Guide 03 · Assessor records

How to read a Los Angeles County assessor record

Updated October 8, 2026 · Educational guide

An assessor record combines identifying, physical, and assessment information for a parcel. It is valuable for research, but it is not a title report, inspection, appraisal, survey, building permit history, or an official statement of market value.

Parcel identity fields

Start with the situs address, AIN, APN if shown, and the assessor map reference. Confirm these against the property you intend to research. Addresses can be formatted differently and a single parcel can relate to multiple addresses, units, or improvements.

Building and use fields

Year built, square footage, bedroom and bathroom counts, units, design codes, and use codes are assessor data fields. They can be blank, rounded, stale, or incomplete—especially for unusual, mixed-use, recently altered, or multi-structure properties. A mismatch does not by itself prove the public record is wrong.

Assessed value is not market value

Assessment fields often separate land value, improvement value, fixtures, personal property, and exemptions. Their sum is an assessed value used in the property-tax system. It should not be treated as a current sale price, an appraisal, a loan value, or an estimate of replacement cost.

A sensible cross-check

1. Confirm the parcel identity with the Assessor portal.
2. Review the current tax information in the County Property Tax Portal.
3. For material decisions, compare against recorded documents, permit records, a survey, an appraisal, or advice from the relevant qualified professional.