How Much Does a New Boiler Cost in 2026?
If your boiler’s on the way out, the first thing you want is a straight answer on price — not a form to fill in before anyone will tell you. So here it is: a new combi boiler typically costs between £1,800 and £3,500 fully installed in 2026, with the median coming in around £2,300. Below is the full breakdown — by boiler type, by brand, and what pushes the price up or down — using real 2026 UK pricing, so you know what a fair quote looks like before anyone comes round.
The Quick Answer
For the most common job — swapping an old combi for a new one — here’s where the 2026 numbers land:
- The typical range is £1,800 to £3,500 installed, including the boiler, labour and VAT.
- Recent industry data puts the median quoted price at around £2,300, and real-world installed averages at roughly £2,240.
- Most straightforward swaps are quoted between about £2,150 and £3,000, depending on the model, warranty and controls.
So if you’re quoted somewhere in the low-to-mid £2,000s for a like-for-like combi swap, that’s squarely in the normal range. Much below £1,800 or well above £3,500 for a simple swap is worth asking questions about — either way.
Cost by Boiler Type
The biggest single factor is what kind of boiler you’re fitting and whether you’re changing type. Rough 2026 installed prices:
| Job | Typical fitted price |
|---|---|
| Like-for-like combi swap | £1,800 – £2,800 |
| New combi with full pipework | £2,400 – £3,800 |
| Regular → combi conversion | add £700 – £1,400 on top |
| System boiler + cylinder upgrade | £3,800 – £5,500 |
A combi is the cheapest and most common choice for smaller homes — no tanks, hot water on demand. A system boiler with a cylinder suits larger homes with more than one bathroom, and costs more because there’s more kit and more work. And changing type — say converting an old regular boiler with a loft tank and cylinder over to a combi — adds labour and pipework, which is why it lands £700–£1,400 higher.
Cost by Brand
Brand and warranty make up a big chunk of the difference between a cheap quote and a premium one:
- Budget and mid-range (Baxi, Ideal): roughly £1,800–£2,600 installed. An Ideal Logic+ starts from around £1,900; a Baxi 200 from about £1,800.
- Premium (Worcester Bosch, Vaillant): roughly £2,500–£3,500 installed. As a guide, a Worcester Greenstar 4000 runs about £1,600–£2,100 for the swap, an 8000 Life £2,300–£3,100.
Premium brands usually come with longer warranties (often 10–12 years if fitted by an accredited installer), which is a big part of what you’re paying for. On a boiler you’ll keep for 12–15 years, that peace of mind is often worth the extra — but a well-fitted mid-range boiler is a perfectly sensible choice too.
What Affects the Price
Two quotes for “a new boiler” can differ by over a thousand pounds for good reasons. The main ones:
- Boiler type and brand — as above, the single biggest lever.
- Complexity. Moving the boiler to a new spot, rerouting the flue, removing an old back boiler, or upgrading tired pipework all add labour. A complex job can reach £6,000 or more.
- Controls and extras. A smart thermostat, a magnetic system filter and a chemical flush are often bundled in — useful, but they add to the total.
- Labour. A Gas Safe registered engineer typically charges £300–£600 a day, and a like-for-like swap is usually a single day’s work.
- Where you live. Prices tend to run higher in London and the South East than in much of the rest of the country.
Always use a Gas Safe registered engineer
By law, anyone working on your gas boiler must be on the Gas Safe Register. It’s not just a box-tick — a badly fitted boiler is a genuine safety risk and can invalidate the warranty. Ask to see the card, and check the boiler is registered with the manufacturer and with Gas Safe after the job.
How to Keep the Cost Down (Without Cutting Corners)
- Get two or three fixed-price quotes. Not day rates — a fixed price for the whole job, so there are no surprises. It’s the single best way to know you’re paying a fair rate.
- Right-size the boiler. Bigger isn’t better — an oversized boiler costs more to buy and run. A good engineer sizes it to your home and hot-water needs.
- Don’t over-spec. A solid mid-range boiler, well fitted, beats a premium one fitted badly. Pay for the fit as much as the badge.
- Protect it from day one. A magnetic filter and the right inhibitor keep sludge and limescale out of the new boiler — especially important in hard-water areas, where scale shortens a boiler’s life. Cheap insurance on a £2,000+ investment.
- Check the warranty terms. Longer warranties usually require an annual service — factor that in, and keep the paperwork.
Repair or Replace?
If your boiler is under about 8 years old and the fault is a single part, a repair is usually the sensible call. But once a boiler is 12–15 years old, parts get scarce and expensive, efficiency drops, and you can end up paying for repair after repair. At that point, putting the money towards a new, efficient boiler with a long warranty often works out cheaper over the next few years. If you’re weighing it up, a Gas Safe engineer can tell you honestly whether yours is worth saving.
The Short Version
A new combi boiler in 2026 costs most people £1,800–£3,500 installed, with around £2,300 being typical for a straightforward swap. System boilers and boiler-type conversions cost more; budget brands cost less; and complexity, controls and where you live move the number around. Get two or three fixed-price quotes from Gas Safe engineers, size the boiler properly, and protect it with a filter and inhibitor — and you’ll get a fair price on a boiler that lasts.