Property Search

A Los Angeles County CA Property Search can help homeowners, buyers, real estate professionals, researchers, and neighboring property owners locate official parcel and assessment information. This guide explains how to search by property address or Assessor’s Identification Number, interpret assessment records, use parcel maps, research ownership-related records, understand changes in assessed value, and contact the appropriate Assessor’s Office when online information does not answer your question.

Start Your Los Angeles County Property Search in the Right Place

The Los Angeles County Assessor’s Office maintains assessment records for real property throughout the county. These records support the county’s property assessment process and help identify taxable property, ownership, parcel boundaries, land value, improvement value, and applicable exemptions.

The official Los Angeles County property search page is the best starting point for most users. It directs visitors to tools for finding detailed property and assessment information. Before beginning, gather as much identifying information as possible, especially the street address or Assessor’s Identification Number.

A typical search may help you locate:

The Assessor’s Identification Number assigned to a parcel
The property’s situs address
Land and improvement assessment values
Parcel characteristics maintained for assessment purposes
Legal or parcel map references
Tax rate area information
Recent assessment changes reflected in county records
Jurisdictional and district boundaries associated with the parcel

Assessor information should be distinguished from property tax billing information. The Assessor establishes taxable values and maintains assessment records, while other county offices calculate, issue, and collect property tax bills. A property search can explain the assessed value connected with a parcel, but it may not show the current amount due on a tax bill.

Search by Address or Assessor’s Identification Number

The Los Angeles County Assessor Portal offers several ways to locate a property. Users can perform a basic search, legal search, map search, or a direct search using an address or Assessor’s Identification Number.

Use the Property Address for a Quick Lookup

An address search is often the easiest option when researching a home, apartment building, commercial property, vacant lot, or nearby parcel. Enter the property location carefully and use the official street name rather than an informal neighborhood description.

For better results:

Enter the street number and street name without unnecessary punctuation.
Check whether the street uses a direction such as North, South, East, or West.
Try the base address if a unit or suite number produces no result.
Confirm that the property is inside Los Angeles County.
Review nearby map parcels when an address covers multiple lots.

An address may not always correspond neatly to a single parcel. Condominium developments, apartment complexes, shopping centers, manufactured home properties, and large commercial sites may contain multiple assessment records. In those situations, the parcel number provides a more precise search.

Use the Assessor’s Identification Number for Precision

The Assessor’s Identification Number, commonly called an AIN, is a unique number used by the Assessor’s Office to identify and track a parcel. It may also be described in older records or professional documents as a mapbook-page-parcel reference.

You may find the AIN on an assessment notice, property tax bill, deed-related document, title report, appraisal, or earlier Assessor record. Searching with the complete AIN reduces the likelihood of confusing properties with similar street addresses.

Use an AIN search when:

A property has no conventional street address
You are researching vacant land
Several parcels share a mailing or site address
A development includes multiple lots
You need to match a record to a legal description
An address search returns several possible results

Try a Legal Search When the Address Is Not Enough

A legal search can be useful when working with recorded descriptions, tract references, parcel maps, subdivisions, or documents that identify land without relying on a modern street address. Legal descriptions can be technical, so match every available number and reference before relying on a result.

When a deed or recorded document covers more than one parcel, search each AIN separately. One transfer document can affect multiple assessment records, and each parcel may have a different land value, improvement value, tax rate area, or exemption status.

Read Property Assessment Results Without Confusing the Numbers

A Los Angeles County property record may display several values and characteristics. These figures serve different purposes and should not automatically be treated as the property’s current sale price.

Separate Land Value From Improvement Value

Property assessment records generally distinguish between land and improvements. The land value relates to the parcel itself. Improvement value generally covers assessable buildings and structures located on the land.

The word “improvements” does not necessarily mean that the owner recently remodeled or upgraded the property. It is an assessment term used for buildings and other assessable structures. A house, garage, commercial building, apartment complex, or other structure may appear under improvement value even when no recent construction occurred.

Do Not Treat Assessed Value as a Listing Price

Assessed value is used in the property taxation system. It is not the same as an asking price, appraised lending value, or guaranteed market value. California’s acquisition-value system can cause two similar neighboring properties to have substantially different assessed values, particularly when they were purchased at different times.

For many properties, assessed value changes are limited by Proposition 13 rules unless a reassessable change in ownership occurs, new construction is completed, or another qualifying event changes the assessment. Because of this structure, an older assessed value may be considerably lower than a recent sale price.

Check the Record Date Before Using Assessment Data

Assessment databases are updated through official administrative processes. Recently recorded deeds, completed construction, ownership changes, parcel divisions, or correction requests may not appear immediately. Always look for the applicable roll year or record date and verify whether a pending change could affect the information.

Explore Parcel Boundaries With the County Map Search

The Assessor Portal’s map tools can help users understand where a parcel is located and how it relates to surrounding lots. Map searches are especially helpful for vacant land, irregular parcels, corner properties, large developments, and locations where several parcels share one site address.

