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How Much Does A New Boiler Cost?

a technician assesses how much a new boiler will cost the owner

A new boiler typically costs £700 – £1,800

You could save £4,725 over a boiler’s lifetime

Fill in the form above for free boiler quotes

There's no escaping the fact that your property needs a boiler. Unless you’re going to take cold showers and wear a dozen cashmere jumpers at all times, it’s worth having a machine in your home that can provide heat, warmth, and general happiness.

But that doesn’t mean you need to sell a kidney to afford the privilege of central heating and hot water. With our help, you can neatly sidestep organ loss and financial ruin – and even make significant savings on your energy bills by getting the best boiler out there.

Think you've already got this boiler business sussed? Well then, the next step is to fill in this short form, and professional installers will send you bespoke quotes.

a person changes a boiler's temperature

So how much can you expect to pay? The answer is anywhere from £540 to more than £11,000, though typically, a new boiler will cost between £700 and £1,800.

For most people, installing a boiler will cost another £1,500 to £2,500, while the annual running costs will be between £550 and £1,500.

That means that over the course of your first year owning a boiler, it will generally cost you an average of £4,275.

There are many factors which contribute to the initial price. It depends on whether you need a new or replacement boiler, what kind of home you have, how much you can afford, and whether or not you have a gas connection.

You can get a good idea of how much your new boiler will cost by checking out the interactive graph below, which shows the typical prices associated with buying, installing, and running each of the most common boiler types.

Fill in this quick form, and start the process today.

What’s on this page?

Head straight to a specific section by clicking the links below.

New vs replacement boiler cost

Before you can know how much your next boiler will cost, you have to know whether it’s a new or replacement boiler.

What’s the difference? Well, if it’s a new boiler, that means this is the first time you’ve had a model of this kind, and you’ll therefore need all-new infrastructure installed along with the machine.

The surrounding pipes and pumps may well be different, the ground will need to be levelled if it hasn’t been already, and you might have to change the boiler’s location to place it closer to its fuel source.

If it’s a replacement boiler, it’s a different (and hopefully better) version of the same type of boiler, which means you’ll already have a lot of the necessary gear in place.

This reduces installation costs and makes for a smoother process, but might still cost you more in the long run if your type of boiler is less energy efficient than most.

Did You Know?

You can save more than £400 each year, just by switching your home’s energy supplier. If you’re looking to cut down your bills, this one’s a bit of a no-brainer.

That’s why we’ve partnered with Switchd. With four different price plans (including a free option), Switchd will find you cheaper, greener energy suppliers in no time.

Boiler cost calculator

It’s what everyone wants to know: how much will my new boiler cost? We’ve got you covered with this new boiler cost calculator, which uses the latest prices from engineers and vendors.

How much does a new boiler cost?

A new boiler can cost anywhere from £540 to more than £11,000. Its installation will typically be between £1,500 and £2,500, depending on how complex the process is and how expensive the parts are.

Going for a new boiler instead of a replacement will almost certainly cost you a pretty package. For instance, swapping out a gas combi for a system or conventional boiler can add as much as £2,000 to the installation cost.

Running costs – meaning the price of the fuel you need to keep your boiler running and producing energy – can depend on a number of factors.

On average, these costs range from £290 per year for a low-energy household to £909 per year for a high-energy home, according to Energy Saving Trust data – though this number can spiral to £1,500 if you get an oil or biomass boiler.

This also includes the standing charge, which is the flat-rate cost of accessing an energy supplier’s network.

How much does a replacement boiler cost?

Less, at first. Almost everything will be where it should be, and in most cases, you won’t need any additional infrastructure. This means that the boiler’s installation will cost less – maybe even thousands less, as seen above.

However, if you’re repeating the mistakes of the past and not getting the best model for your home, you could lose money in the long run. The amounts you lose every year by using an inefficient or unnecessarily powerful boiler will eventually catch up to you.

And if you’re wondering whether you could save some cash by removing the boiler yourself, don’t bother: it’s complicated, potentially hazardous, and above all, pointless.

Installation companies will almost always include the cost of removal in their overall price, and won’t reduce the price if you do it yourself. Spoilsports.

New vs replacement boiler cost: is it worth it?

