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How Much Does a New Boiler Cost?

If you’re thinking about buying a new boiler, there are a long list of things you’ll need to consider when working out the cost. We take a look at these and the affordable monthly payment plans available. 

Get a new boiler

There are a wide range of factors that influence how much you’ll pay for a new boiler installation. Everything from brand and type to factors such as where in the home it will be fitted and where in the country you live, will all affect how much it costs.

Here we look at everything you’ll need to consider.

How much do boilers cost?

Getting a new boiler fitted can cost anywhere between £1,549 and £3,500, which includes the price of the unit itself, the installation and warranty registration.

The type you choose will have a significant bearing on this cost. Combi, system and regular boilers all work differently and provide varying levels of power to the central heating system based on the requirement of a particular property.

Each type also requires different parts and fixtures, such as a hot water cylinder for system boilers and both a hot water cylinder and a cold-water storage tank for a regular boiler, all of which will affect the total price.

Combi Boiler

£1,549 - £3,000

  • Ideal for smaller homes
  • No hot water cylinder required - freeing up valuable cupboard space
  • No cold-water storage tank required - freeing up valuable loft space
  • Less pipework needed

System Boiler

£2,300 - £3,200

  • Ideal for homes with 1 or more bathrooms
  • Constant supply of hot water
  • No cold-water storage tank required - freeing up valuable loft space
  • Requires a hot water cylinder

Regular Boiler

£2,200 - £3,000

  • Ideal for houses with 2 or more bathrooms
  • Good option for areas with lower water pressure
  • Requires a hot water cylinder
  • Requires a cold-water storage tank

Combi Boiler


Combination boilers are often smaller than other central heating systems, as they combine two household functions into one appliance – hence the nickname, “Combi”.

This type heats water directly from the mains when a tap is turned on; so, there’s no need for a hot water storage cylinder, or a cold-water storage tank. They are the most popular for small to medium sized homes; due to taking up a small amount of space and having the ability to heat a small amount of water incredibly fast. 

We’d recommend this type for a 1-2-bedroom house with 1 bathroom.

System Boiler


A system boiler is very similar to a combi, as water is supplied from the mains and the heating components are built into the unit itself; the only difference is that a system requires a hot water cylinder to store the freshly heated water. 

Systems don’t need a cold-water tank, but they do require a hot water cylinder to be installed in the home which takes up valuable space. If you already have a system unit, they’re relatively quick to install. 

We’d recommend this type for a 3-4 bedroom house with 2 bathrooms.

Regular Boiler


A regular boiler creates the heated water for a central heating system and stores the rest into a hot water cylinder; If there’s enough hot water stored it can run multiple hot taps simultaneously.

This type requires a cold-water storage tank (often found in the loft) so they’re ideally suited for a larger home with more available space. If you have older radiators, we’d advise a regular boiler as a system or combi could potentially damage them due to high water pressure. 

We’d recommend this type for those with a 4-5-bedroom house, with 2+ bathrooms. 

Boiler on the Blink? 

Get a brand-new boiler from only £1,549!

With finance options available, enjoy the peace of mind that comes with a brand-new energy efficient boiler.

Just a few clicks and you could be getting:

  • Lower Energy Bills
  • Up to 10 years Manufacturer Warranty
  • A Free Smart Thermostat
  • Flue Kit worth £100 rrp
  • Magnetic Filter worth up to £100 rrp
Get a fixed price quote today

Combi Boiler Brands

There are a number of combi brands available to suit all budgets. These range from more affordable models from brands such as Ideal, to models that are a little more premium from brands including Worcester Bosch and Veissmann.

Differences which could influence the price you’ll pay include the hot water flow rate, the central heating output, the length of the manufacturer warranty and the dimension of the unit itself.

At Boiler Plan, we only install boilers that we trust and that we know can be relied upon to provide heat and hot water to your home when you need it.

Here are some of the boiler brands we offer:

Converting to a combi boiler

Swopping a gas combi for another combi is usually straightforward, with minimal impact on cost. However, switching from another type of system, such as a regular boiler to a combi, can involve a more complicated and expensive job.

Here’s a rough guide to what we charge for each job, whether you need a simple combi swap or are considering a different type of central heating system.

These prices are based on a semi-detached property, with 1 bathroom, 3 bedrooms, a boiler located on the ground floor and gas as a fuel.

  • Combi to combi swap: £1,904 - £2,291
  • System to combi conversion: £2,294 - £2,681
  • Back Boiler to Combi: £2,484 - £2,871
  • Regular Boiler to Combi: £2,294 - £2,681

All prices up to date as at 8/3/2021

Boiler Fuel Type

As well as the choice of boiler type, there’s also the choice of fuel to consider when working out the overall cost of the boiler.

Along with the price of the installation, the longer-term implications of different fuel types should be considered when choosing your heating system as these can have a huge impact on its real cost. The prices below are based on installation in a medium sized property.

