Appeal deadlines
2026-07-02 to 2026-09-15: For regular lien-date / decline-in-value assessment appeals, applications are filed with the county clerk of the board during the annual filing period. Santa Clara County’s official Assessor page states that appeal applications must be filed between July 2 and September 15. The California State Board of Equalization confirms that lien-date / decline-in-value filing periods are July 2 to either September 15 or November 30 depending on the county, and directs taxpayers to check the county deadline.
Annual regular assessment roll / lien-date or decline-in-value appeal period
No subdivision was indicated by official sources for Santa Clara County’s regular assessment appeal filing window; the deadline is countywide for regular lien-date / decline-in-value appeals. Direct inspection was performed on the BOE official FAQ. Direct inspection of the Santa Clara County Assessor and Clerk official URLs was attempted as required, but both returned Cloudflare blocking / browser domain-limit errors; official hosted search excerpts supplied the county-specific July 2 to September 15 window. This row covers the regular annual assessment appeal / Proposition 8 decline-in-value appeal window. Supplemental, escape, and calamity reassessment appeals use notice-based deadlines and would require the individual notice mailing date.
2026-07-02 to 2026-09-15: Regular assessment appeals must be filed between July 2 and September 15. Supplemental or escape assessment appeals must be filed within 60 days of the notice date or postmark, whichever is later.
For regular assessments, fixed annual filing window. For supplemental or escape assessments, date of Notice of Supplemental Assessment or Notice of Enrollment of Escape Assessment, or postmark, whichever is later.
No subdivision was needed: official county and state sources establish a countywide regular assessment appeal filing window for Alameda County rather than different deadlines by municipality, township, or assessment district. The Alameda County Assessor official page was searched and direct inspection was attempted as required, but the official site returned a 403/domain-limit error. Final support therefore also relies on the directly inspected Alameda County Clerk page, the directly inspected official Alameda County instruction booklet, and the directly inspected California State Board of Equalization page. The exact 2026 regular assessment appeal window is July 2, 2026 through September 15, 2026. Supplemental and escape assessment deadlines are trigger-based and cannot be reduced to a single countywide date without the individual official notice date or postmark.
2026-07-02 to 2026-11-30: For regular assessments, filing dates are July 2 to November 30 of each year for all real and personal property assessments. If the final filing date falls on a Saturday, Sunday, or legal holiday, a mailed application postmarked on the next business day is deemed timely. The online filing site states the 2026 Regular Assessment filing deadline ends November 30, 2026 at 12 midnight PST.
No subdivision required: official Los Angeles County sources state a countywide regular assessment filing period for all real and personal property assessments. Supplemental, roll-change/adjusted, escape, and calamity reassessment appeals have separate trigger-based windows tied to notice/bill mailing dates; this row reports the current 2026 regular assessment appeal window requested at the county level.
2026-05-29 to 2026-07-13: File a real property assessment appeal within 45 days of the assessment notice date; the 2026 annual notice inspected shows notice date May 29, 2026 and appeal deadline July 13, 2026. County resources also state assessment notices are mailed in late May and the appeal deadline is 45 days from notice.
2026 annual assessment notice date / mailing date, May 29, 2026
No subdivision was required: official county sources state a county assessment-notice rule and the inspected 2026 DeKalb annual notice shows the same countywide 2026 deadline date, July 13, 2026. Appeal_start_date is the notice/trigger date printed on the inspected 2026 annual assessment notice, May 29, 2026; the 45-day rule and July 13, 2026 deadline align with the official calculator result.
2026-06-05 to 2026-07-20: Property owner may file a written appeal with the county Board of Tax Assessors no later than 45 days after the annual assessment notice date; Cobb County sources state appeals must be received or USPS-postmarked within 45 days of the notice date. The 2026 Cobb deadline located in current search results is July 20, 2026; applying the official 45-day period implies a June 5, 2026 notice/start date.
