Start with the Los Angeles County filing window
Los Angeles County lists July 2 through November 30 as the regular assessment filing period each year. Supplemental, adjusted, and escape assessments generally carry a separate 60-day window tied to the notice or tax bill, so identify the assessment type before calendaring the case.
The county currently charges a $46 nonrefundable filing fee for an assessment appeal application. Written findings of fact have a separate and substantially higher fee, so review the current county fee schedule before requesting them.
Define the market before choosing comparable sales
Los Angeles County contains many unrelated housing markets, including coastal, hillside, valley, urban condominium, planned-community, and inland suburban areas. A countywide or even citywide radius can mix properties with different school access, views, wildfire exposure, traffic, lot utility, zoning, condition, and buyer demand.
Start from the assessor's parcel record, then check property type, living area, improvements, ownership event, condition, land characteristics, and the value being appealed. A small and explainable comparable set is more useful than a long download of loosely related sales.
- Use arm's-length sales that help establish market value as of January 1 for the year under appeal.
- Keep condominiums, townhomes, detached homes, small income property, and luxury property in defensible market segments.
- Explain view, slope, fire-risk area, busy-street, renovation, lot-utility, and location differences sale by sale.
- State the assessed value and one applicant opinion of value accurately on the application.
Match the application to the assessment type
A regular decline-in-value appeal asks whether market value on January 1 fell below the taxable value. A supplemental or base-year dispute usually follows a change in ownership or new construction, while escape, calamity, and penalty assessments follow their own notices and rules.
Read the notice before selecting a box on BOE-305-AH. The filing period, value date, available remedy, and evidence can change with the assessment type, and one application should not blur unrelated issues.
Prepare for the hearing and keep taxes current
The Assessment Appeals Board is separate from the Assessor and decides from the evidence presented. Filing an informal review or discussing the value with the Assessor does not replace a timely board application, and the applicant should continue paying property taxes while the appeal is pending.
Keep the filed application, proof of submission, assessor record, sale sheets, photographs, repair support, valuation explanation, and hearing correspondence together. Follow the county's current exchange deadlines and present the requested value as a conclusion supported by the exhibits rather than as a target chosen first.