Boiler Installation Cost

How Much is a New Boiler Installation?

The average boiler installation cost across the UK is around £2,400. This includes the cost of a new boiler, as well as the boiler fitting cost.

Boiler replacement costs you're quoted will mainly depend on the type of boiler you're installing, whether you're moving the boiler at the same time or need new pipework, and where you're located in the UK.

Excluding supply costs, and in standard cases, you should expect the cost of boiler installation to be around £1,000. However, prices you're quoted for labour could be as low as £600 or as high as £1,700.

Gas combi boiler installation costs typically range between £1,200 and £4,000. This remains the most commonly installed type of boiler in the UK.

Homeowners that get quotes for the fitting of a mid-range gas combi boiler will land in the middle of this range — in the £1,800 to £2,800 bracket. You can replace a gas combi boiler for less than this, but only if it's a simple swap-out for a basic boiler model.

Keep reading for an overview of how much all the different types of boilers cost to install in 2025.

Boiler Installation Prices

The table below provides an overview of typical new boiler installation costs in the UK. This makes it simple and easy to calculate what prices you should expect to be quoted.

Want to get a better picture of what to expect?

Use MyJobQuote to get free, no obligation quotes from heating engineers near you. It's fast, easy, and connects you with local tradespeople.

Note: Installing a new boiler should be handled by a tradesmen who is professionally certified. For gas boilers (combi, system, condensing, conventional), you'll need to check that they're listed on the Gas Safe Register.

What Impacts Boiler Installation Costs?

Boiler installation costs will be determined by:

• The boiler's brand - Premium boiler brands like Viessmann, Vaillant, and Worcester Bosch will typically charge more than mid-range boiler brands like Baxi and Ideal.
• Your home's location - Homes in London or the surrounding areas can cost £250 to £700 more than those living in the north of the UK due to increased demand.
• Replacing boiler like-for-like - Swapping your old combi boiler for a new combi boiler will have significantly lower labour costs than if you were to change fuel type.
• Replacing boiler with a different fuel type - New pipework, fuel lines, upgrading or removing water tanks, electrical and flue work will all bump up your installation costs if you're changing your boiler's fuel type.
• National or local heating engineer - Opting for a local heating engineer will carry lower labour costs than if you were to choose a national installation company as their overheads will be lower, saving you between £500 to £1,500 in labour costs.

As for long-term boiler costs, a typical boiler service costs between £70 and £130, and should be completed once a year.

If you need it, an emergency boiler repair is usually necessary when you are left without heating or hot water or have a gas or water leak in the home. As an estimate, most gas and heating engineers will charge between £40 and £120 per hour for labour.

Additional Boiler Installation Costs

Here are some additional boiler services you may need to think about when having a new boiler installed:

• Radiator replacement cost - £170 – £340
• Additional radiator cost - £280 – £400
• Boxing in boiler cost - £320
• Smart thermostat cost - £280
• Moving boiler cost - £850

How Much to Fit a Boiler? (Labour Only)

Now, let's look at labour costs and timescales.

The average cost for labour when getting a new boiler installed usually falls between £600 and £1,700.

However, these costs are very dependent on whether you are getting the same type of boiler installed as your previous boiler, or if you are having an entirely new type of boiler put in.

The structure of your home and whether you are getting your new boiler in the same place as the old one can also greatly affect the cost of labour.

A good rule of thumb to note is that the more straightforward the job is, the less you are going to end up paying for labour.

To ensure you are getting a good cost for the job at hand, you want to get a range of quotes from trusted companies and experienced local tradespeople.

This way, you can compare the labour costs to ensure you are not paying more than you should be for the work.

It's important to note that the distinction between a national and a local company will impact the price you pay for boiler installation. Bigger companies with higher overheads can cause labour costs to be anywhere from £500 to £1,500 higher than those of local heating engineers.

What Qualifications Do You Need For a Boiler Installation?

You shouldn't install a new boiler as a DIY project. You'll need to hire a competent engineer who is qualified to work with the type of boiler you're looking to get installed.

The consequences of poor boiler installation can be fatal. A boiler should be fitted by someone who is competent in observing any potential dangers with the installation.

While it's not illegal to install your own boiler in some cases, you won't be able to rent out or sell your home until your heating system has been checked by a qualified engineer and brought up to standard if needed.

Depending on the type of boiler you're having installed, your heating engineer will need different certifications:

• Gas boiler installers must be Gas Safe registered, which is a legal requirement for anyone working with gas appliances in the UK.
• Electric boiler installers need to be qualified electricians, NICEIC registered.
• Oil boiler installers must be OFTEC registered.
• Biomass boiler installers need to be HETAS registered.
• All heating engineers, in general, must be qualified plumbers with heating certifications.

How Much Is a New Boiler? (Supply Only)

Boilers range in price depending on the type of boiler and the manufacturer. There are several different types of boilers, and each one comes with its own price and set of pros and cons.

