A new boiler in the UK typically costs £1,700 to £6,000+ including installation in 2026, depending on the boiler type, brand, installation complexity and what is already in your home.
For most homes, a straightforward combi boiler replacement is usually the cheapest option. A more involved job, such as converting from a regular boiler to a combi, moving the boiler, replacing an old back boiler, changing the flue route or upgrading pipework, can push the total much higher.
Based on 2,000 Heatable quotes generated between January and May 2026, the median quoted price for a standard combi boiler replacement was £2,300. Most standard combi swaps in this sample were quoted between £2,150 and £3,000, depending on boiler model, warranty length, controls and installation requirements.
For a useful external benchmark, UK Government domestic retrofit cost assumptions have previously estimated replacement gas boiler costs at around £1,600 to £4,000, and replacement oil boiler costs at around £2,500 to £5,000. Those figures are helpful, but they do not automatically include every possible extra, such as thermostatic radiator valves, smart controls, a new cylinder, upgraded pipework or unusual flue work.
So no, the answer is not just “about two grand, mate”. That might be true for a simple swap. It might also be a quote that has quietly forgotten half the job.
This guide breaks down what a new boiler actually costs, what Heatable customers are typically quoted, what pushes the price up, which extras are worth paying for, and how to compare quotes without being caught out by a cheap-looking number that grows later.
If you’re already at the “just tell me what mine will cost” stage, fair enough. Get a fixed quote from Heatable in minutes - no sales waffle, no awkward home visit, no bloke named Darren sucking air through his teeth in your kitchen.
New boiler costs at a glance
Installation type | Typical installed cost |
Like-for-like combi boiler swap | £1,800-£3,500 |
Premium combi boiler swap | £3,000-£4,500 |
Regular/system to combi conversion | £3,000-£5,700 |
Back boiler to combi conversion | £3,500-£6,000 |
System boiler replacement | £1,800-£3,500 |
Conventional boiler replacement | £1,800-£3,000 |
Oil boiler replacement | £4,500-£5,500 |
Electric boiler installation | £1,700-£4,500 |
Biomass boiler installation | £10,000-£18,000 |
🔑 Key points:
A typical new boiler installation costs around £2,500 to £4,000.
The wider real-world installed range is roughly £1,700 to £6,000+.
A standard combi boiler swap is usually the cheapest and quickest job.
System and conventional boilers often cost more if cylinders, tanks or pipework are involved.
Oil boilers are usually pricier than standard gas boiler replacements.
Moving a boiler or converting from one boiler type to another can add hundreds or even thousands.
Some households may qualify for support through ECO4 or low-carbon heating grants, but eligibility is limited.
The only reliable way to know your actual cost is to get an itemised quote based on your home, current system and chosen boiler.
Estimate your new boiler cost
Use the guide below to estimate where your installation is likely to sit before getting a fixed quote.
Your situation | Likely cost level | Typical installed cost |
Replacing a combi boiler in the same place | Lowest | £1,800–£3,500 |
Replacing a premium combi boiler | Low to medium | £3,000–£4,500 |
Replacing a system boiler | Medium | £1,800–£3,500 |
Back boiler to combi conversion | Medium | £3,500–£6,000 |
Converting regular/system to combi | Medium to high | £3,000–£5,700 |
Conventional boiler replacement | High | £1,800–£3,000 |
Oil boiler replacement | Adds complexity | £4,500–£5,500 |
Electric boiler installation | Higher | £1,700–£4,500 |
Biomass boiler installation | Highest | £10,000–£18,000 |
Quick boiler cost estimator
Answer these questions to estimate your likely cost band:
1. What type of boiler do you currently have?
Combi boiler: usually cheapest if replacing like-for-like
System boiler: medium cost, especially if the cylinder is staying
Regular/conventional boiler: medium cost, higher if converting to combi
Back boiler: usually higher because removal is more complex
Oil boiler: usually higher than standard gas replacement
Not sure: get a fixed quote or send photos of your current setup
2. Are you keeping the boiler in the same place?
Yes: usually cheaper
No: expect extra labour, pipework and flue costs
3. How many bathrooms do you have?
1 bathroom: usually suitable for a combi boiler
2 bathrooms: combi or system boiler, depending on hot water demand
3+ bathrooms: a system boiler often makes more sense
4. How complex is the installation?
Simple combi swap: lowest cost
Conversion: higher cost
Boiler move: higher cost
Back boiler removal: higher cost
Major pipework or flue changes: higher cost
Example new boiler cost estimates
Example home | Likely installation | Estimated cost |
2-bed flat, old combi, same location | Like-for-like combi swap | £1,800-£3,000 |
3-bed semi, combi replacement | Mid-range combi swap | £2,300 - £3,500 |
4-bed detached, high hot water demand | Larger combi or system boiler | £2,700-£5,000+ |
Older house with tanks in loft | Regular to combi conversion | £3,000-£5,700 |
Fireplace back boiler | Back boiler to combi conversion | £3,500-£6,000 |
Rural off-grid home | Oil boiler replacement | £4,500-£5,500 |
These are guide prices, not fixed quotes. Your actual price depends on your home, current system, boiler choice, flue route, pipework and installation requirements.
Real Heatable quote data: what new boilers typically cost
To make this guide more useful, we reviewed Heatable boiler quote data from the last 12 months across common replacement jobs.
The figures below show median quoted prices for typical installations. They are guide prices, not fixed quotes, because your final price depends on your current boiler, property, pipework, flue route, boiler choice and any extra installation work required.
Installation type | Typical Heatable installed cost | Typical scenario |
Like-for-like combi swap | £1,800-£3,500 | New combi fitted in the same location |
Premium combi swap | £3,000-£4,500 | Higher-spec boiler, longer warranty or upgraded controls |
Regular/system to combi conversion | £3,000-£5,700 | Cylinder/tank removal or heating system changes |
Back boiler to combi conversion | £3,500-£6,000 | Old back boiler replaced with a modern combi |
System boiler replacement | £1,800-£3,500 | System boiler replaced, usually with cylinder retained |
Conventional boiler replacement | £1,800-£3,000 | Heat-only boiler replacement in a traditional system |
By “like-for-like combi swap”, we mean a standard combi boiler replacement where the new boiler is installed in the same location and no major conversion, relocation or non-standard pipework is required.
The “common quote range” reflects typical quotes in our sample and excludes unusual installations where substantial extra work was required.
What the data shows
The cheapest quotes were usually simple combi boiler replacements where the new boiler was fitted in the same location and the existing pipework, flue route and controls were suitable.
The highest quotes usually involved one or more of the following:
boiler conversion
back boiler removal
boiler relocation
vertical flue work
upgraded pipework
larger property size
premium boiler model
longer warranty
additional controls or radiators
This is why two homes can both be looking for a “new boiler”, but receive very different prices. The boiler itself is only part of the job.
Important note on this data ‼️
Heatable quote data reflects quotes generated through our online boiler journey. It should be treated as a real-world pricing benchmark, not a guaranteed price for every property.
Your fixed price may be lower or higher depending on your home, current heating system, selected boiler, installation requirements and any non-standard work.
👷♂️ Reviewed by heating experts and pricing estimators
This new boiler cost guide is technically reviewed by Heatable heating specialists and pricing reviewed by Heatable estimators.
Prices are checked against:
real Heatable quote data
current boiler supply costs
typical UK labour ranges
manufacturer guidance
public sources including GOV.UK, Ofgem, Energy Saving Trust and UK Government domestic retrofit cost assumptions
Prices are guide ranges only. Your actual quote may be lower or higher depending on your property, current boiler, pipework, flue position, heating controls and any extra work required.
