Boiler Installation and Replacement in Brighton & Hove

High-efficiency boiler upgrades and safe removals — combi, system, and conventional options fitted by trusted Gas Safe engineers

Get a Free Boiler Estimate

What’s Included in Our Boiler Installation Services

Full Boiler Replacement

Safe removal of old or faulty boilers and professional installation of new high-efficiency systems — combi, conventional, or system units.

Gas Safe Certified Install

Every installation is handled by Gas Safe–registered engineers with full compliance and safety certification provided on completion.

System Upgrades

We convert old systems to combi or sealed setups and optimise heating performance for modern living and better energy efficiency.

Pipework Adjustments

Adaptation or replacement of heating pipework to suit your new boiler — including clean, neat rerouting where needed.

Radiator & Control Integration

Connection to your existing system or new radiators, thermostatic valves, and smart controls — all tested and commissioned.

Waste Removal & Handover

Old unit responsibly disposed of and new system explained, with handover of manuals and maintenance guidance.

Our Gas Combi Boiler Range

Ideal Boiler Replacement

Ideal

24kW – £2500+VAT
27kW–30kW – £2800+VAT
Vaillant Boiler Replacement

Vaillant

24kW – £3200+VAT
27kW–30kW – £3900+VAT
Worcester Boiler Replacement

Worcester

24kW – £2900+VAT
27kW–30kW – £3400+VAT
All prices include boiler swap in the same location and disposal of your old boiler.
Prices may vary due to the current economic climate.
Every gas combi boiler installation comes with a filter fitted for a 10 year guarantee.
Rainbow Building Plumbing & Electrical Services place picture
Rainbow Building Plumbing & Electrical Services
5.0
Based on 34 reviews
review us on
Peter W. profile picture
Peter W.
1 month ago
Large External Painting and Decoration & Maintenance Competitive price, with fast and efficient work. Have used them for many years and will use again.
Justin M. profile picture
Justin M.
2 months ago
We engaged Rainbow to renovate our shower room. Very, very easy to work with - helpful with advice and support about what we needed to get done. Mark and Max were great - you couldn't ask for friendlier people. We had some teething issues (NOT the fault of Rainbow) which Rainbow helped to rectify and get the job complete. Recommended and we'd certainly use their services again.
Tina W. profile picture
Tina W.
7 months ago
The contractors were extremely professional and prompt. They explained everything they were doing throughout the process and I am extremely pleased with the quality of the work
Clara G. profile picture
Clara G.
8 months ago
We went to Rainbow building to get some work done in our kitchen before we could get a new kitchen fitted in. They did wonderful work and let us know of any issues or complication we would face. Mark and Max especially were really nice and we're really happy with the partial wall removal, tile removing and replastering work they did for us!
Louise P. profile picture
Louise P.
9 months ago
Great communication, friendly team. Flexible when I had delivery delays.
Dan G. profile picture
Dan G.
10 months ago
The Rainbow team first did some excellent work for us 10 years ago. And they have just finished some renovations in the last week, which has gone really smoothly. Kev is a great communicator, always able to offer his expert opinion on the work required and then gets the job done. The best in Brighton.
Graeme C. profile picture
Graeme C.
10 months ago
Needed a complete flat refurbishment to include new Kitchen, Bathroom, Flooring, Electrics, Plumbing and Decorating etc. Wanted a local contractor to take control of the whole project rather than trying to juggle lots of different Trades myself. Rainbow (Mark in particular) were able to manage the whole project from start to finish and totally transformed the place, as shown in the photos. I was particularly impressed with the Kitchen so a special shout out to Stephen
Johanna D. profile picture
Johanna D.
11 months ago
We had a great experience with Kev, Mark and their team. Our bathroom was gutted and then totally refitted, and the result looks brilliant! They were really communicative throughout the process, offered recommendations, and worked hard to resolve issues which popped up. Would definitely recommend. Thanks so much!
Daryn C. profile picture
Daryn C.
12 months ago
We’re absolutely delighted with our new bathroom. Kevin, Mark and the team transformed an old, tired space into a clean, modern and relaxing room that’s a real joy to use. There were a few unexpected challenges along the way, but everything was clearly explained and managed, so there were no nasty surprises with the budget. They were also very considerate of our circumstances at home, which made the whole process much easier. Professional, tidy, and great communication throughout – highly recommended!
Manda S. profile picture
Manda S.
1 year ago
Steel Beam Works / Plastering / External Render / Carpentry / Window Fitting We have used Rainbow several times over the years and always had excellent workmanship. This was our biggest work and we were a bit nervous but Mark and the boys were extremely capable, curteous and considerate. We were living on site and they did their best to mitigate dust affecting our living area. We also didn't have to endure a radio playing the same music again and again! They were also very reliable. Now they have gone, we actually miss them!
Rowan B. profile picture
Rowan B.
1 year ago
Another fantastic job completed at the property, this time a new kitchen fit. Mark, Kev and the wider team were fantastic every step of the way - very responsive and amazing attention to detail. Would highly recommend their services.
Stephen F. profile picture
Stephen F.
2 years ago
Good
emma L. profile picture
emma L.
2 years ago
Friendly, reliable and willing to take on smaller jobs as well as larger ones. The work was of a high standard and communication was clear and simple. I wouldn’t hesitate to happily recommend Rainbow and will certainly use them again in the future.
Tilly U. profile picture
Tilly U.
2 years ago
From the very first on-site meeting with Kevin Viney at Rainbow Building Plumbing & Electrical Services we were confident in the advice given, and suggestions made. Major building renovations are a daunting task, so with Rainbow we felt we would be in safe hands if we engaged them. And we weren’t disappointed. Throughout the project those things that were most important to us were achieved, many requiring precision down to the millimetre. And when unforeseen issues arose, as they do in older buildings, whilst these caused us some sleepless nights, Rainbow confidently dealt with them enabling us to return to calm and carry on. Mark Burns, the builder and project manager, has been amazing with his wide knowledge, craftsmanship, and meticulous attention to detail - and his calm manner under pressure, has resulted in every aspect of the work carried out by Rainbow to be of a high standard and the best it could be. Thank you Rainbow - and if ever we are crazy enough to embark on another renovation project we would definitely be calling you to see it through.
John L. profile picture
John L.
2 years ago
Rainbow have carried out a complete refurbishment of my flat to an impeccable standard. They also landscaped the garden. Both look unrecognisable and I wouldn't hesitate to recommend Kev, Mark, Steve and the others at Rainbow.
Photo from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer reviewPhoto from customer review
Danny M. profile picture
Danny M.
2 years ago
Hi there - we have just had our kitchen fitted by Rainbow, and I would heartily recommend them to anyone else in Brighton. They were super organised, friendly and easy to communicate with, got the job done quickly AND it looks really good! Definitely good value for money as well! Cheers Danny
Teresa L. profile picture
Teresa L.
2 years ago
A trustworthy and responsive Building Company? Yes, it is rare but Rainbow fits the bill. Kev and his staff/contractors know their stuff. Kev was always responsive and reliable when contacted - a big plus in my book - and his workers left the place as clean and tidy as possible after a major structural work. Definitely recommend
andy B. profile picture
andy B.
2 years ago
I have nothing to say bad about these guys - Kev and his team are awesome they did an amazing job of knocking through out kitchen and dining room - putting in new steels and installing a new kitchen - Mark was project manager and i have not met a nicer guy who talked us through every step of the way Gary the plumber was amazing - Steve the Carpenter was utterly brilliant - and Danny the tiler super quick and awesome :) would def recommend to anyone - plus getting them back to do our new bedroom and ensuite later this year :)
Claude L. profile picture
Claude L.
3 years ago
Went above and beyond will always use again
Aliénor D. profile picture
Aliénor D.
3 years ago
My go to guy as of now . Boiler swapped in one day for cheap

