Accessory Structures in Bostonia, CA (2026)
5 verified accessory structures rules for Bostonia, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Bostonia is unincorporated San Diego County, so accessory dwelling units follow the County Zoning Ordinance (Sec. 6156.x) as constrained by California ADU law. The County no longer requires owner-occupancy; a detached ADU up to 1,200 sq ft is allowed by ministerial permit with 4-foot side/rear setbacks.
ADU Rules in Bostonia (Unincorporated San Diego County)
Some RestrictionsCA Gov. Code Sec. 66314
Local agencies are prohibited from requiring... front setbacks, and minimum lot size... that does not permit at least an 800 square foot accessory dwelling unit with four-foot side and rear yard setbacks to be constructed.
Shed Rules
Bostonia sheds follow the San Diego County Zoning Ordinance (Sec. 6156). Detached accessory structures are limited to one story not exceeding 12 feet in height and must meet the yard setbacks of the zone. Small tool sheds may be exempt from a building permit but still must comply with zoning
Shed Rules in Bostonia (San Diego County Zoning)
Some RestrictionsGarage Conversions
Bostonia garage conversions are reviewed by San Diego County. Converting a permitted garage into living space or an ADU requires County permits; if turned into an ADU, no setbacks are required for the existing footprint (except fire safety), but replacement parking rules and building-code upgrades apply.
Garage Conversions in Bostonia (County Zoning)
Some RestrictionsCarport Rules
Bostonia carports are accessory structures under San Diego County Zoning Ordinance Sec. 6156. They must meet the required yard setbacks and height limits of the zone, and a carport attached to a home or ADU is subject to the primary structure's setbacks. Building permits are generally required.
Carport Rules in Bostonia (County Zoning)
Some RestrictionsTiny Homes
Bostonia tiny homes are governed by San Diego County. A tiny home on a permanent foundation is treated as a dwelling or ADU under Zoning Ordinance Sec. 6156 and California ADU law. A movable tiny house on wheels is regulated as an RV/trailer and generally cannot be used as a
Tiny Homes in Bostonia (San Diego County)
Some RestrictionsLooking for San Diego County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Bostonia city rules.
Accessory Structures in San Diego County →