Back Boiler Replacement

Hello,

I’m looking at buying a property which has a back boiler, what would the likely cost be of removing this and replacing it with a combi boiler? I appreciate costs will vary, depending on work needed.

The current back boiler is in the lounge, the water tank is in the bedroom directly above. We’d like the combi boiler to be placed in the kitchen.

We’re based in Hampshire. Many thanks for any advice.

Asked by Sara on 1st Sep 2025
Expert Trade Answers
"Hello I hope your well depending on what needs doing if you your looking around 3-5k all together
I hope this helps"
Answered on 1st Sep 2025 - Member since Feb 2018 - report
"Hi. Cost £4000 to £6000. Depending of boiler make. In my opinion Vaillant or Worcester Bosch."
Answered on 1st Sep 2025 - Member since Dec 2024 - report
"Around 3=4k or an extra 500 ontop off a replacement boiler depending on which boiler you choose."
Answered on 1st Sep 2025 - Member since Oct 2022 - report
"Hello,
I would estimate : 4K - 5K .
It obviously depends on the system size and which quality of boiler you are looking to replace the BBU with.
I hope this helps."
Answered on 1st Sep 2025 - Member since May 2024 - report
"Hi Sara,
As you mentioned it definitely does depend on a few factors like the current setup, location of the new boiler, and any additional work needed. That said, you’d generally be looking at somewhere between £3,000 and £5,000 all in — that includes the removal of the existing back boiler, the new combi boiler, parts, and labour. All the best"
Answered on 1st Sep 2025 - Member since Jan 2025 - report
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