San Diego Building Height Limits by Zone 2026
Zone-by-zone height regulations for San Diego properties
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Building height limits in San Diego vary significantly by zone classification. Understanding these limits — including how height is measured, exceptions, and bonus provisions — is critical for any development project. This guide covers the major zone categories.
Key Facts at a Glance
RS Zones
30 ft (2 stories)
RM-1 to RM-3
30–40 ft
RM-4 to RM-5
45–60 ft
Commercial (CC)
30–60 ft
Downtown
150–500+ ft
ADU (Detached)
16 ft (18 ft with pitch)
Residential Zones (RS & RM)
Single-family RS zones generally allow a maximum height of 30 feet. Multi-family RM zones range from 30 to 60 feet depending on the specific zone designation (RM-1 through RM-5). Height is measured from existing grade to the highest point of the roof. Chimneys, antennas, and mechanical equipment may extend above the height limit with certain restrictions.
Commercial & Mixed-Use Zones
Commercial zones (CN, CL, CC) range from 30 to 60 feet. Mixed-use zones in Community Plans may allow up to 65-85 feet with density bonus provisions. The Transit Priority Area (TPA) designation can unlock additional height allowances when projects meet affordable housing requirements.
Downtown / Centre City
Downtown San Diego has the most permissive height regulations, with subdistricts allowing 150 to 500+ feet. Height is primarily limited by FAA regulations near the airport and the Downtown Community Plan. Projects in the Little Italy, East Village, and Core subdistricts have varying maximums.
Height Measurement Rules
Height is measured from the existing or proposed grade (whichever is lower) to the highest point of the structure. For pitched roofs, measurement goes to the midpoint of the roof. Exceptions include: rooftop mechanical equipment (up to 12 ft above roof), elevator penthouses, and solar installations.
Frequently Asked Questions
How is building height measured in San Diego?
From existing or proposed grade (whichever is lower) to the highest point of the structure. Pitched roofs are measured to the midpoint.
Can I exceed the height limit with a density bonus?
Yes. State Density Bonus Law allows up to 3 additional stories or 33 feet for qualifying affordable housing projects.
Do rooftop solar panels count toward height?
Generally no. Solar installations are typically exempt from height calculations if they do not extend more than 5 feet above the roof surface.
Citations & References
- SDMC §113.0270 – Measurement of Height
- SDMC §131.0461 – RS Zone Development Regulations
- SDMC §131.0531 – RM Zone Development Regulations
- SDMC §156.0300 – Centre City Planned District
- California Government Code §65915 – Density Bonus Law
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