Cost for an extension

29 replies

Trytosmilefor2025 · 23/05/2025 10:07

I am in the south east and have been looking at extending my kitchen for a while. The plan is just to add a standard 3 X 5 m extension at the back. Quotes are coming at between 40-50k. Most likely we won't get this money back any time soon, but it will make a massive difference to the way we use the house. I have also posted before about conservatories. That will be around 25k, but not open to the kitchen etc and given the price I think it might be best to pay a bit more for a proper extension....is this reasonable? Any thoughts?

OP posts:

Notmyreality · 06/01/2026 17:03

Trytosmilefor2025 · 23/05/2025 14:01

I did have quotes initially for 80k (clearly someone who wasn't motivated to do the job) so I am thinking that's fairly reasonable. Although we bought the house at the top of the market and we will unlikely make that money back...if we extend than really we need to stay put for the long run to make it worthwhile.

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I think you’ll find 80k is the right ballpark and I’d be worried at 50k.

JG24 · 06/01/2026 17:39

Conservatories are the devils work. Get a proper extension!

Original poster

Trytosmilefor2025 · 06/01/2026 20:02

The extension cost around 45k all in, but that was fairly basic and we didn't move kitchen cabinets and turned that to a bar/peninsula once the wall was down. We effectively more than doubled the kitchen size though and we have a very large space for a kitchen dinner.

OP posts:

Doris86 · 06/01/2026 20:05

MrsPositivity1 · 23/05/2025 14:54

We’ve just done our kitchen, no extension but knocked a small utility wall down to make kitchen bigger and it has cost around £55k

Must be a big kitchen! We did similar and it cost us £10k all in.

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