Property Search

A Los Angeles County property search can help homeowners, buyers, real estate professionals, researchers, and other members of the public locate assessment information tied to a specific parcel. This article explains which county office maintains property assessment records, how to search by address or Assessor’s Identification Number, how map and legal searches differ, what information may be available, when another county department may be responsible, and how to request help when an online search does not answer your question.

Property Search Office Responsibilities

The Los Angeles County Assessor’s Office is responsible for locating taxable property in the county, identifying ownership for assessment purposes, establishing taxable values, completing the assessment roll, and applying legal exemptions. Its records cover real property and personal property subject to county assessment.

The Assessor’s Office should be the primary starting point when a search concerns parcel identification, assessed land value, assessed improvement value, property characteristics, assessment maps, ownership information maintained for assessment purposes, or the district office assigned to a property.

The Assessor does not perform every county property-related function. A property assessment search is different from reviewing a tax bill, confirming whether taxes were paid, obtaining a recorded deed, or requesting another recorded real estate document. Recognizing these differences can prevent delays and keep a request from being sent to the wrong office.

Assessment Records Versus Tax Bills

Assessment records describe how the Assessor identifies and values a property. Property tax billing information is handled through separate county tax systems. The Assessor’s records may show land and improvement values, while the property tax bill applies tax rates, bonded indebtedness, direct assessments, and other charges to the taxable value.

A property owner who believes an assessed value or property characteristic is incorrect should begin with the Assessor. A person looking for the amount owed, a duplicate tax bill, or payment information should use the county’s property tax services instead of treating the Assessor Portal as a tax payment system.

Assessment Records Versus Recorded Documents

The Assessor receives information from recorded transfers and uses that information for assessment purposes. However, a property search result is not the same as an official copy of a deed or another recorded real estate document. Property ownership information and recorded real estate records may also need to be requested from the Los Angeles County Registrar-Recorder/County Clerk, depending on the record sought.

Online Property Search Options

The county provides more than one online entry point for property information. The official Assessor property search page directs users to available property and assessment resources. It also provides current service notices and access to office information.

For detailed parcel and assessment information, users can open the Los Angeles County Assessor Portal. The portal supports several search approaches, including basic, legal, address, Assessor’s Identification Number, and map-based searches.

Address Search

An address search is often the simplest method when the property’s street location is known. The search should use the property location rather than a mailing address belonging to the owner, property manager, lender, or other party.

Address formatting can affect search results. Users should verify the street number, street name, directional prefix or suffix, and unit information before assuming that no record exists. A parcel may also cover more than one street address, or an address may be associated with a larger parcel containing several buildings or units.

When an address search produces several possible matches, compare the parcel details, map location, city or community, and other available property characteristics before relying on the record. Similar street names and repeated street numbers can create incorrect matches in a county with many cities and unincorporated communities.

Assessor Identification Number Search

The Assessor’s Identification Number, commonly called an AIN, uniquely identifies a parcel in the Assessor’s system. It may also be described through its map book, page, and parcel components. Searching by AIN is usually more precise than searching by street address because it directs the system to a specific parcel record.

An AIN may appear on assessment notices, property tax documents, or prior county property records. Users should enter the complete number and confirm that every digit matches the parcel they intend to research. A single incorrect digit can lead to a different parcel or no result.

The AIN identifies the parcel used for assessment. It should not be confused with a tax bill number, recorded document number, escrow number, loan number, permit number, or case number from another government system.

Legal Search

A legal search may be useful when the available information comes from a legal description rather than a commonly used street address. Legal descriptions can refer to subdivisions, lots, blocks, tracts, portions of land, or other recorded property boundaries.

Users should copy legal information exactly from the source document. Abbreviating or omitting part of a legal description may produce an incomplete or incorrect result. When the legal description is lengthy or covers multiple parcels, an online search may need to be supplemented with an assessment map or assistance from the Assessor’s Office.

Map Search

Map search is useful when a user knows the approximate location of a property but does not have a confirmed address or AIN. It can also help clarify parcel boundaries, neighboring parcels, and the relationship between a street address and the assessed parcel.

