Swansea’s housing runs from hillside terraces to Gower villages. These are the jobs we fit most.
A compact combi saves space and tidies pipework, once pressure and the flue route have been checked.
A system boiler with a generous cylinder keeps hot water strong across several bathrooms.
A compact combi with a weather-resistant flue position, checked against lease and building rules first.
Local boiler installers
Swansea wraps around a wide bay, with the marina and city centre at the foot of steep hillsides lined with terraces in Uplands, Brynmill and Townhill. Victorian and Edwardian villas sit in Sketty, seaside homes line the road out to Mumbles, former steelworks and copper-industry terraces fill Morriston, and Gower villages lie just beyond the city. Wind from the bay is a feature of daily life.
Hillside terraces, villas and seaside flats call for different solutions. When we price boiler replacement in Swansea we survey the property, the flue route and the hot water demand first, so the fixed price is for a boiler that fits the home.
After you choose your boiler and date online, a Gas Safe registered engineer arrives to strip out the old boiler, fit and commission the new one, register the warranty and notify Building Control, so everything is signed off before they leave.
Swansea climbs from the bay up steep hillsides of terraces, with villas in Sketty and seaside homes at Mumbles. Here is what we see most.
Swansea’s water is soft, so scale is rarely a worry. A magnetic filter is the better protection, and we fit one on every installation.
Steep streets and narrow stairs affect access and cupboard space. We plan a compact boiler that fits and is serviceable.
Larger Victorian and Edwardian homes with several bathrooms suit a system boiler and cylinder.
Salt air and bay winds affect flue terminals and outside pipework. We choose positions and materials that cope, with conservation rules checked.
Older terraces often carry sludge in the system. We flush it, fit a filter and add modern controls.
Flats rely on compact combis and fixed flue positions. We check lease rules and building rules before quoting.
Our Gas Safe engineers cover the whole city, from the Marina and city centre to Uplands, Sketty, Mumbles, Morriston and Gorseinon. See all our service areas.
Red pin: Swansea town centre. Green pins: nearby towns we cover — tap a pin to see how far each town is from Swansea. The shaded circle shows roughly 8 miles around Swansea.
Other cities and towns we cover nearby include Cardiff (about 34 miles) and Bristol (about 59 miles).
Often as soon as the next day, depending on the boiler you choose and engineer availability in the SA1 area. Complete the online quote, choose when suits you, and homes without heating or hot water jump to the front of the queue.
All SA1 postcodes across Swansea, including Uplands, Sketty, Mumbles, Morriston and Townhill, plus nearby areas such as Gorseinon, Neath and Gower. Through a nationwide network of Gas Safe engineers, coverage extends beyond these places too.
Swansea’s water is supplied by Welsh Water and is soft. Scale is therefore less of a concern, so instead of a scale reducer we fit a magnetic filter that protects the boiler from sludge.
Yes. Back boiler removal covers the boiler, the fire, and making the old flue and pipework safe. We install a modern, efficient combi or system boiler in a position that suits the house. It usually takes a little longer than a straight swap. The engineer confirms how long it’ll take before starting.
A boiler replacement is notifiable under Building Regulations (Wales), which your Gas Safe registered engineer handles, followed by a compliance certificate. Planning permission is not normally needed for a like-for-like swap, but in Mumbles, Uplands and Sketty there are conservation areas, so check with Swansea Council before moving a flue to a front-facing wall.
Yes. Boiler finance in Swansea includes interest-free, 9.9% APR and buy now, pay later options, with deposits from £0 – see our boiler finance page. All finance is subject to status.
Yes. We take care of the old boiler – disconnected, removed and disposed of – and any tanks or cylinder made redundant by a combi.
All boilers we install come with a manufacturer-backed warranty, typically between 5 and 10+ years depending on the model. Keeping it valid usually means an annual service – our boiler cover plans take care of that for you.
Yes. If you’re off the gas network, we can replace an oil or LPG boiler too. Each fuel has its own registered installer: OFTEC (oil) or Gas Safe with LPG competence (LPG). See our oil boiler installation and replacement and LPG boiler installation and replacement pages for more detail.
Tell us about your home, see fixed-price replacement boiler packages for Swansea and book the installation date that suits you – all online, in a few minutes.