How much does a new boiler cost? An honest guide

If you're asking this question, your boiler is probably old, noisy, or costing more to run every winter. The frustrating part is that most firms won't tell you a price until they've sat at your kitchen table. Here's the honest picture.

The short answer

Most straightforward boiler replacements in the UK land somewhere between £1,500 and £3,500 fitted, depending on the boiler, your home, and what needs changing. A like-for-like combi swap sits at the lower end. Moving the boiler to a different room, converting from a system boiler to a combi, or a larger house needing a bigger output pushes it up.

Rather than guessing, you can get a fitted price for your home in 90 seconds, answer a few questions and see three priced options straight away. No sales visit, no obligation, and nothing to pay online.

What actually changes the price

The boiler itself. Brands and models vary a lot. A bigger house with more bathrooms needs a higher output, which costs more. Premium brands carry longer guarantees, sometimes worth it, sometimes not.

Like-for-like or a change? Swapping a combi where the old one hangs is the simplest job. Moving it to the loft or garage means new pipework and flue. Converting from an old system boiler with tanks to a combi is a bigger day.

What comes with it. A magnetic filter, chemical flush, new controls and a carbon monoxide alarm should be in any decent quote. If a quote looks cheap, check what's missing.

Where you live matters less than you'd think. Labour rates vary by region, but the biggest price differences come from the job, not the postcode.

Why old boilers quietly cost you money

A boiler over 10–12 years old can be 15–25% less efficient than a modern condensing one, that's real money on every gas bill, plus the repair bills that start stacking up. If you've paid for two or three repairs in the last couple of years, replacement usually wins on maths alone.

How to compare quotes fairly

Get every quote as a fitted price, in writing, listing the boiler model, guarantee length, flush, filter and controls. Then compare like for like. A "cheaper" quote missing the flush and filter often costs more within a year or two, sludge is the number one killer of new boilers.

How it works with us

We do it the modern way, without losing the local bit: answer a few questions about your home, see three fitted prices instantly, and if you like one, Rich calls you to confirm the details and books a free survey. The price is checked by the engineer who'll actually fit it, not a call centre.

Get my instant quote or call 07969 110679, we're a Gas Safe registered, two-engineer firm covering Eastleigh, Winchester, Southampton and everywhere in between, trading since 2009.