California Property Tax Appeal Guides
Browse source-reviewed property tax appeal guides for California. County deadlines, filing methods, and available records can differ by county and tax year.
Each published guide identifies the public sources used for its deadline and filing summary. Confirm current requirements with the official filing authority before submitting anything.
How California assessment appeals generally work (state framework reviewed 2026-10-05 from official California sources): County assessors generally value property at full cash or fair market value, but Proposition 13 establishes a base-year value after acquisition, new construction, or another reassessable event and generally limits annual inflation adjustments to 2%. For real property subject to that system, the enrolled taxable value is generally the lesser of current full cash value and factored base-year value. For locally assessed property, one or more Assessment Appeals Boards or the county Board of Supervisors performs the local board-of-equalization role. A court challenge follows the applicable refund-claim path; property assessed by the state follows a separate route.
California deadline framework: Regular lien-date/decline-in-value filing periods are county- and assessment-year-specific; for 2026, BOE LTA 2026/023 certifies July 2 through either September 15 or November 30 by county. Supplemental/base-year, escape, calamity, penalty, roll-change, and other assessment types use separate notice, tax-bill, or roll-year rules. Classify the assessment and check the actual notice and current county clerk instructions; the regular-roll date is not a substitute for a notice-trigger deadline.
Local variation in California: County assessors and Clerks of the Board administer current application versions, fees, filing-period certifications, filing channels, evidence exchange, hearing calendars, and local board procedures. State-assessed property follows a separate Board of Equalization route. Supplemental, base-year, escape, calamity, penalty, roll-change, and refund matters have distinct rules and triggers.
Before relying on a date: Resolve the county and assessment year, classify the actual assessment type, and read the notice or tax bill and its mailing/postmark dates. Verify the county's certified regular period only for a regular lien-date appeal; separately confirm the county-issued BOE-305-AH, clerk receipt rules, fee, evidence exchange, hearing notice, and any refund-claim or court prerequisites.
State source: California State Board of Equalization, California Property Tax: An Overview (Publication 29), https://boe.ca.gov/proptaxes/pdf/pub29.pdf. Reviewed 2026-10-05.
State source: California State Board of Equalization, Assessment Appeals, https://www.boe.ca.gov/proptaxes/asmappeal.htm. Reviewed 2026-10-05.
State source: California State Board of Equalization, Assessment Appeals Frequently Asked Questions, https://www.boe.ca.gov/proptaxes/faqs/assessappeals.htm. Reviewed 2026-10-05.
State source: California State Board of Equalization, County Assessment Appeals Filing Period for 2026 (LTA 2026/023), https://www.boe.ca.gov/proptaxes/pdf/lta26023.pdf. Reviewed 2026-10-05.
State source: California State Board of Equalization, Residential Property Assessment Appeals (Publication 30), https://www.boe.ca.gov/proptaxes/pdf/pub30.pdf. Reviewed 2026-10-05.
Alameda County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through September 15, 2026. Guide: https://fairpath.app/property-tax-appeal/california/alameda-county
Amador County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/amador-county
Butte County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/butte-county
Calaveras County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/calaveras-county
Colusa County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/colusa-county
Contra Costa County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/contra-costa-county
Del Norte County: 2026 deadline guidance is 2026 regular assessment appeals: filing period ends November 30, 2026; the county directs owners to the Local Assessment Appeals Board for the current filing period. Guide: https://fairpath.app/property-tax-appeal/california/del-norte-county
El Dorado County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/el-dorado-county
Fresno County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/fresno-county
Glenn County: 2026 deadline guidance is 2026 regular assessment appeals: filing period ends November 30, 2026; the county directs owners to the Clerk of the Board of Supervisors for the current filing period. Guide: https://fairpath.app/property-tax-appeal/california/glenn-county
Humboldt County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/humboldt-county
Imperial County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/imperial-county
Kern County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/kern-county
Lake County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/lake-county
Lassen County: 2026 deadline guidance is 2026 regular assessment appeals: filing period ends November 30, 2026; the county directs owners to the Clerk of the Board of Supervisors for the current filing period. Guide: https://fairpath.app/property-tax-appeal/california/lassen-county
