For the vast majority of sheds and storage buildings, gravel is more than good enough. It drains well, stays stable through freeze-thaw, and costs a fraction of a poured slab.
Concrete makes sense for garages where you're driving vehicles in and out, heavy workshops with significant equipment, or any building you plan to finish out as a permanent workspace. If you're storing lawn equipment, seasonal gear, or general household overflow, save the money. Gravel does the job.



