- How much does a new boiler cost?
- Boiler cost calculator
- New boiler cost based on property size
- Are there any government grants for boilers?
- What factors affect the cost of a boiler?
- How much money will you save by switching to a new boiler?
- What are the average running costs of a boiler?
- What are the maintenance costs of a boiler?
- Next steps
A new boiler typically costs £4,000
You could save at least £200 per year by getting a new boiler
Fill in the form above for new boiler quotes
Most houses have a boiler and unless youre going to switch from central heating to a cold existence, youll need to replace it every decade or so.
But in the midst of a recession and an energy crisis, you need an excellent central heating and hot water system that wont cost the earth.
With our help, you can make significant savings on your energy bills by getting an effective, affordable boiler.
Think you already know how much your new boiler will cost? Then the next step is to fill in this short form, and professional installers will send you bespoke quotes.
How much does a new boiler cost?
A new boiler costs £4,000 to install, on average but this price can range from £3,800 to £16,000, depending on what type of boiler you choose.
A combi gas boiler typically costs £3,800, or you can pay a bit more for a system or conventional gas boiler though not as much as youll spend on an oil boiler, which costs around £4,700.
If youre unable or unwilling to use fossil fuel boilers, you can go green by getting an electric combi fitted for a typical cost of £3,350, or a microwave boiler which also runs on electricity for £3,500.
Or, if it suits you better, you can buy a biomass boiler for £16,000, on average.
These are average figures, so if your heating needs differ from the average three-bedroom household, you may need a differently sized boiler which will affect its price.
If you want to live in comfort while saving on your energy bills, choose one of the machines on our list of the best boilers of the year.
And if you want to receive quotes from the best in the business, fill in our quick form, and boiler specialists will get in touch with you.
Type of boiler | Cost |
|---|---|
Gas conventional | £4,200 |
Gas system | £4,000 |
Gas combi | £3,800 |
Electric combi | £3,350 |
Biomass | £16,000 |
Oil | £4,700 |
Microwave | £3,500 |
(Costs are based on a typical three-bedroom house and include installation)
Conventional boiler costs
A conventional boiler also known as a heat-only, open vent, or regular boiler is usually the most expensive gas-powered option, costing £4,200 for a three-bedroom property, on average.
This is largely because it involves extra hardware and installation time.
A conventional boiler takes water from a storage tank, heats it up, then sends it to your hot water tank, from where its distributed to radiators, showers, and taps throughout your home.
System boiler costs
A system boiler typically costs £4,000 for a three-bedroom property
Its usually cheaper than a conventional boiler because it takes water directly from the mains, rather than keeping it in a cold water tank.
Otherwise, it acts like a conventional boiler, heating the water up and sending it to a hot water cylinder to be sent all over your house.
Gas combi boiler costs
A combi boiler usually costs £3,800 for a three-bedroom property, making it the cheapest type of gas boiler.
It costs less because it doesnt need a tank instead, it simply takes water from the mains, heats it up, and sends it straight to where its needed.
Electric combi boiler costs
An electric combi boiler functions in much the same way as a gas combi heating water up from the mains as you need it except it runs on electricity.
It also costs slightly less than a gas combi, with an average price of £3,350 for a three-bedroom property.
Biomass boiler costs
A biomass boiler will cost a three-bedroom property £16,000 on average, positioning it as the most expensive type of boiler on this list.
It burns wood to heat up water, which it then sends to your homes hot water and heating network.
Oil boiler costs
An oil boiler typically costs £4,700 for a three-bedroom property, though the price you pay will depend on whether you opt for a combi, system, or conventional oil boiler, and how big your heating needs are.
In any case, it works just like gas boilers, except its fuelled by oil.
Microwave boiler costs
A microwave boiler will cost £3,500 less than the average gas boiler or at least, it will when its available to customers in the UK.
This new piece of green technology will connect to the same pipework as a gas boiler, then heat up water with microwave technology a completely safe form of electromagnetic radiation.
Boiler cost calculator
New boiler cost based on property size
Boiler prices rise quickly as your home increases in size, before almost levelling out when you get to three bedrooms or more.
