Underpinning House - Guess Timate

gsr600 | 15:23 Sun 21st Jul 2013 | Property

3 Answers

how much for the above on a mid terraced property (rear).
It seems like the rest have been done eons ago, but this 1 has not.
inlaws may purchase it & don't need a mortgage - both mid 70s.
Thanks.

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The Builder

Underpinning is one of those procedures that have acquired a lot of mystique. "Specialists" tend to big it up, when in fact, it's quite a simple operation requiring common sense rather than anything overly technical.

Usually, just a matter of digging a small section out from under the foundations. This is filled with concrete to the underside of the masonry. Then you simply move to the next section and repeat. By doing a section at a time, the building remains supported and stable.

Seven or eight excavations should be enough for a normal mid-terrace. Three to four thousand pounds should do it. Good access makes a difference.

Be prepared for some to make a drama out of it :o)

gsr600

Question Author

sounds simple, how deep would the concrete have to be.
Thanks Builder.

The Builder

That's where the cost may vary. Obviously, the existing footings were built on ground that isn't able to support the load. Excavation has to go down far enough to find the kind of solid bed that we would build off today.

What part of the country are you in?

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