Assessor
Read the county’s parcel-map guidance, access options and use restrictions before opening its viewer. Assessment maps are approximate and do not establish legal property boundaries.
- Availability · Parcel map accuracy and boundaries
- Parcel maps are for assessment purposes, not legal surveys or boundary-dispute determinations.
Source & saved evidence
Alameda County official service / referred provider · Alameda — property query (opens in a new tab)
County property lookup — Parcel map accuracy and boundaries
Assessor parcel maps are prepared for assessment purposes only. They are not legal surveys and should not be used to determine exact property boundaries or resolve boundary disputes.
Agent source review: October 15, 2026 · Snapshot
84e002049b84fa75
Before you start · 2 requirements & conditions
- Eligibility & access · Parcel Viewer permitted uses
- The county posts restrictions on Parcel Viewer use, including personal matters, political campaigns and profit. Read its full disclaimer before proceeding.
Source & saved evidence
Alameda County official service / referred provider · Alameda — property query (opens in a new tab)
County property lookup — Parcel Viewer permitted uses
Prohibited uses include, but are not limited to, uses for political campaigns, personal matters, or profit.
Agent source review: October 15, 2026 · Snapshot
84e002049b84fa75 - Processing time · New parcel map processing
- Parcel map processing may pause in May and June for annual roll preparation; this is not a guarantee of completion time.
Source & saved evidence
Alameda County official service / referred provider · Alameda — property query (opens in a new tab)
County property lookup — New parcel map processing
Please note that parcel map processing may be paused during May and June each year due to annual tax roll preparation.
Agent source review: October 15, 2026 · Snapshot
84e002049b84fa75
Source & saved evidence
Alameda County official service / referred provider · Alameda — property query (opens in a new tab)
County property lookup — Parcel maps and assessment records — instructions
Assessor Parcel Maps along with assessment and property related data can be accessed through Assessor Parcel Viewer.
Agent source review: October 15, 2026 · Snapshot 84e002049b84fa75
County-linked viewer for parcel maps and assessment information. The county’s use restrictions and map limitations apply.
Source & saved evidence
Alameda County official service / referred provider · Alameda — property query (opens in a new tab)
County property lookup — Open the county-linked Parcel Viewer
Open Parcel Viewer
Agent source review: October 15, 2026 · Snapshot 84e002049b84fa75
- Phone
- (510) 272-3787
- Address
- 1221 Oak Street, Room 145, Oakland, CA 94612
- Hours
- 9:00 AM to 4:30PM Monday – Friday except for holidays