The San Francisco Building Code defines a storage shed exempt from permit as follows: “A one-story detached accessory building or structure used as a tool and storage shed, children's playhouse or similar uses, provided the projected roof area does not exceed 100 square feet”. (SFBC 106A.

The San Francisco Building Code defines a storage shed exempt from permit as follows: "A one-story detached accessory building or structure used as a tool and storage shed, children's playhouse or similar uses, provided the projected roof area does not exceed 100 square feet". (SFBC 106A.