What's in this article?
A guide to new boiler costs in 2021.
Finding the true cost of a new boiler is incredibly confusing and anger inducing, like struggling to remove a spider web from your face.
Why do boiler installations range from worryingly cheap three figure deals to mortgage worthy sums from the big energy companies?
Important point: You do not have to buy your boiler from the company that provides your gas or energy bills.
Please note: Ultimately an accurate boiler installation cost depends on a variety of factors personal to your situation.
How much does a new boiler cost? Overview:
How much is a new boiler fitted?
The cost of a boiler replacement depends on a variety of factors, these include:
- Boiler replacement cost e.g. the boiler model you'd like to install.
- Type of boiler.
- If you want to move your boiler.
- Extras e.g. smart controls and filters.
However, a straight-forward combi swap is the most popular and typically the least expensive.
Book before 3 pm and you could get your new boiler installed as quick as tomorrow. Check the latest boiler prices here.
How much is a standalone boiler?
A lot of people are interested to know the stand-alone boiler costs. A new combi boiler or system boiler can cost between £600 -£900 for a budget model, £900 - £1,200 for a mid-range model and £1,000 - £2,000 for a premium model depending on the size of the boiler. A regular or heat-only boiler can cost anywhere between £500 - £2,000 depending on the size and quality.
Boiler Installation Cost Scenarios:
Let's start with the UK's most common type of boiler replacement - the gas combi boiler:
Combi boiler costs? £1,500 → £3,500
A new combi boiler costs anywhere from £1,500, all the way up to £3,500, including installation, depending on the type of boiler you'd like, it's warranty length, how complex the required installation is, and what the labour costs are in the area which you live.
Premium boiler replacement cost = Premium prices.
Complex boiler installation = Complex new boiler installation costs.
London boiler costs = Bloody expensive.
If it's a straight forward job, you should be looking towards the lower end of the scale. If your job is crazy complicated, expect the worst. Most end up with a new boiler cost somewhere in the middle.
Learn all about combi boilers in our what is a combi boiler guide.
P.S - We fit new combi boilers for £1,595, all over the UK, within 24 hours. Get a fixed quote online.
What is a combi boiler, anyway?
A combi boiler is simply a ‘combination boiler’ - it controls both your heating and hot water, delivering them both instantly on-demand, and doesn’t require a hot water cylinder to be heated prior. They are far more efficient than immersion heaters, so if you have one, it's definitely worth considering an upgrade.
Combi boilers are the home heating dream that the human race has been striving towards since the discovery of fire.
Imagine if Usain Bolt was your postman, but he also did your bins. A combi boiler is like that... basically.
Combi boiler costs - boiler replacement cost guide:
These fixed prices assume a straight forward swap, and the new boiler costs include a chemical cleanse, wireless controls, boiler filter, full Gas Safe installation, and more.
Curious to know which boiler brand performed worst? Find out in our report of the worst boilers.
How much will your boiler replacement cost?
|Viessmann 050-W 29kW||£1,695|
|Viessmann 050-W 35kW||£2,075|
|Viessmann 100-W 26kW||£2,147|
|Viessmann 100-W 30kW||£2,304|
|Ideal Logic 24kW||£1,650|
|Ideal Logic 30kW||£1,845|
|Ideal Logic 35kW||£2,245|
Want the latest new combi boiler deals? If you want to get a boiler replacement cost quickly, click "get quotes" in the table above.
You could sleep well for years to come having acquired any of the above central heating boilers, but it is without a doubt that the Viessmann comes out on top in almost every comparable dimension.
Regular and System boiler replacement cost? £1,500 → £3,000
A new regular (or system boiler) boiler replacement cost can range anywhere from £1,500, all the way up to £3,000. Again, the final cost can be affected by a number of factors including but not limited to; the boiler manufacturer (and warranty length), required controls, additional pumps/valves and the general complexity of the job.
Want a new system or regular boiler with professional installation as quick as tomorrow? Get your free quote today.
Unlike combi boilers, regular/system boilers require a hot water cylinder in order to function. The new boiler costs above are for the installation of the boiler only and do not include any costs for new/replacement cylinders.
Interested in paying for your boiler monthly? Check our boilers on finance guide, for the full run down.
What actually is a regular or system boiler?
For reasons of ease and boredom evasion, we’ll combine ‘regular’ and ‘system’ boilers into the one breakdown.
