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Alameda County, California · Property and assessment

Find county GIS and property maps in Alameda County

Browse official GIS tools, assessor map information and county map referrals. Some entries provide instructions or map indexes rather than an interactive GIS viewer.

1 provider · 1 official link · 2 reviewed requirements · sources checked October 26, 2026

In Alameda County, 1 county department publishes 1 official link for this service. Reviewed requirements cover availability notices (1) and processing time (1). 1 provider lists forms on its guide.

These are the Alameda County providers with a reviewed service link for this task. Other offices may also help, and a provider may serve only part of the county: check each service area. Fees and forms stay on each office’s guide, where their sources are cited.
County government

Assessor

Parcel Map FAQs (opens in a new tab)Official instructions

Officially linked county property-map resource. This verifies the referral and stated label; interactive layers, parcel results, legal boundaries, buildability and application eligibility are not determined here.

Availability · Assessor maps are not surveys
No. The Assessor’s Office cannot determine or verify exact property boundaries. Parcel maps are approximate representations for assessment purposes only. To determine actual property boundaries, you should hire a licensed land surveyor.
Source & saved evidence

Official county property-map provider or referred mapping platform · Parcel Map FAQs (opens in a new tab)

Assessor maps are not surveys

No. The Assessor’s Office cannot determine or verify exact property boundaries. Parcel maps are approximate representations for assessment purposes only. To determine actual property boundaries, you should hire a licensed land surveyor.

Agent source review: October 26, 2026 · Snapshot a3ec6348bdfe1eda

Before you start · 1 requirement & conditions
Processing time · Map overlay and update limitations
Parcel boundaries displayed in the online viewer may shift slightly due to aerial photo overlays and the limitations of converting recorded document data to digital map formats. There may also be a processing delay of several weeks before newly recorded changes appear in the viewer.
Source & saved evidence

Official county property-map provider or referred mapping platform · Parcel Map FAQs (opens in a new tab)

Map overlay and update limitations

Parcel boundaries displayed in the online viewer may shift slightly due to aerial photo overlays and the limitations of converting recorded document data to digital map formats. There may also be a processing delay of several weeks before newly recorded changes appear in the viewer.

Agent source review: October 26, 2026 · Snapshot a3ec6348bdfe1eda

Source & saved evidence

Alameda County · Alameda County — assessor (opens in a new tab)

Official property-office map referral: Parcel Map FAQs

Parcel Map FAQs

Agent source review: October 26, 2026 · Snapshot 2b639b5b714f9c47

Address
1221 Oak Street, Room 145, Oakland, CA 94612
Hours
9:00 AM to 4:30PM Monday – Friday except for holidays

Contacts & sources · 2 forms

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All Alameda County services and offices → · Report an error on this page