Los Angeles County: 2026 deadline guidance is November 30, 2026 for regular assessment appeals. Guide: https://fairpath.app/property-tax-appeal/california/los-angeles-county
Madera County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/madera-county
Marin County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/marin-county
Mariposa County: 2026 deadline guidance is 2026 regular assessment appeals: the State Board of Equalization lists November 30, 2026; Mariposa County's page says July 2 to December 1. Confirm the date with the Clerk of the Board. Guide: https://fairpath.app/property-tax-appeal/california/mariposa-county
Mendocino County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/mendocino-county
Merced County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/merced-county
Modoc County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/modoc-county
Monterey County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/monterey-county
Napa County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/napa-county
Nevada County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/nevada-county
Orange County: 2026 deadline guidance is July 2 through November 30, 2026 for regular assessments. Guide: https://fairpath.app/property-tax-appeal/california/orange-county
Plumas County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/plumas-county
Riverside County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/riverside-county
Sacramento County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/sacramento-county
San Benito County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/san-benito-county
San Bernardino County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/san-bernardino-county
San Diego County: 2026 deadline guidance is July 2 through November 30, 2026 for regular assessments. Guide: https://fairpath.app/property-tax-appeal/california/san-diego-county
San Joaquin County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/san-joaquin-county
San Mateo County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/san-mateo-county
Santa Barbara County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/santa-barbara-county
Santa Clara County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through September 15, 2026. Guide: https://fairpath.app/property-tax-appeal/california/santa-clara-county
Santa Cruz County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/santa-cruz-county
Shasta County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/shasta-county
Siskiyou County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/siskiyou-county
Solano County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/solano-county
Sonoma County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/sonoma-county
Stanislaus County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/stanislaus-county
Sutter County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/sutter-county
Tehama County: 2026 deadline guidance is 2026 regular assessment appeals: filing period ends November 30, 2026; the county directs owners to the Clerk of the Board for the current filing period. Guide: https://fairpath.app/property-tax-appeal/california/tehama-county
Trinity County: 2026 deadline guidance is 2026 regular assessment appeals: final filing date November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/trinity-county
Tulare County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/tulare-county
Tuolumne County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/tuolumne-county
Yolo County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/yolo-county
Yuba County: 2026 deadline guidance is 2026 regular assessment appeals: July 2 through November 30, 2026. Guide: https://fairpath.app/property-tax-appeal/california/yuba-county
Source: Alameda County Clerk of the Board, 2026-2027 Assessment Appeal Application Notice, https://acgov.org/clerk/forms/NOTICE2026-revised.pdf. Reviewed 2026-09-13.
Source: Alameda County Clerk of the Board, Assessment Appeals, https://acgov.org/clerk/assessment.htm. Reviewed 2026-07-16.
Source: Alameda County Clerk-Administrator, 2026 Assessment Appeals Board Instruction Booklet, https://acgov.org/clerk/forms/AABBOOK2026_Final-Final.pdf. Reviewed 2026-07-16.
Source: Amador County, Board of Equalization (Assessment Appeals), https://www.amadorcounty.gov/government/board-of-equalization. Reviewed 2026-09-24.
Source: Amador County, Clerk of the Board, https://www.amadorcounty.gov/government/clerk-of-the-board. Reviewed 2026-09-22.
Source: Amador County Assessor, Information concerning Property Tax Assessment, https://www.amadorcounty.gov/government/assessor/property-tax-assessment-information. Reviewed 2026-09-24.
Source: Butte County Boards & Commissions, Assessment Appeals Board, https://www.buttecounty.net/323/Assessment-Appeals-Board. Reviewed 2026-09-22.
Source: Butte County Clerk of the Assessment Appeals Board, 2026-27 Assessment Appeal Application, https://www.buttecounty.net/DocumentCenter/View/19314/2026-27-Assessment-Appeal-Application. Reviewed 2026-09-22.
Source: Butte County Clerk of the Board, Assessment Appeals, https://www.buttecounty.net/188/Assessment-Appeals. Reviewed 2026-09-22.
Source: Calaveras County Assessor, Assessment Appeal Information, https://assessor.calaverasgov.us/Property-Assessment/Assessment-Appeal-Information. Reviewed 2026-09-22.
