Bostonia, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Authority
- SD County Zoning § 4700–4799
- Set by
- Coverage Designator
- Form
- Decimal fraction and/or sq ft
- Rule
- Most restrictive applies
- Dash means
- Limited only by setbacks
Summary
San Diego County limits how much of a lot buildings may cover through a Coverage Designator. It can cap coverage as a decimal fraction of the lot or a maximum square footage; the more restrictive applies.
The purpose of these provisions is to establish the maximum lot area which may be covered by buildings. ... Maximum lot coverage shall be established to regulate the intensity of development and any such coverage may be specified by the Development Designator.
Full Breakdown
Bostonia's lot-coverage limits come from the San Diego County Zoning Ordinance Coverage Regulations (§ 4700 et seq.). The purpose is to establish the maximum lot area that may be covered by buildings. Coverage is indicated by a Coverage Designator: an Arabic numeral as a decimal fraction setting the maximum portion of the lot buildings may cover, and/or a whole number setting the maximum square footage, whichever is most restrictive applies. A dash means coverage is not separately regulated except as limited by required setbacks. Look up your parcel's Development Designator to find its coverage cap through County Planning & Development Services.
Violations & Fines
Exceeding the permitted lot coverage is a zoning violation; the County can deny building permits or require removal of the over-coverage through code enforcement.
Frequently Asked Questions
How much of my Bostonia lot can I build on?
What if my parcel has a dash for coverage?
Sources & Official References
Other rules in Bostonia
California rules heatmap·Compare Bostonia to another location·View the California building setbacks & zoning overview
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Lot Coverage Limits in Nearby Cities
How other cities in San Diego County handle lot coverage limits.