Installing a new boiler can help you save money on your fuel bills, keep your house warm, and help the environment – so find out here just how much will it cost to install a new one.
How much will it cost to install a new boiler in 2023? To help our readers avoid confusion about the supply and installation of a fitted boiler, we have decided to create a guide and try to answer common questions such as how much it will cost to install a combi boiler, a regular boiler, and replace a back boiler. Furthermore, we detailed the average boiler prices and installation costs to avoid any confusion.
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Average boiler prices
According to the Energy Saving Trust, the typical cost of a new gas boiler installation in the UK ranges from £2,500 to £4,500. It’s worth pointing out that the boiler installation prices can also vary depending on the brand and specific model of the boiler, the size of the property, and any additional work that may be required.
Top reasons for installing a new boiler
- You’re going home: Your new property may not have a boiler suitable for your needs.
- You’re renovating: You want to enhance your property’s relaxation and energy efficiency.
- Efficiency: Ensure you have a new, efficient boiler to maintain your home warm and provide hot water.
- The boiler is old – If you bought yours over ten years ago, it’s not as efficient as it could be.
What should you look for in a brand-new boiler?
- Planning Permission: Make sure that you don’t need planning permission to install your new boiler.
- Building regulations: To satisfy building regulations, make sure your new boiler is A-rated or at least 88% efficient as judged by the Seasonal Efficiency of Domestic Boilers in the UK (SEDBUK) scale.
- Condensing boiler: It’s a legal requirement that all new boilers are condensing models.
- The difference between a condensing and a non-condensing boiler is that condensing boilers convert more wasted heat into energy, saving you money and helping the ecosystem.
- If a boiler engineer deems your home unsuitable for a condensing boiler (this is quite rare), you will need to get a certificate to prove you can install a non-condensing one.
- Heating Controls: Make sure the heating engineer installs proper heating controls as per component L of building regulations. This means installing, at the very least, an excellent thermostat.
- Large homes: System boilers have a cylinder to store hot water and are great for large homes.
- Combi boilers also make a good solution for large houses and come in gas, electric, and oil-fired versions.
- They do not store water, but they produce it on demand.
How to estimate the boiler installation costs
To be able to provide some estimated installation costs, we used several scenarios for all the boiler types we provided estimates for, such as:
The boiler prices used are representative of a mid-range boiler and include a standard installation. In several cases, there might occur additional costs, for example:
- Installation of a new gas pipe as the current one if it is undersized,
- installation of a condensate pipe for the first time,
- and installation of a sealed system to provide central heating and hot water via a storage cylinder.
Installation by a Local Boiler Engineer or Replacement Company
When the time comes for a new boiler replacement or simply a boiler repair, your local heating engineers should advise you on what is best to do and carry out the job for you. Experienced heating engineers always need to look at your existing boiler and discuss the available options with you before providing a quote.
If you decide to go with a local engineer, you should know that they usually purchase the boiler system directly from a supplier and install your new replacement boiler. The new boiler always comes with a warranty, so do not worry if anything happens to go wrong after the installation.
Benefit from our service and ask for free estimates from local boilers and heating engineers in the UK. Very often, you will find that local engineers offer very competitive boiler installation rates.
The estimated prices will vary depending on the reputation and local contractor or boiler replacement company that you will hire. Expect to pay around £1,500 – £3,500 for the supply and installation of a no-complicated boiler replacement.
Price by boiler type
The prices listed in the table are only estimates and may vary depending on the model, features, and individual installation requirements. In addition, the prices do not include the installation cost. Before moving on with the installation, you should consult several heating engineers and request a quotation.