Factors Affecting New Boiler Cost in 2026
The cost of a new boiler isn’t a one-size-fits-all deal - it’s more like ordering a coffee with all the extras, where every choice bumps up the price. Here’s what can nudge your bill up (or down):
Boiler Type: Combi boilers are usually the cheapest to install since they’re compact and don’t need extra tanks. Biomass boilers, on the other hand, are the priciest due to their complexity and size.
Brand: Big names like Worcester Bosch or Viessmann cost more but come with better reliability, efficiency, and longer guarantees - think of it as paying for peace of mind.
Output (kW): Bigger homes with more bedrooms and bathrooms need a boiler with a higher output, which means a higher price tag.
Installation Complexity: A simple combi swap might take a day, but converting a regular boiler to a combi or moving the boiler to a new spot can add days of labour and extra pipework.
Location: Labour costs vary across the UK. In London, you’ll pay more than in the Midlands or rural areas - sometimes a lot more.
Extras: Fancy a smart thermostat to control your heating from your phone? Or a longer guarantee for added security? These add-ons can increase your total.
Condition of Your Current System: If your existing pipework is ancient (think lead pipes or ones that predate the internet), you’ll need upgrades, which can add to the cost.
🎥 Prefer video? Check out our YouTube video explaining the average new boiler costs below:
Average new boiler costs by type
Different boiler types come with different installation costs. A like-for-like combi swap is usually the simplest job. System, conventional, oil, electric and biomass boilers can cost more because they may involve cylinders, tanks, extra controls, storage space or specialist installation work.
1. Combi boiler replacement cost
A combi boiler replacement usually costs £1,800 to £4,500 including installation.
A straightforward like-for-like combi swap, where the new boiler goes in the same place and the existing system is in good condition, usually costs £1,800 to £3,500.
A premium combi boiler swap usually costs £3,000 to £4,500, depending on the boiler model, warranty, controls and installation requirements.
Item | Guide cost |
Like-for-like combi boiler swap | £1,800-£3,500 |
Premium combi boiler swap | £3,000-£4,500 |
Heatable median standard combi quote | £2,300 |
Typical installation time | 1 day |
Best for | Flats and small to medium homes |
Combi boilers are the are the UK’s most popular boiler type because they provide heating and hot water from one compact unit. They do not need a separate hot water cylinder or cold water tank, which makes them ideal for homes where space is limited.
A combi boiler is usually best for:
flats
small homes
medium homes
homes with one bathroom
homes where space is limited
households that want hot water on demand
Why choose a combi boiler?
No separate cylinder or tank required
Usually cheaper to install like-for-like
Compact and space-saving
Hot water on demand
Often installed in a day when it is a simple swap
Watch out for
A combi boiler may not be the best option if you have a large home with several bathrooms, low mains water pressure, or lots of people using hot water at once.
If you are converting from a regular or system boiler to a combi, the job will usually cost more because old tanks or cylinders may need removing and pipework may need changing.
Curious to know which boiler brand performed worst? Find out in our report on the worst boilers.
2. System boiler replacement cost
A system boiler replacement usually costs £1,800 to £3,500 including installation.
System boilers are commonly used in larger homes with higher hot water demand. They work with a separate hot water cylinder, allowing multiple taps or showers to be used more comfortably than with many combi boilers.
Item | Guide cost |
System boiler replacement | £1,800-£3,500 |
Typical installation time | 1-2 days |
Best for | Larger homes with higher hot water use |
System boilers are a good choice for homes with two or more bathrooms, especially where several people may need hot water at the same time.
Why choose a system boiler?
Better for homes with high hot water demand
Works with a hot water cylinder
Suitable for larger families
Can work well with solar thermal systems
Usually simpler than a full conventional boiler setup
Watch out for
System boilers need space for a hot water cylinder. If you do not already have a cylinder, or your current one needs replacing, the installation cost will increase.
Watch Out For:
Needs space for a cylinder, so not ideal for small flats or homes with limited storage.
More expensive than a combi if you’re starting from scratch, especially if you need a new cylinder.
Installation can take longer - up to 2 days if the pipework needs adjusting.
