Gas Safe combi, system, and conventional boiler installs from £2,500 + VAT
A new boiler should run quietly, heat evenly, and last well over a decade. We install combi, system, and conventional boilers across Wimbledon, Sutton, and South London, working directly with each homeowner from first survey to final commissioning. Every installation is carried out by Gas Safe registered engineers with over twenty years of hands-on heating experience.
Before quoting we look at your existing pipework, hot water demand, and how you actually live in the property. That picture decides which manufacturer and which spec we recommend, not a one-size catalogue price. You get a clear written quote, fixed dates, and a tidy site at the end of every day on the job.
Combi swap installations typically run from £2,500 to £3,500 plus VAT, with full system upgrades and conventional setups going up to £4,500 plus VAT for larger or more involved homes. The price covers the boiler, the install, removal of the old unit, system flush where needed, and warranty registration. No hidden extras after the job is booked.
Once the new boiler is on the wall we run a full commissioning sequence, set the controls to suit your habits, and walk you through how everything works. You leave with the warranty paperwork, the benchmark certificate, and a number to call if anything ever needs a follow-up visit.
Andy
David is always my first port of call for any plumbing and heating queries, installations and maintenance. He's worked on 5 residential properties for me over the last 10 years. I trust him implicitly and wouldn't hesitate to recommend him to anyone.
Cathryn O'Hare
David has regularly carried out all of our plumbing and heating work over the past 14 years and has also fitted new bathrooms for us. He always attends as quickly as he can, is very knowledgeable, trustworthy and helpful - we'd highly recommend him
Amanda Crowson
Used several times, including fitting brand-new boilers more than once on different properties. Very reliable, very knowledgeable and would thoroughly recommend.
Charlotte Duff
We've used David Oliver for all our plumbing needs over the years - he's very knowledgeable, reliable, and trustworthy. Highly recommended!
Sonia Higgs
David Oliver is our go-to plumber. He installed our new boiler and handles all the plumbing work around our home. He works cleanly and leaves everything tidy, and his communication is excellent—so we always know exactly what to expect, with no surprises. We wouldn’t use anyone else.
Paula Sim
Very happy with the work done. I had a new boiler installed and David did a quick and tidy job. The new boiler is so much better and more energy efficient. David took the time to explain all the updated features. Can’t recommend him enough!
Emma Wilson
David is smart, responsive and proactive. I have used him for a number of years for various plumbing and boiler issues. Wouldn't hesitate to recommend.
Melanie Sheen
I used Dave to replace my boiler. He was very responsive and did an excellent job. Would definitely recommend this company.
Sabah Ali
I have known David for many years now .He is brilliant & very knowledgeable. No job is too small or big & always makes time in an emergency .İ use David both for my GP surgery work place & home . I would highly recommend David to anyone 👍 farina
We cover Wimbledon, Sutton, Cheam, Mitcham, Carshalton, Morden, Worcester Park, Raynes Park, and the surrounding South London and Surrey villages. If you are nearby and unsure, give us a call on 07947 336 802 and we will confirm whether your postcode is on our regular round.
David Oliver has been working on heating and plumbing systems across South London and Surrey for over twenty years, starting in the building trade at fourteen. Comfort Heating Wimbledon is the trading name he runs the business under today, and he attends every job personally.
Yes. We are Gas Safe registered, which is the UK legal requirement for any work on gas appliances. Each engineer carries a Gas Safe ID card you can ask to see at the door, and we keep our registration current on every category we work in.
Standard hours are Monday to Saturday, 08:00 to 18:00. We are closed on Sundays and we do not run a 24-hour service, but we do prioritise heating and hot-water emergencies during normal hours where the diary allows.
Yes. Boiler installations and any planned heating work are quoted free with no obligation. Call us on 07947 336 802 or send your details through the quote form and we will come back with a clear written price.
We accept bank transfer, debit and credit cards, and cash. Payment is taken on completion for repairs and small jobs. Larger installations are split into a deposit on booking, a stage payment when the job starts, and the balance on commissioning.
Boiler installations sit between £2,500 and £4,500 plus VAT. A straight combi-for-combi swap is usually £2,500 to £3,500 plus VAT. System upgrades, conventional swaps, and homes with poor existing pipework are quoted at the higher end. Every quote is fixed in writing before any work starts.
A like-for-like combi swap normally takes one full working day. A first-time combi conversion or a full system upgrade typically takes two to three days. We confirm the timeline in the written quote so you can plan around the work.
We install all the major UK brands including Worcester Bosch, Vaillant, Baxi, Ideal, and Glow-worm. The right choice depends on the warranty length you want, the size of the property, and your budget. We talk you through the trade-offs as part of the quote.
Yes. Removal of the old unit, the cylinder where relevant, and any redundant pipework is included as part of the installation price. Everything is taken away for safe disposal so you do not need to organise a separate collection.
All new boilers come with a manufacturer-backed warranty. Length depends on the model and brand, with most landing between five and twelve years on parts and labour. We register the warranty in your name on the day of commissioning.
We do not run a finance plan in-house. We keep our pricing competitive and our quotes fixed, and we are happy to stage payments across the install for larger projects. A few customers also use a 0 percent purchase credit card from their own bank for short-term spreading.
Repairs run from £100 to £500 plus VAT depending on the fault and the part involved. Common faults like a faulty diverter or a leaking pump usually sit at the lower end. We diagnose first, then quote in writing before fitting any new parts.
In most cases yes. We carry common spares for Worcester, Vaillant, Baxi, and Ideal in the van. If the fault needs a manufacturer-specific part, we order it the same day and book a return visit as soon as the part lands, which is normally within 24 to 48 hours.
There is a call-out fee that covers the engineer's time on site for the diagnosis. If you choose to go ahead with the repair, the call-out is rolled into the final repair price. If the repair is uneconomic and you decide not to proceed, only the call-out is charged.
We work on every major UK brand including Worcester Bosch, Vaillant, Baxi, Ideal, Glow-worm, Potterton, and Vokera. If your boiler is something rarer, give us a call before booking and we will let you know honestly whether we can support it or whether you are better off with a manufacturer engineer.
Yes. We provide annual Landlord Gas Safety Certificates (CP12) across Wimbledon, Sutton, and the surrounding South London patch. The inspection covers every gas appliance in the property and the certificate is issued on the day of the visit.
Manufacturers require an annual service to keep the warranty valid. A yearly check also catches small faults before they become winter break-downs and keeps efficiency where it should be. Autumn is the busiest service window so we recommend booking by September.