Below is a list of the different types of boilers available to buy, their costs, and some information about each one.

Condensing Boiler Cost

Condensing boilers are a greatly efficient option as they use waste heat in flue gases to pre-heat cold water. A condensing boiler isn’t too expensive and is also efficient enough to cut the costs of your heating bills in the long term.

A condensing boiler falls between £1,450 and £2,850. A condensing boiler is fuelled by either gas or oil, and the water is stored in a water cylinder.

Pros

• ✔ Highly efficient
• ✔ Good water pressure

Cons

• ✖ Requires a bulky water tank

Combi Boiler Cost

Combi boilers are one of the most popular options for new boilers in the UK. A combi boiler is efficient and compact, and takes water directly from the mains.

A combi boiler can run on either electricity or gas, and it is usually small enough to fit into a cupboard. Typically, a combi boiler costs between £600 and £2,300.

Pros

• ✔ Efficient
• ✔ Compact
• ✔ Runs on electricity or gas
• ✔ Small enough to fit in a cupboard
• ✔ Connected to water mains

Cons

• ✖ Water pressure can be weak if multiple taps are used

Conventional Boiler Cost

A conventional boiler is perfect for larger homes. They are composed of two water cylinders – one for heating water and the other for storing the water for usage. This type of boiler is fuelled by gas or oil.

A conventional boiler is usually priced around £500 to £1,700.

Pros

• ✔ Cheap
• ✔ Good water pressure
• ✔ Great for heating larger homes

Cons

• ✖ Requires two water cylinders

Electric Boiler Cost

An electric boiler is a great option for a new boiler as they are energy-efficient and environmentally friendly — running at almost 100% efficiency.

An electric boiler cost around £1,700 to £2,900. It can run off the water mains or via a cylinder.

Pros

• ✔ Very energy efficient
• ✔ Environmentally friendly

Cons

• ✖ Sometimes requires bulky cylinder

Biomass Boiler Cost

A biomass boiler is an extremely environmentally friendly option when it comes to choosing a new boiler.

Biomass boilers work by burning wood to produce the energy required to heat your water. This is usually done with wood chips, pellets, or logs.

A biomass boiler is great for the environment in comparison to other models and is also very energy efficient – you can save up to 30% to 50% on your energy bills. This means that a biomass boiler is a brilliant long-term investment.

A biomass boiler costs around £7,800 to £14,500.

Pros

• ✔ Environmentally friendly
• ✔ Energy efficient
• ✔ Great price in the long-run
• ✔ Good water pressure

Cons

• ✖ Expensive upfront cost
• ✖ Requires bulky water tank

System Boiler Cost

A system boiler heats water straight from the water mains, similar to a combi boiler. This type of boiler does not require a water tank, and this allows for more than one hot water outlet.

This also allows the system to provide hot water through multiple taps without any reduction to the water pressure. A system boiler costs around £1,150 to £2,800.

Pros

• ✔ Doesn’t require a water tank
• ✔ Good water pressure

Cons

• ✖ Runs off gas, so isn’t as energy-efficient as some other models

Boiler Fuel Type

There are several different fuel types for running a boiler. Each fuel type has its own set of pros and cons. Below is a list of the different fuel types that can run a boiler, along with some information on each type.

Natural Gas Fuel

Natural gas is the most common type of fuel used for boilers in the UK. It is a convenient fuel type as it can be transported in both liquid and gaseous forms. Gas boiler prices tend to be cheaper.

Pros

• ✔ Can be transported in liquid and gaseous forms
• ✔ Largely available fuel

Cons

• ✖ Not as energy efficient as some other fuel types

Electricity Fuel

Electricity-fuelled boilers are much better than many other fuelled boilers because they are noiseless, very light, and have low operation and maintenance costs.

Pros

• ✔ Largely available fuel
• ✔ Produces heat without noise
• ✔ Low operation and maintenance costs

Cons

• ✖ Can take longer to heat water than some other fuel types

Oil Fuel

Oil-fueled boilers work in a similar way to gas boilers but are not connected to the gas mains.

Oil is pumped from a tank into the combustion chamber, where it is then vaporised and initiated by the pilot assembly. The oil is stored in a tank close to the property, and it needs to be ordered in advance.

Oil boiler replacement costs are usually around £3,100 in the UK.

Pros

• ✔ Doesn't require access to gas mains
• ✔ Readily available fuel type

Cons

• ✖ Oil needs to be ordered in advance
• ✖ A tank must be close to home for oil storage

Wood Fuel

A biomass boiler can be heated using wood. This requires a firebox where wood is burned to create the required heat for your boiler.

The heat from the wood is usually stored in a hot water tank for use when needed.

Pros

• ✔ Environmentally friendly
• ✔ Energy efficient
• ✔ Wood is easily available

Cons

• ✖ Requires hot water tank
• ✖ Wood-fuelled boilers are expensive upfront

Do I Need a New Boiler?