|Boiler Brand||Combi Boiler Price Range||System Boiler Price Range||Heat-Only Boiler Price Range|
|Worcester Bosch||£1,500 – £3,500||£1,800 – £2,800||£1,500 – £2,500|
|Vaillant||£1,200 – £3,000||£1,400 – £2,500||£1,200 – £2,000|
|Baxi||£1,100 – £2,500||£1,400 – £2,500||£1,200 – £2,000|
|Ideal||£1,000 – £2,500||£1,400 – £2,500||£1,200 – £2,000|
|Potterton||£1,100 – £2,500||£1,400 – £2,500||£1,200 – £2,000|
|Viessmann||£1,500 – £3,500||£1,800 – £3,000||£1,500 – £2,500|
New boiler installation cost by energy supplier
When having a new boiler fitted, most people prefer to contact their existing service provider to get the job done quickly and efficiently. We contacted the following gas and energy providers, who came up with the following figures:
British Gas: The cost of installing a replacement boiler can vary depending on the type of boiler and the complexity of the installation. British Gas offers boiler installation services with prices ranging from £900 to £3,000. Additionally, the estimated cost of installing a Worcester Bosch Greenstar 4000 25kW boiler with a Hive mini smart thermostat and a 5-year warranty through British Gas is £3,177.
EDF Energy: Can install a new boiler for £1,500 to £3,500 (including annual protection and fixed energy prices)
E.ON: For a combi boiler installation cost may range from £2,585 to £4,397, including VAT. For a conventional boiler installation, the cost may range from £2,367 to £3,058, including VAT. Additionally, the cost of a regular boiler installation with E.ON can start at £2,375, depending on the complexity of the installation and the model chosen.
Npower: Carry out a new boiler installation for £2,800 to 3,600 (higher prices including a five-year free servicing and repair warranty). New boiler installation cost by work involved
Boiler Replacement Costs
The cost of installing a new boiler might also depend on how much work the contractors have to get on with. The extent of the work involved will depend on the type of boiler you purchase and the older model you are replacing.
Gas Combi Boiler: According to a survey conducted by Which?, the average cost of replacing a gas combi boiler in the UK is between £2,500 and £4,500. However, this is only an estimate, and the actual cost can vary significantly.
Non-condensing boiler: According to a survey conducted by Which?, the average cost of replacing a non-condensing boiler with a condensing model in the UK is between £2,000 and £3,000.
Combi Boiler: Replacing a combi boiler with an older, sealed heating system costs around £2,000 to £2,200.
How much to install a new gas boiler?
Combi Boilers Prices & Installation Costs
At the lower end of the price range, you can expect to find basic models starting from around £500 to £600. These boilers typically have a lower output rating and may have fewer features or be less energy-efficient compared to more expensive models.
On the higher end of the price range, you can find premium combi boilers with advanced features and high energy efficiency ratings. These boilers can cost anywhere from £2,000 to £4,000 or more, depending on the brand and model.
On top of the boiler’s purchase price, you’ll also need to factor in the parts and labour for getting it fitted and working. It’s normal to pay in the region of £650 – £1450 or so for a full professional installation package by a licensed and registered heating engineer.
Gas is the cheapest, most efficient kind of heating fuel you’re able to use. Costing around £490 a year, according to Which? These factors make gas boilers probably the most popular type – with 69% of households installing them in the UK.
|Brand||Combi Boiler Price||Installation Cost||Total Cost|
Gas boiler Installation cost
On average, a gas boiler installation can cost anywhere from £1,500 to £3,000. The installation includes the cost of the boiler itself and the labour. However, the cost can increase significantly if the installation requires additional work, such as upgrading the gas supply or installing a new flue system.
Even a standard gas boiler can represent an efficient option for heating the house and providing hot water. The average cost of heating a home using gas is around the £700 mark, considerably lower than alternative fuels like oil, wood, and electricity.
Buying a new gas boiler means handing it over somewhere in the region of £1,500 to £3,000, depending on how powerful the boiler should be. As with combi boilers, the total installation and labour costs will range from £650 – £1,450, depending on your requirements.
Oil boiler installation cost
An oil boiler system works similarly to a gas system, but it uses an oil-fired boiler to heat water, which provides central heating via radiators and hot water through taps. Oil boilers can cost anywhere between £2,500 and £4,500, depending on the type and size. The price includes the installation cost.
If you consider buying an oil boiler, you will have to consider the installation costs involved and the running costs. Which? Estimated that the average cost of oil heating for a three-bedroom house is £1,355, compared to £770 and £950 for mains gas, depending on the boiler’s efficiency.
- Worcester Bosch – Prices for Worcester Bosch oil boilers start from around £1,500 and can go up to £3,000 or more.
- Grant – Prices for Grant oil boilers start from around £1,200 and can go up to £3,000 or more.
