A new boiler in West London typically costs somewhere between roughly £1,800 and £4,500 fully installed in 2026, with a straightforward like-for-like combi swap at the lower end and larger or more complex jobs higher up. These are general UK market figures to help you budget, not a quote. London usually sits toward the upper end of that range, mostly because labour costs more here than in much of the country. The figure for your own home comes down to the type of boiler you choose and how much work the installation involves — which is why the only number truly worth trusting is one based on your actual property. We give a free home survey and a fixed written quote, so the price you’re told is the price you pay, with no surprises on the day. You can see our current pricing and book a free quote on our boiler installation page. We’re Gas Safe registered (657972) and cover West and North West London.
If you’re weighing up a new boiler, you’ve probably noticed the same thing we hear from homeowners across Ealing, Chiswick and Kilburn every week: every guide gives a different number, and none of them feel like they’re talking about your home. This page gives you honest market ranges to budget with, then explains exactly what shapes the final figure — so when you do get a quote, you’ll understand precisely what you’re paying for.
Key takeaways
- A new boiler in the UK typically costs £1,800–£4,500 fully installed in 2026; London usually sits toward the upper end.
- A like-for-like combi swap is the most affordable route; conversions and larger systems cost more.
- The biggest cost drivers are boiler type, the condition of your flue and pipework, and labour.
- The only accurate figure is a survey-based fixed written quote — book yours free.
What does a new boiler cost in 2026? (typical UK figures)
Across the UK, a new boiler typically costs between £1,800 and £4,500 fully installed in 2026, according to Checkatrade’s 2026 cost guide and other UK industry data. A simple like-for-like combi swap sits at the lower end, while system boilers, conversions and larger homes push toward the top. The UK average lands at roughly £2,400 for a mid-range boiler fitted in a day.
In London, expect to sit toward the upper end of that national range. A new combi commonly runs around £2,800 to £4,500 in the capital, with industry figures putting London roughly 15–37% above the UK average — almost entirely down to higher labour costs.
A note on these figures: these are typical UK market ranges to help you budget, not a quote. Your actual price depends on your home, your boiler choice and the work involved — we confirm it free in a survey and a fixed written quote.
What goes into the cost of a new boiler?
What goes into the cost of a new boiler is mostly five things: the boiler type, whether it’s a like-for-like swap or a full conversion, the condition of your existing flue and pipework, any gas-supply upgrade, and the controls you add. The unit itself is only part of it — the price of a new boiler is really the price of a job, not a product, and two homes on the same street can pay quite differently for the same model because of what’s behind the wall. Here’s what moves the figure most.
The type of boiler
A combi boiler — which heats water on demand with no separate tank — is the most popular choice in West London flats and smaller homes, and usually the most cost-effective to fit. System and heat-only boilers, which work with a hot water cylinder, tend to suit larger homes with more than one bathroom. The boiler itself is only part of the cost, but the type sets the shape of the whole installation. We fit A-rated boilers from trusted manufacturers including Worcester Bosch, Vaillant, Baxi and Ideal, and we’ll recommend the right model for your home and budget.
Like-for-like versus a conversion
Replacing your existing boiler with the same type, in the same place, is the simplest and most affordable swap. Converting from one type to another — say, an old system boiler to a combi — means removing the tank, re-running pipework and reconfiguring the system, which adds time and materials.
Your flue, pipework and gas supply
Older West London homes often hide surprises behind the boiler. An ageing flue, narrow gas pipe, or corroded pipework may need upgrading to meet current standards and run a modern, efficient boiler safely. These aren’t upsells — they’re the difference between a boiler that limps along and one that works properly for years.
Controls and extras
A smart thermostat, new radiators, a system flush or a magnetic filter to protect your new boiler all add to the job, but each one earns its place by improving efficiency or extending the life of the system. We’ll always explain what’s genuinely worth doing and what isn’t — honest advice with no upselling is the whole point.
Why does a London boiler cost more than the UK average?
London tends to sit toward the top of the national range, and there are sound reasons for it. Skilled gas engineer labour simply costs more in the capital — industry figures put London roughly 15–37% above the UK average. On top of that, West London’s housing stock — Victorian terraces, converted flats, mansion blocks in Maida Vale — often makes for trickier jobs: awkward flue runs, tight access, and parking or permit restrictions that add time on the day.
None of this is a reason to expect a nasty surprise. It’s a reason to get a price based on your actual home rather than a national “average” that was never about your property in the first place. When we quote, every one of those factors is already accounted for — and the figure we give you is fixed.
Combi, system or heat-only — which is right for your home?
