Eco Happy (Solar Expert)

Published February 8, 2024

Who is British Gas?

British Gas are a household name in energy supply, boiler cover and new boiler installation. They are the largest boiler installer in the UK by far, installing c. 100,000 domestic boilers a year, which is about 10% market share. But do they offer competitive prices and good value for money on like for like installations?

To find out we have conducted extensive market research and are proud to share our findings here, updated for 2023, helping you make up your mind who to choose to install your new boiler. Within the research we have compared like for like gas boiler installation prices between British Gas and two of their major competitors: HomeServe, the home cover and repair specialists who also have a boiler installation arm and BOXT the fully online boiler retailer. And to really understand what you are paying for we have also undertaken a like for like comparison of the two ways to purchase a boiler from British Gas; the more traditional home survey and in home sale and British Gas’ new online survey and purchase offering.

British Gas Van

How much does a new boiler cost from British Gas?

The traditional way to buy a new boiler is to book a survey of your home, where a qualified engineer or more likely a sales person visits your home, inspects your existing boiler and heating system and recommends the right replacement product to suit your requirements.

British Gas used to offer an online estimate on their website before you book the survey so you can get an indicative price. Now the British Gas main process is choose either a home survey or video survey and no prices are shown until the survey has happened, which is a fairly antiquated process given it is 2023 and most of the competitive set are online surveys only. The home survey is a labour intensive process as the surveyor will need to be in your property for about an hour, plus driving time. So even before you decide to purchase a new boiler from British Gas they have already spent a lot of time and money, which will need to be recouped from customers. And on top of that being such a big organisation with a huge back office and customer service support structure they have a huge overhead to cover.

So the key question is are British Gas a lot more expensive than some of their leaner competition? Our research has uncovered some key facts and themes about headline prices and the overall value proposition of these three mainstream boiler installers. To keep the comparison as fair as possible we’ve used identical jobs – swapping combi boilers for combi boilers and conventional boilers for conventional boilers, installed in the same location with a horizontal flue including the smart thermostat on offer from each of the installers.

British Gas New Boiler Quote

What are the latest British Gas boiler installation costs?

We estimate British Gas will charge £3,177.99 for the installation of a Worcester Bosch Greenstar 4000 25kW and include a Hive mini smart thermostat and a 5 year warranty. They also have up to 4 years months 0% APR finance available, subject to status. But, if you go direct to the British Gas online purchase website and buy exactly the same boiler package you can have it installed for £2,727.99, a whopping £450 cheaper (-17%). Meaning they are charging customer £450 for the home survey. Unfortunately, the British Gas online purchase is only available for simple combi boiler replacement and conventional replacement jobs at the moment.

HomeServe offer the exact same boiler install with the exact same Worcester Bosch boiler for £2,499 which is £679 (-8%) less than British Gas. The offer 24 months 0% APR finance package vs. the 48 months available from British Gas, and you get a home survey. the only real difference is swapping the Hive smart thermostat for a Netatmo smart thermostat. You also only get the same warranty as BG, with 5 years as standard. Meaning customers who really want and value a home survey to make sure they get the right specification boiler should probably choose HomeServe over British Gas.

BOXT have disrupted the boiler installation market. They are an online only model, meaning they are very lean and can pass those cost savings onto customers, which can be seen by their very keen pricing structure. They offer exactly the same Worcester Bosch boiler installation for just £2,140, a whopping -£1,038 saving (-33%) versus the British Gas home survey price. And you don’t really have to compromise, they include a 10 year warranty (double that of British Gas) and a thermostat, which isn’t quite as flash as a Hive but day to day you probably won’t notice. Certainly the difference in experience won’t be worth £1,038! The online journey is really user friendly and is built in such a way that you don’t need any technical knowledge about boilers and central heating to select the right boiler for you home.

In summary if you really want the reassurance of a mega brand like British Gas you will pay a premium. If you still want a home survey but want to save some money versus British Gas get a quote from HomeServe. And if you really want a bargain and are happy buying online you can really save some money using an online only service like BOXT. 