Source: Calaveras County Board of Supervisors, Assessment Appeals Board (AAB), https://bos.calaverasgov.us/AAB. Reviewed 2026-09-24.
Source: California Legislature, California Revenue and Taxation Code section 1605, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=RTC§ionNum=1605.. Reviewed 2026-09-24.
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.
Source: California State Board of Equalization, Letter To Assessors No. 2026/023: County Assessment Appeals Filing Period for 2026, https://www.boe.ca.gov/proptaxes/pdf/lta26023.pdf. Reviewed 2026-09-14.
Source: California State Board of Equalization, Property Tax Assessment Appeals, https://www.boe.ca.gov/proptaxes/asmappeal.htm. Reviewed 2026-07-16.
Source: Colusa County, Board of Supervisors, https://www.countyofcolusaca.gov/206/Board-of-Supervisors. Reviewed 2026-09-22.
Source: Colusa County Assessor, Appeals, https://www.countyofcolusaca.gov/90/Appeals. Reviewed 2026-09-22.
Source: Colusa County Board of Supervisors, FAQ: Is the Assessment Appeals Form available online?, https://www.countyofcolusaca.gov/Faq.aspx?QID=76. Reviewed 2026-09-22.
Source: Contra Costa County, Assessor, https://www.contracosta.ca.gov/191/Assessor. Reviewed 2026-09-22.
Source: Contra Costa County Clerk of the Board, Assessment Appeals, https://www.contracosta.ca.gov/2924/Assessment-Appeals. Reviewed 2026-09-22.
Source: County of Alameda, Online Assessment Appeal Application, https://aab.alamedacountyca.gov/. Reviewed 2026-07-16.
Source: County of Fresno, Assessor, https://www.fresnocountyca.gov/Departments/Assessor. Reviewed 2026-09-22.
Source: County of San Mateo, About Assessment Appeals, https://www.smcgov.org/ceo/about-assessment-appeals. Reviewed 2026-09-22.
Source: County of San Mateo, Assessment Appeals Board Portal, https://sanmateotax.my.site.com/AAB. Reviewed 2026-09-22.
Source: County of Santa Clara Office of the Clerk of the Board, Appeal Your Property Taxes, https://cob.santaclaracounty.gov/appeal-your-property-taxes. Reviewed 2026-07-16.
Source: County of Santa Clara Office of the Clerk of the Board, Assessment Appeal Dates and Deadlines, https://cob.santaclaracounty.gov/appeal-your-property-taxes/assessment-appeal-dates-and-deadlines. Reviewed 2026-09-14.
Source: County of Santa Clara Office of the Clerk of the Board, Assessment Appeals Hearing Preparation, https://cob.santaclaracounty.gov/appeal-your-property-taxes/assessment-appeals-hearing-preparation. Reviewed 2026-07-16.
Source: County of Santa Clara Office of the Clerk of the Board, Value Hearing Officers, https://cob.santaclaracounty.gov/appeal-your-property-taxes/resources/assessment-appeals-board/value-hearing-officers. Reviewed 2026-07-16.
Source: Del Norte County, Assessor, https://www.co.del-norte.ca.us/departments/assessor. Reviewed 2026-09-22.
Source: Del Norte County Board of Supervisors, Local Assessment Appeals Board, https://www.co.del-norte.ca.us/departments/BoardOfSupervisors/BoardofEqualization. Reviewed 2026-09-22.
Source: El Dorado County, Clerk of the Board of Supervisors, https://www.eldoradocounty.ca.gov/County-Government/Board-of-Supervisors/Clerk-of-the-Board-of-Supervisors. Reviewed 2026-09-22.
Source: El Dorado County Board of Supervisors, Assessment Appeals - Resources and Application, https://www.eldoradocounty.ca.gov/County-Government/Board-of-Supervisors/Assessment-Appeals-Resources-and-Application. Reviewed 2026-09-22.
Source: Fresno County Clerk of the Assessment Appeals Board, Filing Your Assessment Appeal, https://www.fresnocountyca.gov/files/sharedassets/county/v/1/clerk-of-the-board/assessment-appeals/aab-pamphlet-final-filing.pdf. Reviewed 2026-09-22.
