Appeal a property assessment in Santa Clara County, CA

County government

Clerk of the Board — public records

Assessment appeal — application, current fees and hearing preparationOfficial instructions

Santa Clara County formal assessment appeals, category-specific fees effective June 2026, online application and hearing resources.

Before you start · 6 requirements & conditions

Payments · Application processing fee: Pay by cash, check, money order or credit card; coins are not accepted. Credit cards add 2.22%, with a $1.49 minimum per transaction.
Source & saved evidence
Santa Clara County · Santa Clara — assessment appeals information (opens in a new tab)
Assessment appeals — Application processing fee
Payment will be accepted by cash, check, money order, or credit card. Coins not accepted. Credit card payments include a 2.22% service fee with a minimum of $1.49 per transaction.
Agent source review: October 15, 2026 · Snapshot 074ecf1dfda48573
Information & documents · Hearing evidence — board versus hearing officer: Bring six extra evidence copies for Boards I–IV, or four extra copies for a Value Hearing Officer.
Source & saved evidence
Santa Clara County · Santa Clara — hearing preparation and access (opens in a new tab)
Assessment appeals — Hearing evidence — board versus hearing officer
Assessment Appeals Boards I, II, III and IV require six (6) extra copies of each document that the applicant plans to submit as evidence. Value Hearing Officers require four (4) extra copies of each document that the applicant plans to submit as evidence.
Agent source review: October 15, 2026 · Snapshot 9b1ba3f8d04a7cea
Accessibility · Free language interpretation — advance request: Request free language interpretation at (408)299-5001 at least three business days before the hearing.
Source & saved evidence
Santa Clara County · Santa Clara — hearing preparation and access (opens in a new tab)
Assessment appeals — Free language interpretation — advance request
If the applicant does not have a language interpreter, language interpretation services are available free of charge. Please contact the Office of the Clerk of the Board at (408) 299-5001 no less than three (3) business days prior to the Assessment Appeals Hearing to request language interpretation service.
Agent source review: October 15, 2026 · Snapshot 9b1ba3f8d04a7cea
Deadlines · 2026 regular assessment appeals only: For Santa Clara County’s 2026 regular assessment appeal, file July 2 through September 15, 2026. Other appeal types have separate, notice-based deadlines.
Source & saved evidence
California State Board of Equalization · 2026 county assessment-appeal filing periods (opens in a new tab)
BOE LTA2026/023 — page2, 2026 county filing deadline table
County Assessment Appeals Filing Periods for 2026 The clerks of county assessment appeals boards and county boards of equalization have certified the assessment appeals filing period for their counties pursuant to the requirements of Revenue and Taxation Code section 1603. The regular appeals filing period in each county will begin on July 2, 2026, and will end either on September 15, 2026, or November 30, 2026, depending on whether the County Assessor has elected to mail assessment notices to all taxpayers with property on the secured roll by August 1, 2026. The following table shows the filing deadline for each county: FILING FILING COUNTY COUNTY DEADLINE DEADLINE Alameda September 15 Orange November 30 Alpine September 15 Placer September 15 Amador November 30 Plumas November 30 Butte November 30 Riverside November 30 Calaveras November 30 Sacramento November 30 Colusa November 30 San Benito November 30 Contra Costa November 30 San Bernardino November 30 Del Norte November 30 San Diego November 30 El Dorado November 30 San Francisco September 15 Fresno November 30 San Joaquin November 30 Glenn November 30 San Luis Obispo September 15 Humboldt November 30 San Mateo November 30 Imperial November 30 Santa Barbara November 30 Inyo September 15 Santa Clara September 15 Kern November 30 Santa Cruz November 30 Kings September 15 Shasta November 30 Lake November 30 Sierra September 15 Lassen November 30 Siskiyou November 30 Los Angeles November 30 Solano November 30 Madera November 30 Sonoma November 30 Marin November 30 Stanislaus November 30 Mariposa November 30 Sutter November 30 Mendocino November 30 Tehama November 30 Merced November 30 Trinity November 30 Modoc November 30 Tulare November 30 Mono September 15 Tuolumne November 30 Monterey November 30 Ventura September 15 Napa November 30 Yolo November 30 Nevada November 30 Yuba November 30
Agent source review: October 15, 2026 · Snapshot c80e564097ddf0c2
Information & documents · County-specific formal appeal application: Use the BOE-305-AH application provided by the county where the property is located; a generic sample is not a valid filing.
Source & saved evidence
California State Board of Equalization · Assessment appeal FAQ (opens in a new tab)
BOE assessment appeals FAQ
You must file an Assessment Appeal Application, form BOE-305-AH, obtained from the clerk of the board of the county where your property is located. Some counties have this form available on the website of either the clerk of the board or the county assessor, or both. You must use the county application for the appeal to be considered a valid filing.
Agent source review: October 15, 2026 · Snapshot 92069ed341a828bf
Payments · Taxes while an appeal is pending: Pay property taxes on time while an appeal is pending to avoid penalties and interest. Filing an appeal does not suspend tax payments.
Source & saved evidence
California State Board of Equalization · Assessment appeal FAQ (opens in a new tab)
BOE assessment appeals FAQ
Yes. You are required to pay your property taxes timely despite any appeal you have pending. Failure to do so will result in financial penalties and interest charges regardless of the outcome of your appeal. If you are granted a reduction, you will receive a refund and interest.
Agent source review: October 15, 2026 · Snapshot 92069ed341a828bf