Accessory Structures in Seaside, CA (2026)
3 verified accessory structures rules for Seaside, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
California's statewide ADU law (Gov. Code §65852.2) requires Seaside to allow accessory dwelling units on residential lots by right — detached ADUs up to 1,200 sq ft, 4-foot side/rear setbacks, no owner-occupancy requirement, and no added parking within ½ mile of transit.
Accessory Structures: Adu Rules
Few RestrictionsShed Rules
Sheds in Seaside must meet zoning setback rules for accessory structures. Under the California Building Code, a building permit is generally required for sheds over 120 square feet; smaller sheds still must meet placement rules.
Accessory Structures: Shed Rules
Some RestrictionsGarage Conversions
Converting a garage to living space in Seaside requires a building permit and zoning review for egress, light/ventilation and parking; converting to a separate unit is often processed as an ADU under state law.