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Property tax rules change by state, county, and deadline. Always check the official source before you apply.

Los Angeles County Homeowners’ Exemption and Assessment Appeals

If Your Los Angeles County Assessment Looks Wrong, Start Here

A wrong property record, a missing Homeowners’ Exemption, or a high assessed value can all raise your Los Angeles County property tax bill. But they are not handled the same way.

For an exemption or a property record problem, start with the Los Angeles County Assessor. For a formal value dispute, use the Los Angeles County Assessment Appeals Board. For payment due dates, penalties, tax bills, and collection problems, use the Los Angeles County Treasurer and Tax Collector.

Do not wait for one office to fix every part of the problem. A correction request, an informal review, a formal appeal, and a tax payment deadline may all run on different clocks.

Last reviewed: May 16, 2026.

The Three Problems People Mix Up

Los Angeles County homeowners often use the word “appeal” for any property tax problem. That can cause missed deadlines. A missing Homeowners’ Exemption or wrong property record usually starts with the Assessor. A dispute over assessed value may require an informal Assessor review or a formal appeal. A payment, penalty, lien, or collection issue belongs with the Treasurer and Tax Collector.

Important: An appeal is not the same as a payment plan. Filing an assessment appeal does not mean you can ignore the tax bill. Los Angeles County says annual secured tax bills are mailed on or before November 1. The first installment is due November 1 and becomes delinquent after December 10. The second is due February 1 and becomes delinquent after April 10. Late penalties can apply if payment is not received or properly postmarked on time. Check the county’s annual secured tax bill guide before assuming an appeal pauses payment.

What the Los Angeles County Assessor Does

The Los Angeles County Assessor is the office that maintains the assessed value and many property record details used on the tax roll. The Assessor is also the place to start for the Homeowners’ Exemption, decline-in-value review, and disaster-related reassessment.

For a specific parcel, use the Assessor property search. You can usually search by address or Assessor’s Identification Number, often called the AIN. The AIN is important because many county forms and tax bill pages use it to identify the property.

Things to check before you file anything

  • The AIN on your tax bill or notice.
  • The assessed value for the current year.
  • Whether the Homeowners’ Exemption appears.
  • The mailing address and property description.
  • The date printed on each notice or bill.

Save copies of notices, envelopes, screenshots, tax bills, closing papers, deeds, photos, repair records, and appraisals. Appeals are decided on facts and evidence.

The Los Angeles County Homeowners’ Exemption

California’s Homeowners’ Exemption is a property tax exemption for a qualifying owner-occupied home. The California State Board of Equalization says the exemption provides a $7,000 reduction in taxable value for a qualifying home that was the owner’s principal place of residence on the January 1 lien date. The homeowner must make a one-time filing with the county assessor, using claim form BOE-266.

Los Angeles County’s Assessor says that if you own a home and it is your principal place of residence on January 1, you may apply for a $7,000 exemption from assessed value. The county also says new property owners are automatically sent a Homeowners’ Property Tax Exemption Claim Form, listed by the county as BOE-266/ASSR-515, and the exemption may also apply to a supplemental assessment if the prior owner did not claim it. Start with the county’s Homeowners’ Exemption page.

This is an exemption from assessed value, not a direct check. A $7,000 exemption does not mean the tax bill drops by $7,000. It reduces the taxable value used for part of the property tax calculation. Some charges on a Los Angeles County bill are direct assessments or special charges, and those may not be reduced by the Homeowners’ Exemption.

Who may qualify

You may be looking at the right program if you own or co-own a Los Angeles County home, use it as your principal residence, and occupied it as your principal residence on the January 1 lien date for the year involved. You also should not be receiving a conflicting exemption on another principal residence.

Trusts, estates, manufactured homes, partial ownership, divorce, death of an owner, new construction, supplemental assessments, and moves during the year can be more complicated. Ask the Assessor before assuming you qualify or do not qualify.

When to file

The State Board of Equalization says a first-time claimant may file after the property or claimant becomes eligible, but no later than February 15 to receive the full exemption for that year. A Board of Equalization taxpayer information sheet says a claim filed after February 15 but on or before December 10 may receive 80 percent of the exemption, and no current-year exemption can be allowed if filed after December 10. Confirm the current filing instruction with the Los Angeles County Assessor before relying on a late filing.

If you stop being eligible, do not ignore it. The State Board of Equalization says Homeowners’ Exemption claimants are responsible for notifying the assessor when they are no longer eligible, and December 10 is the last day to terminate the exemption without penalty.