3. Conventional boiler replacement cost
A conventional boiler replacement usually costs £1,800 to £3,000 including installation.
Conventional boilers, also called regular or heat-only boilers, are often found in older and larger homes. They usually work with both a hot water cylinder and a cold water storage tank.
Item | Guide cost |
Conventional boiler replacement | £1,800-£3,000 |
Typical installation time | 1-2 days |
Best for | Larger older homes with traditional heating systems |
A conventional boiler can make sense if your home already has a traditional heating system and the existing tanks and cylinder are in good condition.
Why choose a conventional boiler?
Suitable for larger homes
Good for high hot water demand
Can work well in homes with lower mains pressure
Often the simplest replacement route for older systems
Watch out for
Conventional boilers take up more space because they need a cylinder and tank. If your tanks, cylinder or pipework need replacing, the cost can rise.
4. Back boiler replacement cost
A back boiler to combi conversion usually costs £3,500 to £6,000.
Back boilers are older heating systems usually hidden behind a fireplace. They are now outdated, inefficient compared with modern boilers, and more awkward to replace than a standard wall-mounted boiler.
Item | Guide cost |
Back boiler to combi conversion | £3,500-£6,000 |
Heatable back boiler conversion fee | £395 |
Typical installation time | 2 days |
Best replacement option | Usually a modern combi boiler |
Replacing a back boiler is more expensive because the old unit needs removing, pipework may need rerouting, and the new boiler is usually installed in a different location.
With Heatable, back boiler conversions include a fixed £395 conversion fee, helping keep this part of the quote transparent.
Other installers may charge more because these jobs are more awkward, more time-consuming and less predictable than a simple boiler swap.
5. Electric boiler costs
An electric boiler usually costs £1,700 to £4,500 including installation.
Electric boilers can be useful for smaller homes, flats or properties without a gas supply. They are usually simpler to install because there is no gas pipe or flue, but they can be more expensive to run because electricity usually costs more per unit than gas.
Item | Guide cost |
Electric boiler installation | £1,700-£4,500 |
Best for | Small homes, flats, no-gas properties |
Main drawback | Higher running costs |
Electric boilers are usually not ideal for large homes with high heating and hot water demand unless the property is very well insulated and designed around electric heating.
6. Oil boiler replacement cost
An oil boiler replacement usually costs £4,500 to £5,500 including installation.
Oil boilers are commonly used in rural homes that are not connected to the mains gas grid. They work similarly to gas boilers, but use heating oil stored in a tank on your property.
Item | Guide cost |
Oil boiler replacement | £4,500-£5,500 |
Best for | Rural homes off the gas grid |
Extra consideration | Oil tank condition and location |
Oil boilers can be more expensive than gas boiler replacements because the boiler itself, fuel storage, flue requirements and installation work can be more involved.
If your oil tank also needs replacing, that can add significantly to the total cost.
Watch out for
Oil prices can fluctuate, which affects running costs. If you are off the gas grid, it is also worth comparing oil boiler replacement with heat pumps, especially where grants are available.
6. Biomass boiler cost
A biomass boiler usually costs £10,000 to £18,000 including installation.
Biomass boilers burn wood pellets, chips or logs to provide heating and hot water. They are most suited to larger off-grid homes with enough space for the boiler and fuel storage.
Item | Guide cost |
Biomass boiler installation | £10,000-£18,000 |
Best for | Larger off-grid homes |
Main drawback | High upfront cost and fuel storage needs |
Some biomass boiler installations may qualify for government support, but eligibility rules are specific. Always check current Boiler Upgrade Scheme criteria before assuming you can get a grant.
Please note: ultimately, an accurate boiler installation cost depends on a variety of factors personal to your situation.
New boiler cost by brand
Different brands come with different price tags, depending on their reputation, build quality, and guarantee length.
