New Boiler Cost: How Much is a New Boiler in 2025?
- How much is a new boiler?
- Combi boiler cost
- System boiler cost
- Conventional boiler cost
- Cost of a new boiler: Breakdown by fuel type and models
- New gas boiler cost
- New oil boiler cost
- New electric boiler cost
- New boiler prices per manufacturer in the UK
- Labour cost of installing a new boiler
- How much does boiler conversion cost?
- Can government grants reduce new boiler costs?
- Frequently Asked Questions
- New boiler costs range from £1,600 to £6,000, including installation. The average new boiler cost is £3,800 (with installation).
- The cost of a new boiler depends on the boiler type, model, and manufacturer. Warranty length and your heating requirements will also affect prices.
- Grants such as the Boiler Upgrade Scheme and ECO4 could save you up to £5,000 towards a biomass boiler or a free boiler replacement for those eligible.
The average cost of a new boiler is a subject most UK homeowners would rather not think about. But let's face it: if your current boiler is letting you down, it’s probably time for a replacement.
As boilers age, their running costs tend to rise due to decreased efficiency over time. Upgrading to a new boiler can significantly boost efficiency and reduce energy expenses.
So, how much does a new boiler cost? and what can affect these prices? In this article, we’ll walk you through everything you need to know about your new boiler costs and help you save money along the way.
If you're ready to get started with your boiler replacement, you can search independently for a heating installer who meets your requirements. However, this can take hours, if not days.
Fortunately, there’s a way to avoid all this stress and save your precious time. Fill out our quick 30-second form, and we’ll provide you with up to 3 quotes from local Gas Safe registered boiler installers. To start comparing prices, click the button below for free, no-obligation quotes.
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How much is a new boiler?
A new boiler costs £2,300 on average before installation. The most common boiler type, a combi boiler, will cost £600 to £4,000, with a system boiler costing between £600 and £3,000. Conventional (or 'regular') boilers, although less common, can cost £600 to £3,500.
When estimating the cost of a new boiler, you also need to account for installation and labour fees. Typically, these will add £1,000 – £2,000 to your total. We've outlined some current market estimates for each boiler type below to give you an idea of prices.
| Type of boiler / Fuel source | Cost before installation | Cost including installation | Average total cost |
|---|---|---|---|
| Combi | £600 – £4,000 | £1,600 – £6,000 | £3,800 |
| System | £600 – £3,000 | £1,600 – £5,000 | £3,300 |
| Conventional | £600 – £3,500 | £1,600 – £5,500 | £3,550 |
| Electric | £500 – £3,000 | £1,500 – £3,000 | £3,250 |
| Biomass | £6,000 – £12,000 | £9,000 – £20,000 | £14,500 |
As you can see, boiler prices can vary greatly depending on the type of boiler you need. Within these types, other variables such as fuel choice, manufacturer and extra features can also influence overall costs. In the next section, we'll look at each boiler type and how these differences might affect your final total.
Combi boiler cost
Installing a new combi boiler costs between £1,600 and £6,000, with an average price of around £3,800. Combi boilers are the most common type of boiler, offering an all-in-one solution for providing heating and hot water.
Combi boilers are best for small and medium-sized homes with up to 2 bathrooms. As they are compact, they can usually be installed in a small space or cupboard, which is ideal for those with less space. This also makes a combi boiler installation quick and easy (reducing labour costs).
| Combi Boiler Prices Per House Size | |||
|---|---|---|---|
| Household size | Combi boiler size | Combi boiler unit cost | Average cost (including installation £1,500) |
| Small 1 – 2 bedroom |
18kW – 27kW | £600 – £1,700 | £2,650 |
| Medium 3 – 4 bedroom |
28kW – 34kW | £700 – £2,900 | £3,300 |
| Large 4+ bedrooms |
35kW – 43kW | £800 – £4,000 | £3,900 |
Prices include gas, oil, and LPG models. Installation is priced at £1,500 for demonstration purposes. All prices are estimates only.
Compare prices further with our guide to the best combi boilers in the UK.
Combi boilers offer many advantages for homeowners, but there are also some drawbacks you should consider. Here are some points to think about.
Pros of a combi boiler
- High energy efficiency of up to 94% means a combi boiler can save money on fuel, leading to reduced energy bills (up to £550 per year!).
- With all components in one unit, you save valuable space in your home.
