Wandsworth · SW18 · Greater London
Quote online, pick your boiler and have a Gas Safe registered engineer install it at your Wandsworth home or flat – next-day fitting is often possible. Replacement gas boilers in Wandsworth cover combi swaps, system boilers, back boiler removals and complete heating upgrades.
Wandsworth is full of Victorian terraces, converted flats and larger villas in Putney and around the commons. Across SW11, SW12, SW15, SW17 and SW18 we install Worcester Bosch, Vaillant, Ideal, Baxi and Viessmann boilers.
In converted flats, freeholder consent for a new flue position can shape which boiler we fit, and a compact Vaillant ecoFIT pure gives flexibility. Victorian terraces with a loft tank are often converted to a combi. Larger villas in Putney with three or more bathrooms usually need a Viessmann or Worcester Bosch system boiler and unvented cylinder.
Boiler prices in Wandsworth depend on the building. A Victorian terrace flat in Clapham Junction, a Putney villa and an estate flat in Roehampton each need different boilers, and flue routes, pipework, cylinder choice and controls change the figure. Like-for-like combi swaps start from £1,759 fitted, while Worcester Bosch Greenstar 4000 packages start from around £2,450. What you see online is what you’re charged. The number you were quoted is the number on the final bill.
| 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 Wandsworth 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 plus interest-free and buy now, pay later options are available, subject to status. See our boiler finance options for the full details.
Wandsworth’s housing is mostly Victorian terraces, villas and flats. These are the jobs we fit most, and what usually suits each.
A compact combi saves space and avoids a cylinder. We check the flue exit and your lease before we recommend one.
Family terraces with two bathrooms often suit a system boiler, so showers stay strong while the kitchen tap runs.
Large period houses need a boiler sized to the whole home, and a flue route that respects the front elevation.
Local boiler installers
Wandsworth is one of London’s largest inner boroughs, running from the riverside developments at Nine Elms and Battersea through the Victorian terraces around Clapham Junction, Balham and Tooting to the villas of Putney and the post-war estates at Roehampton. Nearly every street is some version of a Victorian or Edwardian terrace, and a large share has been converted into flats.
Converted terraces often have a boiler in a cramped kitchen cupboard, with limited flue routes and a freeholder to consult. When we price new boiler installation in Wandsworth we check the flue exit, the pipework and the hot water demand first, so the fixed price covers the right boiler for the building.
Pick your boiler and date online and a Gas Safe registered engineer removes the old boiler, fits and commissions the new one, flushes the system and registers the guarantee, with Building Control notified before they leave.
Wandsworth is packed with Victorian terraces, converted flats and a few big estates, and each calls for a different approach. Here is what we see most.
Wandsworth tap water is very hard, so scale builds quickly inside combi boilers. Where hardness in your postcode is above 200ppm, we fit a scale reducer with a combi boiler.
Terraces split into flats often have tight boiler cupboards and original pipework. We survey the whole system before quoting.
Moving or replacing a flue on a converted building may need the freeholder’s agreement. We check the lease position at survey.
Bigger houses in Putney and Wandsworth Common often need a system boiler and unvented cylinder for several bathrooms.
Post-war estates may have communal systems or rules on individual boilers. We check what the building allows before recommending anything.
Newer flats at Nine Elms and Battersea may have specified boilers and warranty conditions. We work within them.
Our Gas Safe engineers cover the whole borough, from Battersea and Clapham Junction to Putney, Balham, Tooting and Roehampton. See all our service areas.
Red pin: Wandsworth town centre. Green pins: nearby towns we cover — tap a pin to see how far each town is from Wandsworth. The shaded circle shows roughly 8 miles around Wandsworth.
We also cover London as a whole, plus neighbouring Merton (about 2 miles), Lambeth (about 3 miles) and Richmond upon Thames (about 5 miles).
Often as soon as the next day, depending on the boiler you choose and engineer availability in the SW18 area. Complete the online quote, select a date that fits, and if there’s no heating or hot water we prioritise your booking.
All SW18 postcodes plus SW11, SW12, SW15, SW17 and SW19, including Battersea, Putney, Balham, Tooting and Earlsfield, and nearby areas such as Lambeth, Merton and Richmond. We are part of a nationwide network of Gas Safe engineers, so we can cover the wider area as well.
Wandsworth tap water is very hard, normally above 200ppm. You can check your postcode on your supplier’s hardness checker. Where it exceeds 200ppm, we fit a scale reducer with a combi boiler, in line with Building Regulations guidance.
Yes. We strip out the back boiler and fire, seal the old flue and pipework, and make everything safe before the new boiler goes in. A modern condensing combi or system boiler then goes in a more suitable position. Allow a little longer than for a straight swap. We’ll give you the likely timescale before work begins.
A boiler replacement is notifiable under Building Regulations, which your Gas Safe registered engineer handles through Building Control, followed by a compliance certificate. Planning permission is not normally needed for a like-for-like swap, but around Wandsworth Common, Putney and Battersea there are conservation areas, so check with Wandsworth Council before putting a flue on a front wall.
Yes. Boiler finance in Wandsworth 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. Disposal is included: your old boiler, and any tanks or cylinder no longer needed after a combi conversion, are removed safely.
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 there’s no mains gas at your property, we can fit an oil or LPG replacement. Oil boilers are installed by OFTEC registered engineers and LPG boilers by Gas Safe registered LPG-competent engineers. 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 Wandsworth and book the installation date that suits you – all online, in a few minutes.