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Family room extension cost in 2026
We are in a detached house and have some space down the side which I think it'd be possible to use to add a metre or so to the lounge area. How much does a family room extension like this cost? Just need an average number at this point from the pros!
Expert Trade Answers
"So to dig out foundations Concrete build put on Roof timber and tile Totton dab plastering electrics, plumbing Screed floor fit Windows £2000 a square meter"
Answered on 3rd Feb 2026 - Member since Jun 2022 -
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"Depending on your location. But normally £2,500 + vat per square metre"
Answered on 3rd Feb 2026 - Member since Jan 2026 -
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