- Vaillant – Prices for Vaillant oil boilers start from around £1,800 and can go up to £3,000 or more.
- Baxi – Prices for Baxi oil boilers start from around £1,500 and can go up to £2,500 or more.
- Viessmann – Prices for Viessmann oil boilers start from around £1,500 and can go up to £3,000 or more.
Make sure that your installer is registered with OFTEC (Oil Firing Technical Association) and that the installation meets all safety regulations.
Electric boiler installation cost
Electric boilers remain a popular option for small to medium-sized homes despite costing a little more to run. They produce hot water for both heating and domestic use.
Whilst most people would only opt for an electric boiler if they lived in a rural area in which oil or gas access was not available, many people now recognize the environmental benefits, as well as the lower running costs.
Electric boilers tend to be much easier to set up and are cheaper to buy in the first place. Electric boilers supply and installation start from £1,100 and can go over £4,000. Furthermore, heating a home with electricity isn’t cheap – national averages for the UK come out in the region of £1,500 per year.
Best Combi Boiler
The following table contains the price range for combi boilers and also the score for each boiler brand. The score is a combination of industry standards and survey data we collected from homeowners.
|Boiler Brand||Price (average)||Score (out of 10)|
|Worcester Bosch||£1,200 – £2,000||9.5|
|Vaillant||£1,200 – £2,000||9.4|
|Ideal||£800 – £1,500||9.0|
|Baxi||£800 – £1,500||8.8|
|Viessmann||£1,000 – £2,000||8.7|
|Glow-worm||£700 – £1,300||8.5|
Baxi Boiler Costs
Founded in 1866, Baxi is one of the largest boiler manufacturers in Europe and one of the most reputable brands in the UK boiler market. Based in East Midlands, the Baxi boiler brand has a strong commitment to innovation and excellence and produces a wide range of heat-only, system, and combi boilers suitable for any budget.
Baxi boilers are quality products that exceed the latest European energy efficiency, safety, and emissions. Baxi boilers are super-efficient and have received a SEDBUK A-rating. They are compact and user-friendly. By choosing a Baxi to heat your home, you can rest assured that you are purchasing a quality product at an affordable price.
Types of Baxi Boilers
All Baxi boilers (heat-only boilers, system boilers, and combi boilers) use natural gas and LPG (liquefied petroleum gas). Combi boilers are becoming particularly popular given how compact, energy-efficient, and easy to use they are.
The Baxi range of combi boilers includes the Baxi 100, 200, 400, and 600 and the Platinum, Duo-tec, EcoBlue Advance, and EcoBlue+. The system boiler range includes the EcoBlue System and Megaflo System, while the heat-only range models EcoBlue Heat and Advance Heat, Baxi 200 Heat, and Baxi 400 Heat also make a perfect choice.
How to choose the right boiler size?
Many homeowners wonder which size of boiler best fits their needs. Here are a few recommendations:
|Property Type||Details||Boiler Requirements|
|Flat or Terraced Property||4-5 bedrooms, one bath, ensuite shower room||24-27kW combi|
|3-4 bed house||4-5 bedrooms, one bath, ensuite shower room||12-15kW system boiler|
|4-5 bed property||4-5 bedrooms, one bath, ensuite shower room||30kW system boiler|
How Much is a Baxi Boiler?
Baxi boiler’s prices range between £700 and £1,800 and depend on the size and type of the boiler. However, the price does not include the installation cost, ranging from £250-£300 depending on how much work is required and whether the gas boiler needs to be installed in a new location. So, the average Baxi boiler installation cost comes to £1,550 + in a different location, and around £1,450 of it is sited in the same place as the old boiler.
Baxi is a popular boiler brand in the UK and offers a range of gas, combi, and system boilers. Here are some estimated prices for Baxi boilers :
- Baxi 200 Combi Boiler – Prices for the Baxi 200 Combi boiler start from around £700 and can go up to £1,000 or more.
- Baxi 400 Combi Boiler – Prices for the Baxi 400 Combi boiler start from around £900 and can go up to £1,300 or more.
- Baxi EcoBlue Advance Combi Boiler – Prices for the Baxi EcoBlue Advance Combi boiler start from around £1,000 and can go up to £1,500 or more.