Source: Fresno County Clerk of the Board of Supervisors, Assessment Appeals, https://www.fresnocountyca.gov/Departments/Clerk-of-the-Board-of-Supervisors/Assessment-Appeals. Reviewed 2026-09-22.
Source: Glenn County, Assessor's Office, https://www.countyofglenn.net/government/departments/assessor. Reviewed 2026-09-22.
Source: Glenn County, Clerk of the Board of Supervisors, https://www.countyofglenn.net/government/departments/board-supervisors/clerk-board-supervisors. Reviewed 2026-09-22.
Source: Humboldt County, Assessment Appeals Board, https://humboldtgov.org/2323/Assessment-Appeals-Board. Reviewed 2026-09-22.
Source: Humboldt County Assessor, Steps for Filing, https://humboldtgov.org/235/Steps-for-Filing. Reviewed 2026-09-22.
Source: Humboldt County Clerk of the Board, Property Assessment Appeal Application (BOE-305-AH), https://humboldtgov.org/DocumentCenter/View/55825/Property-Assessment-Appeal-Application. Reviewed 2026-09-22.
Source: Imperial County Assessor, Imperial County Assessor's Office, https://assessor.imperialcounty.org/. Reviewed 2026-09-22.
Source: Imperial County Board of Supervisors, Clerk of the Board, Assessment Appeals Board, https://board.imperialcounty.org/assessment-appeals-board/. Reviewed 2026-09-22.
Source: Kern County, Assessor-Recorder, https://www.kerncounty.com/government/departments/assessor-recorder. Reviewed 2026-09-22.
Source: Kern County Clerk of the Board, Assessment Appeals, https://www.kerncounty.com/government/board-of-supervisors/clerk-of-the-board/assessment-appeals. Reviewed 2026-09-22.
Source: Lake County, Assessment Appeal, https://www.lakecountyca.gov/1153/Assessment-Appeal-. Reviewed 2026-09-22.
Source: Lake County Clerk of the Board, Assessment Appeal Application (BOE-305-AH), https://www.lakecountyca.gov/DocumentCenter/View/4352. Reviewed 2026-09-22.
Source: Lassen County, Assessor, https://www.lassencounty.gov/180/Assessor. Reviewed 2026-09-22.
Source: Lassen County, Clerk of the Board of Supervisors, https://www.lassencounty.gov/190/Clerk-of-the-Board-of-Supervisors. Reviewed 2026-09-22.
Source: Los Angeles County Assessment Appeals Board, Assessment Appeals Board Online Services, https://lacaab.lacounty.gov/Home.aspx?cm_type=gnav. Reviewed 2026-07-16.
Source: Los Angeles County Executive Office, Assessment Appeals Services, https://bos.lacounty.gov/Services/Assessment-Appeals. Reviewed 2026-07-16.
Source: Madera County, Assessor's Office, https://www.maderacounty.com/government/assessor. Reviewed 2026-09-22.
Source: Madera County Board of Supervisors, Clerk of the Board, Assessment Appeals Board, https://www.maderacounty.com/government/assessment-appeals-board. Reviewed 2026-09-22.
Source: Marin County Board of Supervisors, Appeal your property tax assessment, https://www.marincounty.gov/departments/board/appeal-your-property-tax-assessment. Reviewed 2026-09-22.
Source: Marin County Board of Supervisors, Property tax assessment appeals, https://www.marincounty.gov/departments/board/property-tax-assessment-appeals. Reviewed 2026-09-22.
Source: Mariposa County, Assessor, https://www.mariposacounty.gov/109/Assessor. Reviewed 2026-09-22.
Source: Mariposa County, Board of Equalization (Assessment Appeals), https://www.mariposacounty.gov/120/Assessment-Appeals. Reviewed 2026-09-22.
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: Merced County Assessor, Assessment Appeals, https://www.countyofmerced.com/180/Assessment-Appeals. Reviewed 2026-09-22.
Source: Merced County Board of Supervisors, Assessment Appeals, https://www.countyofmerced.com/251/Assessment-Appeals. Reviewed 2026-09-22.
Source: Modoc County Assessor, Important Dates, https://www.countyofmodoc.gov/526/Important-Dates. Reviewed 2026-09-22.
