San Diego County Property Tax Appeal

Use this guide to find the filing window, appeal office, application, fee caveat, submission methods, informal review option, and hearing preparation notes for San Diego County property tax appeals.

Key Dates

• File a regular 2026 San Diego County assessment appeal between July 2, 2026, and November 30, 2026.¹

Where To File

• File through the San Diego County Clerk of the Board assessment appeals process; the Assessment Appeals Board hears property assessment disputes and is separate from the Assessor office.²

Forms And Fees

• Use San Diego County's Assessment Appeal Application PDF to file a formal appeal. We have not yet found a current San Diego County filing fee or a date when fee details are expected to be published, so we will keep searching and update this guide when we find one.³⁴

Submission Methods

• Print and complete the San Diego County application and forms, then submit them by mail or in person to the Clerk of the Board assessment appeals office.⁵

Informal Review

• Before filing a formal appeal, consider contacting the county assessor if you believe your assessed value is higher than market value. BOE gives that as the statewide first step; we have not yet found a separate San Diego County informal-review procedure or a date when one is expected to be published, so we will keep searching and update this guide if we find one.⁶

Evidence And Hearing Process

• Prepare evidence that supports the value you are requesting. BOE gives this statewide hearing-preparation guidance; we have not yet found separate San Diego County hearing rules or a date when additional rules are expected to be published, so we will keep searching and update this guide if we find them.⁷

What Still Needs Verification

• We have found the San Diego County application PDF and mail or in-person submission instructions, but we have not yet found a current filing fee or a date when fee details are expected to be published. We will keep searching and update this guide when we find the fee information.⁸

Footnotes

1. BOE lists San Diego County with a November 30 deadline, and San Diego County states that fiscal year 2025-2026 appeals may be filed between July 2, 2026, and November 30, 2026. Sources: California BOE LTA 2026/023 Regular Assessment Filing Periods, San Diego County Clerk Of The Board Assessment Appeals Page. ↩

2. San Diego County describes the Assessment Appeals Board as independent from the Assessor office. Source: San Diego County Clerk Of The Board Assessment Appeals Page. ↩

3. San Diego County provides an Assessment Appeal Application PDF from its Property Tax Assessment Appeals page. Source: San Diego County Clerk Of The Board Assessment Appeals Page. ↩

4. BOE says some counties may charge a filing or processing fee and instructs taxpayers to check with the county clerk of the board to find out whether fees apply. Sources: San Diego County Clerk Of The Board Assessment Appeals Page, California BOE Assessment Appeals FAQ. ↩

5. San Diego County says applications and forms can be printed, completed, mailed in, or submitted in person to the Clerk of the Board assessment appeals office. Source: San Diego County Clerk Of The Board Assessment Appeals Page. ↩

6. BOE recommends contacting the county assessor first when a taxpayer believes market value is lower than assessed value. Source: California BOE Assessment Appeals FAQ. ↩

7. BOE says taxpayers should be prepared to present evidence supporting the requested value. Source: California BOE Assessment Appeals FAQ. ↩

8. San Diego County provides application and submission instructions, and BOE says to check with the county clerk of the board for fee details. Sources: San Diego County Clerk Of The Board Assessment Appeals Page, California BOE Assessment Appeals FAQ. ↩