Property Tax Portal
About the Assessor
What the Assessor Does
Message from the Assessor
Public Inquiry Form
Rate Our Service
Request a Speaker
Your Property Taxes
How the Property Tax System Works
Property Tax Overview
Areas of Responsibility
Message to Homeowners
Senior Citizen Transfers
Supplemental Tax Estimator
Death of Real Property Owner
- Business Personal Property
- Natural Resources
- New Construction
Tax Savings Programs
Exemptions, Exclusions & Tax Relief
Senior Citizens Exclusion
Decline of Property Value
Property Taken by Eminent Domain
Severely and Permanently Disabled
Institutional Property Tax Exemption
Personal Property & Possessory Interests
Personal Property Assessments
Boats & Aircraft
News & Legislation
Reports & Publications
Assessment Roll Forecast
Strategic Plan [Revision in Progress]
Real Estate Fraud
Data For Sale
Online Property Database Access
LA County Human Resources
Decline-in-Value – What is it?
Printable Brochure (Click here)
In 1978, California voters passed Proposition 8, a constitutional amendment that allows a temporary reduction in assessed value when a property suffers a “decline-in-value.” A decline-in-value occurs when the current market value of your property is less than the current assessed value as of January 1.
You must demonstrate that on January 1, the market value of your property was less than its current assessed value.
You must file a
Decline-in-Value Review Application
, form RP-87, with the Assessor between June 1 and November 30 for the fiscal year beginning on July 1. Applications are valid if postmarked by November 30. If November 30 falls on a Saturday, Sunday, or a legal holiday, an application is valid if either filed or postmarked by the next business day.
On your claim form, provide the Assessor with information that supports your opinion that the market value for your property is less than the assessed value. The best supporting documentation is information on sales of comparable properties. You should select two comparable sales that sold as close to January 1 as possible, but no later than March 31. You may query the Assessor’s database for sales in your neighborhood by
. While the submission of comparable sales is helpful for the Assessor in determining the market value of your property, applications submitted without comparable sales will be accepted and processed.
An appraiser will review your claim form and the information you provide. Other sales information available to the Assessor may also be considered. If the market value as of January 1 is less than the trended base value
, your assessed value will be lowered to the market value for the fiscal year beginning on July 1. The adjusted value will be reflected on your annual tax bill.
If the current market value is higher than the trended base value, no change in assessed value will be made.
If you disagree with the Assessor’s findings, you may file an appeal with the Assessment Appeals Board. You must file your appeal between July 2 and November 30 for your annual tax bill.
A property was purchased for $500,000. During a three-year period, the real estate market declined and recovered. The property owner filed for a decline-in-value reassessment. The following table shows the trended base value of the property, the market value of the property, and the assessed value of the property. Assumimg a 2% Annual C.P.I.:
Base Value Trended
Frequently Asked Questions
Do properties other than single family residences qualify?
Yes. All real property qualifies.
What is a comparable sale?
A property sold with features that are similar to your property is a comparable sale. Comparable sales information helps you analyze the value of your home. For example, a property similar in location, zoning, size, number of bedrooms and bathrooms, age, quality and condition to yours that sold in the open market is a
Where can I find comparable sales information?
A good place to start is online. The Assessor’s website offers sales information for properties that have sold within the last two years. The same information is available from any Assessor District Office. Also, many websites offer sales information free of charge. A local real estate agent or title agent can also be a valuable source of information.
I filed my Decline-in-Value Application by November 30. When and how will I know if my value will be reduced?
You will receive notification by mail before July 1.
If my assessed value is reduced, how long will it last?
Decline-in-value reassessments are not permanent, but last at least one year. The assessed value may decrease or increase depending on the market value of your property on January 1 of each subsequent year. Your assessed value will never increase more than the trended base value. It is important to remember, however, that base year values suspended by decline-in-value reassessment values continue to increase by an annual inflation factor of no more than 2% per year.
How Do I File for a Decline-in-Value?
A claim form is available from several sources. Choose what is most convenient for you.
Online: Forms are available at the Assessor’s website:
Email: Send us an email at
Phone: Call (213)974-3211
Claim forms may also be requested by mail or in person at any of
listed in this brochure.
What Form Do I Need?
Decline-in-Value Review Application
Available from June 1 – November 30
To read the law associated with Proposition 8, see Revenue and Taxation Code, Section 51. It is available online at
Property is assessed at the time of sale or transfer (base value) or new construction. That base value increases a maximum of 2% (trend) each year (i.e. trended base value).
Conditions of Use
About This Site
Office of the Assessor, County of Los Angeles - All Rights Reserved