You may be wondering whether its time to replace your boiler. New models have better energy efficiency, so upgrading can be wise to make the most of energy bill savings.

However, there are also some tell-tale signs to look out for that signal your current boiler is reaching the end of its life.

Common Signs You Need a New Boiler

• Odd noises - If you're hearing popping, knocking, or hissing noises while your boiler's in use, it might be a sign that the internal components are failing.
• Frequent repairs - Your boiler should be serviced once a year, but if you're finding yourself booking additional repair services each year, it can be a sign that it needs replacing with a newer model.
• Leaking system - Repeated leaks or loss of pressure can be cause for concern and can lead to dangerous carbon monoxide leaks. These should always be investigated and, if deemed faulty, replaced as soon as possible.
• Temperature fluctuations - If you've noticed your water takes a long time to heat up or switches between hot and cold when running, it can be an indicator that something's wrong with your boiler.
• Boiler age - If your boiler is over 10 years old, it's time to replace it. Doing so can save you around £250 to £350 per year on your energy bills.
• Planning an extension - You should add a new boiler into your house extension costs if you're planning on extending your home, as your existing boiler may be too small to adequately heat your new square footage.

There are several benefits to having a new boiler installed. A new boiler system might be essential if your old system is failing, but it can also be a welcome upgrade if you want to trim your energy costs and have a better-optimised model.

Here's what you can look forward to:

Boiler Efficiency Improvement

It is estimated that your boiler is responsible for around 60% of your household energy bills. Therefore, if you can make your boiler more efficient by getting a new boiler, you are going to save a lot of money in the long run. The majority of modern boilers are A-rated.

This means that their efficiency is 90% or above. Replacing an old boiler with a modern energy-efficient model could save you around £250 to £350 per year on your energy bills.

Heating Control Improvement

Modern systems allow you to set your radiators to different temperatures in each room. You can even have a thermostat installed so that your system automatically turns off when a room reaches the desired temperature.

This can result in you paying a lot less for your heating bills, especially if there are rooms in the house that you don’t use as much as others.

Quieter Boiler Operation

Due to improved designs and the use of modern materials, a new boiler can be significantly quieter than your old boiler. If your old boiler is relatively noisy when it fires up, you should notice a huge difference in the sound produced by your new boiler. Most modern boiler systems are designed to be very quiet.

Smaller in Size

Modern boilers tend to be much smaller than older models. With this being the case, modern boilers tend to have a lot more options when it comes to sitting them on walls rather than having the rest on the floor. This can result in a lot of saved space in the home.

What's Involved in a New Boiler Installation?

A boiler replacement job is not a DIY project, and should only be completed by a trusted engineer.

Once you have decided you need a boiler replacement and have found the a heating engineer, here's what your installer will do:

• Removal of the old boiler – The time this takes will vary depending on the existing system and the complexity of the job.
• Flush and clean – According to British Standards, your engineer should clean and flush out your system to prevent your new boiler from being damaged by any debris in the system.
• Upgrade and change pipework if required – Your engineer may need to make some changes or updates to your pipework if required.
• Fitting the boiler – The installer will then fit your new boiler. This will either be in the same location as your old boiler, or in a new location, which will take extra time to complete.
• Accessories – A good engineer will always recommend having a system filter installed to fit in with British Standards best practice, which will protect your boiler from any sludge and debris that may build up in the system. Some other accessories that your engineer may recommend include a filling loop or magnetic filter.
• Commissioning of the system – Once your boiler and all accessories and pipework have been completely fitted, your engineer will then commission the system to ensure it's working correctly.
• Complete the handover – Your installer should complete a handover with you when all of the work is complete. This ensures that you are as informed as possible on how to operate the boiler, how to use all of the controls, and how to do some basic maintenance checks during the lifetime of the boiler. This can include topping up the pressure and bleeding radiators.
• Register the boiler – The final step is to register your boiler with the manufacturer so that your product’s guarantee is valid. This will ensure that you are covered in the event that any problems may occur within the warranty period.

Checklist: Getting a New Boiler Installed in 2025

There are a few things you will need to consider before hiring someone to install a new boiler for you.

Below is a list of some of the main things that you should consider when looking for the right contractor for the job:

• Does the engineer offer any guarantees with their work?
• How much is the work to complete? – Ask for a breakdown of costs so you can ensure you are paying a good price for each element of the job.
• What type of boilers does the company offer?
• Is the engineer experienced in fitting the type of boiler that you are purchasing?
• How many years’ worth of experience does the engineer have in fitting new boilers?
• Is the engineer Gas Safe registered?

FAQs

Sources

https://www.planningportal.co.uk/permission/common-projects/boilers-and-heating/planning-permission
https://www.directline.com/home-cover/magazine/need-a-new-boiler
https://great-home.co.uk/new-boiler-benefits
https://www.stovesonline.co.uk/arikazan-ventum-vg-log-gasification-boilers
https://www.prestige-plumbers.co.uk/a-step-by-step-guide-to-boiler-installation/