The Assessor Division – Novel Coronavirus COVID-19 Update


The Assessor Division will continue to provide essential services through email, phone, Live Chat and our website. These services include, but are not limited to, the following:

  • Appraisal Services
  • Business Property Auditor-Appraiser Services
  • Change in Ownership
  • Exemptions (Institutional, Welfare, Homeowners’, etc.)
  • Appraisal Support

To contact our office please use the following email and phone numbers:

General Information:

Appraisal Services: 650.599.1227

Change in Ownership: 650.599.1743

Exemptions & Address changes: 650.363.4771

Business Personal Property Valuation:

Business Property: 650.363.4501

For additional information, please see our website at or utilize ACRE Live Chat feature.

ACRE’s operating hours are Monday through Friday, 8 a.m. to 5 p.m.