Here’s what you’ll pay for some of the UK’s most popular boiler brands in 2026:
Boiler Brand: | Combi Boiler Price Range | System Boiler Price Range | Conventional Boiler Price Range |
£1,500 - £3,500 | £1,200 - £2,600 | £1,200 - £2,600 | |
£1,500 - £3,700 | £1,200 - £2,200 | £1,200 - £2,200 | |
£1,500- £3,500 | £2,000 - £2,500 | £2,000 - £2,500 | |
£1,300 - £2,500 | £1,300 - £2,500 | £1,300 - £2,500 | |
£1,000 - £2,400 | £1,000 - £2,400 | £1,000 - £2,400 | |
£1,300 - £2,500 | £1,300 - £2,500 | £1,300 - £2,500 |
Premium brands such as Worcester Bosch, Vaillant and Viessmann usually cost more upfront, but often come with strong warranties, good parts availability and a long track record.
Brands such as Ideal, Alpha and Baxi can be more affordable while still offering good performance when fitted correctly.
The best boiler brand for your home depends on your budget, property size, hot water demand, warranty preference and installer recommendation.
Want more on reliability? Check out our guide to the most reliable combi boilers in 2026 to see which brands stand the test of time.
British Gas vs BOXT vs Heatable vs local installer
New boiler prices vary between providers. The cheapest quote is not automatically the best quote, and the most expensive quote is not automatically the safest.
Provider type | Pricing style | Strength | Watch out for |
British Gas | National provider pricing | Huge brand, national coverage, familiar name | May be more expensive depending on the job |
BOXT | Online fixed quote model | Fast digital journey, clear quoting | May be less flexible for unusual installations |
Local installer | Variable quote model | Can be competitive, local knowledge | Quality, availability and aftercare vary |
Heatable | Online fixed quote model | Fixed pricing, national installation, strong warranties | Not always the cheapest possible quote |
The fair way to compare quotes is to check the full scope, not just the headline number.
A proper comparison should include:
same boiler model or equivalent model
same warranty length
flue kit
magnetic filter
controls
chemical flush or system cleaning
gas pipe upgrade if required
VAT
Gas Safe registration
waste removal
finance cost if paying monthly
A cheaper quote is only cheaper if it includes the same job.
What should be included in a new boiler quote?
A good new boiler quote should clearly show what is included, what is optional and what could cost extra.
Before accepting a quote, check whether it includes:
Quote item | Why it matters |
Boiler make and model | Lets you compare like-for-like |
Boiler output in kW | Makes sure the boiler suits your home |
Warranty length | Longer cover can protect you from future repair costs |
Labour | Installation cost should be included, not hidden |
VAT | Avoids a nasty surprise later |
Gas Safe registration | Required for legal, safe gas boiler installation |
Flue kit | Needed to safely remove exhaust gases |
Magnetic filter | Helps protect the boiler from sludge and debris |
Heating controls | Affects comfort, efficiency and usability |
Chemical flush or system cleaning | Helps protect the new boiler |
Gas pipe upgrade | May be needed for modern boilers |
Waste removal | Old boiler and parts should be disposed of properly |
Finance details | Shows the true total cost if paying monthly |
If a quote does not clearly list these items, ask before you accept it.
Heatable quote inclusions
A Heatable quote is designed to show the full installed cost clearly, not just the boiler supply price.
Depending on your selected boiler and installation type, your quote may include:
Gas Safe installation
boiler supply
standard labour
standard flue kit
magnetic boiler filter
chemical flush
standard gas pipe upgrade where required
basic heating controls
warranty registration
VAT
removal of your old boiler
fixed online price
option to spread the cost with finance, subject to approval
Some non-standard work may cost more. This can include unusual pipework, major relocation, vertical flues, scaffolding, lead pipework, microbore pipework, unsafe existing systems or anything outside a standard installation.
If extra work is needed, this should be made clear before installation proceeds.
How much will a new boiler save you?