Source: Modoc County Clerk of the Board, Assessment Appeals, https://www.countyofmodoc.gov/417/Assessment-Appeals. Reviewed 2026-09-24.
Source: Monterey County Clerk of the Board, Assessment Appeals Application, https://www.countyofmonterey.gov/home/showpublisheddocument/140437/638835095137430000. Reviewed 2026-09-22.
Source: Monterey County Clerk of the Board, Assessment Appeals, Agendas, Applications, Forms & Documents, https://www.countyofmonterey.gov/government/departments-a-h/clerk-of-the-board/assessment-appeals-agendas-applications-forms-documents. Reviewed 2026-09-22.
Source: Napa County Assessor-Recorder-County Clerk, Assessment Appeals Process, https://www.napacounty.gov/154/Assessment-Appeals-Process. Reviewed 2026-09-22.
Source: Napa County Clerk of the Board, Assessment Appeals, https://www.napacounty.gov/1415/Assessment-Appeals. Reviewed 2026-09-22.
Source: Nevada County, Assessment Appeals Board (AAB), https://www.nevadacountyca.gov/840/Assessment-Appeals-Board-AAB. Reviewed 2026-09-22.
Source: Nevada County Clerk of the Board, AAB Fee Schedule, https://www.nevadacountyca.gov/DocumentCenter/View/13669/AAB-Fee-Schedule-PDF. Reviewed 2026-09-22.
Source: Orange County Assessor, Assessment Appeals FAQ, https://www.ocassessor.gov/faqs/assessment-appeals. Reviewed 2026-07-16.
Source: Orange County Clerk of the Board, Appeal Your Property Value, https://cob.oc.gov/appeal-your-property-value. Reviewed 2026-07-16.
Source: Plumas County, Assessor, https://www.plumascounty.us/75/Assessor. Reviewed 2026-09-22.
Source: Plumas County Assessor, Assessment Reviews/Appeals, https://www.plumascounty.us/99/Assessment-ReviewsAppeals. Reviewed 2026-09-24.
Source: Plumas County Board of Equalization, Changed Assessment Appeal Form, https://www.plumascounty.us/DocumentCenter/View/12418. Reviewed 2026-09-24.
Source: Riverside County Assessor-County Clerk-Recorder, Assessment Appeals - Frequently Asked Questions (FAQs), https://www.rivcoacr.org/Assessment-Appeals-FAQ. Reviewed 2026-09-22.
Source: Riverside County Assessor-County Clerk-Recorder, Assessor - County Clerk - Recorder - Assessment Appeals, https://www.rivcoacr.org/AssessmentAppeals. Reviewed 2026-09-22.
Source: Riverside County Board of Supervisors, Rules of Notice and Procedure of the Assessment Appeals Boards of the County of Riverside, https://rivcocob.org/sites/g/files/aldnop311/files/migrated/wp-content-uploads-2018-08-RevisedAABLocalRules-RefundableFilingFee.pdf. Reviewed 2026-09-22.
Source: Riverside County Clerk of the Board, Assessment Appeals Division, https://rivcocob.org/assessment-appeals-division. Reviewed 2026-09-22.
Source: Sacramento County Assessor, Assessment Appeals, https://assessor.saccounty.gov/us/en/assessment-appeals.html. Reviewed 2026-09-22.
Source: Sacramento County Clerk of the Board of Supervisors, Assessment Appeals, https://sccob.saccounty.gov/Pages/AssessmentAppeals.aspx. Reviewed 2026-09-22.
Source: San Benito County, Clerk of the Board of Supervisors, https://www.sanbenitocountyca.gov/government/clerk-of-the-board-of-supervisors. Reviewed 2026-09-22.
Source: San Benito County Clerk of the Board of Supervisors, Assessment Appeals Forms, Applications & Documents, https://www.sanbenitocountyca.gov/government/clerk-of-the-board-of-supervisors/assessment-appeals-forms-applications-documents. Reviewed 2026-09-22.
Source: San Bernardino County Assessor-Recorder-Clerk, San Bernardino County Assessor, https://arc.sbcounty.gov/. Reviewed 2026-09-22.
