Basic Facts Property Owners Should Know

Assessor 101

Basic facts property owners should know

From the Assessor’s Office

As you might imagine my office receives literally tens of thousands of questions annually, interestingly enough, mostly dealing with real estate. Questions about home values, reassessments, what happens when a homeowner dies, or better yet, what exactly is the Homeowners’ Exemption?

Nearly half of my approximately 1,200 employees are property appraisers. They appraise everything from homes to commercial buildings to airplanes. Obviously, I value my relationship with Realtors and other real estate professionals. In fact, the Glendale Association of Realtors and the other AORs in Los Angeles County are vital to the job that I do. I find that when we can share resources and information and support one another’s efforts we are far more effective.

Along those lines, I have taken the most common questions and provided the answers for GAOR members to share with your clients and prospective clients:

1.  What is a supplemental tax?

The Supplemental Tax is a bill that reconciles the difference between the taxes owed by the prior owner and those now owed by the new owner.  This amount is prorated from the time of closing escrow until the time the Assessor learns that there is a new owner and the Treasurer-Tax Collector can send a new, up-to-date property tax bill.  To estimate the amount of supplemental taxes for a given property, please visit

2.  What do you do when a property owner dies?

The Los Angeles County Assessor must be notified within 150 days of the date of death by filing the Change in Ownership – Death of Real Property Owner form along with a copy of the death certificate. This must be filed in addition to any notification made to law enforcement, the Coroner, or even the Registrar-Recorder/County Clerk. Failure to notify the Assessor may result in penalties and complicate estate planning. For more information, go to

3.  What exactly is the Homeowners’ Exemption?

This is a property tax savings program that reduces the assessed value of your home by $7,000, which translates to approximately $70 annually off your property tax bill. The home must be your primary residence. You need only file the form one time and the annual savings remains until you sell our home or affirmatively cancel the exemption. Over 30% of homeowners in LA County who qualify have not applied, primarily because they are unaware of this easy-to-access program. For more information go to

4.  Am I protected from reassessment if the property is in a trust?

No.  A trust is essentially a set of instructions on how property is to be disposed of upon the death of its owner. Generally, when the trustor of a revocable living trust passes away, their property transfers to the beneficiaries named in the trust.  Although a trust may identify the recipient of the property – the beneficiary – that beneficiary is still obligated to report the transfer to the Assessor’s Office by filing a Change in Ownership – Death of Real Property Owner within 150 days of the death.  Additionally, if a child or grandchild is inheriting the property, they may seek to have the date of death transfer excluded from change in ownership reassessment by filing a Prop. 19 parent-child or grandparent-grandchild transfer exclusion claim with the Assessor’s Office.  For more information go to

5.  When the Assessor building diagrams are in conflict with those at the City building department, which are correct?

The cities have official plans upon which you should rely.  A discrepancy between the Assessor’s records and the city’s may indicate that there has been unpermitted construction.

6.  When will my property be reassessed?

Property is reassessed when it changes ownership or when new construction occurs.  Examples of new construction include the addition of a pool or accessory dwelling unit (ADU).  When new construction occurs, only that portion of the property that was newly constructed is reassessed; the rest of the property however retains its existing base year value.  As a result, following the completion of new construction, the property will have what is called a “blended” base year value.

These are just a sampling of the questions my office receives every day, but they’re some of the most common. For more information on these issues or any others, visit or call 213-974-3211.


Los Angeles County Assessor Jeff Prang has been in office since 2014. Upon taking office, Prang implemented sweeping reforms to ensure that the strictest ethical guidelines rooted in fairness, accuracy, and integrity would be adhered to in his office, which is the largest office of its kind in the nation with 1,200 employees. It provides the foundation for a property tax system that generates over $17 billion annually.

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