Old boilers are like leaky buckets - money just pours out in wasted energy. Upgrading to a modern A-rated boiler can save you a bundle. According to the Energy Saving Trust, here’s what you could save annually by replacing an old G-rated boiler (less than 70% efficient):
Old Boiler Rating: | Bungalow | Detached House | Flat (Mid-Floor) | Semi-Detached House | Mid Terrace House |
G (<70% efficient) | £345 | £640 | £150 | £385 | £320 |
F (70-74% efficient) | £245 | £460 | £100 | £275 | £225 |
E (74-78% efficient) | £195 | £370 | £80 | £220 | £180 |
D (78-82% efficient) | £150 | £295 | £60 | £170 | £140 |
That’s less money down the drain and more for your holiday fund - or at least a decent cuppa. Plus, a new boiler reduces your carbon footprint, which is a win for the planet (and your conscience).
For every £10 you spend on an old G-rated boiler, up to £4 is wasted - new boilers cut that waste dramatically.
If you’re curious about the greenest options, biomass boilers or electric boilers paired with renewable energy (like solar panels) are worth a look. They’ll save you even more in the long run, especially with rising energy prices.
Is it cheaper to repair or replace a boiler?
It is usually cheaper to repair a boiler if the fault is minor and the boiler is otherwise in good condition.
Replacement may be the better option if:
your boiler is more than 10-15 years old
repair costs are high
parts are hard to find
the boiler keeps breaking down
it is inefficient
it is unsafe
you are planning to renovate or sell
you want a longer warranty
As a rough rule, if a repair costs several hundred pounds and the boiler is old, inefficient or unreliable, it is worth comparing the repair cost with the cost of replacement.
Can you pay monthly for a new boiler?
Yes, many installers offer boiler finance, allowing you to spread the cost of a new boiler over monthly payments.
With Heatable, you can choose flexible payment options, including interest-free finance on selected installations, subject to eligibility and approval.
When comparing finance options, check:
total amount repayable
interest rate
monthly payment
deposit
term length
early repayment rules
whether the boiler price is higher when financed
A low monthly payment can look attractive, but always check the total cost over the full term.
New boiler grants in 2026
Boilers aren’t cheap, but you might qualify for financial help to ease the burden. Here’s what’s available in 2026:
Some households may qualify for help with heating upgrades, but grant eligibility is specific. There is no universal “free boiler for everyone” scheme.
ECO4
ECO4 is designed to improve the energy efficiency of low-income and fuel-poor households. It can support measures such as insulation, heating upgrades and other efficiency improvements.
ECO4 has been extended until 31 December 2026.
Eligibility usually depends on factors such as income, benefits, property energy performance and supplier criteria. If you own your home, it usually needs an energy efficiency rating of D, E, F or G. If you rent privately, the property usually needs an E, F or G rating and you need the owner’s permission.
Boiler Upgrade Scheme
The Boiler Upgrade Scheme supports low-carbon heating in England and Wales. It does not provide a grant for a new gas boiler.
Current Boiler Upgrade Scheme grants include:
£7,500 towards an air source heat pump
£7,500 towards a ground source heat pump
£5,000 towards a biomass boiler
£2,500 towards an air-to-air heat pump
Always check current GOV.UK and Ofgem guidance before making a decision, as grant rules and funding levels can change.
Boiler Replacement Scheme in Northern Ireland
The old Northern Ireland Boiler Replacement Scheme, which offered support for replacing boilers over 15 years old, closed in September 2023.
Northern Ireland households may still be able to access other energy-efficiency support, but you should check current Northern Ireland Housing Executive or Department for Communities guidance before relying on any grant.
Compare us against the competition:
Boiler Replacement Scheme (Northern Ireland):
Exclusive to Northern Ireland, this scheme offers up to £1,000 towards a new boiler for eligible households. You’ll need to meet specific criteria, such as income level, property type, or energy efficiency rating.
For example, homes with old, inefficient boilers (G-rated or below) are often prioritised. Contact your local authority or the Northern Ireland Housing Executive for details on how to apply.
Boiler Upgrade Scheme (BUS):
This one’s for eco-conscious homeowners switching from fossil fuel systems (like gas or oil) to heat pumps or biomass boilers. Grants include:
£7,500 for air source heat pumps or ground source heat pumps.