What you may need

Have the AIN, property address, owner name, purchase or transfer date, move-in date, and any supplemental assessment notice ready. If the record involves a trust, estate, or ownership change, keep those papers with your file.

If the Exemption Is Missing From Your Bill

First, make sure you are looking at the right line on the tax bill. Los Angeles County’s annual secured tax bill guide shows an exemption line and a net taxable value line. It also shows direct assessments that are not based on the Assessor’s valuation.

If you believe the exemption should be there, contact the Assessor. Ask whether the county has a Homeowners’ Exemption claim on file, whether it was accepted, and whether it applies to the annual roll, a supplemental assessment, or both. If the Assessor says you need to file or refile, ask which form is required and what deadline applies to the year you are trying to fix.

Do not assume the tax bill will be fixed before the payment deadline. If the payment due date is close, contact the Treasurer and Tax Collector separately about payment options, penalties, and what happens if a corrected bill is issued later.

When the Problem Is the Assessed Value

If your issue is the value, ask a different question: what was the taxable value or market value on the correct date?

In California, assessed value is not always the same as today’s sale price. Proposition 13 generally limits annual increases to the assessed value, but reassessment can happen after a change in ownership or new construction. Proposition 8 decline-in-value rules can also allow a temporary reduction when the current market value falls below the factored base-year value.

The Assessor’s contesting assessed value page explains that a decline in value happens when the current market value is less than the current assessed value as of January 1 for the year involved. That January 1 date matters. A later sale, later appraisal, or later damage may not prove the value for the assessment date unless it helps show what the property was worth on that date.

The informal route: decline-in-value review

Los Angeles County allows an informal Assessor review for a decline in value. The Assessor says you must file a Decline-in-Value Review Application, form RP-87, between July 2 and November 30 for the fiscal year beginning July 1. The county says applications are valid if postmarked by November 30. If November 30 falls on a Saturday, Sunday, or legal holiday, a filing or postmark by the next business day may be treated as valid under the county’s rule.

This informal review can be useful when you think the property was worth less than the enrolled value on January 1. But it is not the same as a formal appeal. The Assessor warns that, to preserve formal appeal rights, you must file an application with the Assessment Appeals Board during the open filing period.

Evidence that may help

Useful evidence may include comparable sales near January 1, photos of condition problems, repair estimates, inspection reports, an appraisal, closing papers, permits, zoning limits, easements, and the county notice you are disputing. Do not build your case only around hardship. The appeal board is deciding value and assessment issues.

The Formal Assessment Appeal in Los Angeles County

The Los Angeles County Assessment Appeals Board is separate from the Assessor. The Board of Supervisors says the Assessment Appeals Boards and hearing officers conduct hearings on disputes between taxpayers and the Assessor to establish assessed value on the county property tax roll. The Board acts in a quasi-judicial role and decides disputes based on evidence and the law.

Use the official Assessment Appeals Board online filing site if you want to file online or check current filing information. For paper filing, the Board’s resources page lists the Assessment Appeal Application AAB-100 and related forms.

Regular assessment filing period

For regular assessments, Los Angeles County’s Assessment Appeals Board lists the filing period as July 2 to November 30 each year for real and personal property assessments. The same county page says that if the final filing date falls on a Saturday, Sunday, or legal holiday, an application mailed and postmarked on the next business day is treated as timely.

Check the official Board site for the tax year you are appealing.

Supplemental, adjusted, roll change, and escape assessments

Different notices can have different clocks. Los Angeles County lists these filing periods:

  • Supplemental assessments: within 60 days of the mailing date printed on the supplemental notice or tax bill, or the postmark date of the notice or bill, whichever is later.
  • Roll change, adjusted, and escape assessments: within 60 days of the mailing date printed on the notice or adjusted/escape assessment tax bill, or the postmark date, whichever is later.
  • Misfortune or calamity reassessments: within six months after the mailing date of the proposed reassessment notice.

If you received one of these notices, do not wait for the regular July 2 to November 30 window unless the Board tells you that is the correct filing period. Your deadline may be tied to the mailing or postmark date on the specific notice.

Filing fee and fee waiver

Los Angeles County says a $46 non-refundable filing fee applies to assessment appeal applications. A fee waiver may be requested if paying the fee would cause undue financial hardship. Check the official Board page before filing because procedures can change.

