Los Angeles County Property Tax Appeal

Use this guide to find the filing window, appeal office, forms, fees, submission paths, informal review options, and hearing preparation notes for Los Angeles County property tax appeals.

Key Dates

• File a regular 2026 Los Angeles County assessment appeal between July 2, 2026, and November 30, 2026.¹
• If you are appealing a supplemental or escape assessment, calculate the deadline from the notice or tax bill date; BOE guidance generally uses a 60-day filing window for those appeals.²

Where To File

• Start a formal Los Angeles County property tax appeal through the Los Angeles County Assessment Appeals Board website.³

Forms And Fees

• Use the Los Angeles County AAB-100 application if you are filing by mail or in person, or use Applicant Login if you are filing online. The county states that assessment appeal applications require a $46 non-refundable filing fee when submitted, with fee-waiver forms available for applicants who qualify.⁴⁵

Submission Methods

• You can file online through Applicant Login, or download the printable AAB-100 form for mail or in-person submission from the Assessment Appeals Board website.⁶⁵

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 Los Angeles 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.⁷

Evidence And Hearing Process

• Prepare evidence that supports the value you are requesting. BOE explains that the appeals board or hearing officer hears evidence from both sides before deciding value; we have not yet found separate Los Angeles-specific 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.⁸

What Still Needs Verification

• Before submitting, recheck the AAB-100 form, filing fee, fee-waiver requirements, and online, mail, or in-person instructions on the Los Angeles County Assessment Appeals Board website because filing details can change.⁵

Footnotes

1. BOE lists Los Angeles with a November 30 deadline, and the Los Angeles County Assessment Appeals Board states that the 2026 regular assessment filing deadline ends November 30, 2026. Sources: California BOE LTA 2026/023 Regular Assessment Filing Periods, Los Angeles County Assessment Appeals Board. ↩

2. BOE explains that supplemental and escape assessment appeals generally must be filed within 60 days of the supplemental assessment notice mailing date, or within 60 days of the supplemental tax bill if no notice was sent. Source: California BOE Assessment Appeals FAQ. ↩

3. The Los Angeles County Assessment Appeals Board website presents the county's online filing and tax-agent registration website. Source: Los Angeles County Assessment Appeals Board. ↩

4. The Los Angeles County Assessment Appeals Board states that assessment appeal applications require a $46 non-refundable filing fee when submitted. Source: Los Angeles County Assessment Appeals Board. ↩

5. The Los Angeles County Assessment Appeals Board provides AAB-100 access, fee-waiver guidance, and online, mail, and in-person submission paths. Source: Los Angeles County Assessment Appeals Board. ↩ ↩² ↩³

6. The Los Angeles County Assessment Appeals Board instructs online applicants to use Applicant Login. Source: Los Angeles County Assessment Appeals Board. ↩

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

8. BOE explains that a county appeals board or hearing officer hears evidence from both parties and that taxpayers should be prepared to present evidence for the requested value. Source: California BOE Assessment Appeals FAQ. ↩