Clapham, LondonSouth and west London
Boiler service in Clapham
For a boiler service in Clapham, book a yearly visit from a Gas Safe registered engineer and tell them where the boiler sits. In SW4 that is often a kitchen cupboard or loft in a converted Victorian terrace. The service checks gas, flue and combustion, and on combis the hot water flow, because Clapham's Thames Water supply is hard.
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Tell us the boiler and the street in Clapham. You get a reply to arrange a day.
Homes in Clapham
Clapham is mostly Victorian and Edwardian terraces around Clapham Common, Clapham Old Town and the streets towards Clapham North and Abbeville Village. Many of the bigger houses were split into two or three flats, so the boiler is usually a combi tucked into a kitchen or hall cupboard, with a flue through the back or side wall. Clapham is split between Lambeth and Wandsworth councils, and there is a large share of rented flats, so landlord gas safety checks are a big part of the work here.
Converted flats and cupboard boilers
In a split Victorian house the boiler went wherever there was room when the flats were created. You find combis in kitchen wall units, in cupboards on half landings and in lofts above top floor flats. That affects a service in two ways. The engineer needs space to take the case off and clean inside, and the flue route needs checking to the outside.
Where a flue runs through a back addition or across a shared wall, the terminal outside must still be clear of windows, vents and neighbours' new extensions. Clapham has a lot of rear extensions and loft conversions. A flue that met the rules when it was fitted can end up too close to a new window or rooflight. The engineer checks this at the service.
If you live in an upper flat with the boiler in the loft space, tell us when you book. A safe ladder, boarding and light make the visit quicker and safer.
Hard water in SW4
Clapham is supplied by Thames Water, which says all the water in its region is hard. In a combi, scale builds up in the plate heat exchanger that heats tap water. Signs are a shower that swings hot and cold, a weaker hot tap than cold tap, and a rumbling noise when you run hot water.
At a Clapham service we run the hot tap and check flow and temperature, then check any scale reducer on the cold feed. It is often the first place a combi in a busy flat starts to struggle.
Landlords and lettings around the Common
Clapham has a lot of flat shares and lets. Landlords need a gas safety check every 12 months on each gas appliance and flue, with a copy to tenants within 28 days, under HSE rules. Since 2018 you can have it done up to two months early and keep the same expiry date, which helps line it up with a change of tenants in summer. Many landlords book the gas safety check and a full service at the same visit.
Tell us the flat number and floor, where the boiler is, and whether there is a parking permit or a resident bay nearby. Many Clapham streets sit in controlled parking zones run by Lambeth or Wandsworth, and a clear note about parking helps the engineer arrive on time. If you share a building, let the other flats know a gas engineer is visiting, as the gas meter may be in a shared cupboard or basement. Spring and summer are the easiest months to book.
Most asked for
in Clapham.
Each one has its own page with what is checked, how the visit runs and what affects the price.

Annual boiler service
A full yearly service with a combustion test and a written record you can keep for your warranty.
PriceConfirmed when you book
See the service
Combi boiler service
Full yearly service for combis, with hot water flow and scale checks for London's hard water.
PriceConfirmed when you book
See the service
Landlord service + CP12
The yearly landlord gas safety check and record, with a full boiler service at the same visit if you want it.
PriceConfirmed when you book
See the serviceMy boiler is in a kitchen cupboard. Is that allowed?
Yes, modern room sealed boilers can go in cupboards as long as the maker's clearances are met and the engineer can get at it to service. Clear the cupboard before the visit.
Who supplies water in Clapham?
Thames Water. It classes the water across its region as hard, which matters for combi boilers.
Can you do landlord checks with tenants in place?
Yes. Give us the tenant contact and we arrange a time. The record goes to you to pass on within 28 days.
Reading for
Clapham homes.
All adviceBoiler in a cupboard: the rules for London flats
Read the short answer
Worcester Bosch boiler service: what to expect
Read the short answer
Gas safety check vs boiler service: what is the difference?
Read the short answer
Clapham.
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Send your boiler details and a day that suits you. The visit and the price are confirmed with you.
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