British Gas New Boiler Cost and Installation Prices 2025

British Gas New Boiler Cost

A new boiler from British Gas will tend to cost between £2,500 and £6,000 including full installation.

They aim to offer professional and affordable boiler installations to properties across the country. The installer seeks to offer you excellent service at the best price.

The cost of your new boiler installation will depend on the brand, type and size of the boiler that is required. For example, a straight combi boiler swap with British Gas tends to cost between £2625.99 - £3,308.60. If you’re in need of a conventional/heat-only boiler swap, you’re likely to pay around £2,807.99 - £3,625.99. For system boiler swaps, you can expect to pay approximately £2,807.99 - £3,625.99.

Published instalation prices, correct and accurate as of 11-01-2025

A new combi boiler from british gas will cost between £2,500 and £5,000 inclduing installation.

Combi boilers are the most popular type of boiler in the UK. You can get an A-rated combi boiler system installed by British Gas at an affordable price. The cost of your new combi boiler installation will depend on the brand, model, and size of the boiler your home requires. To read more about the best boiler brands see our comprehensive guide.

The size of the boiler you need will depend on factors such as the number of radiators you have in your home. Further detail into combi boiler sizes and price is below.

·      Households with up to 10 radiators –24-25kW combi boiler. Prices up to £2,950.99

·      Properties with 10-15 radiators – 28-32kW combi boiler.

·      Homes with 15-20 radiators – 35-40kW+ combi boiler. Prices up to £3,296.99

Published instalation prices (combi swap, same location, horizontal flue), correct and accurate as of 11-01-2025

A new system boiler from British Gas will cost between £3,000 and £5,000 fully installed.

System boilers are designed to suit the needs of homes that have a high demand for heating and hot water. These systems thus tend to be more expensive to install than combi boilers. Nevertheless, British Gas will seek to provide you with the best price for your new system boiler installation.

Like combi boilers, the size of the system boiler you need will affect the price of the installation. The number of radiators in your home will impact the size of the system boiler required. Please see further detail below.

·      Households with up to 10 radiators –15 - 18kW system boiler. Prices up to £3,029.99

·      House with 10-15 radiators – 24kW system boiler. Prices up to £3,739.99

·      Properties with 15-20 radiators – 30kW+ system boiler. 

Published instalation prices (system swap, same location, horizontal flue), correct and accurate as of 11-01-2025

A new conventional or regular boiler from British Gas will cost around £3,000 to £5,000 with installation.

British Gas also install a range of conventional boilers to suit the needs of a variety of homes. If you’re in need of a conventional boiler replacement, British Gas can provide you with an ideal solution at an affordable price.

The size of the conventional boiler required for your home will impact the price that you pay for the installation. The boiler size will depend on the number of radiators you have fitted. Further detail is shown below.

·      Properties with up to 10 radiators – 15 - 18kW conventional boiler. Prices up to £3,029.99

·      Homes with 10-15 radiators – 24kW conventional boiler. Prices up to £3,739.99

·      Households with 15-20 radiators – 30kW conventional boiler.

Published instalation prices (conventional swap, same location, horizontal flue), correct and accurate as of 11-01-2025

Replacing a back boiler with a new combi boiler cost between £4,265 and £6,000 with British Gas.

Do you want to replace your old back boiler with a more modern and energy-efficient combi boiler? If so, British Gas can provide you with an effective and affordable solution to suit your needs.

The cost of replacing your back boiler with a new combi boiler will vary depending on the brand, model, and size of the combi boiler you select. Please note, this type of installation is more expensive due to the additional labour that is required in order to remove the back boiler, as well as the extra pipework and consumables needed to place the new combi boiler in a suitable location.

Published instalation prices (back to combi swap, same location, horizontal flue), correct and accurate as of 11-01-2025

British Gas charge £3,400 to £4,500 to replace a conventional boiler with a combi boiler.

Are you looking to swap your conventional boiler with a combi boiler? If so, British Gas can perform a professional conventional boiler to combi boiler swap for you at an affordable price.

This is another type of installation that is slightly more complicated than a straight like-for-like boiler system swap. Regardless, the engineers at British Gas are skilled and experienced in conducting this job to a high standard.

This installation is more expensive than standard like-for-like swaps due to the required removal of the hot water tank, as well as the additional pipework and consumables needed to move the combi boiler to a suitable area within your property.

For more information on British Gas new boiler installation costs, try our free online quote tool today.

Published instalation prices (conventional to combi swap, same location, horizontal flue), correct and accurate as of 11-01-2025

When looking into getting a cost from Birtish Gas for a new boiler installation it's useful to understand some standard charges the brand have for various items

correct and accurate as of 11-01-2025

If you’re in need of an oil or LPG system, a system boiler, a boiler location change, system swap or a large combi boiler, British Gas will organise for a trained engineer to conduct a home or video survey of your current system to assess your needs. And, of course, British Gas will also price a job for you to install a full central heating system, which depending on requirements and number of radiators could cost from £3,500 up to £7,500.

