How Much Is a New Boiler? A Complete Guide to Boiler Costs in 2025

paul millz
May 28
2 min read

Updated: May 29

How Much Is a New Boiler in 2025?

If your current boiler is on the blink or your energy bills are through the roof, it might be time to invest in a new boiler. But how much does a new boiler actually cost in 2025? The answer depends on several factors—from the type of boiler you choose to the complexity of the installation.

In this guide, we’ll break down:

Average costs of a new boiler in 2025
Different types of boilers and their prices
Installation costs and hidden fees
How to save money on your boiler replacement

Average Cost of a New Boiler in the UK (2025)

Boiler Type	Boiler Cost	Installation Cost	Total Estimated Cost
Combi Boiler	£600 – £1,500	£500 – £1,000	£1,100 – £2,500
System Boiler	£800 – £2,000	£700 – £1,200	£1,500 – £3,200
Conventional Boiler	£900 – £2,500	£800 – £1,500	£1,700 – £4,000+

Types of Boilers and Which One is Right for You

🔥 Combi Boilers

Best for: Small to medium homes with one bathroom

Pros: Compact, energy-efficient, no need for water tanks

Cost: £1,100 – £2,500 (installed)

🌡️ System Boilers

Best for: Homes with multiple bathrooms

Pros: Good water pressure, no need for cold water tank

Cost: £1,500 – £3,200 (installed)

🏡 Conventional Boilers

Best for: Larger homes with existing heating infrastructure

Pros: Good for high hot water demand

Cost: £1,700 – £4,000+ (installed)

Factors That Affect the Cost of a New Boiler

Boiler Brand: Premium brands like Worcester Bosch or Vaillant typically cost more but offer better warranties and efficiency.
Boiler Size (kW rating): Larger homes need more powerful boilers, which can increase costs.
Your Location: Prices vary across the UK. Installation in London may be more expensive.
Complexity of Installation: Switching boiler types or moving the boiler location increases labour and material costs.
Extra Work Required: Upgrading pipework, adding smart thermostats, or flushing your system can add to the total cost.

Hidden Costs to Watch Out For

Boiler relocation: +£300–£800
Upgrading radiators or pipework: +£200–£1,000
Disposal of old boiler: +£50–£100
Smart thermostat: +£100–£250

Always request a detailed quote to avoid surprises.

Tips to Save Money on Your New Boiler

Compare quotes from at least three Gas Safe registered engineers.
Look for grants or government schemes like the Boiler Upgrade Scheme.
Bundle installation and smart controls to save in the long term.
Choose the right size boiler for your home to avoid overpaying on energy.

Final Thoughts: Is a New Boiler Worth the Investment?

A new boiler can cost anywhere from £1,100 to £4,000 or more, but it’s a long-term investment in comfort, efficiency, and lower energy bills. Choosing the right boiler and installer can save you hundreds each year and reduce carbon emissions.

Need a boiler quote?

Get a free, no-obligation quote from Plumb Rite, your trusted local installer today, and find the best deal for your home and budget.

Tel: 01384 293044

Email: plumb.rite@hotmail.co.uk

FAQs

Q: How long does it take to install a new boiler?

A: Usually 1–2 days, depending on complexity.

Q: Should I repair or replace my boiler?

A: If your boiler is over 10 years old, frequently breaking down, or inefficient, replacement is often more cost-effective.