Here is a master list of the Building Division's bulletins and forms. Submit plans, to scale, with a sheet size of 18" X 24" to 24" X 36" and any other required documents through the Public Permit Portal.Step 1: The first step is filling out a San Jose building permit application. They generate the drawings and can even submit them to the county for you. A San Jose building permit is required for sheds and other accessory buildings if they are 120 square feet or greater. ¼" = 1'-0" for building plans, elevations, and sections;; ​¾" = 1'-0" for building details and sections ​. Minimum font size: 10 pt.