Get 20% OFF[1] a brand new boiler and keep your home warm all winter long. Find out more.

Boiler cost calculator

Get an estimate for buying a new boiler from British Gas. It'll only take a couple of minutes.

If we think it'll be a straightforward job to replace your boiler you can get an online quote to book and buy online. If not, you can book a free home visit from a Heating Advisor.

Payment options to suit you

Pay in full

You can pay for your boiler in full with major debit and credit cards or by cheque.

Once you agree to an installation, we’ll usually take a 10% deposit. The full amount is only paid once your new boiler is up and running.


Pay monthly

As a credit broker, we can arrange a finance agreement through Barclays Partner Finance, meaning you can choose to spread the cost of your new boiler over three to ten years.[2]

  • 14.9% representative APR.
  • No upfront deposit required.
  • Make additional payments at any time (subject to charges).

A representative example of a payment plan

† The rate of interest is variable downwards only. It cannot go up.

Reasons to choose British Gas

91% of customers recommend us

British Gas boiler installations are recommended by 91% of customers.

See how customers rate us

Pay monthly with no upfront deposit

We could help you spread the cost over 3-10 years or you could choose to pay in full if you’d prefer.

Payment options

Your home is left clean and safe

Our Engineers leave your home neat and tidy and will arrange the safe disposal of all waste.

Step by step guide

Aftercare included

This offer includes a year's free aftercare which provides service and repair for your boiler, controls and central heating system for one year.

Latest offers

British Gas New Heating Limited is authorised and regulated by the Financial Conduct Authority for its consumer credit activities. Registered in England and Wales 6723244.

[1] This offer is valid until the 31st December 2015 and is available for domestic properties only (up to 40kW). It excludes warm air units. The 20% discount is off the cost of the boiler only and will be applied at point of sale on the basis that we install the boiler. You can't use this offer with another British Gas offer unless the offer states that it's ok.

[2] Clydesdale Financial Services Limited T/A Barclays Partner Finance. Availability of credit depends on your status and credit checks.

[3] Mon-Fri 7:30am-8pm, Sat 8am-6pm, Sun 8:30am-5pm. Limited service applies during public holidays.

* 91% recommendation rating is based on 4,967 customer responses collected between 09/12/2014 & 15/06/2015.

91% of customers recommend British Gas boiler installations*. See below for more detail on how they rate it. Reevoo

British Gas Boiler Installation Service reviews verified by Reevoo

7,445 reviews

Reviews from: Sort by:
(9.0 out of 10)
Quality of installation
Advice from Heating Adviser
Overall rating
Scores 9.0 out of 10 based on 7445 reviews
Show more score details
(10 out of 10)


very pleased with the service overall
3 of 7 people found this review helpful
Published on: 13 November 2015
(8 out of 10)


Teldord Homeowner
apparent problems with electric wiring resulted in further visits by an engineer.
2 of 4 people found this review helpful
Published on: 13 November 2015
(10 out of 10)


Coventry Homeowner
Really nice Guy. Quiet, clean, efficient and thoughtful.
If we have more work done would love him to come to do it
4 of 5 people found this review helpful
Published on: 10 November 2015
(9 out of 10)


Thurrock Homeowner
Work carried out expeditiously and professionally.
3 of 4 people found this review helpful
Published on: 09 November 2015
(10 out of 10)


Sudbury, Suffolk Homeowner
The new boiler installation went very smoothly with a minor 'hiccup' related to the new Hive Unit which was patiently and thoroughly sorted out by your technician. Great customer support over the phone, nothing seems too much of a problem :)
2 of 2 people found this review helpful
Published on: 09 November 2015
(9 out of 10)


Cannock Homeowner
Entirely satisfied with all work carried out.
4 of 4 people found this review helpful
Published on: 08 November 2015