Available map information may include layers for:

Assessor parcels
Cities and unincorporated communities
ZIP Codes
Supervisorial districts
School districts
Assessor map books
Field books
Tax rate areas
Mobile home parks
Oil and gas fields
Public Land Survey System references
Unincorporated zoning layers

Confirm That the Map Matches the Property Record

Begin by searching the address or AIN, then zoom to the parcel and compare the displayed boundaries with nearby streets and lots. Confirm that the AIN shown on the map matches the number in the property record.

A parcel map is useful for identifying assessment boundaries, but it should not be treated as a land survey or a final determination of private boundary rights. Fences, walls, driveways, landscaping, and occupied areas do not always follow the legal parcel line. Boundary disputes or construction decisions may require recorded documents and qualified professional review.

Use Map Layers to Identify the Correct Jurisdiction

A Los Angeles mailing address does not always mean that a property is inside the City of Los Angeles. Many properties are located in another incorporated city or in an unincorporated county community. Map layers can help determine the city, community, district, ZIP Code, and other jurisdictional information tied to the parcel.

This distinction matters when researching permits, zoning, local services, building requirements, and code enforcement. The Assessor’s Office maintains assessment records, but land-use and permitting questions may belong to a city or another county department.

Understand Why a Property’s Assessed Value Changed

The official real property assessment overview explains how ownership transfers, construction, annual adjustments, and supplemental assessments can affect a property record.

Review Change-in-Ownership Reappraisals

When a publicly recorded transfer occurs, the Assessor receives a copy of the deed and determines whether state law requires a reappraisal. When reappraisal is required, the property is generally assessed at its market value as of the applicable change-in-ownership date.

The relevant date is commonly the recording date of the deed. For property acquired through an estate or living trust after an owner’s death, the reappraisal date may be the date of death rather than the date the property is later distributed to a beneficiary.

Not every ownership change produces a reappraisal. Certain transfers may qualify for an exclusion, and transfers between spouses or registered domestic partners generally do not trigger reassessment for property tax purposes. The Assessor reviews the transaction and supporting documents to determine how the law applies.

Check New Construction Assessments

The Assessor receives building permit information and evaluates whether completed work qualifies as assessable new construction. New buildings, additions, and other qualifying structures may add value to the existing assessment. Ordinary repairs or replacement work may not be assessable in the same way.

New construction can affect only part of a property’s assessment. The existing land and improvement base values may remain in place while the newly constructed portion receives a separate value. Partially completed construction may also be assessed as of the January 1 lien date.

Watch for Supplemental Assessments

A change in ownership or completion of new construction can lead to a supplemental assessment under state law. The supplemental assessment reflects the difference between the prior assessed value and the newly established value.

The Auditor-Controller calculates the related supplemental property tax based on the number of months remaining in the fiscal year. The county fiscal year runs from July 1 through June 30. An event occurring between January 1 and May 31 can result in two supplemental assessments: one for the remainder of the current fiscal year and another for the following fiscal year.

Supplemental bills are separate from regular annual property tax bills. They are generally sent directly to the property owner rather than automatically being handled through a mortgage impound account. A buyer should therefore review assessment notices and incoming mail even when regular property taxes are normally paid through a lender.

Research Ownership Information and Public Assessment Records

California law limits the publication of identifying homeowner information online without written permission. As a result, an online property search may show parcel and assessment details without displaying the owner’s name.

The Assessor’s Office maintains records commonly available for public inquiry, including:

Assessment rolls
Assessment maps
Property characteristic information
Market data used for assessment purposes
Lists of property transferred during the previous two years
Organizational exemption claims and supporting records

When the information needed is not available through the portal, use the official Assessor public records request process. The request should identify the desired records as clearly as possible. Include the property address, AIN, relevant year, document type, and a focused description of the material being requested.

Know Which Office Maintains the Record You Need

The Assessor maintains assessment records, but it does not maintain every real estate document. Recorded deeds and other official real estate recordings are generally associated with the Registrar-Recorder/County Clerk. Property tax bills and payment status are handled through the county’s property tax system rather than the assessment search alone.

Before submitting a request, determine whether you need:

An assessed value or property characteristic record
An assessment map
A recorded deed or real estate document
A current property tax bill
A payment history
A zoning or building permit record
A parcel boundary survey

Sending the request to the office that actually maintains the record can prevent delays and incomplete responses.

Fix Common Property Search Problems

No Property Appears Under the Address

Check the street spelling, directional prefix, street type, and city selection. Remove apartment or unit information and search the main address. If the property is vacant, newly created, or part of a large development, search by AIN or use the parcel map.

