Clerk of the Board — Assessment Appeals Unit
Assessment appeals board function; provider and jurisdiction must be verified.
Source checked October 15, 2026[4]www.acgov.org
Opens this office’s own website. CountyWiki does not process applications, take payments or provide personal records.
Contact details & office locations ↓Online services & information
These links were found on official source pages. Each service is handled by the office.
Alameda County assessment appeal applications, hearing resources and fee-waiver information. Filing an appeal and requesting Assessor property information are different services.
Before you start
- Information & documents · Paper application — duplicates and current county form
- Submit paper applications in duplicate using the county’s current prescribed form. The county’s FY 2026–2027notice specifies BOE305-AH(P1)REV12(05-24). [7]
- Information & documents · Paper versus electronic signature channels
- Paper filings require original signatures; e-file signatures use the county’s DocuSign process. These are separate filing channels. [8]
- Deadlines · 2026 regular assessment appeals only
- For Alameda County’s 2026 regular assessment appeal, file July 2 through September 15, 2026. Other appeal types have separate, notice-based deadlines. [1]
- 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. [2]
- 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. [3]
County-linked assessment appeal portal; review application and signature requirements before filing.
Fees
Fees are quoted only when a source document supports the amount and conditions.
| Service | Amount | Conditions & source |
|---|---|---|
| Assessment appeal — processing fee | $50.00per application | Non-refundable processing fee due at filing; county fee-waiver request available. Current FY 2026–2027notice prints no fee-effective day.[11] |
These are individual fee items, not a quote for your total. Other charges or exemptions may apply; confirm the total with the office.
Forms & documents
Official forms and document pages for this office’s services.
- County assessment appeal application (opens in a new tab)PDF[12]
- Assessment appeal filing notice — current county link (opens in a new tab)PDF[13]
- Request to waive assessment appeal processing fee (opens in a new tab)PDF[14]
- Assessment appeal instruction booklet — Chinese (opens in a new tab)PDF[15]
- Assessment appeal instruction booklet — Spanish (opens in a new tab)PDF[16]
Sources & last checked4 source pages · 16 citations
Sources were checked by an AI-assisted research process. A checked website does not mean every service or fee on it has been reviewed.
- [1] 2026 county assessment-appeal filing periods (opens in a new tab)
California State Board of Equalization · BOE LTA2026/023 — page2, 2026 county filing deadline table
Source reviewed October 15, 2026View supporting excerpt
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
- [2] Assessment appeal FAQ (opens in a new tab)
California State Board of Equalization · BOE assessment appeals FAQ
Source reviewed October 15, 2026View supporting excerpt
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.
- [3] Assessment appeal FAQ (opens in a new tab)
California State Board of Equalization · BOE assessment appeals FAQ
Source reviewed October 15, 2026View supporting excerpt
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.
- [4] Alameda — assessment appeals information (opens in a new tab)
Alameda County · Assessment appeals — 06001
Source reviewed October 15, 2026View supporting excerpt
The Clerk, Board of Supervisor's Assessment Appeals Unit receives and processes assessment appeal applications
- [5] Alameda — assessment appeals information (opens in a new tab)
Alameda County · Assessment appeals — Assessment appeal applications and hearing resources
Source reviewed October 15, 2026View supporting excerpt
The Clerk, Board of Supervisor's Assessment Appeals Unit receives and processes assessment appeal applications
- [6] Alameda — assessment appeals information (opens in a new tab)
Alameda County · Assessment appeals — File or manage an assessment appeal online
Source reviewed October 15, 2026View supporting excerpt
Online Assessment Appeal Application
- [7] Alameda County — assessment appeal filing-notice (opens in a new tab)
Alameda County · County original PDF — page 1; Paper application — duplicates and current county form
Source reviewed October 15, 2026View supporting excerpt
Paper applications must be COMPLETED IN DUPLICATE and returned to the Cl er k of t he Boar d, Assessment Appeals Board Unit before the filing deadline. You are required to use Alameda County’s current application BOE-305-AH (P1) REV. 12 (05-24).
- [8] Alameda County — assessment appeal filing-notice (opens in a new tab)
Alameda County · County original PDF — page 1; Paper versus electronic signature channels
Source reviewed October 15, 2026View supporting excerpt
If you file a paper application, your application or the separate Agent’s Authorization must be submitted with original signatures. If you e-file, all signatures are obtained using DocuSign.
- [9] Alameda — assessment appeals information (opens in a new tab)
Alameda County · Assessment appeals — Assessment Appeals Unit — application and hearing questions
Source reviewed October 15, 2026View supporting excerpt
(510) 272-3854
- [10] Alameda County — assessment appeal filing-notice (opens in a new tab)
Alameda County · County original PDF — page 1; Assessment Appeals Board — paper application mailing
Source reviewed October 15, 2026View supporting excerpt
1221 Oak Street, Suite 536, Oakland, CA 94612.
- [11] Alameda County — assessment appeal filing-notice (opens in a new tab)
Alameda County · County original PDF — page 1; Assessment appeal — processing fee
Source reviewed October 15, 2026View supporting excerpt
A non-refundable application Processing Fee of $50 per application must be paid at the time of filing the application.
- [12] Alameda — assessment appeals information (opens in a new tab)
Alameda County · Assessment appeals — County assessment appeal application
Source reviewed October 15, 2026View supporting excerpt
Assessment Appeal Application
- [13] Alameda — assessment appeals information (opens in a new tab)
Alameda County · Assessment appeals — Assessment appeal filing notice — current county link
Source reviewed October 15, 2026View supporting excerpt
Notice: Assessment Appeal Application
- [14] Alameda — assessment appeals information (opens in a new tab)
Alameda County · Assessment appeals — Request to waive assessment appeal processing fee
Source reviewed October 15, 2026View supporting excerpt
Request to Waive Nonrefundable $50 per Parcel Assessment Appeal Application Processing Fee
- [15] Alameda — assessment appeals information (opens in a new tab)
Alameda County · Assessment appeals — Assessment appeal instruction booklet — Chinese
Source reviewed October 15, 2026View supporting excerpt
Assessment Appeals Board Instruction Booklet - Chinese
- [16] Alameda — assessment appeals information (opens in a new tab)
Alameda County · Assessment appeals — Assessment appeal instruction booklet — Spanish
Source reviewed October 15, 2026View supporting excerpt
Assessment Appeals Board Instruction Booklet - Spanish