The Assessor Portal’s map resources may include parcel boundaries and geographic reference layers. Available map layers can help users view areas by cities, unincorporated communities, ZIP Codes, school districts, supervisorial districts, tax rate areas, map books, field books, mobile home parks, and other geographic categories maintained by the county.

Map boundaries should be reviewed in context. An Assessor parcel map supports assessment administration, but users should not assume that an online map independently resolves private boundary disputes, easements, title questions, or surveying issues.

Information Shown in Records

The information associated with a parcel can vary. The Assessor’s Office maintains records for assessment purposes, and commonly available records may include the assessment roll, assessment maps, property characteristics, market data used in assessment work, organizational exemption claims and supporting documents, and lists of property transferred during specified periods.

A parcel record may provide information such as:

Assessor’s Identification Number
Property location or situs address
Assessed land value
Assessed improvement value
Property characteristics maintained by the Assessor
Assessment map references
Ownership information available under applicable public-record restrictions

In assessment terminology, “improvements” generally include assessable buildings and structures on the land. The term does not necessarily mean that the current owner recently remodeled or upgraded the property.

Limits on Online Owner Names

California law restricts the online publication of identifying information such as a homeowner’s name without the owner’s written permission. As a result, an online parcel record may not display all ownership information a user expects to see.

The absence of an owner’s name from an online result does not by itself mean the parcel lacks an ownership record. Ownership information may need to be requested through an appropriate county process or obtained from recorded real estate records maintained by the Registrar-Recorder/County Clerk.

Property Characteristics

Property characteristics maintained by the Assessor are used for assessment work. Users should compare the displayed information with the correct parcel and avoid assuming that every detail shown in another document or real estate listing will appear in the Assessor’s public search.

If a property characteristic appears incorrect, prepare the parcel’s AIN, property address, and a specific explanation of the disputed information before contacting the Assessor. A focused inquiry is easier to route than a general request stating only that the property record is wrong.

How Assessments Can Change

Property search results are closely connected to the county’s assessment process. The Assessor’s real property assessment overview explains how ownership changes, new construction, annual adjustments, and supplemental assessments may affect a property’s assessed value.

Change in Ownership

When a publicly recorded property transfer occurs, the Assessor receives a copy of the deed and determines whether state law requires reappraisal. The reappraisal date is generally the recording date of the deed that transfers ownership.

Property acquired through an estate or living trust may be treated differently. In those situations, the reappraisal date may be the date of the former owner’s death rather than the date when the property is later distributed to a beneficiary.

Not every ownership-related transfer causes reappraisal. The reference information identifies transfers between spouses and registered domestic partners, including certain transfers resulting from death, divorce, or termination of a domestic partnership, as transfers that do not cause reappraisal for property tax purposes. Certain other exclusions may also apply under state law.

New Construction

The Assessor receives copies of building permits and reviews new buildings, additions, and other structures for assessment. The value of assessable new construction is added to the existing improvement value. Structural repairs or replacement work are not appraisable in many situations.

A property search may therefore show a value change after new construction is completed or partially completed as of the January 1 lien date. Property owners who receive notice of a newly assessed value have the right to appeal if they disagree with that value.

Supplemental Assessments

A change in ownership or completed new construction may generate a supplemental assessment. The supplemental assessment reflects the difference between the prior value and the new value. The Auditor-Controller calculates the related supplemental property tax and prorates it according to the number of months remaining in the fiscal year.

The county fiscal year runs from July 1 through June 30. An ownership change or completion of new construction between January 1 and May 31 can result in two supplemental assessments and two supplemental tax bills: one for the remainder of the current fiscal year and another for the following fiscal year.

Notices of assessed value change are sent before supplemental tax bills are issued. Supplemental bills are separate from the regular annual tax bill and are sent directly to the property owner rather than to an impound account.

