New Basement

[N. Thornton]

Hi

This is right at the beginning of the thinking about it process, I'm looking for some kind of rough ballpark figures for what it would cost to put a 200 sqft basement in under a house.

Regards, NT

[dp]

Quite a lot if you have to rebuild the house.

It is only feasible if your foundations are deep enough. Normally foundations are only deep enough to lower floors by a foot or two.

[Gin Smith]

saw a programme about this - alot of Londoners are doing this as they can know longer build up or outwards.

Take a look at

[Dave Plowman (News)]

I'd guess this involves converting an existing cellar which most Victorian houses have.

[Rick Dipper]

I would guess you need to jack up the house (all of it), dig a big hole underneath, put in foundations & walls, then drop the house back on top. Sort of soulds like a big pile of money to me.

Rick

[David]

In article , N. Thornton writes

I wonder if you can do it with a deep underpinning style method, underpinning is done on a 1 metre hit and miss basis, why can't you go down about 8'? before trying it on my house though I would like to see somebody else try :-) or use minipiles they work well but are a specialist application, depends how much money you want to spend and on the construction of your existing house

[N. Thornton]

From: Gin Smith ( [e-mail])

From: David [e-mail] (David [e-mail])

thats what I was thinking, underpinning, but doing it repeatedly to get the required depth. Once full depth basic support is in place, it would then be poss to add full height walls with steel in to reach the strength required for long term stability.

The existing floor could simply be replaced.

On the face of it there looks like potential here. The LBC linked to above says typical costs 70-100K, but they look like a premium price building company, with prices to match.

There might even be room for as much as about 500 ft2 down there - and that would be seriously useful.

Thanks, NT