- Baxi Platinum Combi Boiler – Prices for the Baxi Platinum Combi boiler start from around £1,200 and can go up to £1,800 or more.
Worcester boiler costs
Worcester is one of the most popular and well-known boiler manufacturers on the market. The brand has a reputation for creating high-quality gas, LPG, and oil boilers. Worcester is now part of the Bosch Group and remains one of the top boiler manufacturers, committed to delivering reputable and cost-effective central heating products.
Worcester gas boilers offer many benefits if you want to replace your old boiler or simply install a brand-new one. There are many different models to choose from available at any budget.
Types of Worcester boilers
Worcester boilers can fit any kind of heating needs and budget with their powerful regular, system, or combi boilers ranging from 12kW to 42 kW output. Popular regular Worcester boiler models are the Greenstar 15Ri (15kW output), Greenstar FS 42CDi (42kW), and Greenstar 40CDi Classic Regular (40kW).
If you are interested in system boilers, popular models are the Greenstar 24i System (24kW), the Greenstar 15i System (15kW), and the Greenstar 30CDi Classic System (30kW).
From the Worcester combination models range, you can choose the Greenstar 24i Combi (24kW), Greenstar 28CDi Compact (28kW), Greenstar Highflow 550CDi (30kW), and the Greenstar 42CDi Classic (42kW).
Which Worcester boiler do I need?
- Apartment/house with 10 radiators + 1 bath = 24-27kW combi boiler
- 3 bed house = up to 28kW combi boiler
- 3 bedroom + 1 bath = 2-15kW regular or system boiler
- 4 bed house + 1 bathroom + 1 ensuite shower room = 30kW
How Much is A New Worcester Boiler?
Worcester gas boiler prices start from as little as £687 and go over £2,000, depending on their performance and features. The prices include VAT but not the installation costs, for which you need to add £500 – £1,000 depending on the boiler type and labour work required. Below we have created a table with several representative Worcester boiler prices:
The cost of a new Worcester Bosch boiler in the UK can vary depending on several factors, including the model of the boiler, the kW output, and the complexity of the installation. However, as an AI language model, I can provide you with a general idea of the prices for Worcester Bosch boilers based on historical data.
Worcester Bosch is a popular and reputable brand in the UK and offers a range of gas, oil, and LPG boilers. Here are some estimated prices for Worcester Bosch boilers:
- Worcester Bosch Greenstar 2000 Combi Boiler – Prices for the Worcester Bosch Greenstar 2000 Combi boiler start from around £900 and can go up to £1,500 or more.
- Worcester Bosch Greenstar 4000 Combi Boiler – Prices for the Worcester Bosch Greenstar 4000 Combi boiler start from around £1,200 and can go up to £2,000 or more.
- Worcester Bosch Greenstar 8000 Life Combi Boiler – Prices for the Worcester Bosch Greenstar 8000 Life Combi boiler start from around £1,500 and can go up to £2,500 or more.
- Worcester Bosch Greenstar Danesmoor External Boiler – Prices for the Worcester Bosch Greenstar Danesmoor External boiler start from around £1,500 and can go up to £3,000 or more.
Worcester Boiler Benefits and Savings
Worcester gas boilers are 90% efficient, which means that at least 90% of the fuel they burn is turned into heat. If you have an old G-rated noncondensing boiler, it will achieve 60% efficiency in the best of all scenarios. Since each home spends on average, 60% of its energy bills on boilers, getting a boiler replacement could save a significant amount of money.
By installing a new Worcester gas boiler, you get to:
- Reduce energy bills
- Convert at least 90% of fuel into heat
- Have peace of mind for 2 – 5 years (boiler guarantee)
- Have 10 years free service or replacement for the primary heat exchanger
Hiring a boiler engineer
You must hire an experienced boiler engineer to install your new
boiler; whichever kind you select:
- Hire a Gas Safe engineer for gas boiler installation
- A professional electrician will be able to put in your electrical boiler to British Standards 7671: 2008 Conditions for Electrical Installation
- An OFTEC registered engineer can safely install, repair or service your oil boiler
- Hire a HETAS registered engineer to set up a solid fuel-burning boiler
Boiler Repair Companies
Luckily, several boiler repair companies are available to commercial and domestic clients around the clock who are ready for emergency boiler repair in London. Who you call when you need immediate service with suitable pricing is in your hands. There is a shortlist of criteria to think about before you hire. When you don’t have much time to research your options, here are some quick items to ask about.
