HPOZ Rules: Palo Alto vs San Jose
How do hpoz rules rules compare between Palo Alto, CA and San Jose, CA?
Palo Alto has fewer restrictions than San Jose.
Palo Alto, CA
Santa Clara County
Santa Clara County has no countywide HPOZ. A handful of cities run their own heritage districts, including Mountain View's Whisman and Old Mountain View, plus Palo Alto's Professorville, where overlay design review applies to exterior changes.
View full Palo Alto rules →San Jose, CA
Santa Clara County
San Jose protects historic neighborhoods through Historic District (HD) and Conservation Area (CSA) overlay zones under SJMC Chapter 13.48, requiring Historic Preservation Permits for exterior alterations, additions, and demolitions on contributing properties within designated districts.
View full San Jose rules →Key Facts Comparison
| Fact | Palo Alto | San Jose |
|---|---|---|
| County HPOZ | None countywide | - |
| Mountain View code | MVMC Chapter 36.27 | - |
| Palo Alto district | Professorville (PAMC §16.49) | - |
| Review body | City heritage commission | - |
| Unincorporated path | Heritage Resource Inventory | - |
| Local code | - | SJMC Chapter 13.48 |
| Overlays | - | HD and CSA |
| Reviewer | - | Historic Landmarks Commission |
| Permit type | - | Historic Preservation Permit |
| State overlay | - | CEQA Section 15064.5 |
Highlighted rows indicate differences between cities.
Palo Alto FAQ
Is my unincorporated Santa Clara County home in a heritage overlay?
No. Unincorporated parcels are not subject to a countywide HPOZ. Properties on the Santa Clara County Heritage Resource Inventory still require Planning Department review for demolition or major alteration.
How do I find out if Mountain View's HPOZ covers my property?
Use the Mountain View Heritage Map or call the Community Development Department. Properties inside Old Mountain View or Whisman trigger Heritage Preservation Commission design review for visible exterior changes.
San Jose FAQ
Do I need a permit for paint color changes in a Historic District?
Sometimes. Most San Jose Historic Districts have adopted color palettes or guidelines. Staff-level Historic Preservation Permits often handle paint, while non-conforming colors may need Historic Landmarks Commission review.
What's the difference between HD and CSA overlays?
Historic District (HD) overlays apply stricter design review for contributing properties. Conservation Area (CSA) overlays are lighter, focused on neighborhood character rather than strict period-correct restoration of individual buildings.
Compare other topics
See how Palo Alto and San Jose compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool