A new boiler is a significant investment for any homeowner in the United Kingdom. Understanding the cost of a new boiler is essential before making a purchase decision.

In this guide, we will cover all the key aspects to consider when looking to get a new boiler and how they can factor in on the expected price.

The average cost of a new boiler in the UK ranges between £2,000 and £3,000, which typically includes both the boiler itself and installation costs. However, several factors can influence this price, such as:

  • The type of boiler you choose
  • The size of your home
  • Whether or not you’re replacing an existing boiler

The type of boiler is one of the most critical factors affecting the cost. There are three main types of boilers:

Combi Boilers: Compact and easy to install, combi boilers are the most popular choice in the UK.

System Boilers: Suitable for larger homes with multiple bathrooms.

Conventional Boilers: Less common and often a more expensive option.

Your home’s size also plays a significant role:

  • Larger homes require bigger boilers to heat effectively, which increases both the boiler cost and installation fees.
  • Smaller homes can opt for smaller boilers, leading to potential cost savings.

Whether you’re replacing an old boiler affects the overall expense:

  • If no replacement is required, you’ll only pay for the new boiler and its installation.
  • If replacing an old boiler, factor in disposal costs for the old unit and any additional installation expenses.

On average, a new boiler in the UK costs around £2,500, but this figure can vary based on the factors mentioned above. Be sure to consider these aspects when budgeting for your boiler purchase.


Upgrading your boiler is a significant decision. If you’re considering converting from a regular boiler to a combi boiler, here’s a breakdown of the costs involved.

A combi boiler is a modern, compact unit that provides hot water and central heating without requiring an open fire. It is powered by gas or electricity, making it ideal for smaller homes.

Also known as conventional or heat-only boilers. A traditional heating system that stores hot water in a cylinder and is fed water from a cold water storage tank.

The cost of materials for a conversion varies depending on the boiler size and type. Combi boilers are typically more expensive than regular boilers but offer greater efficiency in the long term. The material costs range from £1,500 to £2,500.

Installation costs also vary, as combi boilers are more complex and require additional time and labor. Expect installation costs between £500 and £1,000.

The total cost of converting from a regular boiler to a combi boiler is estimated to range between £2,000 and £3,500, including materials and installation.

Converting to a combi boiler can improve efficiency and save space. Weigh all factors carefully to ensure this upgrade is the right choice for your home and budget.


If you’re thinking about converting from a back boiler to a combi boiler, here’s what you need to know…

A back boiler is located behind an open fire, using the fire’s heat to provide hot water and central heating. While functional, they’re often inefficient and take up considerable space.

Converting to a combi boiler can offer many perks, including:

Improve EPC
Save Space
Modern Tech

The total cost of a back boiler to combi boiler conversion typically ranges from £2,500 to £3,500, depending on:

  • The size and age of your property
  • Structural work required to accommodate the new boiler

Converting from a back boiler to a combi boiler is a worthwhile investment for many homeowners. Contact us for more information and assistance in finding a qualified engineer.


When budgeting for a boiler replacement, consider the following factors:

The type of boiler significantly impacts the price:

  • Gas Boilers: Often the most expensive
  • Oil Boilers: Moderately priced
  • Electric Boilers: Typically the least expensive option

The size of your boiler should match your home’s needs:

  • Larger homes require larger, more expensive boilers.
  • Smaller homes can opt for smaller, more affordable units.

Installation costs depend on the complexity of the setup. Simple installations may cost a few hundred pounds, while complex projects could cost thousands.

Consider ongoing fuel costs when choosing a boiler. Gas and oil prices fluctuate regularly, so it’s important to keep an eye on these costs. Electric rates are often more stable, but they can still fluctuate from time to time.

Boilers in colder climates may be more expensive due to increased heating demands.

Replacing older boilers with newer, more efficient models can save money on fuel costs over time.

Higher-efficiency boilers cost more upfront but provide long-term savings on energy bills.


Choosing the right boiler involves considering cost, efficiency, and installation. A thoughtful decision ensures comfort, savings, and added property value. Whether replacing an old boiler or upgrading, understanding your options simplifies the process and saves money. 

For professional guidance and reliable service, don’t hesitate to reach out to our trusted experts who can help you find the best solution for your heating needs!

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