Property Tax Appeals in Lassen County, California
Lassen County's Clerk of the Board of Supervisors page lists Assessment Appeals Information among its resources, linking to the Rules of Notice and Procedure for the Lassen County Assessment Appeals Board and to the Assessment Appeal Application, rather than printing the regular-roll filing window as page text. The California State Board of Equalization's certified 2026 filing-period table lists Lassen County's regular filing period as ending November 30, 2026. The Clerk of the Board's page does not state a dollar filing fee for the application. Contact for the Clerk of the Board's office is listed as 220 South Lassen Street, Annex, Susanville, CA 96130, phone 530-251-8217, with Deputy Clerk of the Board Michele Yderraga reachable at 530-251-8427. 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, or communicate with the Assessor's Office or the Board on the owner's behalf.
Assessment context: Begin with the Assessor's parcel record and confirm the current regular-roll filing dates directly with the Clerk of the Board, since Lassen County's own Clerk of the Board page does not print fixed dates and instead points to the posted Rules of Notice and Procedure and application for current details. Lassen County occupies California's northeastern high desert and volcanic plateau, anchored by the county seat of Susanville along the Susan River, with Lassen Volcanic National Park's peaks to the southwest, Eagle Lake's ranching and recreation country to the northwest, and expansive high-desert rangeland reaching toward the Nevada border. A property a few miles away can sit in a very different ranchland, forested, or volcanic-terrain setting, so land use and access should be confirmed against the Assessor's record rather than assumed from a map.
Filing process: Lassen County's Clerk of the Board of Supervisors page provides the Assessment Appeal Application as a downloadable PDF alongside the Rules of Notice and Procedure for the Lassen County Assessment Appeals Board, and directs appeal-related contact to the Clerk of the Board's office at 220 South Lassen Street, Annex, Susanville, CA 96130, phone 530-251-8217. The Assessor's Office, at 107 S. Roop St., Susanville, CA 96130, phone 530-251-8241, maintains the parcel record and online parcel search an owner would review before filing. The Clerk of the Board's page does not describe an online e-filing system separate from the downloadable application. The page does not state a dollar filing fee for the Assessment Appeal Application.
Evidence to review: Lassen County's Clerk of the Board page links to the Rules of Notice and Procedure for the Lassen County Assessment Appeals Board, which governs how evidence is presented and considered at a hearing, rather than describing evidence rules directly on the page itself. Build a comparable-sales table showing sale date, price, parcel, community, lot size, living area, age, and condition, and weight it toward sales near the January 1, 2026 lien date, since California law generally excludes comparable sales occurring more than 90 days after that date. For ranchland or high-desert parcels around Eagle Lake or the Susanville area, document acreage, water access, and any condition issues with dated photographs, since land use and terrain vary widely across Lassen County's volcanic-plateau geography.
Current deadline guidance: 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. The Board of Equalization lists Lassen among the counties whose 2026 regular filing period ends November 30, 2026; file with the Lassen County Clerk of the Board of Supervisors as its Assessment Appeals page describes. That page does not itself print the regular-roll date range; it instead links to the Rules of Notice and Procedure for the Lassen County Assessment Appeals Board and to the Assessment Appeal Application for the current filing details.
The Board of Equalization's certified table lists Lassen County's 2026 regular filing period as ending November 30, 2026; Lassen's own Clerk of the Board page does not print the date range and instead points to its posted rules and application.
Lassen County's Clerk of the Board page does not state a dollar filing fee for the Assessment Appeal Application.
The Clerk of the Board's Assessment Appeals Information links to the county-specific Rules of Notice and Procedure rather than generic state guidance alone.
Lassen County spans Susanville's high desert plateau, Lassen Volcanic National Park's peaks, and ranching country around Eagle Lake toward the Nevada border.
Official filing authority: Lassen County Clerk of the Board of Supervisors. https://www.lassencounty.gov/190/Clerk-of-the-Board-of-Supervisors
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: Lassen County, Assessor, https://www.lassencounty.gov/180/Assessor. 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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