Things to watch out for:
Any boiler repair and service company you hire should be licensed in their trade and carry insurance that protects providers and clients.
The experience of the emergency boiler repair firm is communicated by how long they have been in business, and your confidence can be established by the warranty they provide on both products and artistry. With any boiler emergency, repair timelines are critical, so you also want to consider who can respond first and complete the job with minimal disruption to you.
References and Fees
Often, you may not have the opportunity to check references, but you should still ask the provider about what they have done in the area of repair. Boiler services and maintenance they offer may also be relevant to you. Upon their arrival to your premises, ensure a clear understanding of the work to be done, the fees agreed to, the timeline for completion, and the warranty that is being assured, and get it in writing.
Emergency boiler repair is not a situation that any homeowner relishes, but the confidence gained in securing the right provider removes one less aggravation from the process. With any luck, you may still get tucked back into bed in plenty of time to enjoy a good night’s sleep.
Boiler installation grants
Nearly all the main energy companies (including – but not limited to – Atlantic, British Gas, EDF, Eon, Scottish Hydro, Scottish Power, SSE, Southern Electric, and Utility Warehouse) are required to contribute to these boiler grants UK and boiler grants Scotland initiatives, as outlined by the government’s Green Deal Financial Scheme – but how do you know if you are eligible for a boiler replacement grant? Well, that depends. Firstly, your boiler must be:
- More than ten years old, and…
- In a reasonable state of disrepair (as certified via a free inspection from your local authority or energy provider).
Check Your Eligibility
To be eligible for a boiler grant (either a full or partial amount), you must also fulfill at least one of the following criteria:
- Receive Pension Credit.
- Receive Child Tax Credit or Working Tax Credit (your eligibility here is usually wage dependent; in the 12/13 tax year, only those earning less than £15,860 would be able to claim for a new boiler grant).
- Receive some kind of Income Support, Employment Support Allowance, or income-based Jobseeker’s Allowance (and in this instance, also have either a child under 16 or a child under 20 in full-time, non-university education and/or a severe disability or disabled worker elements such as Disability Child Premium or Disability Pensioner Premium).
There’s no doubt, however, that a new boiler can be pretty expensive. Depending on what size, type, brand, and fuel they use, boilers can cost between £600 and £2,000 to buy, not including professional installation. However, you may be able to lower the cost of your new boiler by applying for one of the following grants for new boilers.
Boiler Grants UK
Check your eligibility for the following boiler replacement grant schemes:
The Green Deal – most boiler grants have been replaced by the government’s Green Deal, which provides cash up-front for households to install energy-efficient home improvements such as installing a new boiler. The money isn’t, unfortunately, a grant as such – you have to pay the cashback over time through your energy bills or a repayment meter. Contact the EST to apply for the Green Deal; to be eligible, you’ll need to have a Green Deal Assessment carried out by an approved Green Deal Provider who will arrange for the work to be carried out and paid for.
Boiler Grants Scotland – The Scottish Green Homes Cashback Scheme has replaced the Scottish Boiler Scrappage scheme and offers Scottish residents up to £400 towards the cost of a new boiler if one is recommended in a Green Deal Assessment.
To apply for one of these grants, you’ll need to have a Green Deal Assessment carried out, and if a new boiler is approved, who will send your voucher to you via email or post. Once you get the voucher, have your new boiler installed within 12 weeks of the date on the voucher and pay the installer.
Send the completed voucher and invoice for the new boiler to the Scottish Energy Saving Trust, which will transfer the money into your bank account within 25 days. You must use a Green Deal certified installer and get a new Energy Performance Certificate once the boiler has been installed; check with the Energy Saving Trust to determine the full eligibility criteria.
Energy Supplier Grants – energy companies are required under Carbon Emission Reduction Targets (CERT) to help their customers make their homes more energy-efficient. This includes offering grants and discounts for new boilers. Check with all different energy companies to find out whether you’re eligible for a grant – you can apply for grants from any supplier, not just the one you use.