The Search Shows Several Parcels

A single site can include multiple parcels. Compare each parcel’s map position, AIN, land area, and property characteristics. Do not assume the first result covers the entire property. This is particularly important for commercial centers, apartment projects, hillside lots, agricultural land, and properties assembled from several legal parcels.

The Property Details Look Outdated

Recently recorded transfers and completed construction may still be under review. Confirm the recording date, assessment year, construction completion date, and any notices received from the Assessor. When necessary, submit a property-specific inquiry with supporting documents.

The Owner’s Name Is Missing

Online display restrictions may prevent a homeowner’s identifying information from appearing publicly. Use the appropriate county record-request procedure rather than assuming the property has no recorded owner.

The Parcel Boundary Does Not Match a Fence

Assessment maps identify parcels for assessment administration and should not be used as a substitute for a professional survey. A fence, wall, driveway, or landscaped area can differ from the legal boundary. Review recorded documents and obtain appropriate professional assistance before making construction or access decisions.

Contact the Correct Assessor Office for Property-Specific Help

When the portal does not resolve a property question, use the official Assessor inquiry form. General inquiries are typically answered within one to three business days. Provide the complete property address, AIN, assessment year, and a concise explanation of the issue.

Property owners may also use the district office locator to identify the office assigned to a property. District staff handle valuation questions for residential, commercial, and industrial properties within their service boundaries.

Appointments may be available for ownership services, property transfers, valuation questions, exemptions, mapping services, public records, and specialized property types. The official Assessor appointment system includes options for online and in-person assistance.

Prepare Before Contacting the Assessor

Have the following information ready:

Complete property address
Assessor’s Identification Number
Name shown on the relevant notice or document
Assessment year involved
Recording or transfer date, when applicable
Construction completion date, when applicable
Copy of the assessment notice or related document
A clear explanation of the requested correction or clarification

Effective March 26, 2026, the North District’s Sylmar office closed, and its public services and operations temporarily moved to the Assessor’s headquarters in Downtown Los Angeles. North District property owners may also use the temporary Castaic Library satellite location during its scheduled service days. Review current office information before traveling because locations and service arrangements can change.

Los Angeles County Property Search Offices

Main Office
Kenneth Hahn Hall of Administration
500 W. Temple Street, Room 225
Los Angeles, CA 90012
(213) 974-3211
1 (888) 807-2111

North District Office
Kenneth Hahn Hall of Administration, Room 225
Room 293, Mailing Address
500 W. Temple Street
Los Angeles, CA 90012-2770
(818) 833-6000

North District Castaic Library Satellite Site
27971 Sloan Canyon Road
Castaic, CA 91384
(818) 833-6000

East District Office
1190 Durfee Avenue
South El Monte, CA 91733
(626) 258-6001

South District Office
1401 E. Willow Street
Signal Hill, CA 90755
(562) 256-1701

West Regional Office
6167 Bristol Parkway, Suite 100
Culver City, CA 90230
(310) 665-5300

Beverly Hills Courthouse Office
9355 Burton Way, Suite 400
Beverly Hills, CA 90210
(310) 665-5300

Lancaster Regional Office
251 E. Avenue K-6
Lancaster, CA 93535
(661) 940-6700

Property Data Sales
500 W. Temple Street, Room 291
Los Angeles, CA 90012
(213) 974-3363

Los Angeles County Property Search FAQs

Can I download information for many Los Angeles County parcels at once?

The standard online search is intended mainly for reviewing individual properties. Users who need records covering multiple parcels, such as assessment roll files, apartment building listings, parcel change reports, recent sales lists, publicly owned parcel data, or GIS parcel boundaries, should review the county’s property data sales options. Available formats and charges vary by dataset. Before ordering, identify the geographic area, record type, preferred format, and assessment year needed so the request does not include unnecessary data.

Which property records can be inspected through a public records request?

The Assessor’s Office commonly makes assessment rolls, assessment maps, property characteristic information, market data, organizational exemption claims, supporting documents, and lists of properties transferred during the previous two years available for public inquiry. A request must describe a reasonably identifiable record. Include the Assessor’s Identification Number, property address, relevant year, and specific document type when using the official Assessor public records request process. Requests for recorded deeds or ownership documents may need to be directed to the Registrar-Recorder/County Clerk instead.

Can I search for a property using the owner’s name?

The public-facing Assessor Portal focuses on searches by address, Assessor’s Identification Number, legal description, and map location. California law restricts the online publication of identifying homeowner information without the owner’s written permission. Therefore, an owner’s name may not appear in ordinary online results. Users seeking ownership-related information should follow the appropriate county records procedure rather than repeatedly changing the address search.

How do I identify the Assessor office assigned to a property?

Property valuation work is divided among district offices based on location. Use the official district office locator to find the office responsible for a particular parcel. This is especially useful when requesting help with residential valuation, commercial or industrial assessment, ownership changes, or a property-specific notice. Check the locator before arranging in-person service because office assignments and temporary service locations may change.