From a purchasing point of view, all you’ll need to know is that they aren’t combi boilers, they’ll have a separate water cylinder (usually in an airing cupboard) and/or water tank (often in your loft) and they don’t provide instant hot water on demand.
If you live in a large home (high hot water demand), with multiple bathrooms, then a system/regular boiler is perfect for you. Check the latest system boiler prices here.
Regular/system boiler replacement cost summary:
These fixed boiler replacement costs assume a straight forward swap, and the costs include a chemical cleanse, boiler filter, full Gas Safe installation, and more.
|Vitodens 100-W 13kW||£1,995|
|Vitodens 100-W 19kW||£2,295|
|Vitodens 100-W 26kW||£2,540|
|Vitodens 100-W 35kW||£2,879|
|Ideal Logic 15kW||£1,895|
|Ideal Logic 19kW||£2,095|
|Ideal Logic 24kW||£2,360|
|Ideal Logic 30kW||£2,879|
Click "get quotes" in the table above if you want a fixed priced based on the latest new combi boiler deals.
How much does it cost to convert from a regular boiler to a combi boiler? £2,500 → £4,500
Upgrading a traditional boiler to a combi boiler is a bucket list regular for most UK homeowners, sitting seven places above seeing the Pyramids and just one below breaking free from lifelong, crippling debt.
Conversions can be complex beasts, and they come with costs you'd associate with a complex beast.
Please note: Ultimately an accurate boiler installation cost depends on a variety of factors personal to your situation.
But exactly how much extra will you be paying?
Included in the cost of a boiler conversion, is the full removal of your old boiler & water cylinder, newly upgraded pipework fed to the existing or new location of the incoming combi boiler and of course, the new combi boiler itself.
...and that’s a simplified version.
It can be a big job, requiring two days of work and engineers so, in tune with their tools, they can make a crowbar dance.
Putting you out of your misery early, you’ll roughly be looking at at additional £800 - £1200 worth of expense on top the standard boiler swap cost
New boiler conversion costs:
These fixed prices assume a straight forward conversion, and the costs include all of the above, plus upgraded heating controls, a full chemical cleanse of your existing boiler system, boiler filter and registration.
Do note that other, much more expensive quotes are available elsewhere. Try your energy provider if you fancy a laugh.
|Ideal Logic 24kW||£2,790|
|Ideal Logic 30kW||£2,990|
|Viessmann Vitodens 050-W 29kW||£3,039|
|Viessmann Vitodens 100-W 26kW||£3,370|
Have you had a new boiler quote yet? Use our calculator to get an instant new boiler quote.
When converting your regular boiler into a combi boiler, do remember that any boiler manufacturer can be fitted so long as it’s the correct size and powerful enough for your hot water demands and consider referring to our Best Combi Boiler 2020 article to gain more insight than you ever thought possible.
Want to know which boiler power is right for your home? Check out our "what size boiler do I need" guide.
How much does a back boiler to combi conversion cost? £3,000 → £5,000
You can scan over a more comprehensive back boiler description in this article if you’ve run out of paint to watch dry…
…But a broken back-boiler is an old dog that needs to be put down.
They can no longer be repaired in accordance with modern regulations and you will need to convert your system - most likely to a modern combi boiler.
Heatable apply a transparent, and fixed cost of £395.00 on top of our standard conversion costs. This can get much steeper when buying from other national companies so make sure you don’t settle for your first quote.
The work involved in the conversion of a back-boiler is very much similar to a standard conversion in that it includes the removal of your entire existing system and introduction of the new combi and required pipework, however, it’s the awkward location of the back boiler behind your fireplace that incurs the sometimes significant extra cost.
Many installers and installation companies hate carrying out this work and will therefore simply price themselves so high they can just about bare it or high enough to discourage customers.
Want to have your boiler moved to a different location? Check out our "cost of moving boiler" guide.
If your radiator is cold at bottom, it may be a sign of faulty heat exchanger a faulty boiler valve, in which case getting your new boiler replaced may be appropriate, check out the Worcester Bosch Greenstar 30i, which you can purchase through us.
Want an exact price on a new boiler?
Case study: Cost to convert a Baxi Bermuda back boiler to a combi boiler
Converting from a Baxi Bermuda - or any brand of back-boiler - can appear costly upfront but the rewards are there to be reaped for years to come.
Replacing your old back boiler will:
- Significantly reduce your energy costs
- Slash your carbon footprint
- Provide you with instant hot water on demand
- Save your marriage
- Improve the safety of your home
- Increase the resale value of your property
Is your home doomed with a back boiler which you can't afford to convert? Sell it (your whole house that is).