Preparing a Reliable Search

Collecting accurate identifying information before opening the portal reduces the risk of selecting the wrong parcel. The most useful information depends on the search method, but users should generally prepare as much of the following as is available:

The complete property street address
The city or unincorporated community
The Assessor’s Identification Number
A legal description, when applicable
A prior assessment notice or property tax document
The specific assessment year or transaction being researched
A clear description of any property characteristic in question

Users researching multiple properties should keep each AIN and address paired with the correct record. Copying information into a separate list without preserving that connection can cause data from one parcel to be attributed to another.

Confirming the Correct Parcel

Before using information from a search result, confirm that the AIN, property location, and map position all refer to the intended parcel. This is especially important for condominiums, mobile home properties, apartment complexes, commercial sites, vacant land, and properties with multiple addresses.

A street address may identify a building or entrance rather than every assessed parcel connected to the site. Conversely, one parcel may contain multiple structures or addresses. The parcel identifier and assessment map provide a stronger basis for distinguishing records than an address alone.

Search Result Timing

Assessment records may change after recorded transfers, construction activity, appraisal work, ownership review, or annual roll processing. A recently completed transaction may not immediately appear in every public-facing record.

When researching a recent ownership change, users should keep the recording date, document information, and relevant assessment notices available. Those details can help the Assessor identify the transaction when a public search result still reflects earlier information.

Common Property Search Errors

Using a Mailing Address

A property owner’s mailing address may differ from the property’s situs address. Searching the mailing address can produce an unrelated parcel or no result. The online address search should generally use the location of the property being assessed.

Confusing Parcel Numbers

The AIN should not be replaced with a tax bill number, deed recording number, permit number, loan number, or another agency’s reference number. When a document contains several identifiers, look for language identifying the Assessor’s parcel or identification number.

Assuming Tax Information Is Included

The Assessor Portal focuses on property and assessment information. It should not be treated as proof that a property tax payment was made or as a substitute for the official property tax billing system.

Expecting Full Ownership Details Online

Online owner information is restricted by state law. Users who need ownership records should not assume that repeated searches will reveal information that the county is prohibited from publishing online.

Relying on One Search Field

An unsuccessful address search does not always mean that no parcel record exists. A user who has an AIN should search by that number. A user with an uncertain address may need the map search, legal search, or district office assistance.

Skipping Parcel Verification

Similar addresses, adjoining parcels, and multi-parcel developments can produce plausible but incorrect results. The parcel number and map location should be confirmed before assessment values or property characteristics are used for another purpose.

Assistance From the Assessor

When the portal does not resolve a question, the Assessor’s Office offers online inquiries, appointments, telephone service, and in-person assistance. The correct service channel depends on the type of question.

For a general inquiry that is not about a specific property address, users may submit the Assessor’s online contact form. The form requests a name, email address, phone number, explanation of the request, and an optional PDF or DOCX attachment. The stated response period is one to three business days.

Questions tied to a particular parcel are better supported by including the full property address and AIN. Attachments should directly relate to the issue, such as an assessment notice or another document needed to explain the request.

Assigned District Office

Residential and commercial-industrial valuation inquiries may be handled according to district boundaries. The Assessor district office locator helps users identify the office assigned to a property.

Using the assigned district can be particularly useful for questions about assessed value, property characteristics, and appraisal activity. It also reduces the possibility that an inquiry will need to be transferred between offices.

Appointments and Service Categories

The Assessor provides both Microsoft Teams and in-person appointment options. The appointment scheduling page organizes requests by subject so they can be directed to the appropriate service area.

Available appointment categories include ownership services, district valuation questions, homeowners’ exemptions, disabled veterans’ exemptions, major exemptions, mapping services, data sales, public service inquiries, major real properties, marine and aircraft matters, mobile homes, and certain business personal property subjects.

Choose the category that matches the actual issue. A question about a parcel boundary map should not be scheduled as an exemption appointment, and a property ownership transfer question should not be classified as a general valuation inquiry.

Office Visits

Current addresses, service hours, and temporary operating arrangements are provided on the official Assessor office locations page. Most listed regional offices operate Monday through Friday from 8:00 a.m. to 5:00 p.m., except county holidays. Some locations have different schedules and final line-entry times.

