How Much Is a New Boiler From British Gas

How Much Is a New Boiler From British Gas in 2026?

A new boiler from British Gas costs between £2,800 and £4,500 installed in 2026, depending on the boiler type, output rating, and the complexity of your installation. That is typically 15 to 30 percent more than the equivalent job from a well-reviewed independent Gas Safe registered engineer.

Important notice: InstantGrant is an independent grant information and application-support service. We are not British Gas, the UK government, Ofgem, or any funding body. We do not install boilers, award grants, or act on behalf of any energy company. Information on this page is based on publicly available pricing data and verified grant scheme details checked against GOV.UK. Always get a confirmed quote directly from British Gas or an alternative installer before committing to any work.

Whether that premium is worth paying depends on what you actually get in return. This guide breaks down the real British Gas boiler costs, what is and is not included, how their offering compares to alternatives, and whether any government grant applies to your situation.

British Gas Boiler Prices in 2026

British Gas does not publish a simple fixed price list. Every job is quoted individually, either through their online quoting tool or following an in-home survey. Based on verified industry data and customer reports from 2026, here is what most homeowners pay.

Prices by Boiler Type

For comparison, an independent Gas Safe registered engineer typically charges £1,800 to £3,500 for the same combi swap. The gap between British Gas and the independent market is real — and it is worth understanding exactly what you are paying for before deciding which way to go.

What the British Gas Price Includes

A standard British Gas boiler installation includes the boiler unit, labour from a Gas Safe certified engineer, a standard flue, basic system commissioning, a system water treatment and cleanse, and a 5-year British Gas warranty. Every boiler they supply is A-rated for efficiency.

What Costs Extra

Several things are not included in the base quote and will push your final figure higher:

Hive Active Heating thermostat. British Gas promotes Hive, their own smart thermostat range. Adding Hive to your installation costs an additional £250 to £350. It is an optional extra, not a requirement.

Extended warranty. The standard 5-year warranty is included. Extending it to 12 years costs extra. Whether this is worth it depends on the specific boiler model — some manufacturer warranties from Worcester Bosch or Vaillant through accredited independent installers already reach 10 to 12 years at no additional cost.

HomeCare cover. British Gas will almost always recommend adding a HomeCare plan to your installation. This is an ongoing monthly payment (starting from around £22 per month with a £60 excess), not part of the installation price. See the HomeCare section below for a full breakdown.

Relocation and complex pipework. Moving the boiler to a new location, replacing old pipework, or converting from a system to combi setup adds to both labour time and material costs.

Which Boilers Does British Gas Install?

British Gas installs boilers from a set range of manufacturers — primarily Worcester Bosch, Vaillant, Glow-Worm, Viessmann, and their own Hive-branded models.

You Cannot Supply Your Own Boiler

This is something many homeowners do not realise until they get a quote. British Gas will not install a boiler you purchase yourself or sourced elsewhere. If you have a specific model in mind — such as a Viessmann Vitodens or a Vaillant ecoTEC Pure — that a British Gas quote does not include, you will need to use an independent installer who stocks that model.

This matters when you are comparing quotes. Make sure you are comparing the same boiler brand and model across quotes, not just the headline installation figure.

British Gas Warranty: What It Actually Covers

The standard British Gas installation comes with a 5-year warranty covering parts and labour. This is a British Gas warranty — separate from the manufacturer's own warranty, which varies by model and installer accreditation.

The Annual Service Requirement

To keep your warranty valid, your boiler must be serviced every 12 months by a qualified engineer. British Gas offers a standalone annual service for around £99, or you can include servicing within a HomeCare plan.

This is important to understand before you sign. If you do not service the boiler annually — or if it is serviced by someone outside the criteria — British Gas can void the warranty. Most manufacturer warranties carry the same condition, but it is worth confirming the exact terms on your specific model before installation.

British Gas HomeCare: Is It Worth It?

HomeCare is British Gas's ongoing home maintenance cover. It covers annual boiler servicing, unlimited callouts and repairs, and optionally extends to central heating, plumbing, and home electrics depending on the tier.

HomeCare Costs

HomeCare starts from around £22 per month with a £60 excess per callout. Higher tiers covering full central heating and plumbing cost more. Prices are personalised based on your boiler age, property type, and cover level.

