If it is an exterior shed type storage room you can go as deep and wide as you want. If it is part of a home and attached it should be 12 inches wide and deep enough to get below the frost or freeze depth in your area. If freezing ground is not a problem than 12 inches deep should be fine.
Chat with our AI personalities
220 cubic metres.
However long and wide you want to dig it.
Deflation Hollows
A hole does not have dirt!
I depends on how wide the pan is and how deep it is.