British Gas Home surveyBritish Gas Online OnlySaving vs BG Home SurveyHomeServeSaving vs BG Home SurveyBOXTSaving vs BG Home Survey
Installed price Worcester Bosch Greenstar 30i ERP£3,177.99£2,727.99-£450£2,499-£678.99£2,140-£1,037.99
Boiler Finance48 month 0% APR48 month 0% APR24 month 0% APR120 month 10.9% APR
Smart ThermostatHive miniHiveNetatmoEsi programable
Warranty5 years5 years5 years10 years
data correct as of 01-01-2023. online published installation prices: combi combi swap, same boiler location, horizontal flue. Home Survey price calculated as online installation price plus £950 cost for home survey surveyor cost.

Latest British Gas Combi boiler costs

British Gas’ online purchase is currently limited to only combi to combi swaps and conventional to conventional swaps. The customer journey is fairly straight forward, but not as slick as some competitors such as BOXT and iHeat. And they seem to have been very risk averse, only letting you progress online if you are replacing a combi boiler in the same location and it’s on the ground floor with a horizontal flue. at the time of publishing British Gas also only offered combi boilers from 4 manufacturers: Ariston, Worcester Bosch, Vaillant and Ideal.

The online purchase journey is still very limited, especially so as it is 2023. Any deviation from the most simple of boiler installation jobs results in the end of the online journey and the request to have a survey done, displaying a lack of ambition from British Gas. Should your boiler be powered by LPG or Oil there is no online option, likewise if you want to change system type from Combi to Conventional or vice versa the online journey shuts down. And the same is true for boiler moves, vertical flues or high output requirements.

All published British Gas Combi boiler installation prices are detailed in the table below:

Purchase MethodBoilerOutput (kW)WarrantyFinance availableSmart StatOnline Installation PriceOnline pay monthly price
Online PurchaseAriston Clas One 2424kW5 yearsup to 4 years interest free creditHive mini£2,271.99£47.33£3,221.99
Online PurchaseWorcester Greenstar 400025kW5 yearsup to 4 years interest free creditHive mini£2,727.99£56.83£3,677.99
Online PurchaseVaillant ecoFIT pure 82525kW5 yearsup to 4 years interest free creditHive mini£2,950.99£61.48£3,900.99
Online PurchaseIdeal Logic35kW5 yearsup to 4 years interest free creditHive mini£3,235.99£67.42£4,185.99
Online PurchaseVaillant EcoFIT Pure 83535kW5 yearsup to 4 years interest free creditHive mini£3,286.99£68.48£4,236.99
Online PurchaseWorcester Bosch Greenstar 8000 Life35kW5 yearsup to 4 years interest free creditHive mini£3,296.99£68.89£4,246.99
data correct as of 01-01-2023. online published installation prices: combi combi swap, same boiler location, horizontal flue. Home Survey price calculated as online installation price plus £950 cost for home survey surveyor cost.

Latest British Gas Conventional boiler costs

The same restrictions of the online journey are true for Conventional boilers albeit British Gas offer more conventional boiler options online than they do for Combi Boilers. The prices are continually higher than those offered by the online competitors such as BOXT, iHeat, Heatable and Warmzilla.

Conventional boiler installation prices start from £2,927.99 for a 15kW Worcester Bosch Ri and rise to £3,739.99 for the higher output 24kW Worcester. British Gas obviously offer higher output boilers, but again the customer will have to go through the additional expense and time constraints of having a survey undertaken in order to get these higher capacity boilers.