The Honest Assessment

HomeCare has genuine value for homeowners who want a single point of contact for all heating emergencies, the peace of mind of unlimited callouts, and automatic annual servicing that keeps their warranty valid.

It costs more than equivalent standalone cover from smaller providers. If you are disciplined about booking an independent annual service (which costs around £70 to £120 in 2026) and comfortable paying for repairs when they arise, you can typically spend less outside of HomeCare across a given year.

HomeCare is not required to proceed with a British Gas installation. Do not feel pressured to add it at the point of quoting.

British Gas Discounts and Finance Options

HomeCare Loyalty Discount

If you are already a British Gas HomeCare customer at the time of installation, you qualify for £200 off the quoted price. This is worth confirming at the time of quoting.

0% APR Finance

British Gas offers interest-free finance on selected boiler installations, with 0% APR available for up to 3 years on eligible models. This spreads the cost without adding to the total, provided the balance is cleared within the interest-free period. Finance is subject to credit approval.

Seasonal Offers

British Gas runs promotional discounts periodically. Booking outside peak season — spring and summer rather than October to January — can save £100 to £300 compared to peak winter pricing, when demand is highest and engineers are busiest.

Government Grants and British Gas: What Is Available

This is where the picture gets more interesting than most competitors let on.

ECO4: British Gas Is a Delivery Supplier

ECO4 is the UK government's Energy Company Obligation scheme. Large energy suppliers — including British Gas — are required by Ofgem to fund home energy improvements for qualifying households as part of their regulatory obligation. British Gas is one of the primary ECO4 delivery suppliers.

What this means in practice: if someone in your household receives a qualifying means-tested benefit (such as Universal Credit or Pension Credit) and your home is rated EPC band D to G, you may qualify for a fully funded boiler repair or replacement delivered through British Gas or another large supplier — at no cost to you.

ECO4 closes on 31 December 2026. If you think you may qualify, contact British Gas or your energy supplier now. Applications submitted close to the deadline may not complete in time.

ECO4 is available across England, Scotland, Wales, and Northern Ireland, but it is delivered by each supplier according to their own obligation targets. Availability of specific measures depends on your supplier's remaining budget for the scheme period.

The Boiler Upgrade Scheme: Does It Apply Here?

The Boiler Upgrade Scheme (BUS) gives £7,500 off the installed cost of an air source or ground source heat pump. British Gas does install heat pumps. If you are considering switching from gas to a heat pump through British Gas, the BUS grant applies in England and Wales — ask explicitly about MCS certification at the quoting stage, as the installer must be MCS-certified to apply for the grant on your behalf.

The BUS does not apply to a gas boiler replacement, whether through British Gas or any other installer.

Warm Homes: Local Grant

The Warm Homes: Local Grant is a council-led scheme running to 2028 in England, for households with income under £36,000 or in a designated low-income postcode. It covers insulation, low-carbon heating, and solar — not a like-for-like gas boiler swap. Check with your local council whether your area is participating.

Grant Availability by UK Nation

Scotland: Home Energy Scotland provides equivalent support for low-income and benefit households through the Warmer Homes Scotland scheme. Contact Home Energy Scotland on 0808 808 2282 for a free assessment.

Wales: The Nest scheme provides free home energy improvements for low-income households in Wales, including heating system upgrades. Administered by Warm Wales.

Northern Ireland: The Bryson Energy Affordable Warmth scheme and the NI Boiler Replacement scheme cover eligible households. Contact Bryson Energy or your Housing Executive for current availability.

British Gas vs Independent Installer vs Online Installer

Is British Gas Worth the Premium?

For some homeowners, yes. The British Gas premium buys you a national engineer network, a 5-year parts and labour warranty, interest-free finance, and a single point of contact for all aftercare. If you value simplicity and the reassurance of a nationally recognised brand, those things have real worth.

For others, no. An independent Gas Safe installer with good reviews, fitting the same boiler brand with an equivalent manufacturer warranty, will usually do an equally good job for £500 to £1,200 less. The boiler itself is the same product. What you are paying extra for is the British Gas name and infrastructure, not a fundamentally better installation.