£5,000 for biomass boilers.
The BUS has £450 million in funding as part of a £3.9 billion government push to decarbonise heating and buildings, announced in 2026.
Note: this doesn’t apply to gas boilers, but it’s worth considering if you’re exploring greener options like a heat pump for your home. Heat pumps are more expensive upfront (starting at £8,000 including installation), but the grant and lower running costs can make them a smart investment.
How to reduce the cost of a new boiler
You can reduce the cost of a new boiler by keeping the job simple and making sure quotes are genuinely comparable.
Ways to keep costs under control:
keep the boiler in the same location if possible
choose a boiler that suits your home, not the most expensive model available
avoid unnecessary conversions
compare itemised quotes
check whether filters, controls and system cleaning are included
ask about finance options
check grant eligibility
avoid quotes that look suspiciously cheap
book before your boiler completely fails, if possible
The worst time to buy a boiler is usually when your old one has died in winter and you need an emergency replacement. If your boiler is clearly on the way out, planning early gives you more control.
Which boiler is right for your home?
The right boiler depends on your home, hot water demand, current system and budget.
Choose a combi boiler if:
you have a flat or small to medium home
you have one bathroom
you want hot water on demand
you want to save space
you do not want a cylinder or tank
Typical cost: £1,800-£4,500
Choose a system boiler if:
you have a larger home
you have two or more bathrooms
several people use hot water at once
you already have or want a hot water cylinder
Typical cost: £1,800-£3,500
Choose a conventional boiler if:
you have an older home
you already have a traditional heating system
you have low water pressure
you have high hot water demand
Typical cost: £1,800-£3,000
Choose an oil boiler if:
you are off the gas grid
you already have an oil heating system
a heat pump is not suitable or affordable
Typical cost: £4,500-£5,500
Choose an electric boiler if:
you have no gas supply
you have a small, well-insulated property
you want simpler installation
Typical cost: £1,700-£4,500
Methodology: how we calculate new boiler costs
The prices in this guide are based on a combination of Heatable quote data, internal installed cost guidance, supplier pricing, typical UK installation labour, manufacturer information, public energy sources and common boiler replacement scenarios.
For Heatable quote data, we reviewed 2,000 quotes generated between January and May 2026, plus wider quote data across common replacement jobs.
We group costs by:
boiler type
installation type
property size
number of bathrooms
boiler brand
conversion type
relocation requirement
standard vs non-standard installation
selected controls
warranty length
We use median quote values where possible because they are less distorted by unusually cheap or unusually complex jobs than simple averages.
Guide ranges are then sense-checked against:
current boiler supply costs
typical UK labour rates
manufacturer installation guidance
public domestic retrofit cost assumptions
energy and heating industry sources
This guide is reviewed regularly, but it is not a substitute for a fixed quote. Your actual price depends on your home, existing system, chosen boiler, pipework, flue, location and any required extras.
Next Steps For Your New Boiler Journey:
When planning to install a new boiler for your home, there are several important factors to consider. Make sure to refer to the following guides to help you make informed decisions:
To dive deeper into these topics, head over to our advice section or check out our YouTube channel to learn more.
Get A New Boiler Quote Today
If you’re aiming to get the best deal on a new boiler, consider getting your boiler installation with us. Here’s why:
Gas Safe installation within 24 hours.
Thousands of satisfied customers with an average score of 4.9 on Trustpilot, surpassing the market leader.
Which? Trusted Trader: Heatable is proudly recognised as a Which? Trusted Trader.
Price match guarantee: We will match any like-for-like cheaper quote.
Flexible payment options, including interest-free finance*.
Up to a 12-year guarantee on selected boilers.
Fixed price guarantee: No hidden costs.
Save your quote and decide later.
Get an instant fixed price on a new boiler here.
To learn more about boilers, visit our advice section, check out our YouTube channel, or read customer testimonials here.
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