What is the cost of a new boiler replacement?
Top 10 factors which can affect the cost of new boiler replacement
The raw bones of pricing structure may well be the cost of boiler + labour cost.
But that’s an oversimplification.
Here are the top 10 factors to take into account when calculating your new boiler costs (...there's a lot!):
#1 - How much does a new boiler cost? £400 → £1200
Probably the most pivotal aspect of any installation – the actual boiler. Boiler replacement costs for quality boilers will be in the high hundreds/early thousands and vary depending on their quality, model, kW size, and brand.
Typical boiler replacement cost:
£400 → £1200
#2 - Boiler installation labour cost: £600 → £1500
The cost of a boiler installation will depend on the amount of labour required. This can vary based on your location and the business you use, how long it takes to install the boiler and the number of engineers required.
On average the cost to install a new boiler will be between £500 and £1,000, which depends on the exact type of installation.
For example, a combi swap, taking around a day to complete is much quicker than a back boiler conversion, which takes around 2 days and may require more than one engineer to attend.
The cost of boiler installation is typically included in the fixed price quote, so if you choose to purchase your boiler via Heatable you don’t have to worry about juggling different costs and calculate a final figure.
Labour cost (swap):
£600 → £800
Labour cost (conversion):
£1000 → £1500
Want an exact quote on new boiler replacement cost?
#3 - Vertical flue cost: £300 → £600
A boiler flue, simply put is the large pipe that leads from the boiler to outside of your home – ensuring condensation and flue gases are pumped outside and not into your own face – vital.
Most of the time, the flue will leave your property horizontally incurring no extra costs but flues that leave vertically through your roof require much more work and therefore incur more costs. It can be just plain bad luck.
Typical vertical flue cost:
£300 → £600
#4 - Plume kit cost: £90 → £130
A plume kit is essentially an extension kit that attaches to your boiler’s flue. The plume kit is required in instances where your boiler's flue is too close for comfort to a window, door, neighbouring property, or your wife and is required by law in order to comply with Gas Safe regulations.
Failure to include a plume kit could lead to London standard air purity levels. Unless you already live in London, in which case, boiler fumes may seem a welcome breath of fresh air.
Typical plume kit cost:
£90 → £130
Want an exact price on a new boiler?
#5 - Main gas pipe upgrade cost: £250 → £400
Many older heating systems are built using gas piping of a certain width (often 15mm). To meet modern regulations, they need to be upgraded to 22mm in most cases which can sometimes incur additional costs.
In some instances, older pipes will also be made from lead, cheddar or the bones of early settlers and these will need to be replaced with copper piping.
Heatable never charge for upgraded pipework, whereas most installation companies will add this to your bill with unnerving pleasure and an evil laugh
Be wary of rogue traders that don’t plan for upgraded pipework – their boiler replacement costs and installation fees will be more illegal than the contents of a duffel bag in the back of their uninsured white van.
Typical gas upgrade cost:
£250 → £400
Our gas upgrade cost:
#6 - Cost to relocate boiler
Moving the location of your boiler is costly and will require a lot of physical labour, additional pipework, emotional robustness as well as various general new fixtures and fittings.
Unless moving your boiler is integral to every hope and dream you have held since you were a child, do try to avoid it.
Want to save money and energy on your heating bills? If so, you should consider installing one of the best smart thermostats.
#7 - Upgraded heating control costs: £100 → £300
The days of having a pain staking, back breaking walk to your boiler to switch it on are almost behind us as a species and most new boiler installations will include some form of upgraded controller.
Depending on the type and brand of the controller, it will add varying figures to your new boiler cost.
Heating controls cost:
£100 → £300
Our heating controls cost:
£0 - that's free!
#8 - Upgraded warranty costs
Extended warranties, particularly 10-year warranties in most cases are only able to be offered by trusted partners of manufacturers.
They can sometimes rely upon the fitting of additional approved equipment like magnetic boiler filters and will often incur additional costs to that installer, but a longer warranty is certainly a cost worth incurring.
Think you've found a bargain? Check the warranty length has a longer expiry date than the last lot of milk you bought
#9 - Magnetic boiler filter cost: £100 → £200
Filters are installed inline on the pipework and help to protect your boiler. They use powerful magnets which trap small particles of dirt and metal, stopping them from going in to the boiler itself and causing unecessary damage and boiler leaks.
