San Mateo County, California · Property and assessment

Find county GIS and property maps in San Mateo 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.

2 providers · 2 official links · 1 reviewed requirement · sources checked October 26, 2026

In San Mateo County, 2 county departments publish 2 official links for this service. Reviewed requirements cover availability notices (1). 1 provider publishes reviewed fee items and 2 providers list forms on their guides.

These are the San Mateo 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-County Clerk-Recorder

Parcel/Assessor MapsOfficial 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 · Online assessor/recorded map access: The Property Maps portal allows you to download Assessor’s maps or Recorded maps such as subdivision maps and parcel maps online for free.
Source & saved evidence
Official county property-map provider or referred mapping platform · Parcel/Assessor Maps (opens in a new tab)
Online assessor/recorded map access
The Property Maps portal allows you to download Assessor’s maps or Recorded maps such as subdivision maps and parcel maps online for free.
Agent source review: October 26, 2026 · Snapshot e2482651bc97c234