Your London boiler experts — repairs, servicing & new installations.
Same-day boiler repairs and fully-fitted A-rated installations from £1,895. Gas Safe registered engineers, transparent fixed pricing, up to 10-year warranty.
Get your boiler quote
Fast callback. Fixed pricing. No obligation.
Sound familiar? We've fixed it before.
Whatever your boiler is doing (or not doing), our Gas Safe engineers will diagnose, quote and usually repair on the same visit.
No heating or hot water
Cold radiators, lukewarm showers — most causes diagnosed in under an hour.
Low pressure or repeated resets
Constant top-ups usually mean a leak or expansion vessel issue. We find and fix it.
Pilot light keeps going out
Often a thermocouple, gas valve or flue issue. Safe diagnosis the same day.
Banging, whistling or kettling
Limescale or pump issues. We flush, repair or recommend if needed.
Error codes on the display
We know every major brand's fault codes inside out — fast, accurate repairs.
Boiler is over 10 years old
Older units cost more to run. We'll be honest if a replacement saves you money.
Fitted right, the first time.
How a new boiler install works
Simple, transparent, and built around your schedule.
- 01
Free home survey
We visit (or video-survey), assess your system, and recommend the right boiler for your home and budget.
- 02
Fixed written quote
Transparent price including boiler, parts, labour, removal and certification. No nasty surprises.
- 03
Installation day
Tidy, respectful work by Gas Safe engineers. Most combi swaps done in a single day.
- 04
Commission & warranty
We register your warranty (up to 10 years), demo the controls, and clean up properly.
No hidden fees. Ever.
Indicative starting prices — every job confirmed in writing before any work begins.
Boiler Repair
First-hour diagnosis & fix
- Same-day callout (most areas)
- All major brands
- Honest fault diagnosis
- Parts at trade pricing
- 12-month workmanship guarantee
New Combi Boiler
Supplied & fully fitted
- A-rated combi boiler
- Like-for-like swap
- System flush included
- Up to 10-year warranty
- All certification & Building Control notification
Annual Service & CP12
Service or landlord cert
- Full visual & performance check
- Combustion analysis
- Cleaning of key components
- Written report
- Landlord CP12 emailed same day
The London boiler team you can actually trust
Gas Safe Registered
Every engineer on every job. Required by law for gas work — we wouldn't have it any other way.
Approved installers
Worcester Bosch, Vaillant, Ideal & more — meaning longer warranties and better support for you.
Fast, reliable response
Same-day repairs in most London postcodes. We turn up when we say we will.
Honest fixed pricing
You'll know the price before we start. We'd rather lose a job than spring extras at the end.
5★ from real Bark customers
Every review below is verified on our Bark.com profile — read all 40 reviews and check the latest.
Bark verified"Rowan and Junior replaced my old boiler with Vaillant and provided an excellent customer experience from start to finish. They turned up on time, completed the work within 6 hours and left my place clean and tidy. Highly recommend."
Bark verified"Amazing service from start to finish! Had a new boiler installed within a week by engineers who were very knowledgeable and tidy. The 0% finance package was great value. 5 STARS DEFINITELY!"
Bark verified"Clear communications, reliable and quality work for a new boiler and central heating system in Clapham Common from Rowan and the team at 5 Star."
Bark verified"Rowan and his team are amazing. They provided a competitive quote, professional service and also a patient introduction to my newly installed boiler and radiators."
Bark verified"From my initial communication Rowan was polite, friendly, professional and very knowledgeable. My new combi boiler was installed in just one day. Highly recommend — very impressed with the efficiency and quality of service."
Bark verified"Rowan and his team were excellent. He installed a brand new central heating system and boiler into my property. Worked quickly on one of the hottest days of the year and did a brilliant job."
Bark verified"Rowan and the team were a pleasure to work with. They managed to fit us in last minute when my boiler packed up — competitive prices and a beautiful installation. Even the aftercare is impressive."
Bark verified"Rowan came and installed a new boiler for us. He was very punctual, professional, knowledgeable and overall a nice guy. I will happily recommend Rowan for any of your boiler needs."
Quick answers, straight up
Most combi boiler installations range from £1,895 to £3,500 fully fitted, depending on the brand, model and pipework changes required. We provide a fixed written quote after a free in-home survey — no surprises.
We aim to attend same-day for repairs booked before midday and within 24 hours otherwise. Many faults are fixed on the first visit thanks to vans stocked with common parts.
We're approved installers for Worcester Bosch, Vaillant, Ideal, Baxi, Glow-worm and Viessmann. We'll recommend the best fit for your home, budget and warranty needs.
A like-for-like combi swap typically takes one day. A boiler move, system upgrade or conversion may take 2–3 days. We confirm timings before booking.
Up to 10 years on the boiler itself (depending on model) plus our 12-month workmanship guarantee on the installation.
Yes — we provide landlord gas safety certificates (CP12), maintenance contracts and commercial boiler installations for offices, shops and small commercial premises.
Boiler sorted today. Call your local team.
Whether it's an emergency repair or a brand new install — speak to a Gas Safe engineer right now.