The 47 California Counties Where Regular Assessment Appeals Close November 30
California regular assessment appeals close September 15 in 11 counties and November 30, 2026 in 47, per the Board of Equalization. The full county split.
California's regular assessment appeal filing period began July 2, 2026, and it ends on one of two dates. The State Board of Equalization's Letter to Assessors No. 2026/023, dated June 2, 2026, explains the split. The period ends September 15, 2026 in counties where the assessor mails assessment notices to all taxpayers with property on the secured roll by August 1, 2026. Where notices are not mailed by August 1, the period is extended to November 30, 2026. The letter lists every county.
Eleven counties close September 15
The Board's list shows Alameda, Alpine, Inyo, Kings, Mono, Placer, San Francisco, San Luis Obispo, Santa Clara, Sierra and Ventura ending their regular filing period on Tuesday, September 15, 2026.
Forty-seven counties close November 30
The other 47 counties end the regular period on Monday, November 30, 2026. They include Los Angeles, Orange, San Diego, Riverside, San Bernardino, Sacramento, Contra Costa, San Mateo, Santa Barbara, Fresno, Kern, Sonoma, Solano and Stanislaus. The Los Angeles County Assessment Appeals Board states that filing for 2026 regular assessments ends November 30, 2026 at 12 midnight PST.
Applications and other notices
Appeals go to each county's assessment appeals board, and fees and procedures vary by county. Stanislaus County, for example, lists a $30.00 non-refundable processing fee for each Assessment Appeal Application and requires one application per parcel. Stanislaus also states that appeals of supplemental and escape assessments are due no later than 60 days after the postmark or the mailing date printed on the tax bill, whichever is later, rather than on the regular-period date.
What FairPath does
FairPath organizes the public record, comparable properties the homeowner selects, and condition facts the homeowner documents into a reviewed evidence packet. The homeowner decides whether to file, files through the official process, and attends any hearing. FairPath does not file, represent the homeowner, or guarantee acceptance, a reduction, savings, or another outcome.
FairPath's county guides for Los Angeles, Orange, San Diego and Stanislaus collect the official sources and start with the property address.
Official sources
Sources reviewed September 13, 2026. Instructions and dates can change, so confirm the current official page before filing.
