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How much does a new boiler cost?

There are various factors that influence the cost of a brand-new boiler. The size of your home, the type of boiler you need or which brand of boiler you’d prefer. All have costs associated with them, and here at Boiler Plan we want to help alleviate the confusion.

Affordable powerful boiler for bigger home

How big is your house?

There’s a simple rule when it comes to boilers, “The bigger the house the more powerful the boiler”.

A bigger house will often have more than one bathroom and will usually have multiple radiators connected to a central heating system – these factors will always affect how much power your boiler will require to run efficiently. 

As an example, if you lived in a 2-bedroom house with 1 bathroom and up to 10 radiators, a 24-27Kw* boiler will be more than enough power to heat your home efficiently. As another example, if you lived in a 5-bedroom house with 2 bathrooms and over 20 radiators, then you’d be looking at a powerful boiler of 35-42kw*.

Power will seriously affect the price of a boiler – just remember the more powerful the boiler, the more expensive the price.

*Boiler power is measured in Kilowatts (Kw) so the higher the Kw the more powerful the boiler. 

Types of boiler combi regular system boilers

What type of boiler do you need?

We’re always asked what the best type of boiler is, but the answer isn’t quite as simple as you’d think. The best type of boiler is one that’s efficient for your home – meaning you’ll be using less energy to provide the best heating performance and save more money on your gas bills.

The best type of boiler for one home may be incredibly inefficient for another. Here’s a quick run-through of the different types of boilers, and which homes they’d be perfect for.

UK worcester bosch most popular boiler combi

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 of boiler heats the 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 boiler 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 of boiler for a 1-2-bedroom house with 1 bathroom.

System worcerster bosch boiler hot water cylinder

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 boiler itself; the only difference is that this type of boiler requires a hot water cylinder to store the freshly heated water. 

System boilers 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 boiler, they’re relatively quick to install. 

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

Affordable worcester bosch Regular boiler heat only boiler

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 of boiler also 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 damage them due to having high water pressure. 

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

Combi Boiler

£1,600 - £3,200

  • 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 - £4,000

  • 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

£2,000 - £3,600

  • Ideal for houses with 2 or more bathrooms
  • Good option for areas with lower water pressure
  • Required hot water cylinder
  • Requires a cold-water storage tank
Worcester Bosch Ideal Baxi Vaillant Potterton Boiler Plan boiler brands

Brand and model of the boiler?

There are a number of boiler manufacturers in the UK such as Worcester Bosch, Vaillant, Ideal, Baxi, Potterton and even ourselves – all of which offer a similar range of boilers but often differ in price. Sometimes the price is in relation to having a perfect reputation – but you could pay a higher price just for a brand name.

As price is a big deal for most people, there’s always the option to purchase a budget boiler – but they will often offer shorter life spans, shorter warranties and reduced levels of customer support. Whilst they are cheaper to install, they tend to be more expensive to maintain and less efficient to run in the long term.

Below are a sample of boiler companies we work with and would highly recommend. Many of which offer a 10-year warranty, so there’s no reason to pay for expensive boiler cover, and you’ll have total peace of mind knowing your boiler will be guaranteed for the next decade.

Worcester Bosch is the UK’s most loved boiler brand, and their range of Worcester Bosch Boilers has led them to receive the coveted 'Which? Best Buy' awards for nine years running. Worcester have also received a Royal Warrant for supplying their boilers to Her Majesty The Queen’s Sandringham Estate.

As one of Europe’s leading heating technology manufacturers, Vaillant boilers have been setting heating standards for over 140 years. Vaillant products feature high energy efficiency ratings, low emissions, and have an excellent reputation for performance, quality and reliability.

We know boilers better than anyone – that’s why we manufacture our own - Erik31HE. Using only the best materials and parts, to make it more reliable. But quality doesn’t just start with our product. It starts with our customer service and ends with our aftercare. If we can’t repair your boiler within 48 hours of call out, we’ll replace it or offer you a full money-back guarantee. We’re so confident in Erik that we’re the ONLY company to offer this guarantee. If Erik31HE doesn’t make you smile, we’ll give you your money back.

Ideal boilers are reliable and competitively priced products. Ideal lead the industry in setting new standards and challenging technological boundaries. With over a century of central heating manufacturing experience, Ideal remains at the forefront of the domestic and commercial heating markets.

Baxi boilers are high-efficiency boilers that are straightforward to install, maintain and service – they’re also incredibly easy to use. Baxi’s ethos of pride, passion and positivity – combined with reliability, respect and innovation – has helped define their company.

All Potterton boilers use the latest heating technology to ensure they all meet the energy efficiency requirement and are environmentally friendly. Their boilers have a reputation for being extremely dependable and easy to use – demonstrated by their seven million customers across the UK.

Affordable payment plan finance options

Ways to pay for your new boiler

The cost of a new boiler will always differ depending on how you choose to pay for it. 

A cash price will always be the cheapest option, but it requires a large amount of money suddenly. We recognise most people won’t have a lump sum readily available, which is why we offer various payment plans. This makes a brand-new boiler much more affordable, but it does come with added interest; so, you will pay more in the long run. 

This is ultimately down to personal choice; either pay a lump sum in one go with the best price or start an affordable monthly payment plan and pay more over a set course of time.  If you do apply for a finance plan you’ll be subject to a credit check, so if you have bad credit you’ll likely be rejected and it will affect your credit rating – so only go for this option if you know you’ll be accepted.



The cost of a new boiler really does depend on a range of factors. 

Here at Boiler Plan, we understand how precious the pennies are for many people, and a new boiler is often associated with a huge lump sum at a very inconvenient time. By offering monthly payment plans we can open the market to those who in the past couldn’t afford an A-rated energy efficient boiler; those who instead would have bought an inefficient budget boiler as a cheaper option but would have been stung with a pricey gas bill. 

When it comes to either constantly repairing your old boiler or buying a new one, then it’s always best to replace the boiler every decade to make sure your heating is completely energy efficient. 

To conclude, we think the price of a new boiler plus installation will range anywhere from £1,700 – £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 then offer a no obligations quote that’s valid for 30 days, so you have time to research what’s best for you.

We hope that’s cleared up some confusion, and whatever your boiler needs are, just know Boiler Plan is here to help you on your journey to a warmer home. 

Think of us as the boiler experts who care.

Don’t hesitate to give us a call on 0800 61 22 302 or get an online quote today

*Representative Example: Based on a Ideal Logic C30 Combi Boiler with a 2 year warranty and cash price of £1,758 less a deposit of £879 = loan amount of £879. Repayable by 120 monthly payments of £9.65. Total Charge for credit is £278.65. Total Amount Repayable is £2,036.65 (which includes the deposit of £892.50). A deposit is not mandatory, with no deposit contribution your monthly payments over 120 months would be £19.29. Total charge for credit is £557.29 and the total amount repaid (including interest) is £2,315.29. The interest rate is 5.9% per annum fixed. Subject to status.

ˆInstallation within 48 hours, if you have no heating and no hot water, from the point you accept your boiler quote and pay your deposit payment or accept the Terms and Conditions of your finance agreement. Subject to engineer availability, your location and urgency of boiler installation.