In short: it depends. If you’re switching out an extremely inefficient boiler for one that will use energy the way it was meant to be used, then absolutely get a new boiler.

This does rely on you sticking around to reap the rewards of your initial investment, so make sure you’re ready to commit to your new boiler for years to come. It’s up to you whether you want to hold a commitment ceremony, but either way, be ready to take the plunge.

A replacement boiler is definitely the safer option, unless your old model was a biomass or oil boiler, both of which can cost you money that could be better spent on a new gas or electric model – if that’s possible for you.

Also, if you have a non-condensing boiler, you should replace it as soon as possible. A 2007 law means that every new boiler installed in the UK has to be a condensing boiler – and you should get on board with the trend.

Condensing boilers are typically at least 25% more efficient than non-condensing models, according to Which, because they have a Flue Gas Recovery System which captures and reuses waste gases.

How much do different types of boiler cost?

It’s a wide, wonderful world, full of different machines that spread warmth throughout your home – but which one matches your price bracket and fulfils your heating needs, and which one is full of hot air (but in a bad way)? Let’s compare some boiler prices and find out.

All exact prices come from (apart from the biomass boilers, which come from, and are accurate as of August 2019.

Boiler type
Typical cost
Combi (gas)
System (gas)
Conventional (gas)

Combi boiler price: £700

A combi boiler that will live up to your 15-year investment can set you back as much as £1,700, but if your home isn’t massive, there’s no need to break the bank.

The Baxi 224 Combi is the most cost-effective gas combi option, at £614, but there are many other bargains available on the market for less than £800.

System boiler cost: £900

System boilers tend to be more expensive than combi models, as there are more parts involved in the process. As well as the boiler, you’ll need a hot water cylinder – and once you add in the extra pipes involved, the cost rises even higher.

However, if your home has two bedrooms, two bathrooms, or both, and if you fancy using a model which is compatible with solar power (if you already have panels installed), a system boiler is the one for you.

a technician assesses how much a new boiler will cost the owner

Conventional boiler price: £900

An efficient conventional boiler can go for anything from £720 to more than £2,500, depending on how large your house is, and how many bathrooms will be used on any given day.

For instance, the £920 Baxi 600 Heat 30kW will cover all your heating needs, but you could spend £200 less than that if you’re replacing the existing conventional boiler in your one-bathroom home.

Gas boiler cost: £700

The range of prices is broader in this category, as it includes combi, system, and conventional boilers. You can easily spend anywhere from £570 to £2,700 on a gas boiler, but unless you live in Buckingham Palace (if you do: hello your majesty, thank you for your support), it’s probably not necessary to go to the high end of the scale.

The combi boiler will suit most people and most homes, which is why the price above is the same as the combi price.

It’s important to consider conventional and system boilers if your place already has the infrastructure for it – or if it’s larger than the average home – but otherwise, a combi is what will get you hot under the collar.

Take it from us, and take it from Birmingham University Professor Roy Harrison, who told The Eco Experts that gas boilers were generally the most effective.

“Probably the first consideration in selecting a boiler is its efficiency. Gas boilers emit less carbon dioxide per unit of hot water than oil or solid fuel boilers.”

– Professor Harrison

Now we’re (metaphorically) cooking with gas.

Oil boiler price: £1,800

Oil models are more expensive, less efficient, and worse for the environment than gas boilers – but could still have their place in areas which aren’t connected to the gas grid.

We spoke to Professor Harrison about oil boilers, and he explained that they're “less desirable on environmental grounds [than gas boilers], but may be the best choice where gas is unavailable.”

There’s also the potential to buy a budget model like the Grant Vortex Pro 15-21 – available for around £1,280 – if you have a smaller home, and want to save as much money as possible.

Electric boiler cost: £800

You can get an electric boiler for as little as £460 or so, but it probably won’t meet all of your heating needs – unless you live in an extremely small flat, in which case it’ll save you loads.

Beware the increase in running costs, though.

“[Having an electric boiler is] relatively expensive, as the cost per unit of energy is considerably higher than for gas or oil.”

– Professor Harrison

If you care about fighting climate change, an electric boiler can be helpful – as long as it’s powered in the right way. Otherwise, it can be worse than using a gas or oil boiler.