Local Government grants – government grants for boilers may still be available from your local government or Home Improvement Agency (HIA); depending on your circumstances, ask for more details.
Warm Front Grants – sadly, the Warm Front Scheme, which provided grants of up to £3,500 towards the cost of new boilers for residents in England, is now closed.
How to choose a new boiler
Buy a similar-sized combi boiler unit.
While it may seem like a no-brainer, you must purchase a similar-sized combi boiler when you need to replace a broken one. Going with a fancier or more elaborate combi boiler may be tempting, but that may cause issues for you, as it may not fit in the current space. Be sure to measure all replacement boiler options and go with one that is either the same size or just slightly smaller or larger. The instruction manual for your old unit may have its measurements, which will help you measure new units.
Choose the right model.
Even though you probably did all the research the first time you bought your combi boiler, it may be a good idea to brush up on what models are out there to ensure you are getting the best unit for your home.
Options from Vaillant, Baxi, and Glow-Worm are examples of different models on the market today. Make sure to choose a unit that will not only adequately meet your heating needs but that fits in your designated space. You may want to consult an expert for advice to ensure you get what you need and want.
Test all controls and switches
It may seem obvious, but you must test all the controls, levers, and thermostats on your own to make sure you can operate them. If you cannot work them on your own, your combi boiler will not work properly. It is OK to ask the installer or a professional in the industry how things work or show you how to operate the unit this way, and you will know how to run the unit.
Check the warranty/guarantee.
Lastly, be sure to get a full warranty or guarantee with your new unit. It is oftentimes too late to do so once you have purchased the unit, so make sure to check before you buy. This is sometimes listed in the total buying price, but some retailers may not do this, so it is important to ask. A warranty or guarantee will undoubtedly save you money on repairs in the future but note how long who will cover the unit.
Boiler breakdowns are no fun, regardless of how you look at them. With fall here and winter on the horizon, you definitely don’t want to be dealing with a loss of heat. Unfortunately, you cannot plan for a boiler breakdown. However, if you currently heat your home with a combi boiler, you will be pleased to know that getting a replacement is far easier than you may think.
Because combi boilers do not have radiators, copper piping, or old hot water storage tanks, choosing a replacement is as simple as picking out a new, similar model and getting it installed. While it may be less of a headache than with old models, this does not mean it is a complete walk in the park. There are still numerous things to consider when choosing a replacement boiler, some of which are outlined below.
Once you’ve got the finance sorted for your new boiler, you need to choose the right one for your property; make sure that:
- It’s A-rated or at least 88% efficient on the SEDBUK scale.
- You choose a condensing model – this is a legal requirement in the UK, and all new boilers are condensing.
- Your new boiler comes with proper heating controls for extra energy efficiency.
- You hire a professional to fix your boiler. Look for a Gas Safe Registered engineer if you’re fitting a gas boiler, someone registered with OFTEC if you’re installing an oil-fired boiler, or a qualified electrician if you need to install an electric boiler.
Benefits of a new boiler installation
There are several benefits to looking into grants for new boilers and having your existing boiler repaired, replaced, or updated. A new combi-boiler, for example, will:
- Function more reliably than a hot water system and keep water heated for longer – saving you time on waiting around to get in the shower each morning.
- Be easier to use than a hot water system, thanks to an in-built control panel and easy-to-read instruction manual that comes with every purchase.
- Deliver clean water to every faucet and outlet in the property, allowing you to get drinking water from any tap in the house.
- Last for longer and require less maintenance than an old, creaky system suffering from poor circulation and struggling to work at its peak with old pipework and dated radiator units.
- Improve your home’s energy efficiency by heating only as much of the property as you’d prefer, thanks to a high-tech thermostat and improved radiator units that don’t waste heat.
- Reduce your gas and electricity bills over time, as less wasted heat means you won’t be turning up the thermostat as regularly as usual!
Remember, with the current Coalition government’s changes to Income Support and the introduction of Universal Credit, this eligibility criteria is likely to change in the next year or so – so if you remain unsure about whether or not you have access to a brand new boiler grant you should get in touch with your local authority for the most accurate, up-to-date information possible.