Need a New Boiler?

Whether you're upgrading an old system or replacing a broken unit, we fit combi, conventional, and system boilers safely and efficiently. Let’s get you warm again.

Get a Free Boiler Estimate

Why Clients Trust Rainbow for Boiler Installation

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Gas Safe Registered

Our engineers are fully certified and follow UK gas safety regulations for every boiler installation and replacement.

📋

Clear, Fixed Pricing

We provide detailed estimates with no hidden extras — know exactly what you're paying for, before work begins.

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Trusted in Brighton & Hove

We’ve helped hundreds of local homeowners upgrade their heating with reliable, long-lasting boiler installs.

When You Might Need This

Your current boiler is no longer working or beyond repair
You’re switching from a conventional system to a combi boiler
You want better energy efficiency and lower heating bills
You’re renovating and need an upgraded heating setup
You’ve moved into a new home and want a modern boiler
You need a certified Gas Safe engineer to handle the job properly

How We Work

1

Request Your Estimate

Hit “Get a Free Estimate” to tell us about your boiler needs and book your site visit with our Gas Safe team.

2

We Visit Your Property

We assess your current system, discuss your heating needs, and recommend the right boiler type for your home.

3

Receive a Detailed Estimate

You’ll get a full written quote detailing boiler options, installation steps, and fixed pricing — no surprises.

4

Boiler Installation Begins

We install your new boiler to spec — safely, tidily, and efficiently — with system testing and certification included.

Time for a Boiler Upgrade?

Replacing an inefficient or broken boiler can save you money and stress. We offer expert advice and full installation with no pressure. Let’s get started today.

Request My Boiler Estimate

Verified by trusted organisations and committed to quality, safety, and inclusion across Brighton & Hove.

Working alongside the LGBTQ+ community in Brighton & Hove and surrounding areas.

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Useful Links for Boiler Installations in Brighton & Hove

Boiler Installation FAQs

Are you Gas Safe registered?

Yes, all boiler installations are handled by Gas Safe–registered engineers with certification issued on completion.

Can you replace combi, system, and conventional boilers?

Yes, we install and replace all common domestic boiler types — including combi conversions and sealed system upgrades.

Do you dispose of the old boiler?

Absolutely. We remove and dispose of your old boiler responsibly as part of our full installation service.

How long does boiler replacement take?

Most boiler swaps are completed in 1–2 days. We'll confirm timings during your estimate visit.

What’s the first step?

Request a free estimate and we’ll arrange a visit to review your heating system and recommend your best options.