If the electricity which powers your boiler comes from wind, solar, or hydro power, then it won’t release harmful emissions. You’ll be able to rest easier at night, knowing you’re doing your part to prevent climate change.

But if – like most people – your electricity comes from gas or oil, an electric boiler will be even worse for the environment than simply using a boiler fuelled by gas or oil. This is because a longer pipeline process results in more power being lost along the way.

Biomass boiler cost: £10,000

You can get a biomass machine for around £5,000 if you’re willing to manually input the wood pellets every time you want heat, but otherwise, you’re looking at prices starting at £9,000 and going up to as much as £25,000.

These steep prices aren’t the only drawback associated with a biomass boiler. These machines leave a sizeable carbon footprint, often releasing more harmful emissions than other boilers, despite their eco-friendly appearance.

And if you’re thinking (understandably) that wood is a renewable, carbon-neutral power source – think again. According to HM Revenue and Customs, the UK imported 99.2% of its wood pellets in 2018.

This meant getting a record high of 7.8 million tonnes of wood pellets into the country.

All the transport required to move those millions of tonnes to the UK has a large impact on the climate – and that’s not even taking into account how much the pellets have to be processed when they’re being readied for export, which uses even more energy.

Biomass sounds eco-friendly, as does wood – but unfortunately, this is a false impression.

Central heating boiler price: £900

The average price here is slightly more expensive than gas or combi boilers, because we’ve taken more types of boilers into account.

Many different models – from combi to conventional, gas to biomass – can take care of your central heating requirements, so it’s up to you to work out which one suits your place.

The best central heating boiler at the moment, taking into account value for money, is the Viessmann Vitodens 050-W, which runs at an impressive 97.6% efficiency and is available for £742.

But if you don’t need a 29kW machine, this model would be an unnecessary expense. It all depends on how big your home is – a topic which we’ll get to in the next section.

And if you’re wondering about the difference in price between condensing and non-condensing boilers, you don’t need to. All new models have to be condensing – so really, a condensing boiler can cost any of the prices below.

How much will a boiler cost for your home?

Type of property
Boiler model
– Ideal Exclusive 24kW (£580)
– Vaillant ecoFIT pure 412 (£730)
Two-bedroom house
– Ideal Logic+ Combi 30kW (£830)
– Baxi 600 Heat 30kW (£920)
Three-bedroom house or larger
– Worcester Greenstar 8000 Life 35kW (£1,540)
– Viessmann Vitodens 200-W 35kW (£1,800)

Information updated in August 2019.

You’re not like everyone else. No-one is. Everyone and every home has needs which can be slotted into several different categories at once, but eventually, it’s up to you to make the right choice – and if you fill in this form, you can easily compare new boiler quotes.

The size of your new boiler will be influenced heavily by how many rooms, floors, and bathrooms your home has, whether or not you have a gas connection, and how likely it is that people will be using different bathrooms simultaneously.

You will, of course, also have to consider how much you can afford, and whether you want to go for a new or replacement boiler. So let’s break that down and compare boiler prices.

Flats: £580 – £1,300

“It is a truth universally acknowledged that a single bathroom in possession of an occupant must be in want of an effective boiler.” We’re pretty sure that was the Jane Austen quote. Either way, she wasn’t wrong – but everything comes at a price.

If you’re able to go for a combi boiler, you can get a bargain £580 model in the shape of an Ideal Exclusive 24kW, which should be able to heat even large flats.

Did the people before you install a conventional boiler? We’re sorry. The good news is that the Baxi 212 and the Vaillant ecoFIT pure 412 are champing at the bit to provide you with all the heat you need for around £730.

If you want to go with a system boiler, then you only need to spend around the same – £740 – on the Glow-worm Energy 12kW. For slightly bigger flats, consider going for the Ideal Logic+ 15kW, which can be found for an extremely reasonable £790.

If you insist on going for an oil boiler (despite our and Professor Harrison’s warnings), you can buy the Grant Vortex Pro 15-21 for around £1,300, which is cheap for an oil model.

Biomass boilers are simply not cost-effective for a flat, and electric boilers aren’t currently good enough at this price range to justify shelling out for them. When we compare boiler prices in their entirety, you’ll see just how high their costs are.

