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.
Unlike Los Angeles, Santa Clara County operates no countywide Historic Preservation Overlay Zone over unincorporated land. Within incorporated jurisdictions, three cities maintain HPOZ-style overlays. Mountain View designates two districts under MVMC §36.27, requiring Heritage Preservation Commission review for visible alterations, demolitions, and new construction. Palo Alto's Professorville district under PAMC §16.49 imposes Historic Resources Board approval for exterior changes to contributing structures. Saratoga and Los Gatos use individual landmark designations rather than overlays. Outside these districts, county heritage rules rely on the SCC Heritage Resource Inventory administered by the Department of Planning and Development.
Unpermitted exterior alterations or demolition inside a city HPOZ district trigger stop-work orders, restoration mandates, and per-day administrative fines that can exceed $1,000 plus mandatory CEQA review for repeat infractions.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Palo Alto, CA
Palo Alto Airport (PAO) enforces a voluntary curfew and noise abatement procedures, with FAA preemption limiting local authority over flight operations.
Palo Alto, CA
Palo Alto prohibits amplified music audible beyond the property line during quiet hours and requires a special event permit for outdoor amplification in publ...
Palo Alto, CA
Palo Alto enforces strict decibel limits by zone under PAMC 9.10.040: 60 dBA day / 50 dBA night in residential, scaling up to 70 dBA in manufacturing zones.
Palo Alto, CA
Palo Alto permits construction Monday-Friday 8am to 6pm and Saturday 9am to 6pm, with no work allowed on Sundays or holidays under PAMC 9.10.060.
Palo Alto, CA
Palo Alto requires encroachment permits for new driveways, regulates curb cut dimensions, and prohibits blocking sidewalks or adjacent driveways under traffi...
Palo Alto, CA
Palo Alto restricts RV, trailer, and boat storage on public streets and requires screening for large recreational vehicles on residential property under zoni...
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