A new boiler costs between £2,900 and £4,500, typically, and youll rarely pay £5,000 or more, unless your house is particularly large or raises additional complications.
| Type | 1 bedroom | 2 bedrooms | 3 bedrooms | 4 bedrooms | 5 bedrooms |
|---|---|---|---|---|---|
| Gas combi | £2,200 | £2,900 | £3,800 | £4,000 | £4,300 |
| Gas system | £2,400 | £3,000 | £4,000 | £4,200 | £4,500 |
| Gas conventional | £2,700 | £3,200 | £4,200 | £4,500 | £4,800 |
(Costs include installation)
Are there any government grants for boilers?
When it comes to free boiler schemes and government grants, ECO4 is your best bet.
This government initiative forces large companies to repair or replace old, inefficient heating systems with more eco-friendly machines, though there are specific ECO4 requirements youll have to fulfil.
Suppliers must carry out up to 5,000 boiler replacements per year until March 2026, and repair as many as 5,000 boilers per year too.
If youre with British Gas, npower, ScottishPower, OVO, E.ON, EDF, or SSE, get in touch to see if you can access the free support these companies provide.
If you receive your energy from a different supplier, contact the company, as you may still be able to access help.
What factors affect the cost of a boiler?
There are a few factors that decide the cost of your new boiler, and its important to be aware of all of them before you make your decision.
Size
This is one of the most important factors, as it can make a £2,000 difference in the price you pay or more, if youre looking for a biomass or oil boiler.
Its also a factor you have limited control over after all, the size of your boiler will mainly depend on the size of your home.
However, if you can increase your homes energy efficiency in advance of getting a new boiler, you may be able to reduce the size you need, therefore lowering its price.
Fuel type
Boilers that use certain fuels will be more expensive to buy and install, either because demand is lower or because theyre complex machines or both.
This is why oil boilers cost slightly more than gas boilers, and why biomass boilers are around four times more expensive than a gas model.
Also bear in mind your future running costs before making your final decision, as some fuels cost more than others for instance, biomass fuel is cheaper than gas, which costs less than oil.
Installation
A complicated installation will always increase costs.
This can happen if the boiler you choose is unavoidably complex, or if the job requires your installer to replace or alter pipework in a significant way.
If you want to replace your machine with a different type of boiler for example, if youre moving from an oil boiler to an electric model youll run into this kind of issue.
Brand
A household name will usually cost you more but it may be worth it.
Youll pay a higher price for intangible qualities like a companys reputation, and also for more quantifiable characteristics, like a long warranty.
When youre making an investment that should last at least a decade, its often worth placing your trust in reputable brands, but there are bargains available if you buy from a less prominent company.
How much money will you save by switching to a new boiler?
The average semi-detached three-bedroom house could save as much as £355 per year by buying a new boiler, according to the Energy Saving Trust.
Thats the saving youll make by replacing a G-rated boiler with an A-rated boiler, but even if your old machine was D-rated, youll still save £200 per year.
The typical detached household can save even more by upgrading its boiler. Itll cut its energy costs by anywhere between £245 and £540 per year, on average.
A mid-terrace house will save £165-£295 per year, while a detached bungalow can cut its annual energy bill by £180-£320, and a mid-floor flat can save £75-£135 per year.
After a decade or more of wear and tear, a new boiler will inevitably be more efficient than your old boiler, even before you take technological advances into account.
What are the average running costs of a boiler?
The average three-bedroom house will pay £853 per year to use a gas boiler, at current prices (as of January 2024).
A smaller home will typically spend £594 per year, while a larger house will pay £1,261, on average.
Itll cost you £948 per year to run the average biomass boiler, £1,717 per year to use an electric boiler, and £1,337 per year to fuel an oil boiler for now. Heating oil is likely to get much more expensive in the near future.
A microwave boiler will probably cost roughly the same per year as an electric boiler, unless its widespread design ends up being more efficient.
What are the maintenance costs of a boiler?
Your maintenance costs for a gas boiler will usually be between £70 and £100 per year.
Thats how much it generally costs to get an annual boiler service, which is often required by your boilers company to keep your warranty valid.
Youll usually pay £62£98 if you have an electric boiler, while an oil boiler service will set you back £80-£140, and getting your biomass boiler serviced costs £180£450.
Wed recommend looking into boiler cover, to ensure you can access free boiler services, and so if anything goes wrong, youll be protected against paying disastrous costs.
Next steps
Buying a new boiler is one of the best ways of making your home more energy-efficient, which leads to lower heating bills.
And fortunately, you now have all the information you need to get the perfect boiler for your household.
If youre ready to replace your old boiler with a more effective model, just fill in this short form, and our trusted installers will send you free, bespoke quotes.
