San Diego, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Governing section
- SDMC § 131.0445
- RS steep-hillside lots
- 50% max coverage
- RM-5-12 interior lots
- 50% max coverage
- RM-5-12 corner lots
- 60% max coverage
- RM-5-12 over 10 stories
- 21% max coverage
Summary
Lot coverage in San Diego's residential zones is capped at 50 percent on steep-hillside RS lots and by a sliding 50/60 percent to 21 percent scale in the RM-5-12 zone, per SDMC §131.0445.
In the RS-1-1, RS-1-2, RS-1-3, RS-1-4, RS-1-5, RS-1-6, and RS-1-7 zones and in small lot subdivisions in accordance with Section 143.0365, the maximum permitted lot coverage is 50 percent on any premises where more than 50 percent of the premises contains steep hillsides. In the RM-5-12 zone, maximum lot coverage is 50 percent for interior lots and 60 percent for corner lots, except that maximum lot coverage for any premises that has a building exceeding 4 stories or 48 feet in height shall be reduced in accordance with Table 131-04I.
Full Breakdown
SDMC §131.0445 sets lot coverage limits by zone rather than one citywide figure. In RS-1-1 through RS-1-7 zones and qualifying small-lot subdivisions, coverage is capped at 50 percent on any premises where more than half the lot is steep hillside. In the RM-5-12 zone, coverage is capped at 50 percent for interior lots and 60 percent for corner lots, stepping down to as low as 21 percent for buildings over ten stories or 120 feet tall under Table 131-04I. RT-zone garages of 525 square feet or less are excluded from the calculation.
Violations & Fines
Exceeding the zone's maximum lot coverage without an approved discretionary permit or variance draws a Development Services code enforcement notice and can require removal or resizing of the non-conforming structure.
Frequently Asked Questions
What is the maximum lot coverage in San Diego residential zones?
Do garages count toward lot coverage in San Diego?
Sources & Official References
Other rules in San Diego
California rules heatmap·Compare San Diego 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.