- Hot water is provided on demand (no need to wait for it to warm up in a tank).
Cons of combi boilers
- They struggle to meet very high hot water demand, so they're most suitable for homes with less than 3 bathrooms.
- Combi boilers are only as strong as the mains water pressure in your area, so they won't help improve your water performance.
- As they don't have a backup hot water supply (like a system or conventional boiler), they can be a problem if you experience a breakdown or power outage.
If a combi boiler seems like a poor fit for your home – perhaps you have multiple bathrooms or a large family – a system boiler might be the better choice. They offer a greater hot water supply, but your overall central heating installation costs can increase due to additional parts.
System boiler cost
A new system boiler will cost between £1,600 to £5,000 to install. On average, you can expect to pay around £3,300. A system boiler is the perfect choice for homes with a higher hot water demand – this could mean 2 or more bathrooms, or large families who need to use multiple outlets at once.
A system boiler works alongside a hot water storage cylinder, meaning you have a large supply of hot water ready to go. However, you will need additional space to store this cylinder and the boiler unit.
| System Boiler Prices Per House Size | |||
|---|---|---|---|
| Household size | System boiler size | System boiler unit cost | Average cost (including installation £1,500) |
| Small 1 – 2 bedroom |
9kW – 18kW | £600 – £1,400 | £2,500 |
| Medium 3 – 4 bedroom |
18kW – 26kW | £1,000 – £2,000 | £3,000 |
| Large 4+ bedrooms |
26kW – 40kW | £1,400 – £3,000 | £3,700 |
Prices include gas, oil, and LPG models. Installation is priced at £1,500 for demonstration purposes. All prices are estimates only.
It should be noted that costs can vary during a system boiler installation due to the more complex nature of their setup. For example, a new hot water cylinder can cost £300 – £1,300, a fee you might not need to pay if you already have a cylinder in place. So if you're considering a conversion from a combi or regular boiler, it's best to get multiple quotes from installers to get an accurate idea of costs for your specific circumstances.
If you think a system boiler would be the best for your home, there are some pros and cons you should consider. Our list below should help you determine if this boiler type is right for you.
Pros of system boilers
- System boilers can provide hot water to multiple taps and showers simultaneously, making them ideal for larger homes or families.
- With instant access to hot water stored in a cylinder, they ensure a consistent supply.
- Great option to replace a conventional boiler, as they provide the same high levels of hot water without taking up space in the loft with additional tanks.
Cons of system boilers
- While more compact than conventional boilers, system boilers still require space for a hot water cylinder, typically in an airing cupboard – which means they're not always suitable for smaller homes.
- The hot water supply is determined by the size of the cylinder. Once it's empty, you will need to wait for it to refill (this can take from 20 to 60 minutes).
- System boilers can be more expensive to install compared to combi boilers due to the additional components and labour required.
Most homes are likely to be suitable for either a combi or a system boiler. However, in some older homes where conventional boilers are already installed, it can be a good option to simply replace the set-up you already have (as it can cut costs). Let’s take a closer look at conventional boiler costs.
Conventional boiler cost
A conventional boiler installation can cost between £1,600 and £5,500, with an average price of around £3,550. Conventional boilers are only recommended in situations where you are replacing an existing one. This is because they work alongside a hot water cylinder and a cold water feed tank (which is stored in the loft) – meaning they take up a lot of space, require many parts and take the longest to install.
A conventional boiler is great for properties that require a very high hot water demand, as they can provide a large storage of hot water ready for use. If you're replacing an existing conventional boiler, you could also benefit from more modern models’ efficiency levels.
| Conventional Boiler Prices Per House Size | |||
|---|---|---|---|
| Household size | Conventional boiler size | Conventional boiler unit cost | Average cost (including installation £1,500) |
| Small 1 – 2 bedroom |
9kW – 18kW | £600 – £1,600 | £2,600 |
| Medium 3 – 4 bedroom |
18kW – 26kW | £700 – £2,200 | £2,950 |
| Large 4+ bedrooms |
26kW – 40kW | £900 – £3,500 | £3,700 |
Prices include gas, oil, and LPG models. Installation is priced at £1,500 for demonstration purposes. All prices are estimates only.
If you're considering a conventional boiler replacement, there are a few things you should know. While there are advantages to this set up, there are some down sides. We've detailed some of these points below to help you decide.
