Foundation depth for extension?
i am considering an extension and want to know the depth required for my foundations. it is a small extension replacing a consevatory.
Foundation depth for extension?sunshineAt least a spits worth, down through the top soil, to hit the hard compacted stuff. I think. Best consult a library book on the subject or ask a builder.
Foundation depth for extension?star theater opera theater
minimum depth an inspector will look for is 3feet or 900mmx600mm across|||Firstly building regs will make you put it in deep enough to support 2 storey, even if you are currently building it single storey.
It depends on the ground, but you'll likely be looking at 600mm from the ground level to the top of your concrete footings - so you need to go deeper to pour 200mm concrete.
Could be more, depends on the substrate. I've done one just last year at 600mm but in previous years I've been 8 feet down !
building regs person in the council planning department will tell you. They are human and polite, and generally very happy to help.
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