Well I know that in alameda county I can build a shed that is 120 sq ft. without a permit but the problem is I would like a bigger shed. My dad said if I get a shed from Home Depot I don't need to get a permit. I really don't know how true is that. I'll spend the extra money to buy the bigger shed if I don't need a permit if not and I'm stuck with just 120 sq ft then I'll just build my own from scratch.