Purchase MethodBoilerOutput (kW)WarrantyFinance availableSmart StatOnline Installation PriceOnline pay monthly priceHome Survey Price Estimate
Online PurchaseWorcester Greenstar Ri15kW5 yearsup to 4 years interest free creditHive mini£2,927.99£61.00£3,877.99
Online PurchaseVaillant ecoFIT pure 41515kW5 yearsup to 4 years interest free creditHive mini£2,993.99£62.40£3,943.99
Online PurchaseWorcester Greenstar Ri18kW5 yearsup to 4 years interest free creditHive mini£2,958.99£61.65£3,908.99
Online PurchaseGlowworm Energy 18r18kW5 yearsup to 4 years interest free creditHive mini£2,973.99£61.96£3,923.99
Online PurchaseVaillant ecoFIT pure 41818kW5 yearsup to 4 years interest free creditHive mini£3,029.99£63.12£3,979.99
Online PurchaseVaillant ecoFIT pure 42424kW5 yearsup to 4 years interest free creditHive mini£3,056.99£63.69£4,006.99
Online PurchaseWorcester Greenstar Ri24kW5 yearsup to 4 years interest free creditHive mini£3,739.99£77.92£4,689.99
data correct as of 01-01-2023. online published installation prices: conventional conventional swap, same boiler location, horizontal flue. Home Survey price calculated as online installation price plus £950 cost for home survey surveyor cost.

Latest British Gas System boiler costs

British Gas also install System Boilers from the broad range of manufacturers they utilise. Prices are similar to conventional boiler installations and range from £2,927.99 for the online price of a Worcester Greenstar Si 15kW up to £4,689.99 for a Worcester Greenstar Si 24kW with a home survey.

Purchase MethodBoilerOutput (kW)WarrantyFinance availableSmart StatOnline Installation PriceOnline pay monthly priceHome Survey Price Estimate
Online PurchaseWorcester Greenstar Si15kW5 yearsup to 4 years interest free creditHive mini£2,927.99£61.00£3,877.99
Online PurchaseVaillant ecoFIT pure 41515kW5 yearsup to 4 years interest free creditHive mini£2,993.99£62.40£3,943.99
Online PurchaseWorcester Greenstar Si18kW5 yearsup to 4 years interest free creditHive mini£2,958.99£61.65£3,908.99
Online PurchaseGlowworm Energy 18s18kW5 yearsup to 4 years interest free creditHive mini£2,973.99£61.96£3,923.99
Online PurchaseVaillant ecoFIT pure 41818kW5 yearsup to 4 years interest free creditHive mini£3,029.99£63.12£3,979.99
Online PurchaseVaillant ecoFIT pure 42424kW5 yearsup to 4 years interest free creditHive mini£3,056.99£63.69£4,006.99
Online PurchaseWorcester Greenstar Si24kW5 yearsup to 4 years interest free creditHive mini£3,739.99£77.92£4,689.99
data correct as of 01-01-2023. online published installation prices: system system swap, same boiler location, horizontal flue. Home Survey price calculated as online installation price plus £950 cost for home survey surveyor cost.

Latest British Gas back boiler to combi boiler costs

The installation of new back boilers is illegal, so when they come to the end of their useful life they need to be replaced with a different boiler type, most commonly a combi boiler. These jobs tend to be more expensive due to the additional complexity and the fact the boiler needs to move location. British Gas quote their boiler installation cost for this job type form £4,025.99 for the Worcester 2000 25kW to £4,708.60 for the Worcester 8000 Style 35kW.

BoilerOutput (kW)WarrantyFinance availableSmart StatHome Survey Price Estimate
Vaillant ecoFIT pure 82525kW5 yearsup to 4 years interest free creditHive mini£4,262.99
Glowworm Energy 25c ErP25kW5 yearsup to 4 years interest free creditHive mini£4,072.99
Worcester Bosch Greenstar 200025kW5 yearsup to 4 years interest free creditHive mini£4,025.99
Vaillant ecoFIT pure 83030kW5 yearsup to 4 years interest free creditHive mini£4,249.99
Worcester Bosch Greenstar 8000 Style35kW5 yearsup to 4 years interest free creditHive mini£4,708.60
Vaillant ecoFIT pure 83535kW5 yearsup to 4 years interest free creditHive mini£4,588.99
Worcester Bosch Greenstar 8000 Life35kW5 yearsup to 4 years interest free creditHive mini£4,568.60
data correct as of 01-01-2023. online published installation prices: back to combi boiler swap, same boiler location, horizontal flue. Home Survey price calculated as online installation price plus £950 cost for home survey surveyor cost.

