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.
Fast callback. Fixed pricing. No obligation.
Whatever your boiler is doing (or not doing), our Gas Safe engineers will diagnose, quote and usually repair on the same visit.
Cold radiators, lukewarm showers — most causes diagnosed in under an hour.
Constant top-ups usually mean a leak or expansion vessel issue. We find and fix it.
Often a thermocouple, gas valve or flue issue. Safe diagnosis the same day.
Limescale or pump issues. We flush, repair or recommend if needed.
We know every major brand's fault codes inside out — fast, accurate repairs.
Older units cost more to run. We'll be honest if a replacement saves you money.

Fitted right, the first time.
Simple, transparent, and built around your schedule.
We visit (or video-survey), assess your system, and recommend the right boiler for your home and budget.
Transparent price including boiler, parts, labour, removal and certification. No nasty surprises.
Tidy, respectful work by Gas Safe engineers. Most combi swaps done in a single day.
We register your warranty (up to 10 years), demo the controls, and clean up properly.
Indicative starting prices — every job confirmed in writing before any work begins.
First-hour diagnosis & fix
Supplied & fully fitted
Service or landlord cert
Every engineer on every job. Required by law for gas work — we wouldn't have it any other way.
Worcester Bosch, Vaillant, Ideal & more — meaning longer warranties and better support for you.
Same-day repairs in most London postcodes. We turn up when we say we will.
You'll know the price before we start. We'd rather lose a job than spring extras at the end.
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."
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.
Whether it's an emergency repair or a brand new install — speak to a Gas Safe engineer right now.