What an Appeal Can and Cannot Fix

A formal appeal is mainly about whether the assessed value, change in ownership determination, new construction assessment, penalty assessment, or other appealable assessment issue is correct. It usually will not fix a missed exemption filing, a payment problem, a late-payment penalty, a mortgage escrow issue, direct assessments, special taxes, Mello-Roos charges, or hardship by itself.

If the value is wrong and the exemption is also missing, you may need to contact the Assessor about the exemption and file a formal appeal about the value. Those are separate tasks.

Disaster Notes for Los Angeles County Property Owners

Los Angeles County has a disaster relief process for property damaged or destroyed by misfortune or calamity, such as a fire, flood, or earthquake. The Assessor’s disaster relief page says an Application for Reassessment of Property Damaged or Destroyed by Misfortune or Calamity, form ADS-820, must be filed within 12 months from the date the property was damaged or destroyed, and the loss must exceed $10,000 of current market value.

The California State Board of Equalization gives the same general disaster rule under Revenue and Taxation Code section 170: if the county has adopted the required ordinance, the assessor may reappraise the property to reflect its damaged condition. The Board also says the owner must file within the county’s time limit or 12 months from the damage or destruction, whichever is later, and the loss estimate must be at least $10,000 of current market value.

Disaster reassessment is not the same as a normal assessment appeal. It is also not the same as property tax postponement. It may temporarily reduce the assessed value because the property was damaged. If the Assessor issues a proposed disaster reassessment and you disagree with it, Los Angeles County lists a separate appeal period of six months after the mailing date of the proposed reassessment notice.

Disaster deadline caution: If your property was damaged, keep photos, insurance documents, repair estimates, fire or incident reports, and the date of damage. File with the Assessor as soon as you can. Also contact the Treasurer and Tax Collector if a payment deadline is near. A disaster claim does not automatically erase every payment duty.

A Safe Step-by-Step Path

Start by finding the AIN, assessed value, exemption line, mailing address, and notice dates. If the Homeowners’ Exemption is missing, contact the Assessor. If the value is wrong as of January 1, consider the Assessor’s decline-in-value review and file a formal appeal on time if you want to preserve appeal rights.

Use the Treasurer and Tax Collector for payment questions. Save confirmation numbers, mailing receipts, screenshots, copies of forms, and postmarked envelopes.

If You Are Late, Denied, or Confused

If you missed an exemption deadline, ask the Assessor what can still be done for the current year and future years. California rules can limit late relief, and prior-year exemptions may not be available in many situations.

If your assessment appeal deadline passed, ask the Assessment Appeals Board whether any filing option remains for your type of notice. Do not assume the regular filing period applies to supplemental or adjusted bills. Also ask whether the problem is better handled by the Assessor as a clerical, ownership, or exemption record issue.

If you were denied, read the denial or decision carefully. Look for the reason, the date, the office that issued it, and any appeal or correction instructions. Call or write the office that issued the notice. Ask what rule was used and what documents would change the result.

If you are behind on taxes or facing penalties, contact the Treasurer and Tax Collector. If you receive a lien, tax sale, or foreclosure-related notice, consider contacting a qualified legal aid office, housing counselor, or attorney. PTRG cannot give legal advice, and deadlines in collection matters can be serious.

Official Offices to Use

Use the Los Angeles County Assessor for exemptions, assessed value, property records, decline-in-value review, and disaster reassessment. Use Los Angeles County Assessment Appeals or the online appeal portal for formal appeals. Use the Treasurer and Tax Collector for bills, payments, penalties, and collection questions. Use the Property Tax Portal when you need county-wide tax bill guidance or office links.

Terms That Matter

Exemption: A reduction in taxable assessed value, such as the Homeowners’ Exemption.

Assessment appeal: A formal request for the Assessment Appeals Board to decide whether an assessment is correct.

Decline-in-value review: An informal Assessor review when market value is below the factored base-year value as of January 1.

Disaster reassessment: A reassessment after qualifying damage from a misfortune or calamity.

Deferral or postponement: A delay in payment. These programs can involve liens, interest, and repayment duties. Read official terms before using one.

Rebate or credit: A refund-like or tax-credit program. The Los Angeles County Homeowners’ Exemption is not a renter rebate or cash refund program.

Editorial Note

This guide was written as independent general information for Property Tax Relief Guide. It uses official Los Angeles County and California property tax sources where possible, with high-trust sources used only for context when needed. PTRG is not a government agency, law firm, tax office, tax-prep company, or appeal service. Property tax rules, forms, fees, deadlines, and office procedures can change. Before applying, appealing, paying late, or relying on a deadline, confirm the current rule with the official county or state office that handles your issue.