New boiler cost calculator
Replacing a boiler is one of the bigger jobs in the home, and the price swings a lot depending on the boiler type, the size of your house and how much pipework has to change. Set the options below for a realistic UK ballpark, supplied and fitted, before you ring round for quotes.
Estimate your new boiler cost
Combis have no separate hot water cylinder, so they are usually the cheapest to fit.
Bigger homes usually need a higher-output boiler.
More bathrooms means more hot water demand and a bigger boiler.
A like-for-like swap in the same spot is the cheapest and quickest job.
A supply-and-fit ballpark for the UK, not a fixed quote. Get a survey from a Gas Safe installer for an exact price.
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What goes into the price
A new boiler quote is really two things added together: the boiler itself and the labour to fit it. A straight like-for-like combi swap is the cheapest and quickest job. The price climbs when the new boiler is bigger, when you move to a system or regular boiler with a cylinder, or when the installer has to move the boiler, run new pipework or add extras like a filter and a power flush.
Choose your boiler type, set the number of bedrooms and bathrooms, and say whether it is a like-for-like swap or a new system or relocation.
See a low-to-high cost estimate and a typical mid-point, so you know the ballpark to budget for and what a fair quote looks like.
Use your range to brief two or three Gas Safe installers and ask each to survey the job and quote in writing.
Save a one-page PDF of your estimate and options to keep or share when you compare quotes.
Estimate = base boiler and fit + boiler type + size adjustments + job type Why two quotes for the same boiler look so different
The job is rarely the same twice
Two houses with the same boiler can be hundreds of pounds apart. A loft swap with easy access is cheap labour, an awkward kitchen relocation with new pipework and a power flush is not. The boiler brand and warranty, your home size, and how much has to change all move the number, which is why a range is more honest than a single figure.
The job goes to the installer who answers
Most homeowners ring three or four installers and book the first good one who actually picks up. The ones who miss the call lose the job to whoever answered. Hey Jodie answers every call 24/7 for heating and plumbing firms, takes the details and books the survey - so quotes do not slip away while the engineer is under a floor. It books jobs and captures enquiries; it does not give out prices.
Frequently asked questions
How much does a new boiler cost in the UK? +
For most homes a new boiler supplied and fitted lands somewhere between about 1,800 and 4,000 pounds. A straight like-for-like combi swap is at the lower end, while a bigger system or regular boiler, a relocation or extra work like a power flush pushes it higher. Set the options above for a ballpark closer to your own house.
What affects the price of a new boiler? +
The main drivers are the boiler type (combi, system or regular), the size and output you need for the number of bedrooms and bathrooms, the brand and warranty length, and how much the installer has to change. A like-for-like swap in the same spot is cheapest; moving the boiler, running new pipework, fitting a filter or doing a power flush all add to both parts and labour.
How much more is a system or regular boiler than a combi? +
Combi boilers are usually the cheapest to buy and fit because there is no separate hot water cylinder. A system boiler typically adds a few hundred pounds, and a regular (heat-only) boiler is similar, before you count the cylinder and any extra pipework. Bigger homes with two or more bathrooms often need a system boiler to keep the hot water flowing.
Is this boiler cost estimate accurate? +
It is a realistic UK ballpark based on typical 2026 supply-and-fit prices, meant for budgeting and for sense-checking the quotes you get. It is not a fixed quote. Your real price depends on your exact boiler, your home and the condition of your existing system, so treat the range as a guide and get a survey before you commit.
How do I get an exact quote for a new boiler? +
Use the range here to set your budget, then ask two or three Gas Safe registered installers to survey the job and quote in writing. A proper quote should list the boiler make and model, the warranty, the labour, and any extras like a filter, flush or new pipework. Compare like for like rather than just picking the lowest headline number.
Does the estimate include removing the old boiler? +
Yes - the base figure assumes a standard installation that includes taking out and disposing of your old boiler and fitting the new one in the same place. Extras that are not always included, such as a power flush, a magnetic filter, a new flue run or moving the boiler, sit on top, which is why the higher end of the range exists.
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