A quality boiler installer will always build the cost of installing a filter in to your quote. We include them, but we don't charge a penny more and fit them as standard throughout the UK.
Magnetic boiler filter cost:
£100 → £200
Our magnetic filter cost:
#10 - Chemical flush: £100 → £150
Flushes help to clear out existing sludge from your heating system. If you don't clear it, sludge will stop the hot heating water from flowing around your radiators efficiently. Not good. You'll be needing a deep clean if your radiators are cold at the bottom.
There are various types of 'flushes' available. A hot, chemical flush is most common and pretty standard. But, you can pay upwards of £500 for a 'Powerflush'. Be careful with those, though. If you start forcing high pressure water through an old heating system, they can often do more damage than good.
Did you know our boiler installation cost calculator only takes 60 seconds to complete? Using a series of multiple-choice questions, it can provide you with a fixed price on a range of budget-friendly boilers.
Chemical flush cost:
£100 → £150
Heatable's flush cost:
£0 - Free again.
#11 - Radiator Costs: £100 → £150
When installing a new boiler, it's often a good idea to look at your heating system overall, which includes your radiators. After years of use, it's normal for radiators to experience wear and tear, or if they are simply old models they may be inefficient and have a poor performance in comparison to the latest offerings.
The exact price of new radiators depends on a variety of factors including size, material, design and how many you require.
Cost of a new boiler replacement
As you can see there are a variety of factors that can impact the final boiler installation cost.
Suffering the costs of a new boiler? Here's how much you'll save in the long-run.
Old boilers are inefficient and for every £10 you’re spending on running them, you could be throwing up to £4 of that out of the window.
This creates a huge mound of pound coins on your patio that poses a risk to the local eco system.
This greatly reduces the amount of fuel used, whether that be Gas, Oil or LPG.
Want to know your new boiler installation costs?
Feast your eyes on the above typical savings courtesy of the Energy Saving Trust.
They’re the most trustworthy name in the UK energy savings data collection game – an industry notorious for its untrustworthy, shark filled business waters.
Boiler Replacement Costs Frequently Asked Questions (FAQs)
Why is British Gas Boiler Installation so Expensive?
We often get people surprised at the price differences between ourselves and the likes of British Gas.
The British Gas boiler installation service is usually quite expensive, typically costing several hundred pounds more than competitors.
The major reason for this is that we don't have huge overheads to pay for, including call centres, marketing, and a nationwide network of engineers.
But if you read the reviews left by customers, it's clear that our service is superior.
For comparison, refer to our Trustpilot reviews, with over 1,000 reviews and averaging 4.9 stars, we take great pride in offering a hassle-free boiler service.
Are labour costs included in the new boiler installation costs?
Our boiler installation costs include the price of the boiler itself as well as the gas engineer's labour costs.
Unlike your average boiler installation company, our fixed price guarantee means the price you are quoted won't change.
We know how frustrating it can be for an engineer to turn up at your home and start adding additional costs onto the originally quoted price. That is why we made a service that completely avoids this common complaint.
If you need additional labour, this will be reflected in the fixed price. For example, a straight boiler replacement will take less labour and time than a complete boiler conversion, so will cost less.
How long should a new boiler last?
On average, modern boilers are designed to last around 10 years, but of course, this is impacted by how well it's taken care of.
Boilers should be serviced annually by a registered Gas Safe engineer. This will ensure the boiler is well maintained, in good working order, and safe to use.
Your warranty will also usually be void without an annual service record. A warranty will ensure that the boiler manufacturer takes care of any issues that arise during the warranty period, so it's certainly worth it.
Boiler installation cost conclusion & some key takeaways:
New boiler costs are a financial minefield that you could research until the end of your days.
Your boiler replacement cost can range from close to £1,000 - £6,000 depending on the work required and your chosen installation company.
Always ensure you receive the below, no matter what you’re going to be paying:
- A fixed price with no surprise extras after work begins
- A full parts & labour warranty that you’re comfortable with
- A magnetic boiler filter
- A system flush
- Check company reviews before committing to payment
Stick to these key principles, avoid any company sending a salesman disguised as a ‘surveyor’ to your home, and put in just a touch of boiler research – do that here, conveniently 😉
You’re now just about as qualified as can be reasonably expected in order to get the most competitive new boiler cost available and avoid cowboys eying you up like an early noughties PPI victim.
Or, for simplicity…
Buy from Heatable for the latest new combi boiler deals.