Source: San Bernardino County Clerk of the Board of Supervisors, Appeal Filing Types, https://assessmentappeals.cob.sbcounty.gov/appealfilingtypes.aspx. Reviewed 2026-09-22.
Source: San Bernardino County Clerk of the Board of Supervisors, Assessment Appeals, https://cob.sbcounty.gov/assessment-appeals/. Reviewed 2026-09-22.
Source: San Bernardino County Clerk of the Board of Supervisors, Forms and General Information, https://cob.sbcounty.gov/assessment-appeals/forms-and-general-information/. Reviewed 2026-09-22.
Source: San Diego County Assessor-Recorder-County Clerk, Assessment Appeals, https://www.sdarcc.gov/content/arcc/home/divisions/assessor/assessment-appeals.html. Reviewed 2026-07-16.
Source: San Diego County Clerk of the Board, Assessment Appeal Filing Guide, https://www.sandiegocounty.gov/cob/aab/filingguide.html. Reviewed 2026-07-16.
Source: San Diego County Clerk of the Board, Assessment Appeals Boards, https://www.sandiegocounty.gov/cob/aab/index.html. Reviewed 2026-07-16.
Source: San Joaquin County, Assessor-Recorder-County Clerk, https://www.sjgov.org/department/assessor/home. Reviewed 2026-09-22.
Source: San Joaquin County Clerk of the Board, Assessment Appeals, https://www.sjgov.org/department/cob/assessment-appeals. Reviewed 2026-09-22.
Source: San Mateo County Assessor-County Clerk-Recorder & Elections, Assessor, https://smcacre.gov/assessor. Reviewed 2026-09-22.
Source: Santa Barbara County Assessor, Assessment Appeals, https://www.countyofsb.org/acr-assessor-assessment-appeals. Reviewed 2026-09-22.
Source: Santa Barbara County Clerk of the Board, Assessment Appeals, https://www.countyofsb.org/ceo-clerk-of-the-board-assessment-appeals. Reviewed 2026-09-22.
Source: Santa Cruz County Clerk of the Board, Assessment Appeals Board, https://www.santacruzcountyca.gov/Departments/ClerkoftheBoard/AssessmentAppealsBoard.aspx. Reviewed 2026-09-22.
Source: Santa Cruz County Clerk of the Board, Assessment Appeals e-File Portal, https://www2.santacruzcountyca.gov/AAB. Reviewed 2026-09-22.
Source: Shasta County Assessor, Important Dates, https://www.shastacounty.gov/assessor/page/important-dates. Reviewed 2026-09-22.
Source: Shasta County Clerk of the Board, Assessment Appeals, https://www.shastacounty.gov/clerk-board/page/assessment-appeals. Reviewed 2026-09-22.
Source: Siskiyou County Assessor-Recorder, Assessment Appeals, https://www.siskiyoucounty.gov/assessor-recorder/page/assessment-appeals. Reviewed 2026-09-22.
Source: Siskiyou County Clerk, Assessment Appeals Board Clerk, https://www.siskiyoucounty.gov/clerk/page/assessment-appeals-board-clerk. Reviewed 2026-09-22.
Source: Siskiyou County Treasurer-Tax Collector, What if I disagree with the assessed value as shown on my tax bill?, https://www.siskiyoucounty.gov/treasurer-taxcollector/faq/what-if-i-disagree-assessed-value-shown-my-tax-bill. Reviewed 2026-09-22.
Source: Solano County, Clerk of the Board, https://www.solanocounty.gov/government/clerk-board. Reviewed 2026-09-22.
Source: Solano County Clerk of the Board, Assessment Appeals, https://www.solanocounty.gov/government/clerk-board/assessment-appeals. Reviewed 2026-09-22.
Source: Sonoma County Board of Supervisors Department, Assessment Appeals, https://sonomacounty.gov/administrative-support-and-fiscal-services/board-of-supervisors/services-and-information/assessment-appeals. Reviewed 2026-09-22.
Source: Sonoma County Board of Supervisors Department, Common Assessment Types and Filing Deadlines, https://sonomacounty.gov/administrative-support-and-fiscal-services/board-of-supervisors/services-and-information/assessment-appeals/common-assessment-types-and-filing-timelines. Reviewed 2026-09-22.