The Beverly Hills Courthouse office operates Tuesday through Thursday from 8:00 a.m. to 4:00 p.m., except county and Superior Court holidays, with customers required to be in line by 3:45 p.m. The temporary Castaic Library satellite site operates on Mondays and Fridays from 10:00 a.m. to 5:00 p.m., except county holidays, with customers required to be in line by 4:45 p.m.

North District Service Changes

The North District office in Sylmar closed effective March 26, 2026. North District public services and operations temporarily moved to the Assessor’s headquarters at the Kenneth Hahn Hall of Administration in downtown Los Angeles.

North District property owners may also visit the temporary Castaic Library satellite site while permanent North District arrangements are pending. Because office operations can differ by location, users should review the official office page before traveling.

Mail for the temporarily relocated North District uses a separate room designation from the public service counter. Users sending documents should use the mailing information shown for that office rather than assuming the public counter room is also the mailing destination.

Public Records Requests

The Assessor maintains many records for assessment purposes. Under the California Public Records Act and applicable county ordinances and policies, members of the public may request to inspect reasonably identifiable records.

The Assessor public records request page identifies records commonly available for public inquiry, including assessment rolls, assessment maps, recent property transfer lists, organizational exemption claims and supporting documents, market data, and information maintained on property characteristics.

A public records request should identify the record as specifically as possible. Useful details may include the AIN, property address, record type, assessment year, date range, and the particular information requested. Broad requests without identifiable property or record details may require additional clarification.

The Assessor’s stated policy is not to charge for duplicating routine records. Specialized products, multi-parcel files, subscription access, and data sales are handled separately and may involve charges.

Multi-Property Data Requests

A normal property search is designed for research involving an individual parcel or a limited number of properties. Users seeking countywide files, sales lists, parcel change reports, assessment roll products, mailing labels, GIS parcel data, or other multi-property information should use the Assessor’s Data Sales service.

The Assessor maintains assessment records for more than two million parcels across the county. Multi-parcel products can include secured roll information, parcel boundary data, apartment building listings, cross-reference rolls, sales lists, publicly owned parcel files, unsecured assessment data, and other specialized records.

Data Sales requests are different from general questions about one property. Users should not direct a single-parcel value or property characteristic inquiry to the multi-property sales contact unless they are requesting a data product offered by that unit.

Property Search Offices

Los Angeles County Assessor Headquarters
Kenneth Hahn Hall of Administration
500 W. Temple Street, Room 225
Los Angeles, CA 90012-2770
(213) 974-3211
(888) 807-2111

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

Property Search FAQs

Can I search Assessor records by an owner’s name?

The free public Los Angeles County Assessor Portal primarily supports searches by property address, Assessor’s Identification Number, legal description, or map location. A separate subscription-based Property Database Inquiry System can index records by assessee name, situs address, or AIN. That system is intended for remote record-by-record viewing and is not a downloadable or relational database. California restrictions on publishing homeowner names online may still affect which identifying details are publicly displayed.

Is there a paid database for frequent property research?

Yes. The Assessor offers a fee-based Property Database Inquiry System for users who need continuing remote access to individual public property records. Subscribers view one property record at a time through an internet or VPN connection. This service is different from the free Assessor Portal and from bulk parcel-data purchases. Users should review the current access requirements, account charges, and inquiry fees on the official Property Data Sales page before requesting access.

Can I obtain parcel data for an entire city or neighborhood?

Large-scale research requires a multi-property data product rather than repeated individual searches. Available products may include parcel boundary files, apartment building listings, secured assessment files, sales lists, publicly owned parcel records, cross-reference rolls, and parcel-change reports. Some datasets are offered electronically, on physical media, or through specialized online access. Product coverage, update schedules, file formats, and charges vary, so confirm that the selected dataset includes the geographic area and record fields needed for the project.

Does the Assessor ask how requested records will be used?

The official Assessor public records request form asks whether records are for private use, a media inquiry, or sale or distribution. Providing an accurate purpose and identifying the requested parcel, record category, and date range can help the county route the request correctly. Requests for commercial datasets may be handled through Data Sales instead of the routine public-record process.