Are you thinking about relocating your combi boiler, but are wary of the costs?

If your combi boiler is in in awkward place (like a bedroom cupboard), or you’re thinking of renovating your home and want to make the most out of your new space, relocating your combi boiler could be a wise move. And it’s really not as difficult as you think!

However, it could involve a few extra costs. A lot of customers who come to me want to get a better idea of what they can expect to pay before they go any further.

Which is understand. Although, each home is so different, that it’s going to be really tough for me to give you an exact figure without looking at your home first.

As an experienced heating engineer, what I can do it give you an idea of the average costs – along with the factors that can affect them. That way, you can be a bit more prepared!

The average cost to relocate a combi boiler

When looking at average costs of relocating combi boilers, we might as well say: “How long is a piece of string?”

This is because, like I said above, every home is so different. And will have different requirements in terms of boiler specification you’ll need, too. That’s why it’s really hard to judge off the cuff, as many factors will affect the overall price you pay.

Saying that, we can look at the most popular boiler we sell, the Worcester Bosch 30i. It’s our bestselling boiler because it suits most average homes. So, if we were looking at a very, very straightforward relocation with a new Worcester Bosch 30i, you could expect to pay around £2,500 – £3,000.

Factors that can affect your overall costs

There are many things that can affect the cost you pay to relocate your boiler. Here’s a rough guide of the prices you can expect to pay for some of the most

  • Cost of boiler unit – £750 – £2000
  • Boiler flue – £80 – £120
  • Extension flue pipe and flue bends (if required) – £40 per metre
  • Magnetic central heating filter – £110
  • Boiler controls – Anywhere between £70 – £600
  • Pipework and fittings (screws, raw plugs, sand, cement, dust sheets) –  £300-£600
  • Rubbish removal from the site by a Sepa registered contractor- £80-£100

There’s also the cost of running upgraded gas supply pipes and running a condensate pipe to a drain, and the cost of coring a new hole for the flue – which will be required when relocating your combi boiler.

On top of this, don’t forget to add VAT, not to mention the cost of each engineer’s labour, training, van, tools and overheads for your chosen heating company to cover. Also the company obviously has to make a profit.

How you can save on costs

The good news is, there ARE ways you can save on costs when getting a new boiler. Even if it does mean relocating it! In fact, I’ve written an entire blog on how you can save money on your boiler installation, so I’d recommend checking that out.

You could strip out the tanks and pipework yourself, as long as your boiler has been decommissioned and disconnected (and the tanks have been drained). It could save you an entire day’s labour.

Another thing you could do (if you know how and have the right equipment) is core the flue hole yourself. You could even rip out the old flooring yourself, and dispose of all your own waste!

Advice from an experienced engineer

When relocating your boiler, it’s common sense that you’ll want to know it’s going to be in an ideal location for servicing. You’ll also want to ensure you’re not waiting five minutes for the hot water to reach your taps. Not everyone thinks about these things first.

Your chosen engineer should be able to help advise you further. They might even come up with ideas for relocating your boiler that you hadn’t even thought of yet!

We had a recent client over in Rankin Drive, who wanted to relocate his boiler to a different part of the house. He ran pipes through his bathroom, spending a lot of money on builders, and bought and fitted all of his own radiators and bathroom suite.

He was so well organised. All he wanted us to do was to fit the new boiler, and run the pipework to the radiators, and connect them up, as well as take the hot and cold supplies to the new bathroom and en suite etc.


I hope this blog has helped give you a better idea of how much it’ll cost to relocate your combi boiler. I’m sorry the answer isn’t very clear-cut, but the cost will differ based on your own circumstances and set-up. However, the best thing to do is speak to your chosen engineer, who can help advise you further.

There may even be some ways you can help save on costs, by doing a wee bit of labour yourself!

Do you have any more specific questions about relocating your combi boiler? Let me know in the comments. I’ll be happy to help!