How Much Should You Expect a New Boiler Quote to Cost in the UK?

You don't need a new boiler until you do, and by then, it's urgent. Maybe yours is leaking or has failed its last service. Maybe you're bleeding money on energy bills and still waking up cold.

If your boiler is over ten years old and you've patched it more than once, it's probably time. And if you've been told you need a new one, but have no clue what a fair price looks like, this boiler cost complete guide is for you.

We're breaking down what you'll pay in the UK and why the quote you get might be hundreds higher (or lower) than you expected.

Boiler cost complete guide: How much does a new boiler in the UK cost?

According to Checkatrade's 2025 figures, here's a snapshot of what you'll likely pay for the unit and installation:

These prices do not include extras like smart thermostats, power flushing, or upgrades to pipework and flues. Expect your quote to go up if your home needs major adjustments or you're switching boiler types (from a system boiler to a combi, for example).

Choose the right boiler size, not just the cheapest.

Boiler size is measured in kilowatts (kW), which tells you how much heating power it can deliver. Get it wrong and your system will either struggle to keep up or waste energy.

• 12 to 24 kW is best for flats or small houses with one bathroom and up to 10 radiators

• 24 to 35 kW is suited for medium-sized homes with two bathrooms and 15 radiators

• 35 to kW is needed for large properties with three bathrooms and 20+ radiators

Get a clear quote from WPJ Heating.

Too many people get hit with surprise boiler costs because the quote from the installer didn't tell the full story. That's why you need to choose a company that provides a complete boiler cost guide. WPJ Heating can give you detailed pricing upfront, with no vague ballpark figures and no last-minute padding.

To get a new boiler quote or to book a visit, head to WPJ Heating's website. You can also call 020 4572 5314 if you have questions or need help planning your install.

About the Author:

In 2002, Will Hawksley and PJ Luard established WPJ Heating with the ambition of attaining the foremost position among heating companies in London. The two individuals deliberated on the complexities of plumbing and boilers before deciding to collaborate. At present, WPJ Heating has expanded its staff to 26 members. Their cadre of skilled professionals encompasses gas engineers, plumbers, a specialised team for drainage and pressure jetting, versatile bathroom fitters, electricians, and decorators.