Anti-Mansionization: Palo Alto vs Sunnyvale
How do anti-mansionization rules compare between Palo Alto, CA and Sunnyvale, CA?
Palo Alto and Sunnyvale have similar restriction levels.
Palo Alto, CA
Santa Clara County
Santa Clara County has no countywide mansionization ordinance, but Title C zoning sets floor area ratio caps, lot coverage limits, and tiered setbacks in residential and rural districts of unincorporated areas, including hillside, scenic, and AP-Agricultural Preserve overlays.
View full Palo Alto rules →Sunnyvale, CA
Santa Clara County
Santa Clara County has no countywide mansionization ordinance, but Title C zoning sets floor area ratio caps, lot coverage limits, and tiered setbacks in residential and rural districts of unincorporated areas, including hillside, scenic, and AP-Agricultural Preserve overlays.
View full Sunnyvale rules →Key Facts Comparison
| Fact | Palo Alto | Sunnyvale |
|---|---|---|
| Zoning code | SCC Title C residential rules | SCC Title C residential rules |
| R-1 FAR range | 0.40 to 0.45 typical | 0.40 to 0.45 typical |
| Hillside overlay | HS slope-based height limits | HS slope-based height limits |
| Reviewing agency | County Planning and Development | County Planning and Development |
| Scenic review | Architectural and Site Approval | Architectural and Site Approval |
Highlighted rows indicate differences between cities.
Palo Alto FAQ
Does Santa Clara County have a Baseline Mansionization Ordinance?
No single BMO exists. The county uses district-specific FAR caps, hillside slope-density rules, and Architectural and Site Approval in scenic corridors instead, with each unincorporated zone applying tailored bulk standards.
How do I find the FAR cap for my parcel?
Use the County Planning Department's online parcel viewer to identify base zoning and overlays. The applicable Title C section then provides FAR, lot coverage, height, and setback figures for that specific district.
Sunnyvale FAQ
Does Santa Clara County have a Baseline Mansionization Ordinance?
No single BMO exists. The county uses district-specific FAR caps, hillside slope-density rules, and Architectural and Site Approval in scenic corridors instead, with each unincorporated zone applying tailored bulk standards.
How do I find the FAR cap for my parcel?
Use the County Planning Department's online parcel viewer to identify base zoning and overlays. The applicable Title C section then provides FAR, lot coverage, height, and setback figures for that specific district.
Compare other topics
See how Palo Alto and Sunnyvale compare on other ordinance categories.
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