A new boiler can last between 10 and 15 years, but older boilers are less efficient and can be more expensive to run. With the prices of everything going up, replacing an important asset like a boiler can seem stressful.
That’s why we’re here to break down the cost for you so you can plan for the investment, because replacing your old boiler is beneficial for both your comfort and the value of your property.
So, let’s get into it.
Key takeaways
- A new boiler in the UK can cost anywhere from £500 to £15,000, depending on the type of boiler, the size of your property, and the complexity of the installation.
- At My Heating Engineer, new boiler installations start from £1,499, making it easier for homeowners to plan their boiler replacement around their budget.
- A like-for-like boiler replacement is usually the most affordable option because the new boiler is installed in the same place as the old one.
- The boiler brand, warranty length, property size, water pressure, flue position, existing pipework, heating controls, radiators, and the condition of your central heating system all determine the cost.
- Extra costs can include system cleaning, power flushing, magnetic filters, smart heating controls, new radiator valves, gas pipework upgrades, flue changes, or hot water cylinder work.
- A boiler cover can be useful if you want extra peace of mind, annual servicing, callouts, and repair support included in a monthly plan.
How much does a new boiler cost?
A new boiler can cost anything from a relatively straightforward like-for-like replacement to a more expensive full system upgrade.
Unfortunately, there isn’t a single set price, as it depends on the boiler type, where it’s being fitted, any new pipework and controls, the radiators in your property, and how much labour is involved in installing it.
If you’re switching to a completely new type of boiler than your old one, you’re going to pay more than if you stick with the same type but upgrade it to a newer version.
New boiler costs at a glance
As a general guideline, you’re likely to pay anywhere between £1,500 and £15,000 for a new boiler, depending entirely on the complexity of the installation and whether you’re replacing your old boiler like-for-like or changing to a different system.
At My Heating Engineer, our boilers start from just £1,499, with a range of affordable services and extras for those who are on a budget.
Here’s a list of the prices you can expect to pay for different types of boiler installations as of 2026.
| Type of boiler installation | Typical cost | Best for |
| Combi boiler unit | Around £500–£2,000 | Suited to flats, smaller homes and properties with one bathroom. |
| System boiler unit | Around £500–£2,500 | Better for homes with higher hot-water demand, especially where a hot-water cylinder is already in place. |
| Conventional boiler unit | Around £600–£2,500 | These are often found in older homes with a cylinder and tanks. |
| LPG boiler | Around £600–£2,500 | Usually used in off-grid homes that aren’t connected to mains gas. |
| Biomass boiler | Around £10,000–£15,000 | Usually a much larger investment than standard gas, oil, or LPG boilers |
For supply-only boilers, you’re looking to pay around £500–£3,500 for many standard boiler types, which covers the cost of the boiler unit itself, before labour, materials, flue, controls, or extras are added.
What goes into the cost of a new boiler?
When you’re having a new boiler installed, a lot can go into the final quote, including the following:
- Boiler brand
- Warranty length
- Property size
- Water pressure
- Existing pipework
- Flue position
- Heating controls and radiators
- The condition of the current central heating system
The most affordable option for many homeowners is usually a like-for-like boiler replacement, where the new boiler is fitted in the same location as the old one.
Of course, this isn’t always possible, such as if you’re adding bathrooms, extending your property, or upgrading an older heating system, so it’s best to go with what’s more suitable and valuable in the long run.
How much does it cost to have a new boiler installed?
Once you’ve paid for the boiler itself and any add-ons, the most you’re likely to pay is £15,000. However, that’s if you install the best-of-the-best boiler with a range of modern controls.
You could end up only having to fork out £3,000 for the whole process; it just depends on all the factors we’ve mentioned above. A simple combi boiler swap is very different from installing a biomass boiler, relocating a boiler, converting from a conventional system, or fitting a full new central heating system.
Since the existing pipework, flue route, and heating setup can often be reused or adapted more easily for a like-for-like boiler replacement, these generally end up being the more affordable option.
A professional heating engineer will be able to take a look at your old boiler and provide you with the best option and a quote. At My Heating Engineer, we offer a free quote and site survey from our Gas Safe engineers for new boiler installations.
Are there any hidden costs when replacing a boiler?
There are some extra costs that homeowners may not always expect.
While these aren’t necessarily hidden, many people may not be aware of all the factors that go into the cost of boiler installation. Some of the most common ones include:
- System cleaning: If your radiators or pipework contain sludge, rust or debris, our engineer may recommend a system flush or power flush before the new boiler is fitted.
- Additional heating controls: A new boiler may require modern controls to operate efficiently. This could include a room thermostat, programmer, thermostatic radiator valves, or a smart thermostat.
- Magnetic filters: These are fitted to the heating system to capture small metal particles and sludge before they reach the boiler, helping the boiler run longer.
- Flue and condensate changes: If the new boiler requires a different flue route, or if the existing flue no longer meets current requirements, additional parts and labour may be required.
Some other extra costs may come from needing to:
- Replace damaged or unsuitable radiators
- Add or replace thermostatic radiator valves
- Upgrade old or undersized gas pipework
- Remove old tanks or cylinders during a system conversion
- Fit a new hot water cylinder
- Annual servicing to maintain the manufacturer’s warranty
While modern condensing boilers are more expensive, they’re much more efficient than older boilers because they capture and reuse more heat from gases that would otherwise escape.
Should I get boiler cover?
If you’re someone who likes extra peace of mind when investing in a large home upgrade, then boiler cover is a great option to consider.
Boiler cover is a care plan or insurance-style policy that helps protect you if your boiler breaks down. Depending on the level of cover you choose, you may benefit from an annual boiler service, callouts, labour, parts, controls, central heating repairs, plumbing, or electrics.
That means instead of paying for issues as and when they arise, you spread the cost of servicing, repairs, and emergency callouts, so you’re covered for the future.
We offer boiler and system care plans at My Heating Engineer, with a new boiler protection plan from £8.99 and a complete care plan from £24.
What should be included in a new boiler quote?
When getting a quote for a new boiler, it should include a clear breakdown of the work being carried out, the boiler being installed, and any additional parts or services included in the price.
At a minimum, the quote should include the boiler’s make and model, as prices can vary by brand, output, warranty length, and features, so you should know exactly what boiler is being installed and why.
The quote should also include a detailed breakdown of the installation costs, covering labour, standard materials, removal of the old boiler, and fitting of the new one.
If you have an older home or a large property, the quote should also explain whether any survey is required before the final price is confirmed. Contact us today for your free quote!
Upgrade your boiler today
If your old boiler is unreliable or no longer keeping up with your home’s heating and hot water needs, now could be the right time to upgrade.
Doing so now will mean you can enjoy more comfortable days at home, saving money while benefiting from advanced control settings and better energy efficiency.
Get in touch today to understand how we can help you. Our experienced Gas Safe registered engineers will assess your current setup, explain your options clearly. and recommend a boiler that suits your home.