Latest British Gas Conventional Boiler to Combi Boiler costs

British Gas undertake many conventional boiler swap jobs, replacing the old conventional boiler with a new combination boiler, due to the increased convenience of instantly available hot water and additional space by not having a hot water tank. As with all boiler installation jobs the price depends on the capacity required and the boiler manufacturer chosen. The quoted British gas costs are from £3,325.99 for a Worcester Greenstar 2000 25kW right up to £4,008.60 for the Worcester 8000 Style 35kW.

BoilerOutput (kW)WarrantyFinance availableSmart StatHome Survey Price Estimate
Vaillant ecoFIT pure 82525kW5 yearsup to 4 years interest free creditHive mini£3,562.99
Glowworm Energy 25c ErP25kW5 yearsup to 4 years interest free creditHive mini£3,372.99
Worcester Bosch Greenstar 200025kW5 yearsup to 4 years interest free creditHive mini£3,325.99
Vaillant ecoFIT pure 83030kW5 yearsup to 4 years interest free creditHive mini£3,549.99
Worcester Bosch Greenstar 8000 Style35kW5 yearsup to 4 years interest free creditHive mini£4,008.60
Vaillant ecoFIT pure 83535kW5 yearsup to 4 years interest free creditHive mini£3,888.99
Worcester Bosch Greenstar 8000 Life35kW5 yearsup to 4 years interest free creditHive mini£3,868.60
data correct as of 01-01-2023. online published installation prices: conventional conventional swap, same boiler location, horizontal flue. Home Survey price calculated as online installation price plus £950 cost for home survey surveyor cost.

British Gas Boiler installation cost calculator

Using British Gas’ now retired online estimate tool our research has uncovered how much they charge for different types of boiler installation jobs. Obviously these prices may have changed slightly since the were last published but we don’t think any changes will be material so the data is still very useful as a guide. 

If you wish to have the new boiler in a different place in the same room British Gas will charge you £300 more. Same floor different room and up one floor both cost an extra £400, whilst if you wish to move your boiler up two floors it is an extra £500.

Large capacity combi boilers cost £3,545, which should be enough for a 5 bedroom detached house with over two bathrooms. Changing system types is generally more expensive with British Gas charging £3,385 for a small capacity combi boiler to replace a conventional whilst a large capacity combi to replace a conventional would be more like £4,145.

PropertyBedroomBathroomExisting Boiler TypeNew Boiler TypeLocationOnline Price EstimateMoving Charge
detached11combicombisame as old£2,785n/a
detached5+2+combicombisame as old£3,545n/a
detached11convconvsame as old£2,755n/a
detached42+convconvsame as old£2,905n/a
detached11combicombisame room different place£3,085£300
detached11combicombisame floor different room£3,185£400
detached11combicombiup one floor£3,185£400
detached11combicombiup two floors£3,285£500
detached11convcombisame3385n/a
detached5+2+convcombisame4145n/a
data correct as of 01-01-2023. online published installation prices: horizontal flue

Which boilers do British Gas install?

British Gas install boilers from a wide range of manufacturers across the whole spectrum from premium boilers right through to value for money boilers. The current list of approved manufacturers they install includes:

  • Vaillant
  • Worcester Bosch
  • Glow Worm
  • Ariston
  • Ideal

Latest British Gas New Boiler Offers, Deals and pay monthly finance options 2023

British Gas constantly have a program of deals and special offers running on their new boiler sales. Taking advantage of these promotions can save you a decent amount of money and make the British Gas Boiler Quote more competitive. The offers usually include a finance offer, a headline discount off the boiler installation price or a discount for recycling your old boiler. Offers include:

  • up to 4 years interest free credit 
  • £0 deposit options on new boilers
  • £200 off boiler installation for Home Care customers

British Gas Boiler Installation Reviews

British Gas Trust Pilot

For such a big company with a huge, centralised customer service department British Gas’s reviews are a little under whelming. Our algorithm collates all the ratings for British Gas and calculates an overall aggregated review score of 3.4 out of 5 from 127,826 reviews which equates to a score of Average as it lands between 3.1 and 4 out of 5.

