Property Tax Appeals in Mendocino County, California
Mendocino County replaced its local Board of Equalization with a dedicated Assessment Appeals Board under Ordinance No. 4286, adopted December 6, 2011 and officially activated July 1, 2013. The Board's page states that an application must include an original wet signature, an original wet signature on the agent authorization form if applicable, and the application fee listed on the Application Form, and may be submitted in person or by mail to the Clerk of the Board, 501 Low Gap Road, Room 1010, in Ukiah, CA 95482, during business hours from July 2nd through November 30th for regular assessments; the Board's page itself does not print the dollar fee amount. FairPath can help an owner organize a comparison table, condition photos, official links, and a filing checklist. It does not file the application, choose the owner's opinion of value, pay the fee, or communicate with the Assessor's Office on the owner's behalf.
Assessment context: Begin with the Assessor's parcel record and confirm whether the dispute concerns the January 1, 2026 lien-date value on the regular roll, or an escape, supplemental, or calamity assessment governed by a different filing period described on the application itself. Mendocino County stretches from a rugged Pacific coastline around the towns of Mendocino and Fort Bragg, through redwood-forested coastal ranges, to the inland Ukiah Valley and Anderson Valley wine country, and includes licensed cannabis-cultivation parcels regulated under the county's cannabis business tax program. A property a few miles away may sit in a very different coastal, agricultural, or cannabis-cultivation zoning designation, so land use and site access should be confirmed against the Assessor's record rather than assumed from a map.
Filing process: Mendocino County's Assessment Appeals Board page states that an application must carry an original wet signature, include an original wet signature on the agent authorization form when an agent is used, and be submitted with the application fee listed on the Application Form; the page notes that scanned or emailed applications, and scanned non-original agent-authorization signatures, will not be accepted. Applications may be filed in person or by mail to the Clerk of the Board at 501 Low Gap Road, Room 1010, in Ukiah, CA 95482, during business hours from July 2nd through November 30th for regular assessments. The Clerk of the Board's staff can be reached at (707) 463-4441 with questions about the appeals process, and current vacancies for two alternate Board member seats were posted on the same page.
Evidence to review: Mendocino County's Assessment Appeals Board page links to the State Board of Equalization's general FAQ, its instructional video for filing an assessment appeal, and the California Assessment Appeals Manual and Publication 30 residential guide as background on preparing evidence for a hearing. Build a comparable-sales table showing sale date, price, parcel, community, lot size, living area, age, and condition, weighted toward sales near the January 1, 2026 lien date. For coastal, vineyard, or cannabis-cultivation parcels, document site access, permitted acreage or cultivation status, and any physical limitations with dated photographs or licensing records, since Mendocino County's geography spans coastal, wine-growing, and cannabis-regulated land uses that can differ sharply within a few miles.
Current deadline guidance: 2026 regular assessment appeals: July 2 through November 30, 2026. Mendocino County's Assessment Appeals Board page states that regular-assessment applications are accepted during business hours July 2nd through November 30th, and directs applicants to the application itself for filing-period information on escape, supplemental, and calamity assessments, consistent with the California State Board of Equalization's certified 2026 county filing-period table.
Mendocino County's Assessment Appeals Board page sets a regular-assessment filing window of July 2nd through November 30th during business hours, matching the state's extended deadline group.
Mendocino County requires an original wet signature and states that scanned or emailed applications will not be accepted, so filing is limited to in-person or mailed submission.
The Board's page states an application fee applies, listed on the Application Form itself, but does not print the dollar amount on the Board's own page.
Mendocino County's Assessment Appeals Board was established by Ordinance No. 4286 in December 2011 and officially activated on July 1, 2013, replacing the county's local Board of Equalization.
Official filing authority: Mendocino County Clerk of the Board, Assessment Appeals Board. https://www.mendocinocounty.gov/government/board-of-supervisors/assessment-appeals-board
Source: Mendocino County, Assessment Appeals Board, https://www.mendocinocounty.gov/government/board-of-supervisors/assessment-appeals-board. Reviewed 2026-09-22.
Source: Mendocino County Board of Supervisors, Forms, https://www.mendocinocounty.gov/government/forms. Reviewed 2026-09-22.
Source: California State Board of Equalization, Letter to Assessors 2026/023: 2026 Assessment Appeal Filing Periods, https://boe.ca.gov/proptaxes/pdf/lta26023.pdf. Reviewed 2026-09-22.
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