Fuel Type Installation cost Running costs av.
Gas From £1,904 3.8p per kWh
LPG From £2,541 7.6p/kWh
Electricity £1,650 av. 14.4p per kWh
Oil (Heat only) From £3,214 4.81p per kWh

Installation costs taken from Boilerplanuk.com, except Electricity which is the current UK market average. Running costs based on UK average as of 9/3/2021.

As you can see, fuel type can have a huge influence both on the price of the initial installation and the longer-term running costs. For example, while electric combi boilers compare favourably to the cheapest gas combi in terms of installation, when it comes to heating costs you could be landed with an annual bill of around £4,000.

On the other hand, while oil-fuelled units provide reasonably affordable heating bills, the initial installation can be well over £3,000 in most cases. This is because of added factors such as the need to fit large storage tanks. However, for those living in remote areas and are off the gas grid, oil can be a more practical option.

What other factors affect the cost of a new boiler replacement?

As well as the type and brand you choose, there are a wide range of other factors that determine how much you’ll pay for a new central heating system.

The size of your house

While a small to medium-sized house with 1-3 bedrooms and one bathroom is ideal for a combi boiler, larger properties may require alternative systems.

A slightly more expensive system boiler is preferable for homes with more than one bathroom as its hot water storage cylinder can deliver hot water to multiple taps while also being economical to run.

While a regular boiler may be less economical to run and be more expensive to install due to the requirement of both a hot water and cold-water storage tank, the added power is a good option for properties with 2 or more bathrooms as well as those in areas with low water pressure.

The number of new fittings, fixtures and copper pipework

This is usually a factor when installing a boiler in a new location. For example, moving an existing boiler from a kitchen to the next room could cost you around £200. Moving it from the kitchen up to the loft, however, could mean forking out something closer to £600.

Complexity around your boiler flue

Flues that exit your house vertically through your roof, rather than horizontally through a wall, will add to the time it takes to fit a new boiler, which will increase the cost of the instal. You are required by law to have a new flue fitted as part of an installation. At Boiler Plan, every new boiler comes with a flue kit worth up to £100.

Boiler Warranty length

The length of your free manufacturer boiler warranty differs between models and can reflect the price you pay. For example, an Ideal Logic C24 Combi, which you can buy from £1,549, comes with a free a 2-year warranty, with the option of upgrading to 5 or 10 years.

For those looking at the medium to premium price bracket, most manufacturer warranties range from 5-10 years.

Here at Boiler Plan, all our Veissmann, Vaillant and Worcester Bosch boilers come with an amazing 10-year warranty.

As an accredited Worcester Bosch installer, we can provide a 10-year warranty for all Worcester Bosch boilers. This isn’t the case for the majority of installers who can only offer a 2-5 year warranty.


The installer you choose

Like any product, prices will differ depending on who the installer is and what packages they provide.

At Boiler Plan, our boilers start from just £1,549 and include:

  • Up to 10-year warranty
  • Flue kit worth up to £100 RRP
  • Magnetic filter worth up to £100 RRP
  • Web-enabled wireless thermostat
  • A chemical system flush 
  • Expert installation by a gas safe registered engineer
  • All fixtures, fittings and safety checks
Get a fixed price quote today

On what floor the boiler is located

This usually becomes an issue if you’re living in a flat and engineers require the use of scaffolding in order to work at height.

Where you live

Unsurprisingly, where you live in the UK can have a bearing on how much you’ll have to pay for your installation.

Again, you won’t be surprised to learn that London is the most expensive location. Irrespective of heating system type, the overall average price that companies charge for installation in the capital is £2,260, which is 8% higher than the national average.

What are the benefits of a boiler replacement?

One of the biggest reasons to replace your boiler is to save money on your gas bills, with some older models costing significantly more to run.

For example, if the boiler has dropped to 50% efficient, for every £1 you spend on heating your home, 50p is being wasted on lost energy.

Modern systems are now required by law to have a minimum efficiency level of 92%, meaning that upgrading to a new one will not only help the environment by reducing waste energy and emissions, but will also help cut down your heating bills.

Working out the age of your current boiler can also help work out whether it may soon need to be replaced. If your current one is over 10 years old you may find that you are calling out an engineer for repairs more often than you’d like, in which case it may be time to have it replaced.

How can I pay for a new boiler?

We understand that having to unexpectedly replace your boiler isn’t the most enjoyable way to spend your hard-earned cash. However, by taking up a payment plan with Boiler Plan, you can make the whole thing a lot more painless.

By making small monthly payments instead of one upfront sum, you could help take the sting out of replacing your boiler.

Flexible Ways to Pay for a New Boiler

Choose from:

You can still pay in full if you’d like as we accept all major Credit/debit cards. Deposit required.

Get a fixed price quote today

Boiler Costs

The price of a new boiler plus installation will range anywhere from £1,549 – £3,500; depending on how much work is required. We’d recommended you book a free home survey to get a Gas Safe engineer to come to your home and inspect how much work is required. When they’ve completed surveying your home, they’ll offer a no obligations quote that’s valid for 28 days, so you have time to research what’s best for you.

We hope that’s cleared up some confusion, and whatever your heating needs are, just know we're here to help on your journey to a warmer home.