How Much Does a New Boiler Cost in 2026?
How much does a new boiler cost? The real answer is that there’s no single figure, because no two homes are the same. The price depends on the type of boiler you need, whether it’s a straight swap or a bigger job, and what’s included.
It’s one of the first things people ask us, and it’s a fair question. The trouble is that “it depends” isn’t much use when your boiler has just given up on a cold November morning. So in this guide we’ll break down what really drives the cost, what a good installation should include, and how you can get your own fixed price online in a few minutes, with no surveyor visit needed.
Why there’s no one price for every home
You’ll find plenty of price ranges online, but without knowing your home, your current boiler and your hot water needs, any figure is a guess. A guess isn’t much help when you’re trying to plan and budget.
That’s exactly why we built our online boiler quote tool. Answer a few quick questions and you’ll get a fixed price for your home, not a ballpark figure.
Find out what your new boiler will cost
What affects the cost of a new boiler?
Two homes on the same street can get very different quotes. These are the main reasons why.
The type of boiler you need. Combi boilers heat water on demand and suit most smaller and medium-sized homes. System and conventional boilers work with a hot water cylinder, which suits bigger households with more than one bathroom. The right type depends on your home, not on what’s cheapest.
A straight swap or a conversion. Replacing like-for-like in the same spot is the simplest job. Switching from a regular boiler to a combi means removing tanks and the cylinder and reworking pipework, which takes longer and costs more.
Moving the boiler. Relocating it, say from a kitchen cupboard to the loft or garage, means new pipe runs, a new flue and often a new condensate route.
The flue. A simple horizontal flue through an outside wall is the norm. A vertical flue through the roof, or a plume kit to redirect steam away from a neighbour’s window, adds to the bill.
Boiler size and brand. A bigger output for a larger home costs more, and premium brands with longer warranties cost more upfront but tend to pay you back in reliability.
The state of your system. Older systems can be full of sludge. A system clean, a magnetic filter and sometimes an upgraded gas pipe protect your new boiler and keep the warranty valid.
Controls. A basic programmable thermostat is standard. Smart controls that you run from your phone are a popular upgrade.
Why choose Custom Heat & Cool for your new boiler?
At Custom Heat & Cool, we’ve been fitting boilers since 1980. We’re Gas Safe registered and a Worcester Bosch accredited installer, and we’re rated 5 stars on Trustpilot from more than 4,000 reviews. Once your boiler is in, our Care Plans (from £12.50 a month) keep it serviced and covered for years to come.
Get your new boiler price in minutes
You don’t need to wait in for a surveyor to find out what your new boiler will cost. Our online boiler quote tool gives you a fixed price straight away.
- Answer a few quick questions about your home and your current boiler. You don’t need any technical knowledge.
- See your recommended boilers and your fixed price, with no obligation.
- Book your installation online at a time that suits you.
It’s the same expert advice you’d get from one of our team, just quicker, and you can do it from your sofa at any time of day.
Prefer to talk it through? Call our friendly team on 0330 383 0000.
New boiler cost FAQs
How long does it take to fit a new boiler? A like-for-like combi swap usually takes a day. A conversion or a move to a new location can take two to three days.
Is it cheaper to repair or replace my boiler? If your boiler is over 10 to 15 years old, breaking down often, or parts are hard to get hold of, replacing it is usually better value. A new A-rated boiler can also cut your heating bills. If you’re not sure, one of our engineers can give you an honest view.
Can I get a grant for a new gas boiler? The government’s Boiler Upgrade Scheme only covers low-carbon systems like heat pumps, not gas boilers. Some households on certain benefits may qualify for help through other energy schemes, so it’s worth checking.
Which is cheaper to install, a combi or a system boiler? A combi swap is usually the cheapest job because there’s no hot water cylinder involved. But if you have a big family and two or more bathrooms, a system boiler may suit you better.
What size boiler do I need? It depends on the size of your home, the number of radiators and bathrooms, and how much hot water you use. Our online quote tool works this out for you from a few simple questions.
