For Real Estate Professionals

Essential tools, resources, and information for real estate agents, brokers, appraisers, title companies, and other industry professionals working in Alameda County.

Online Tools & Data

Parcel ViewerLook up property details, ownership, and assessed values

Property Tax DataLook up assessed values and property tax data by address or map location

Supplemental Tax EstimatorCalculate estimated supplemental taxes for your clients

Assessment MapsBrowse Assessor’s Maps on display at our office and available for purchase

Property Tax Essentials

Exemptions Your Clients Should Know About

Homeowners’ Exemption — Up to $7,000 off assessed value for primary residences
Disabled Veterans’ Exemption — Significant relief for qualifying veterans
Proposition 19 — Base year value transfers for 55+, disabled, or disaster victims

Exclusions from Reassessment

Parent-Child Transfers — Primary residence transfers (Prop 19 rules apply after Feb 2021)
Interspousal Transfers — No reassessment on transfers between spouses
Proportional Interest Transfers — Certain partnership and LLC transfers

Report Incorrect Data

If you notice incorrect property data in our records, please help us maintain accuracy by contacting us at AssessorWebResponse@acgov.org or calling (510) 272-3787.

Real Estate Fraud Prevention

Protect your clients from property fraud. The Alameda County Clerk-Recorder offers a free Property Fraud Alert notification service. Learn more at the Clerk-Recorder’s Office.