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Find county GIS and property maps

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

Before you start

Start with the jurisdiction of the property. County permit offices may serve only unincorporated areas.
Use the official map and confirm project requirements with the planning or building office.

2 guides with reviewed service links · Sonoma

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California58 counties

County directory Reviewed service guides available

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Map source

U.S. Census boundaries via U.S. Atlas · 2017 edition, simplified for display.

County government · Sonoma

Assessor

Serves Sonoma County, California. Use the official service instructions to confirm jurisdiction and appointment requirements.

Parcel 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.

Source checked October 26, 2026

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

Official property-office map referral: Parcel Maps

Parcel Maps

Saved evidence: 124cea140cb5189b · Agent source review

Full guide, contact details & sources →

County government · Sonoma

Permit Sonoma

Unincorporated Sonoma County, outside its nine incorporated cities.

Interactive MapsOfficial instructions

Source checked October 26, 2026

Sonoma County · Sonoma County — building (opens in a new tab)

Official property-office map referral: Interactive Maps

Interactive Maps

Saved evidence: 5ebf107059cf3ca1 · Agent source review

Full guide, contact details & sources →