Detached accessory buildings must observe all zoning requirements for setbacks from property lines and coverage of the site. In addition, the total floor area of all detached accessory structures on a residential property is limited to 580 square feet and their height is limited to one-story or 15 feet.
There are several exceptions to the rules for setbacks and total area, which are too complicated to explain in this FAQ. Please contact either the Planning Department (285-1980) or Building Department (285-1960) for more information.