A combi boiler suits most one-bathroom West London homes and flats — it’s compact, efficient, and needs no separate hot water tank. A system or heat-only boiler suits larger homes running more than one bathroom, where a stored cylinder means two showers can run at once. The right choice depends on how your home uses hot water, not on price alone — and choosing well matters more for your long-term cost and comfort than chasing the cheapest unit.
Getting this decision right is where a good engineer earns their keep. We’ll look at how your home actually uses hot water and recommend the type that fits — not the one that’s easiest to sell. If you’re not sure, our boiler installation team will talk it through honestly during your free survey.
How to get an accurate price for your home
To get an accurate price for your home, book a free home survey: an engineer sees the boiler, flue and pipework in person, then gives you a fixed written quote. Market ranges are great for budgeting, but the only reliable figure is one based on your actual property — which is why we come to you, look at the job properly, and give one clear, fixed price with no obligation and no chasing round for quotes.
That quote is the price you pay. Everything needed to complete the work is in it, agreed before we lift a tool, so there are no extras invented halfway through the day. To see our current pricing and book your free survey, head to our boiler installation page or call us — our line is answered 24/7 and we’ll get your details to an engineer.
What’s included when we fit your boiler
When you choose The Happy Heating Co, the quote covers a complete, tidy installation from start to finish: supply, fitting, testing and commissioning, and we register your manufacturer’s warranty for you so you don’t have to think about it. Our engineers are Gas Safe registered (657972), fully insured, and respectful of your home — dust sheets down, mess cleared, everything left as we found it.
You also get the things that matter long after the boiler’s running: a proper handover so you know how to use it, a digital record of the work, and a team you can actually reach if you ever need us. It’s the same standard on every job, whether you’re a homeowner in Queen’s Park or a landlord in Willesden.
Once your new boiler is in, keeping it healthy is simple — an annual boiler service protects your warranty and efficiency, and if anything ever goes wrong, our boiler repairs team is a phone call away. We also handle wider central heating services across the area.
Frequently asked questions
How much does a new boiler cost in West London?
Across the UK a new boiler typically costs around £1,800–£4,500 installed in 2026, and London usually sits toward the upper end because labour costs more. These are general market figures for budgeting, not a quote — your price depends on your home, so we give a free survey and a fixed written quote.
What makes one boiler quote more expensive than another?
Mainly the boiler type, whether it’s a straightforward like-for-like swap or a full conversion, and the condition of your existing flue and pipework. Moving the boiler to a new location, upgrading the gas supply, or adding smart controls all add to the work involved.
Why is a new boiler more expensive in London?
London tends to run above the national average, largely because labour costs more here — industry figures put it roughly 15–37% higher. Older West London housing, trickier access and parking restrictions can also add time to a job. Our promise stays the same: one fixed written price, agreed before we start.
What’s included when you fit a new boiler?
Everything needed for a complete, tidy installation: the boiler, the fitting, testing and commissioning, and we register your warranty for you. Our engineers are Gas Safe registered (657972) and fully insured, and we leave your home as clean as we found it.
How long does a new boiler installation take?
A straightforward like-for-like combi swap is usually done in a day. Converting from a system or heat-only boiler, or moving the boiler to a new location, can take two to three days because there’s more pipework and testing involved. We’ll tell you exactly when we quote.
Do you charge for a quote or survey?
No. We give a free, no-obligation home survey and a fixed written quote. Seeing your home in person is the only way to price the job accurately, so there’s no guesswork and no surprise costs added on the day.
Are you Gas Safe registered?
Yes. The Happy Heating Co is Gas Safe registered (657972), which is a legal requirement for anyone working on gas boilers in the UK. Every installation we carry out is done by a qualified, fully insured domestic gas engineer and signed off properly.
Get your fixed quote for a new boiler in West London
Ready to find out what a new boiler will actually cost for your home? It takes 60 seconds to get started.
- WhatsApp us — Book in 60 seconds
- Call 020 8051 2124 — our line is answered 24/7 and we’ll get your details to an engineer
- See current pricing and book a free survey: boiler installation
We’re Gas Safe registered (657972) and proud to keep homes warm across West and North West London — from Acton and Chiswick to Kilburn, Maida Vale and beyond. Heating that just works, no drama.
About the author
Adam Said is a Gas Safe registered domestic gas engineer (657972) at The Happy Heating Co, installing, servicing and repairing boilers in homes across West and North West London. This guide reflects what we see on real jobs every week.
Related reading
- Boiler installation in West London
- Annual boiler servicing
- Boiler repairs
- Central heating services
- Areas we cover
Market figures in this guide are typical UK 2026 ranges for budgeting, drawn from current industry cost data (Checkatrade, MyJobQuote) — not a quote. Verify current figures before relying on them.