Two-bedroom houses: £830 – £1,690

While the leap from flat to house can be quite significant in terms of property prices, your boiler price won’t rise in quite the same exponential fashion.

If your two-bedroom house could benefit enormously from a combi boiler, then the Ideal Logic+ Combi 30kW (£830) is the one that you want.

If you need to go conventional because a past owner has installed one and made it the most affordable option, or if your home is unusually large for a two-bedroom place, you can buy a Baxi 600 Heat 30kW (£920) and ensure that your new boiler doesn’t cost you too much.

Likewise, if either historic decisions or other circumstances are forcing you in the direction of a system boiler, you can rest easy knowing that the Baxi Megaflo System (£1,040) won’t leave you destitute and unable to afford to turn it on.

Not convinced to ditch your plans for an oil boiler yet? The Worcester Greenstar Danesmoor Kitchen 25kW (£1,690) is your best course of action, though we would once again recommend avoiding the inefficient, environmentally harmful nature of oil boilers.

a woman installs a gas boiler

Three-bedroom houses or larger: £1,340 – £11,430

Now we’re getting into the higher echelons of boiler pricing. Then again, if you’re reading this, it’s not because you enjoy throwing money around – it’s because you need a boiler which can meet your vast needs.

If those needs can be met with a combi, then the Viessmann Vitodens 200-W 35kW (£1,800) is your best friend – unless you need a machine with more power, in which case you can get the (initially slightly cheaper) Worcester Greenstar 8000 Style 40kW (£1,630).

However, you might want a conventional boiler for this kind of house (if it’s not too expensive to get a new type of boiler), especially with the Worcester Greenstar 8000 Life 35kW (£1,540) available for a lower price, at the same output, and with the added bonus of storage tanks – if you have space for them, of course.

And for a conventional boiler with a higher output, go for the Vaillant ecoTEC plus 435 (£1,570).

A system boiler is even cheaper, if a model of that type is a possibility (or inevitability) for you and your home. The Worcester Greenstar 8000 Style 35kW (£1,450) is ready and waiting to heat an entire three-bedroom house, at your command.

We’ve finally reached the type of home which matches the output of a vaguely cost-effective electric boiler. If you were on tenterhooks waiting for this moment, hoping and praying that it would come, the EHC Fusion 36KW (£1,340) is the answer to your deepest desires.

For those of you who don’t have a gas connection, don’t mind polluting the environment with up to seven times more damaging nitrogen oxides, and have some extra cash to spend on your love for oil boilers, the Grant VortexBlue Internal 36 (£2,100) is available.

If you have a place with more than three bedrooms, and you live away from the gas grid, without the ability to get oil or gas-fuelled electricity to power your boiler – and preferably next to a ready supply of fresh wood – you might want to get a biomass boiler.

For those of you who require a mighty machine which can handily heat a whole house of hosts, look to the Grant Spira 36kW (£11,430).

How much can a new boiler save me?

Considering how much to spend on your new boiler is important, but remember to also take into account how much you could save in the long run.

After all, these machines generally last 15 years, and the right boiler can save you up to £315 per year, according to the Energy Saving Trust.

That means you could save £4,725 over 15 years.

The wrong boiler, on the other hand, will break down – as 18% of British homes unfortunately found out in 2016.

A repair costs £270 on average, according to uSwitch, but if your boiler is beyond repair, that can mean spending a large chunk of your savings on a boiler twice in quick succession.

There are also additional costs once you’ve bought the machine, but don’t worry about those.

The boiler installation cost calculator above will help you work out how much you’ll have to spend, laying out all the costs of buying and installing a boiler so you can make the best decision for you and your loved ones.

Take a look at: Boiler Repair Costs

Boiler installation cost

You’ve done the hard part. You’ve chosen the right kind of boiler for your home, both in terms of style and capacity; you’ve made sure to compare boiler prices, and to think about future savings; now, you’re ready to get your chosen model up and running.

But you have one more crucial question to answer: how much does installing a new boiler cost? After all, there’s no use buying a cost-effective boiler if you’ll need to remortgage your house in order to install it.

