Boiler Cost Guide: What You’ll Pay for a New Boiler

If you’re thinking about a new boiler, the first question is always the price. The truth is, boiler cost isn’t just the tag on the unit. It includes the model, the fuel type, the size of your home, and the labour to hook it up safely. Knowing the pieces helps you avoid surprise bills and pick the right system for your budget.

Buying and Installing a Boiler

Boiler price can swing from £1,200 for a small electric unit to over £5,000 for a high‑efficiency combi gas model. A good rule of thumb: the bigger and more efficient the boiler, the higher the upfront cost, but you’ll usually save on fuel later. When you add installation, labour typically adds £500‑£1,500 depending on how complex the job is. If you need new pipework, a grant, or a new flue, expect the total to climb.

Don’t just grab the cheapest quote. A qualified heating engineer will check the size of your property, the number of radiators, and the hot‑water demand. An undersized boiler will struggle, while an oversized one wastes energy. Ask the installer for a load‑calculation report – that’s the best way to prove you’re getting a correctly sized unit.

Ongoing Service and Repair Costs

A yearly boiler service isn’t optional; it keeps the system safe and efficient. In 2025 the average service fee is £80‑£120. Some companies bundle a service with a 12‑month warranty, which can be a good deal if you’re wary of repair costs later.

When a boiler breaks down, repair prices depend on the fault. Replacing a faulty pump or a pressure valve usually runs £150‑£300. More serious issues like a heat‑exchanger leak can cost £500‑£1,000. If the repair bill tops 50% of a new boiler price, most homeowners choose replacement instead.

Fuel costs also play into the overall expense. A modern condensing boiler saves up to 30% on gas compared with older models. If you switch from oil to gas, factor in the conversion cost – typically £1,000‑£2,000 – but the long‑term savings often outweigh it.

Here are three quick ways to keep boiler costs down:

• Schedule a yearly service; it catches problems early and maintains efficiency.
• Upgrade to a high‑efficiency model if your current boiler is over 10 years old.
• Check for government or local grants that can offset installation or upgrade costs.

Bottom line: the total cost of a boiler includes the unit, installation, annual service, and any future repairs. By understanding each piece, you can compare quotes realistically and avoid hidden fees. If you’re ready to get a solid estimate, contact a certified heating engineer for a free site visit. They’ll give you a clear price list and help you decide whether to repair, replace, or upgrade.