Pros of conventional boilers
- Conventional boilers offer a large supply of hot water, meaning they can support the use of multiple outlets simultaneously – great for large families.
- If you have an existing conventional boiler, you can save money on an upgrade as you avoid expensive changes to pipework and parts.
- They can actually improve your water pressure as they are gravity-fed water from a cold water feed tank in the loft, rather than from the mains supply.
Cons of conventional boilers
- Conventional boilers need significant space for the boiler unit, hot water cylinder, and cold water storage tank. This can be problematic for homes with limited space.
- These boiler systems can be complicated and costly to install due to the multiple components and extensive pipework required.
- The more complex system with multiple components may require more frequent maintenance compared to simpler boiler types.
Whether you feel your home is better suited to a conventional upgrade or a brand new combi installation, it's important that you seek the advice of a professional installer.
While we can offer some price estimates, like those above, the actual cost of a new boiler will depend entirely on your needs. The best way to decide on a boiler and get the right deal for your budget is to compare quotes from several local installers.
Scrolling the web and submitting countless quote forms can be a draining task though – with some providers leaving you waiting weeks before replying. Well, there is a simpler way that can save you both time and money.
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Cost of a new boiler: Breakdown by fuel type and models
Installing a new boiler in your home typically costs between £1,600 and £6,000. One of the main reasons these prices vary so greatly is down to the fuel type you wish to use.
The most popular option in the UK is natural gas (as it's usually the cheapest fuel), but electric, oil, and LPG (Liquefied Petroleum Gas) are also great choices for some households.
In the table below, we've listed some estimated costs for boilers based on the fuel types.
| Boiler Cost Per Fuel Type | ||
|---|---|---|
| Fuel type | Boiler unit cost | Average cost (including installation £1,500) |
| Gas | £600 – £3,300 | £3,450 |
| Oil | £1,300 – £4,000 | £4,150 |
| LPG | £600 – £3,200 | £3,400 |
| Electric | £600 – £3,000 | £3,300 |
Installation is priced at £1,500 for demonstration purposes. All prices are estimates only.
From this price overview, we see that gas boilers are typically the cheapest option. However, for homes not connected to the national gas grid, LPG and electric boilers offer comparable prices. Oil boilers are also a good option for rural properties, and despite the higher upfront costs, they can have many advantages.
Let's explore each fuel type further to help you decide which is better suited for your circumstances.
New gas boiler cost
A gas boiler burns natural gas (from the national grid) to provide water for your central heating and hot water outlets. Gas-fuelled boilers are the most common in the UK because most homes are connected to the grid – making installation quick and easy. In addition, gas has historically always been the cheapest fuel option.
But how much does a new gas boiler cost? Current market prices estimate a new gas boiler costs between £600 and £3,300. However, in cases of complex fittings, the installation prices of the best gas boilers could add up to £2,000 to this total.
| New gas boiler cost | Estimated installation cost | Total |
|---|---|---|
| £600 – £3,300 | £1,000 – £2,000 | £1,600 – £5,300 |
If you're unsure of which boiler type you need, and how expensive the installation might be, we recommend comparing quotes from several installers. However, tracking down qualified installers you can trust can be a stressful process. Taking hours of time to read reviews and submit quote forms.
Thankfully, there's a simple way to avoid all this hassle.
Boiler Guide can connect you with up to 3 Gas Safe and OFTEC registered engineers for free.
Just fill in our 30-second form, and we'll do the rest. Click the button below to get started.
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New oil boiler cost
An oil boiler operates by burning a special type of heating oil (such as kerosene) to provide heating for the house. Oil boilers are very similar to gas boilers in the way they function. However, unlike gas (which is connected directly to the home through pipes), oil must be stored in large tanks (usually buried in the garden), which need to be refilled.
This process makes them the most popular heating alternative for homes that aren't connected to the gas network. Oil has also typically always been comparable in terms of fuel cost to gas (with only a 2-3 pence difference per unit), making oil a popular first choice for these rural homes.
Oil boiler prices start at £1,3000 and can reach as high as £4,000.The price depends on the unit size, manufacturer, and installation costs. In total, a new oil boiler replacement, including installation, could cost between £2,300 and £6,000.
| New oil boiler cost | Estimated installation cost | Total |
|---|---|---|
| £1,300 – £4,000 | £1,000 – £2,000 | £2,300 – £6,000 |
New electric boiler cost
An electric boiler uses the mains electrical supply to provide heating and domestic hot water. You can opt for an electric boiler whether you need a combi, system, or conventional model. However, compared to gas and oil brands, the manufacturer options are still quite limited in this area which can restrict your choice.
