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Islington runs from Victorian terraces in Highbury to converted flats around Clerkenwell and Angel, and BeFix fits boilers across all of it. A new installation costs £1,500 to £3,750 (+VAT), carried out by our own Gas Safe registered engineers (No. 967796), as part of our wider Boiler Installation in London service. Boiler finance is available if you’d rather spread the cost.
Flats and smaller homes with no separate hot water cylinder.
Homes with an airing cupboard cylinder and more than one bathroom.
Larger period homes with an existing traditional heating system.
These figures cover supply, installation and Gas Safe certification, but the final price depends on the boiler you choose, whether any pipework needs altering, and how accessible the property is. A fourth-floor Clerkenwell conversion with a tight stairwell simply takes longer to work in than a ground-floor Highbury terrace. We don’t quote a single fixed price for every Islington job, because a straightforward combi swap and a full system relocation aren’t the same piece of work. Instead, we assess your property first and give you a written, itemised quote before anything begins, so you know exactly what you’re paying for and why. If you’d rather spread the cost, boiler finance is available, subject to approval.


Islington’s housing stock is genuinely mixed, and that changes which boiler actually suits a property. Homes around Clerkenwell and Angel tend to be converted flats or old warehouse spaces, usually with tight plant space and only one or two people needing hot water at once. A compact combi boiler, mounted in a kitchen cupboard, usually covers this without needing a separate hot water cylinder. Further north around Highbury and Canonbury, larger Victorian and Georgian family homes with multiple bathrooms put a heavier, more simultaneous demand on hot water, which a combi alone can struggle to keep up with. Here, a system or regular boiler paired with a cylinder holds a reserve of hot water, so two showers running at once don’t leave anyone with a trickle. We size and specify the installation around your property and household, not the other way around.
| Property type | Typical hot water demand | Recommended boiler |
|---|---|---|
| Flat or conversion (Clerkenwell, Angel) | 1–2 occupants, one bathroom | Combi |
| Terrace or period home, single bathroom | Moderate, staggered use | Combi or system |
| Family home, 2+ bathrooms (Highbury, Canonbury) | High, simultaneous demand | System or regular with cylinder |
An engineer visits to check access, existing pipework and the best position for the new boiler.
A clear price breakdown before any work is booked in no vague "from" figure.
Most straightforward swaps take around 8 hours and are completed within a single working day; more complex jobs may need longer.
All work carried out under registration number 967796.
Every new boiler is commissioned, tested and registered a gas safety certificate is available if you need one.
12 months' workmanship cover from Befix, plus up to 12 years' manufacturer warranty depending on the model.
We install and service boilers from Worcester Bosch, Vaillant, Ideal, Keston, Remeha, Baxi, Main and Viessmann, so you’re not limited to whichever brand happens to be easiest for us to source. We’re an accredited installer for Worcester Bosch, Baxi, Vaillant and Ideal specifically, which means we can offer their extended manufacturer warranties and fit genuine parts backed by the manufacturer. During your free assessment, we’ll recommend a brand and model based on your property, budget and hot water demand, not a one-size-fits-all default.

Number 967796, verifiable on the official Gas Safe Register at any time.
for the duration of every job.
per engineer, including older, awkward-access properties common in Islington.
BeFix is Gas Safe registered under number 967796. You can check this directly on the Gas Safe Register website before booking. We also hold public liability insurance, and our engineers have more than 10 years of hands-on experience installing and servicing boilers in London homes.




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Kate HendersonTrustindex verifies that the original source of the review is Google.
I’d had various concerns about my aircon system at my flat in NW2 not working effectively, and was very relieved when Befix were able to offer a prompt service appointment. Communication in advance of the appointment was good and engineer Vahid arrived punctually and worked carefully and thoroughly, ensuring the whole system was in good working order. He was clearly knowledgeable about all kinds of technical issues, friendly and adaptable, and I had confidence that he was attending to everything properly. I am not perhaps very familiar or up to date with what I should expect to pay for this kind of work. I think the price was probably fair - but I would advise checking in advance to make sure you are happy with the arrangement. I was left feeling relieved my system was now in good working order, and will certainly consider the company again for future work, including more ambitious projects.Posted on Google![]()
Beryl RamsayTrustindex verifies that the original source of the review is Google.
Excellent job, very thorough and pleased with the end result.Posted on Google![]()
Kornwipha SutthiphonphongTrustindex verifies that the original source of the review is Google.
Great job on fixing the boiler. Fast and efficient quick call out for Slone square area 👏Posted on Google![]()
Asim Cengiz AkbulutTrustindex verifies that the original source of the review is Google.
Needed certified gas safety experience in Finchley Central, N3. Came out on emergency call and did a great job. V happy, will call againPosted on Google![]()
oja cTrustindex verifies that the original source of the review is Google.
Vahid was kind, professional, and incredibly good at his job. He came quickly and flexibly to west london/ Kensington area— and worked out the most economic and quickest way to help with a boiler that lost its pressure. Could not recommend this service more!Posted on Google![]()
Sev ZachariaTrustindex verifies that the original source of the review is Google.
Brilliant service very fast Aircon unit installed.Very reasonably pricedPosted on Google![]()
NICHOLAS PEARSONTrustindex verifies that the original source of the review is Google.
Excellent in every respect. If you need a top plumber in South East London then BeFix come highly recommended. A tricky job which had not been solved by previous professional, was immediately diagnosed by BeFix which has saved me money and time. Efficient, punctual, and reasonably priced.Posted on Google![]()
Anthony PisarskiTrustindex verifies that the original source of the review is Google.
Amazing quality of work. Was lucky enough to have a same day appointment. Provided great advice, arrived on time and completed the work exactly as promised. Very reasonably priced (having received a quote for over 2x) Would absolutely recommend every time. Very friendly and professional! Thank you so muchPosted on Google![]()
Samin MoghimiAslTrustindex verifies that the original source of the review is Google.
Vahid was very fast to respond to my quote request and to set a time for his visit. He fixed our boiler in a very efficient and professional manner. He already had the replacement part with him beforehand which was very helpful. I would 100% recommend BeFix!Posted on Google![]()
TaysirTrustindex verifies that the original source of the review is Google.
Took some trial and error and a few visits, but in the end it was done. He visited on short notice which was very helpful.
From £1,500, rising to around £3,750 for larger system or regular installations. The exact figure depends on the boiler type and how much work your property needs, confirmed in a written quote after a free visit.
A like-for-like swap usually takes about 8 hours, finished in one day. Relocations or pipework changes can add a day or two. We'll confirm the timeline during your free visit, not on the day itself.
Generally a combi for a Clerkenwell flat, and a system or regular boiler with a cylinder for a multi-bathroom Highbury home. Our engineer confirms the right fit for your specific property during the site visit.
Yes, registration number 967796, checkable any time on the Gas Safe Register website. Every Islington installation is carried out under that registration.
Yes, subject to approval. Ask about the options when you book your free site visit.
A 12-month Befix workmanship warranty, plus up to 12 years' manufacturer warranty depending on the model you choose.
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