The cost: a concrete slab could easily cost 3 to 10 times the amount of a wood floor. depending on if you do it yourself or hire someone. your shed is no longer portable. no longer portable. not being portable is important for 2 reasons. you can’t move your shed if you need to. and permanent structures are often treated differently by the law.. Concrete for shed base – this concrete for shed base ideas gallery was upload on october, 14 2019 by cleveland koch. here latest concrete for shed base gallery collection. download other design about concrete for shed base in our other reviews. click on gallery to tap concrete for shed base ideas in high resolution. concrete for shed base gallery. A concrete block shed should be built on a slab or footer foundation. foundations should be level, square and built to appropriate depths for the location's frost line. a good foundation will eliminate many of the problems associated with building a concrete block shed..