Side extension cost

The_One

The_One

The_One

Soldato
Joined
27 Dec 2003
Posts
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Anyone had an extension built over top of the garage like where i've highlighted?

What was the rough cost? I know it will vary from what area of uk you are in etc just want an idea??

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Looks similar to what I was wanting, but a mine was a little bigger. My quotes was coming in at 50k+ eye watering and something I was not prepared to pay. I had complications as it needed under pinned and part of the existing wall was single skin.
 
Depends where you are greatly I'd say anything from 22k to 33K in my opinion would be pretty reasonable. that just be costs to the builder/contractor though.
 
psd99 said:
Depends where you are greatly I'd say anything from 22k to 33K in my opinion would be pretty reasonable. that just be costs to the builder/contractor though.
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That's good to know, looking at doing a side extension (ground would be roughly 3.5mx4.5m and 1st 3.5x3.5ish) with two walls allready existing instead of one, think filling in a corner. Hoping it'll be more this price bracket and not the 50k+
 
ash_scotland88 said:
That's good to know, looking at doing a side extension (ground would be roughly 3.5mx4.5m and 1st 3.5x3.5ish) with two walls allready existing instead of one, think filling in a corner. Hoping it'll be more this price bracket and not the 50k+
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It really depends on each builder/contractor and the size of the area.

when I did my extension I paid 22K whereas my friend paid 32K for almost the same area. It will vary for sure.
50K is very high in my experience but there will always be people who will be willing to pay this high rate.
 
Im about to have the same type of extension on my house - starts next week. I am having two extra bedrooms over my garage/kitchen. Our cost is going to be around 33-34k ish and that includes a new boiler as our curent one is 15 years old and will be cheaper to put a new one in, instead of relocating the current boiler. That price excludes all the drawing fees, planning stuff and all the other little bits. Get your foundations checked first as that will have a massive impact on the cost.
 
That's pretty much exactly my house there with the rear kitchen extension.

For me it's not worth it as I'm moving soon and it will just about break even with a load of risk. Totally different if you're living there indefinitely. Problems you may have are the likely hood of building control wanting you to underpin the existing foundations and the party wall agreement you'd need.

If we didn't have the rear extension it would be a more economical option to demolish the garage, rip out the foundations and slab and start again.

Cost wise £30 - 40k to start again with a simple build or anything up to £120k for a wrap around with a load of steelwork doubling the size of the house which my neighbour has done. Don't forget 20% of the cost is just VAT.
 
As above the governments share will drive you bonkers 20% vat on home improvements like this is just cruel in our housing market!
 
£2k per square/m for a ballpark figure, £1500-1750 if you project manage it yourself.
 
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