How much does a boiler installation cost?

Getting your boiler installed professionally (which you should definitely do) will generally cost between £1,700 and £3,300. This amount will depend on the type of boiler, and in some cases, how large and complex the model is.

Does the price depend on which type of boiler you’re getting?

Yes, absolutely. We contacted several boiler engineers, and asked how much it would cost to get different models installed – and the price gaps were significant.

Boiler type
Installation cost
Higher price for…
Combi gas
£1,700 – £2,000
Fixing any problems with the previous installation
System gas
Fixing any problems with the previous installation
Conventional gas
£2,000 – £2,500
New tanks as well as the boiler
£2,500 – £3,000
A model with more capacity
Oil combi
Using a chimney instead of a flue (£500-£1,000 more)
Oil conventional
Using a chimney instead of a flue (£500-£1,000 more)
£2,000 – £2,500
The installer providing all the extra gear

Information updated in August 2019.

Boiler running costs

After paying thousands to get a new boiler and have it installed, you’ll be relieved to hear that the great majority of your spending will be done, and you can go back to ignoring your boiler’s existence – apart from when you get your monthly bill.

Here's how much different boilers are likely to cost you after they're set up.

Gas boilers

This is what you can expect to pay per month if you have a gas boiler, based on government research from Ofgem on how much energy different homes use over a year, and Choose data that found the average cost of gas in the UK is 3.8p per kWh.

One bedroom flat: £25.33

Two-bedroom house: £38

Three-bedroom house: £45.92

Four-bedroom house: £53.83

Electric boilers

Here are the equivalent monthly bills if you have an electric boiler, based on Ofgem research and Choose data that shows the average household pays 14.37p per kWh for electricity, but uses far fewer kWh with an electric boiler.

One bedroom flat: £22.75

Two-bedroom house: £43.11

Three-bedroom house: £64.67

Four-bedroom house: £85.02

Oil boilers

If you’re using oil, it’ll be because you’re among the 2.7 million people in the UK not connected to gas – but there are cheaper options.

The eye-watering monthly figures below are drawn from data collected by The Consumer Council and the government’s Office for National Statistics (ONS), which found heating oil was 51.84p per litre in July 2019.

One bedroom flat: £63.68

Two-bedroom house: £97.80

Three-bedroom house: £131.98

Four-bedroom house: £166.10

Biomass boilers

Biomass boilers also cost a hefty amount to buy and install – and, unfortunately, to run.

The following monthly figures were calculated using market research into the price of wood pellets, and expert background analysis from Green Square Energy Centre which highlighted the costly nature of biomass boilers.

One bedroom flat: £40.83

Two-bedroom house: £81.66

Three-bedroom house: £122.49

Four-bedroom house: £163.32

Which boiler is the cheapest to buy, install, and run?

And so, we finally come to the most important question: how much, overall, will your new boiler cost? Hopefully by this point, you’ll know the boiler types that suit your home.

If, after absorbing all this new information, you want to take another look at our interactive cost calculator, then you should.

Remember: all of the figures quoted in the chart are averages, including the running costs, which are calculated for a three-bedroom house – the average size of a home in the UK, according to LABC.

Your next steps

You now have all the information you need to choose a boiler that matches you and your household’s needs. If you’d like to easily compare quotes, you can fill in this form and get an excellent deal.

And if you want to save the most money you can after installing your new boiler, remember to draught-proof your home and insulate your loft, walls, and windows beforehand. It’ll be worth it, we promise, and will help reduce your new boiler’s cost.

Upgrading your boiler is one of the best things you can do to save energy, according to the government – and it’s one which will generally pay off relatively quickly, especially compared to other home improvements such as double-glazing.

If you can't afford a new boiler right now, you may be able to get a free model through the government's Energy Companies Obligation scheme.

With the help we’ve provided here, we’re sure you’ll find your perfect boiler: that sweet spot-hitting machine that will cost you the least, and provide you with the most heat possible.

josh jackman
Josh Jackman Senior Writer

Josh has written about eco-friendly home improvements and climate change for the past three years. His work has featured on the front page of the Financial Times; he’s been interviewed by BBC Radio; and he was the resident expert in BT’s smart home tech initiative.

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