Annual Assessment Notice Date / notice date printed on the assessment notice
Direct inspection was attempted for Cobb Assessor real-property appeal materials and appeal-process PDF; both were blocked by Cloudflare/anti-bot. Direct inspection of the Cobb County tax-assessor support page returned an official page but with no extractable text. The Georgia DOR official notice template was directly inspected and supports the 45-day rule and notice/deadline fields. The exact 2026 deadline of 2026-07-20 was found in current search results from secondary sources, not in directly inspectable official Cobb text. Because the official Cobb FAQ and Georgia DOR sources establish the 45-day rule, the start/notice date was computed as 45 days before 2026-07-20, yielding 2026-06-05. No official source found or inspected indicated that Cobb County’s 2026 assessment appeal deadline varies by municipality, tax district, township, or other subunit; the rule is countywide for annual assessment appeals filed with the Cobb County Board of Tax Assessors.
2026-06-15 to 2026-07-30: Appeal must be filed/postmarked within 45 days from the mailing/date on the Annual Notice of Assessment.
2026 Notices of Assessment reportedly began mailing June 15, 2026; the appeal window is 45 days from the notice mailing/date.
Direct inspection of Cherokee County assessor and communications pages was attempted, but the official cherokeecountyga.gov pages returned Cloudflare blocking through the inspection proxy; the 2025 official county PDF was directly reachable and inspected. Search-discovered official county pages did not expose an exact 2026 Cherokee County notice mailing PDF or current-year notice document with a printed appeal deadline. A current official county communications result supports that the appeal period begins when notices are mailed and is 45 days; third-party search discovery reported Cherokee 2026 mailing began June 15, 2026. Using that trigger gives July 30, 2026. Because the exact June 15, 2026 trigger was not directly confirmed in an inspectable official Cherokee County document, confidence is medium rather than high. No official source indicated deadlines vary by municipality, township, or assessment district; the rule is county assessment-notice based.
2026-06-16 to 2026-07-31: Property owners have a 45-day period to appeal their Notice of Assessment; appeals must be filed before the appeal deadline printed on the notice. Fulton County states that the 2026 appeals deadline for most property owners is Friday, July 31, 2026, unless another date is specifically printed on the Notice of Assessment.
Date of the Notice of Assessment / notice-specific printed appeal deadline; Fulton County 2026 notices were available online and mailed to property owners, with most notices using the July 31, 2026 deadline.
The countywide 2026 source gives an exact deadline for most property owners but preserves a notice-specific exception where another date is printed on an individual notice. No official source inspected listed separate concrete municipal, township, or assessment-district deadlines, so no subdivision was triggered. The official FultonAssessor.org pages were attempted but blocked by Cloudflare/proxy policy; the parallel official FultonCountyGA.gov Board of Assessors pages were reachable and directly inspected. Appeal start date was inferred from the official 45-day period and official July 31, 2026 deadline using the date calculator: 45 calendar days before July 31, 2026 is June 16, 2026.
2026-06-16 to 2026-07-31: Real-property assessment appeals may be filed only in response to an Annual Assessment Notice and must be filed with the Chatham County Board of Assessors within 45 days of the notice/postmarked date. For 2026, the current-year official trigger found was the June 16, 2026 mailing/notice date; 45 calendar days after that date is July 31, 2026.
2026 Notices of Assessment mailed/issued June 16, 2026.
No official Chatham County page inspected directly listed the exact 2026 appeal deadline or 2026 notice-mailing date. The official county BOE and BOA pages establish the controlling countywide rule: 45 days from the assessment notice/postmarked/notice date, filed with the Board of Assessors. A current-year official PDF lead from the Chatham County BOA site was attempted but could not be inspected due to connection timeout / browser domain-limit error. Search results and inspected official BOA/BOE pages did not indicate that appeal deadlines vary by municipality, township, or other subunit, so no subdivision was triggered. The 2026 trigger date and exact deadline are supported by a current 2026 news report attributing the June 16, 2026 notice mailing and July 31, 2026 appeal deadline to county officials; the deadline also computes exactly as 45 days after June 16, 2026. Confidence is medium because the exact 2026 trigger/deadline source is secondary, while the rule and filing body are official county sources.