Cardiff · CF10 · Wales
Get a fixed-price quote for a new boiler online and have a Gas Safe registered engineer fit it at your Cardiff home or flat – often as soon as the next day. Replacement gas boilers in Cardiff cover combi swaps, system boilers, back boiler removals and complete heating upgrades.
Worcester Bosch Greenstar 4000
Ideal Logic MAX Combi C30
Vaillant EcoFit Pure 830C 30kW
Baxi 830 Combi 2 30kW
Boiler prices in Cardiff depend on the building. A flat in Cardiff Bay, a terrace in Cathays and a villa in Llandaff each need different boilers, and flue routes, pipework, cylinder choice and controls all move the final figure. Like-for-like combi swaps start from £1,759 fitted, while Worcester Bosch Greenstar 4000 packages start from around £2,450. Every quote you get online is fixed – no surprise extras on the day.
| 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 Cardiff 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. Shorter terms, interest-free and buy now, pay later options are also available, all subject to status. See our boiler finance options for the full details.
Cardiff’s housing mixes Victorian terraces, Edwardian villas and modern flats. These are the jobs we fit most.
A compact combi suits most terraces, tidying old pipework and freeing cupboard space once pressure is checked.
A system boiler and unvented cylinder keep hot water strong across several bathrooms.
A compact combi in a cupboard keeps the footprint small, with the flue exit and building rules checked first.
Fill out our simple online enquiry form. We just need a few details about your home to give you quotes for new boilers online.
Select a gas boiler package that fits your specific needs. You have the option to pay up-front, or with instalments on finance.
Next you will be able to choose a convenient boiler installation date. One of our Gas Safe engineers will complete installation of your new boiler.
You can choose from one of our boiler servicing plans, giving you peace of mind and keeping your boiler running smoothly for years to come.
Local boiler installers
Cardiff is the capital of Wales, with long rows of Victorian terraces in Cathays, Roath and Canton, Edwardian villas around Roath Park and Llandaff, 1930s semis in Whitchurch and Llanishen, and post-war estates in Ely and Rumney. Cardiff Bay has been rebuilt with apartments, and the city is spread along the River Taff.
Terraces, villas and apartments each need a different boiler approach, and many homes sit in flood-aware areas near the river and bay. When we price replacement boilers in Cardiff we survey the building, check the flue route and look at hot water demand first, so your fixed price covers a boiler that suits it.
Pick your boiler and date online and a Gas Safe registered engineer arrives to remove the old unit, fit and commission the new one, register the warranty and notify Building Control, so the paperwork is done before they leave.
Cardiff has long Victorian terraces, Edwardian villas and new waterfront flats. Here is what we see most.
Cardiff’s water is generally soft, so scale is less of a problem than in the south-east. We check your postcode and still fit a magnetic filter to protect the system.
Long terraces often have original pipework and cramped boiler spots, and many are rented to students. We survey and fit a compact condensing boiler.
Larger Edwardian houses usually need a system boiler and cylinder, with discreet flue routes in the conservation areas.
Waterfront apartments may have specified boilers and lease rules. We check building requirements before we recommend a boiler.
Low-lying areas near the Taff, Ely and the bay can flood. We position boilers above ground level where possible.
Many Cardiff homes are rented. We supply the paperwork and commissioning certificates landlords need.
Our Gas Safe engineers cover the whole city, from the city centre and Cardiff Bay to Roath, Canton, Llandaff, Whitchurch and Penarth. See all our service areas.
Red pin: Cardiff town centre. Green pins: nearby towns we cover — tap a pin to see how far each town is from Cardiff. The shaded circle shows roughly 8 miles around Cardiff.
Other cities and towns we cover nearby include Bristol (about 29 miles), Birmingham (about 102 miles) and Leicester (about 135 miles).
Often as soon as the next day, depending on the boiler you choose and engineer availability in the CF10 area. Complete the online quote, pick a date that suits you, and if you have no heating or hot water we prioritise your booking.
All CF10 postcodes across Cardiff, including Roath, Cathays, Canton, Llandaff and Whitchurch, plus nearby areas such as Penarth, Barry and Caerphilly. As part of a nationwide network of Gas Safe engineers, we also cover the wider area.
Cardiff’s water is generally soft, so scale is less of an issue and many homes need no scale reducer. You can check your postcode on your supplier’s hardness checker. Where levels are above 200ppm we fit one with a combi boiler, and we always protect the system with a filter.
Yes. We remove the back boiler and associated fire, make the old flue and pipework safe, and install a modern condensing combi or system boiler in a more suitable position. This usually takes a little longer than a straight swap, and we’ll confirm the timescale before we start.
A boiler replacement is notifiable under Building Regulations in Wales, which your Gas Safe registered engineer handles, with a compliance certificate afterwards. Planning permission is not normally needed for a like-for-like swap, but in Llandaff, Pontcanna and Roath there are conservation areas, so check with Cardiff Council before moving a flue to a front-facing wall.
Yes. Boiler finance in Cardiff 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. Your engineer will safely disconnect, remove and dispose of your old boiler, and any redundant tanks or cylinder if you’re switching to 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 your home is off the mains gas network, we can replace an oil or LPG boiler. Oil boilers are fitted by OFTEC registered engineers and LPG boilers by Gas Safe registered engineers with LPG competence. 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 Cardiff and book the installation date that suits you – all online, in a few minutes.