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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.

1 guide with reviewed service links · Humboldt

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

County government · Humboldt

Planning & Building — Building Inspection

Unincorporated Humboldt County. Eureka, Arcata, Trinidad, Rio Dell, Fortuna, Ferndale and Blue Lake have separate jurisdictions.

Web GISOfficial 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

Humboldt County · Humboldt — building permit department (opens in a new tab)

Official property-office map referral: Web GIS

Web GIS

Saved evidence: 681f11fc68daf535 · Agent source review

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