Fence Regulations in Bostonia, CA (2026)
7 verified fence regulations for Bostonia, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Height Limits
Bostonia is unincorporated San Diego County, so the County Zoning Ordinance sets fence heights: 42 inches max in a front or exterior side yard and 72 inches (6 feet) in a rear or interior side yard.
Fence Height Limits in Bostonia
Some RestrictionsSan Diego County Zoning Ordinance § 6708
Front or exterior side yard: Permitted up to a maximum height of 42 inches. Rear or interior side yard: Permitted up to a maximum height of 72 inches.
Permit Requirements
A County building permit is not required for a fence or freestanding masonry wall up to 6 feet high that meets zoning rules, or an open security fence up to 8 feet. Taller or non-conforming fences need a permit.
Fence Permits in Bostonia (San Diego County)
Some RestrictionsSan Diego County Building Division, PDS 070 (California Building Code as adopted)
A building permit is required for any fence except the following: Fences and freestanding masonry walls not exceeding 6 feet in height and complying with the fencing and landscape regulations of the County Zoning Ordinance.
Neighbor Fence Rules
The County zoning code doesn't decide who pays for a boundary fence. California's Good Neighbor Fence Law (Civil Code § 841) presumes adjoining owners share the cost equally, with 30 days' written notice before building.
Shared Fence Rules for Bostonia Neighbors
Some RestrictionsCal. Civil Code § 841(b)(1)
Adjoining landowners are presumed to share an equal benefit from any fence dividing their properties and, unless otherwise agreed to by the parties in a written agreement, shall be presumed to be equally responsible for the reasonable costs of construction, maintenance, or necessary replacement of the fence.
Retaining Walls
In unincorporated San Diego County, a retaining wall's height is generally unlimited when stabilizing a bank, but every retaining wall higher than 3 feet requires a County building permit.
Retaining Wall Rules in Bostonia
Some RestrictionsSan Diego County PDS-308 (Zoning Division)
Retaining walls: When a retaining wall is used to stabilize a bank or enhance the usefulness of the property, the height of such wall is unlimited however; every retaining wall higher than 3 feet requires approval of a building permit.
Fence Requirements
San Diego County regulates fence construction under the adopted California Building Code. Fences within 5 feet of a building in wildland-urban interface areas must use non-combustible or fire-resistive material per Building Code Section 707A.
Fence Construction Requirements in Bostonia
Some RestrictionsSan Diego County Building Code § 707A (PDS 070)
Any portion of a fence within 5 feet of a building shall be constructed of non-combustible material or approved exterior fire-retardant wood or material that meets the same fire-resistive standards for exterior walls per Section 707A of the County Building Code.
Material Restrictions
San Diego County limits barbed and razor wire: open fences may reach 8 feet only where the top two feet are barbed or razor wire for security, and WUI fences near buildings must be fire-resistive.
Fence Material Restrictions in Bostonia
Some RestrictionsSan Diego County Building Division, PDS 070
Open fences up to 8 feet in height, where allowed by the County Zoning Ordinance, provided the uppermost two feet consists only of barbed or razor wire and necessary support elements placed at an angle to the vertical for security purposes.
Approved Materials
San Diego County permits wood, chain-link, and masonry fences to County construction standards. Masonry fences must use ASTM C90 Grade N block with a minimum compressive strength of 1,500 psi and cells grouted solid.
Approved Fence Materials in Bostonia
Some RestrictionsSan Diego County Building Division, PDS 070 (Masonry Fences)
Concrete masonry units shall conform to ASTM C90 Grade N units with F'm 1,500 psi and all cells grouted solid.
Looking for San Diego County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Bostonia city rules.
Fence Regulations in San Diego County →