The most useful thing you can do before committing is get three quotes — British Gas, one online installer, and one well-reviewed local Gas Safe engineer — for the same boiler model. That comparison will tell you more than any price guide.

"Free Boiler from British Gas" Scams

Searches involving British Gas and free boilers attract a significant volume of fraudulent activity. Scammers use the British Gas name to add credibility to fake grant offers.

How the Scam Works

You receive an unsolicited call, text, or social media message claiming you have been selected for a free boiler replacement funded by British Gas or the government. The caller asks for personal details and sometimes an upfront "admin fee" to process the grant.

The Warning Signs

• Unsolicited contact claiming you qualify without asking any eligibility questions

• Pressure to act immediately or the offer will expire

• Any request for an upfront payment — legitimate UK government grants and genuine supplier obligations never require this

• An engineer arriving at your door unannounced offering a free survey

What to Do

If you receive an unsolicited contact referencing British Gas or a government grant, verify it independently at britishgas.co.uk or GOV.UK before sharing any personal information. Report suspected fraud to Action Fraud at actionfraud.police.uk or by calling 0300 123 2040.

British Gas itself warns customers about impersonation scams on its own website.

How Long Does a British Gas Boiler Installation Take?

A standard like-for-like combi boiler swap through British Gas takes one day. British Gas advertises next-day installation on some models, though availability depends on your area and the time of year. Between October and January, when demand peaks, wait times can be longer. In quieter months — spring and summer — booking is typically faster and pricing can be more competitive.

A system conversion or back boiler removal takes two to three days. A heat pump installation takes three to five days including cylinder and pipework changes.

Frequently Asked Questions

How much does British Gas charge for a new boiler in 2026? British Gas charges £2,800 to £4,500 for a standard combi boiler installation in 2026, depending on the model, output, and complexity. System boilers and conversions cost more. This is around 15 to 30 percent above the average quote from an independent Gas Safe engineer for equivalent work.

Does British Gas offer 0% finance on boilers? Yes. British Gas offers 0% APR finance for up to 3 years on selected models. This spreads the cost without increasing the total amount paid, subject to credit approval and the balance clearing within the interest-free period.

Can I get a free boiler through British Gas? If you receive qualifying means-tested benefits and your home is rated EPC band D to G, you may qualify for a fully funded boiler under ECO4, which British Gas delivers as an Ofgem-obligated supplier. This is separate from a standard paid installation. ECO4 closes 31 December 2026.

What warranty do you get with a British Gas boiler? A standard British Gas installation includes a 5-year warranty covering parts and labour. This requires annual servicing to remain valid. Extended warranties of up to 12 years are available at additional cost.

Can I use my own boiler with British Gas? No. British Gas will only install boilers from their approved range. If you want a specific model they do not stock, you will need to use an independent installer.

Is British Gas HomeCare worth it? HomeCare suits homeowners who want predictable costs, unlimited callouts, and automatic annual servicing in one monthly payment. It costs more than equivalent standalone cover. If you are comfortable booking and managing your own annual service and repairs, you can usually spend less by not adding HomeCare.

Does the Boiler Upgrade Scheme apply to British Gas boilers? The £7,500 Boiler Upgrade Scheme applies to heat pumps, not gas boilers. If you are replacing your gas system with a heat pump through British Gas, ask whether they are MCS-certified for BUS purposes. The scheme covers England and Wales only and is open until 2030.

Are British Gas engineers Gas Safe registered? Yes. All British Gas engineers are Gas Safe registered. British Gas is also a Which? Trusted Trader. You can verify any Gas Safe engineer's registration at gassaferegister.co.uk.

How InstantGrant Can Help

If you think you may qualify for ECO4, the Boiler Upgrade Scheme, or the Warm Homes: Local Grant — whether through British Gas or another installer — understanding your eligibility before you get a paid quote can save you significant money.

InstantGrant is an independent grant information and application-support service. We help UK homeowners identify which scheme applies to their situation, understand the eligibility criteria, and avoid the common mistakes that cost time and delay applications.

We are not British Gas, the UK government, Ofgem, or any funding body. We do not install boilers and we do not guarantee any grant outcome. What we do is help you approach the right scheme with the right information.

Check your eligibility at instantgrant.co.uk