Source: Sonoma County Board of Supervisors Department, Filing an Application | Assessment Appeals, https://sonomacounty.gov/administrative-support-and-fiscal-services/board-of-supervisors/services-and-information/assessment-appeals/filing-an-application. Reviewed 2026-09-22.
Source: Stanislaus County Assessor, Assessment Appeals Information, https://www.stancounty.com/assessor/Appeals.shtm. Reviewed 2026-07-16.
Source: Stanislaus County Assessor, Stanislaus County Assessor, https://www.stancounty.com/assessor/index.shtm. Reviewed 2026-08-09.
Source: Stanislaus County Board of Supervisors, Assessment Appeals Board Rules and Regulations, https://www.stancounty.com/board/aab/pdf/aab-local-rules.pdf. Reviewed 2026-07-16.
Source: Stanislaus County Clerk of the Board, Assessment Appeals, https://www.stancounty.com/board/aab/. Reviewed 2026-07-16.
Source: Stanislaus County Clerk of the Board, Assessment Appeals Frequently Asked Questions, https://www.stancounty.com/board/aab/aab-faq.shtm. Reviewed 2026-07-16.
Source: Sutter County, Assessment Appeals Board No. 1, https://www.sutter.gov/government/county-departments/clerk-recorder/clerk-of-the-board/assessment-appeals-board-1. Reviewed 2026-09-22.
Source: Sutter County Assessor, Assessor Forms & Information, https://www.sutter.gov/government/county-departments/assessor/assessor-forms. Reviewed 2026-09-22.
Source: Tehama County, Assessment Appeals, https://www.tehama.gov/government/departments/clerk-of-the-board/assessment-appeals. Reviewed 2026-09-22.
Source: Tehama County, Clerk of the Board, https://www.tehama.gov/government/departments/clerk-of-the-board/. Reviewed 2026-09-22.
Source: Tehama County Clerk of the Board, Application for Changed Assessment (BOE-305-AH) with Instruction Sheet, https://www.tehama.gov/wp-content/uploads/2025/03/305ah-rev12-05-24.pdf. Reviewed 2026-09-22.
Source: Trinity County, Board of Supervisors, https://www.trinitycounty.org/198/Board-of-Supervisors. Reviewed 2026-09-22.
Source: Trinity County Board of Supervisors, BOS Forms, https://www.trinitycounty.org/199/BOS-Forms. Reviewed 2026-09-22.
Source: Trinity County Clerk of the Board, Assessment Appeal Application, https://www.trinitycounty.org/documentcenter/view/297. Reviewed 2026-09-24.
Source: Tulare County Clerk of the Board, Assessment Appeals, https://tularecounty.ca.gov/clerkoftheboard/assessment-appeals. Reviewed 2026-09-22.
Source: Tulare County Clerk of the Board, Assessment Appeals Documents, https://tularecounty.ca.gov/clerk-board/assessment-appeals-documents. Reviewed 2026-09-22.
Source: Tuolumne County Assessor, Decline in Value / Assessment Appeals, https://www.tuolumnecounty.ca.gov/732/Decline-in-Value-Assessment-Appeals. Reviewed 2026-09-22.
Source: Tuolumne County Board of Supervisors, Property Tax Assessment Appeals, https://www.tuolumnecounty.ca.gov/730/Property-Tax-Assessment-Appeals. Reviewed 2026-09-22.
Source: Yolo County Clerk of the Board, Assessment Appeals, https://www.yolocounty.gov/government/board-of-supervisors/clerk-of-the-board/assessment-appeals. Reviewed 2026-09-22.
Source: Yolo County Clerk of the Board, Assessment Appeals Frequently Asked Questions, https://www.yolocounty.gov/government/board-of-supervisors/clerk-of-the-board/assessment-appeals/assessment-appeals-faqs. Reviewed 2026-09-22.
Source: Yuba County, Clerk of the Board of Supervisors, https://www.yuba.gov/departments/clerk_of_the_board_of_supervisors/index.php. Reviewed 2026-09-22.
Source: Yuba County Clerk of the Board, Assessment Appeals Board No. 2, https://www.yuba.gov/departments/clerk_of_the_board_of_supervisors/assessment_appeals.php. Reviewed 2026-09-22.
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