05:16PM | 01/01/06
Member Since: 12/31/05
2 lifetime posts
I have a older 2 story farm house with a 4 foot crawl space, the footer is just below freeze line. I want to add on a new 1 story addition with a basement under it to the existing house.The wall and foundation that I want to attach to is NOT a load-bearing wall. How close to that wall can I safely dig to put on a new addition with a basement? I'd prefer not to disturb the existing wall and foundation as the starting wall for the basement. Can I lay a new basement wall next to it?

Glenn Good

06:45PM | 01/10/06
Member Since: 09/10/03
314 lifetime posts
Generally speaking if you envision a 45 degree slope away from the bottom of the foundation, that is the area you should NOT disturb. If you plan to dig down below the bottom and next to an existing foundation closer than the 45 degree slope under it would allow you will need to shore it up first. This would require the direction of a structural engineer.

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