The bulk of the reviews come from Trustpilot are Excellent (45%) or Great (11%), meaning 56% were really happy with the service they received from British Gas. However over two thirds of customers rate them as sub-standard with 5% rating them as Poor and 32% rating them as Bad.

Review SiteRating (out of 5)Number of Reviews
Trustpilot3.4125,786
Reviews.io1.22,040
New-Boiler-Cost.com aggregated reviews3.4127,826
data correct as of 01-01-2023

TrustpilotVolume of Reviews% of Reviews
Excellent – 5-star57,04045%
Great – 4-star13,74811%
Average – 3-star8,1157%
Poor – 2-star6,5935%
Bad – 1-star40,29032%
Total125,786100%
data correct as of 01-01-2023

British Gas Boiler Prices – should you choose them?

British Gas are a large organisation with big overheads and a huge cost base to cover. Therefore boiler installation prices tend to be more expensive than local installers, regional installers and indeed online only installers, sometimes to the order of magnitude of up to £1,038 more expensive than online competitors such as BOXT. Now, of course, that doesn’t mean you can’t get a good deal from British Gas to have a new boiler installed, rather you, as an empowered consumer, should do your research, compare prices from a shortlist of installers and choose the right option for your needs.

FAQs British Gas Boilers

How much is a British Gas boiler?

New boilers installed by British Gas cost between £2,271.99 for an online purchase up to over £5,000 for a complex installation with a home survey.

How long does a British Gas boiler quote last?

An online quote will take a couple of minutes, whereas a quote from a home survey will last about 1 hour. Once you have received the quote it is valid for 14 days.

How much is a combi boiler from British Gas?

British Gas combi boilers start from £2,271.99 with the price depending on the size of boiler required and the complexity of the installation.

How much is a boiler service with British Gas?

British Gas boiler services start from £85.

How long does a new boiler install take with British Gas?

British Gas boiler install timelines depend on the complexity of the job. A very straight forward installation of a new combi boiler in the same location as the old boiler can take as little as half a day. A very complicated job to replace the whole central heating system in a new location and changing boiler type can take over 5 days.

What are the alternatives to British Gas for a new boiler install?

British Gas are the market leader for boiler installation but there are many alternatives in the market ranging from local boiler installers, regional boiler installation companies, uk wide boiler installation firms like HomeServe and online boiler installation companies like BOXT, Heatable and iHeat.

British Gas Company Information

British Gas is a trading style of Centrica PLC, Company number 03033654

Registered Address

Millstream Maidenhead Road, Windsor, Berkshire, SL4 5 GD

Company Active and incorporated 16 March 1995

Nature of Business (SIC): 35110 – Production of electricity, 35130 – Distribution of electricity, 35210 – Manufacture of gas, 35220 – Distribution of gaseous fuels though mains

Directors:

Dr Rajarshi Roy, appointed 30th September 2020

Carol Ann Arrowsmith, appointed 11th June 2020

Nathan Mark Bostock, appointed 9th May 2022

Chanderpreet Duggal, appointed 16th December 2022

Heidi Mottram, appointed 1st Jan 2020

Kevin O’Byrne appointed 13th May 2019

Chritopher Michael O’Shea, appointed 1st November 2018

Katherine Beresford Ringrose, appointed 18th January 2021

Rt Hon Amber Augusta Rudd, appointed 10th January 2022

Jonathan Scott Wheway, appointed 1st May 2016

Group of companies’ accounts made up to 31 Dec 2021, next accounts due by 30 June 2023

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