The average price of an electric boiler can range from £600 to £3,000 depending on the brand, boiler size, and complexity of the installation. Moreover, installation costs will likely fall between £1,000 to £2,000 depending on the location of your home and heating requirements.
| New electric boiler cost | Estimated installation cost | Total |
|---|---|---|
| £600 – £3,000 | £1,000 – £2,000 | £1,600 – £5,000 |
You should consider that while electric boilers can cost less to install, the price of electricity to run them can be much higher than other options. Electric boilers do, however, have a near 100% efficiency level, as every unit of energy they consume can be turned into heat (compared to gas, which is around 94%, for example).
We’ve created the table below to give you an idea of the running cost for each fuel type. It shows the typical average yearly use for a UK household, based on current energy price tariffs.
| Boiler type | Pence per kWh | Annual running cost |
|---|---|---|
| Gas | 6.34p | £729.10 |
| Oil | 6.8p | £782.00 |
| Electric | 24.86p | £2,858.90 |
All figures are estimates only and do not include additional standing charges. Based on the annual energy usage of a medium-sized UK home (11,500kWh), according to Ofgem's TDCVs and current price cap. (Jan. 2025)
Understanding which fuel and boiler type will suit your needs best can be difficult. Knowing the costs involved can help, but ensuring you have a boiler that is efficient and can meet your home’s hot water demands will help you save money.
To get the right boiler for your home, you should seek the advice of a qualified installer. By comparing prices from local companies, you can get the best advice and find cheap boilers that perfectly suit your budget.
Tracking down installers, who are trusted and highly rated though, can be like wading through an endless sea of noise. Filling in endless forms and scanning reviews hoping to find the good guys.
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New boiler prices per manufacturer in the UK
Boiler prices, as we've seen, can vary for many reasons – whether it's boiler type or choice of fuel. Another key factor that will impact your final total is the brand of boiler you choose. While your installer is likely to recommend the best boilers for you (based on their experiences, boiler cost and performance), it's good to know a little about your choices.
In the table below, we've listed the best boiler manufacturers with some typical market prices for each of their boiler types. This should give you a good idea of which brands are likely to cost the most.
| Manufacturer | Combi boiler price range | System boiler price range | Conventional boiler price range |
|---|---|---|---|
| Worcester Bosch | £600 – £3,800 | £1,150 – £3,400 | £600 – £3,500 |
| Vaillant | £900 – £2,300 | £1,150 – £1,900 | £990 – £2,000 |
| Viessmann | £1,050 – £2,200 | £1,050 – £2,000 | £1,170 – £1,700 |
| Ideal | £650 – £1,960 | £1,050 – £1,800 | £900 – £1,600 |
| Baxi | £600 – £1,500 | £900 – £1,500 | £900 – £1,550 |
All prices are estimates only.
It might seem odd that there are some large price differences between brands. For example, you can find combi boilers for as little as £600 or almost £4,000. Keep in mind that these prices include all fuel types – but there are other good reasons for such price variation.
Most manufacturers will offer a level of warranty cover or guarantee with their products – the longer the warranty, the more you are likely to pay. In addition, things like stainless steel parts or free system filters are often added perks you will see reflected in the cost.
Brand reputation is also a big factor, Worcester Bosch and Baxi are among the most well-recognised in the UK. Both have received numerous awards for 'best boiler' brands and 'Which?' recommendations. They are also likely to be recommended by your installer for their quick installation and easy repair access.
Labour cost of installing a new boiler
One of the largest factors to consider when getting a replacement boiler is the installation costs. Our research shows us that installation fees can add £1,000 – £2,000 on top of the cost of your boiler – which is definitely not something you want to overlook!
Labour costs can be from £300 – £500 per day, per installer depending on the provider you use. These rates can quickly add up if you require a complex or lengthy boiler replacement – for example, you want to remove an old conventional boiler system to upgrade to a combi. There are many parts to remove, and potentially replace, which can add time to the overall job.