British Gas install a variety of boiler systems to suit the needs of different homes across the UK. Looking for a new gas combi boiler for a small to medium property? This installer can provide you with an online quote and allow you to purchase your new boiler after answering a few simple questions about your home and heating needs.

British Gas installers fit systems from leading brands such as Worcester Bosch, Vaillant, Ideal, Vaillant, Potterton, Baxi and Glow Worm. They also replace back boilers with more modern combi boiler systems. The vast majority of these boiler brands are very highly rated in our best boiler brand guide.

British Gas is the UK’s largest energy and home services company. They are a subsidiary of the larger organisation Centrica, and their headquarters are based in Windsor.

Founded in 1995 through privatisation, British Gas is recognised for conducting first-class boiler installations across the country. Whether you’re in need of a combi, system or regular boiler, this experienced installer can provide you with an affordable boiler replacement.

If you'd like to understand and compare all aspects to New Boiler Costs then you need to read our definitive guide, if you'd like to find out more about British Gas new boiler costs read on below.

To get a new boiler with British Gas, you’ll need to visit their website and navigate to the new boiler section. Select “Choose your new boiler” and proceed to answer a few questions about your home and central heating needs. The questions will cover matters such as your fuel type, boiler type, boiler location, flue and the number of bathrooms, showers, and radiators that you have in your property. Your will also be asked to provide your contact details.

Once all of the questions have been answered the quote tool will provide a selection of suitable boiler options for you to choose from. Once you’ve selected the best choice for your home, British Gas will provide you with some more information about your chosen system, allowing you to “Get to know your boiler.” They will also provide you with a breakdown of costs, including the monthly payment plans that may be available.



Once you’ve confirmed your order, you’ll be asked to confirm your address and contact details, then you’ll be provided with your free quote and taken to a payment window. Once you’ve confirmed your payment method, you’ll be able to book your new boiler installation with British Gas. You’ll have the choice of paying for your boiler outright using a credit or debit card, or you can select a flexible finance option to spread the cost of your new boiler installation monthly.

The good news is there are various ways to pay for yor new boiler from British Gas and lots of deals on offer.

One of the best ways to find out more about British Gas and their services is to take a look at their reviews. The installer currently has over 127,000 reviews on Trustpilot and an overall “Average” rating of 3.4 out of 5. Their score is made up of 45% of 5-star ratings, 11% of 4-star reviews and 32% of 1-star ratings.

British Gas perform poorly in term of Boiler Installation Reviews compared to their competitors: they have the lowest number of 5-star reviews out of all of the boiler installers in the the UK and the most 1-star reveiws only closely followed by Eon.

correct and accurate as of 11-01-2025

British Gas are a household name and a former monopoly. Which goes hand in hand with lots of awareness and therefore consumer consideration when it comes to new boiler installation. However, as we have found out in this review, they can be more expensive than many of their competitors. So our advice will always to be to undertake a market comparison and choose a new boiler based on your requirements which is also good value for money. Utilising a service such as Improve My Home with our Free online boiler quote could get you the same boiler for almost £1,000 cheaper.

FAQs British Gas New Boiler Cost

British Gas have a lot of reviews on Trustpilot, almost 128,000 of them. However their Trust Score is only 3.4 out of 5, which isn't world class. Under two thirds of their reviews, only 57%, are either 5-star (46%) or 4-star (11%) meaning they some customers are not fully satisfied with their product offering and value equation.

£2,271.99 is the price of the cheapest combi boiler installation from British Gas, which only comes with a 5 year warranty. Obviously for more complicated jobs that involve a new boiler location, a larger capacity boiler or a more complicated system swap will increase the price.

You can probably save money on a like for like new boiler installation using a comparison service like Improve-My-Home rather than going direct to British Gas.

Yes, in short. British Gas tend to charge more than many of their direct competitors mailny due to their huge overhead base and the vast amount of money they spend on marketing. Having said that it is still possible to find a good deal on a new boiler installation from British Gas and they also offer fairly competitive finance packages.

Fourteen days is the claim although unless you are very unlucky the price after 14 days will not be materially different.

No, British Gas do not offer a fixed price boiler quote online, well at least not yet. Their current stance is a revenue protection one but it seems enevitable they will offer a fixed price onlien quote as that's the way the whole boiler installation market is moving.

Combi boiler installation from British Gas starts at £2,271.99 and increases based on the job type, job complexity and output required for the buildings heating and hot water.

A simple combi boiler swap job can be as quick as 3 hours, but typically will take the best part of a day. This can increase to anything up to and beyond 5 days for more complicated and bigger installations.

Boiler Services from British Gas start from £85 and are generally a requirement from boiler manufacturers to keep boiler warranty valid.

British Gas have 4 tiers of cover plans: Basic at £19 a month, Essential at £21 a month, Classic at £25 a month and the top of the range Complete plan at £27 a month.