You should also account for additional services and parts that your system might require. Some examples include:
- New hot water cylinder: £300 – £1,300
- System power flush: £450 – £800
- Magnetic filter: £100 – £300
- New boiler flue pipe: £300 – £600
- Wifi heating controller: £150 – £300
If an installer deems it necessary to upgrade or clean your system, these costs should be agreed upon with you in advance. However, it's worth budgeting for any unforeseen concerns that could arise during the installation (particularly if you have a very outdated system).
How much do radiators cost and should you replace them?
Radiators usually last between 15 – 20 years, however, modern radiators are up to 50% more efficient than older models, meaning it could reduce your energy bills if you update them.
If your radiators are over 15 years old and take a long time to heat up, or you notice any corrosion, rust, or leaks – it's time to upgrade! Doing this at the same time as a boiler replacement can help enhance the entire performance of your heating system.
Here are some estimated prices for radiator removal and fittings:
| Work type | Estimated price |
|---|---|
| Removal and replacement (per unit) | £80 – £200 |
| Relocate a radiator | £80 – £275 |
| Removing a radiator | £40 – £150 |
| Labour cost | £50 – £150 |
Please bear in mind that these costs are only estimates, and you should seek the advice of a professional to get a more precise quote.
How much does boiler conversion cost?
The cheapest option when it comes to boiler installations is to choose a like-for-like replacement. However, in some circumstances, you might want to convert your boiler to a new type. To help you get an idea of the costs involved, we've listed some prices below for typical conversions:
| Boiler Conversion Costs | ||
|---|---|---|
| From | To | Estimated cost |
| Conventional | Combi | £1,600 – £6,000 |
| Conventional | System | £1,600 – £6,000 |
| System | Combi | £1,600 – £5,500 |
| Combi | System | £1,600 – £6,500 |
If you have a specific requirement, for example, you want to relocate your boiler or switch to a different fuel, there may be many additional steps involved in your installation – such as removing tanks or fitting new pipework. These can all add time and parts to your job, meaning higher costs.
Can government grants reduce new boiler costs?
There are other ways to save money on a new heating system, though, such as through government grants like the Boiler Upgrade Scheme (BUS) or the ECO4. If you are eligible, you may receive funding of up to £5,000 through the BUS to support the installation of a biomass boiler.
The ECO4 scheme also enables those on low incomes (who meet the right criteria) to access free energy efficiency upgrades to their homes via local authorities or directly from large energy suppliers. This can include a free boiler replacement for pensioners, or boiler repairs.
To find out more about who qualifies for a boiler grant, read our guides or visit the official government and Ofgem websites.
To get best prepared for your new boiler replacement, it's important to consult a qualified boiler installer – that’s Gas Safe registered for gas, of OFTEC engineers for oil boilers.
Speaking with several installers can help you finalise costs and give you the opportunity to compare quotes, making sure you find the best deal for your budget. In addition, seeking these quotes from local installers can help save you money, as they often charge lower rates than national companies.
So how do you begin to find an installer you can trust? You could search the internet, scroll through reviews and spend hours clicking and comparing. However, there is a much quicker (more beneficial) way!
Filling in our one simple form, you can spend just 30-seconds and we'll do the rest. We'll connect you with up to 3 qualified local installers who can provide you with free quotes to compare.
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Frequently Asked Questions
How much is a new boiler on average in the UK?
The average cost of a new boiler in the UK is usually between £600 and £4,000. This is the cost for a new standalone boiler, but prices can go up to £6,000 with the installation costs included.
How much does replacing a boiler cost?
Replacing your boiler with a new one costs between £1,600 and £6,000 on average. The final cost will depend on your local installer’s labour rates, the complexity of the job, and how many hours it takes.
Is it worth buying a new gas boiler?
It is worth getting a new gas boiler if your boiler is over 10 years old. This is because older boilers aren’t as efficient as newer ones, which costs you more in heating bills. If your boiler is also regularly breaking down or you notice any weird smells or noises, these are also signs that you should call a heating engineer and possibly get a new boiler.
Is it cheaper to get a new boiler?
Yes and no. In case your existing boiler is old and inefficient, getting a new boiler will be cheaper than maintaining an older one. Yet, if your boiler is comparably new, repairing and maintaining it is a better option to save money.
What are the running costs of a boiler?
A boiler’s running costs largely depend on its type, fuel source, and efficiency. For a new gas combi boiler, annual running costs can be around £800, but this will fluctuate depending on the current price of gas.