Correct the State, Find the AIN, Then Read the Tax Record
Searching for “LA County Auditor, OH” mixes two different systems. Los Angeles County is in California, and its Auditor-Controller is not the county office that performs the main public parcel lookup. Start with the Los Angeles County Assessor when you need a property address, AIN, value, land, building or parcel map.
Then use the Auditor-Controller when the question involves the tax calculation, Tax Rate Area, direct assessment, corrected tax roll or a refund caused by an assessed-value change. This guide shows the complete path so you do not bounce between agencies without knowing which one can actually solve the problem.
Quick answer: which LA County office should you use?
Parcel, AIN, value or property characteristics → Assessor. Tax calculation, Tax Rate Area or direct assessment → Auditor-Controller. Bill, payment or delinquency → Treasurer & Tax Collector. Deed, mortgage or recorded document → Registrar-Recorder/County Clerk.
Important LA County property facts
To perform the parcel lookup, open the Assessor Portal, choose Basic Search or Map Search, enter the ten-digit AIN or property address, and verify the result before using the value or tax data.
Jump directly to your property question
Each section below finishes a specific task rather than sending you through a generic link directory.
Did you mean Los Angeles County, California or an Ohio county?
Use California systems throughout this article.
- Assessor for parcel records and values
- Auditor-Controller for tax computation
- Treasurer for payment
- Recorder for deeds
Do not use LA County links merely because the keyword includes “Auditor, OH.”
- Read the county name on the tax bill or deed.
- Open the Ohio county auditor directory.
- Select the real Ohio county.
- Use that county’s parcel-search system.
Find an LA County parcel by AIN or address
The live Assessor Portal supports Basic Search, Legal Search and Map Search. For most homeowners, the fastest path is a ten-digit AIN or a property address.
Search by AIN
Search by street address
Why an LA County property may not appear
Understand the Assessor record before using it
Field |
What it means |
What to do next |
|---|---|---|
AIN |
Ten-digit Assessor Identification Number. |
Use it across Assessor and property-tax research. |
Situs Address |
Assessor’s location reference for the property. |
Do not automatically treat it as a legal or mailing address. |
Use Type / Use Code |
Recorded assessment use category. |
Check whether it reflects actual use. |
Parcel Type |
Assessor’s classification of the parcel record. |
Useful when researching unusual parcel arrangements. |
Tax Rate Area |
Number identifying the tax-rate-area combination. |
Use it in the Auditor-Controller tax-rate lookup. |
Tax Status |
May show current or delinquent status in the Assessor display. |
Confirm actual payment balance with the Treasurer. |
Exemption |
Shows an enrolled exemption such as Homeowners’ where applicable. |
Contact the Assessor if a qualifying exemption is missing. |
Building SqFt |
Recorded building area used for assessment information. |
Check factual accuracy before a value dispute. |
Year Built |
Calendar year when at least half of original construction was complete. |
Do not confuse it with Effective Year Built. |
Effective Year |
Adjusted age reflecting substantial later construction or rehabilitation. |
Useful when comparing similar properties. |
Land / Improvements |
Separate components of assessed value. |
Compare current roll, roll preparation and base-value information carefully. |
Legal Description |
Assessment-oriented property description shown by the Assessor. |
Use the acquisition deed for the actual legal description needed for legal work. |
AIN vs PIN vs unsecured bill number
Identifier |
Format |
Used for |
Where to find it |
|---|---|---|---|
AIN |
10 digits, commonly 1234-567-890 |
Identifies a real-property parcel. |
Secured tax bill and Assessor records. |
PIN |
6-character alphanumeric code |
Security code used for certain electronic property-tax payments. |
Upper-left area of secured property-tax bill. |
Unsecured Bill Number |
8 digits beginning with 4 |
Identifies an unsecured tax bill. |
Unsecured bill under Property Description. |
What does the LA County Auditor-Controller do?
The Auditor-Controller receives assessed values from the Assessor and performs the tax-roll functions needed to turn those assessments into tax calculations. The Property Tax Services Division maintains secured, unsecured and supplemental rolls, processes roll changes and adds direct assessments.
Applies tax rates to assessed values and produces the extended property tax roll.
Places agency-submitted benefit assessments and special charges on secured tax bills.
Adjustments can generate corrected bills, cancellations or tax refunds.
Provides Tax Rate Area information and rate reports.
Auditor-Controller Property Tax Services contact
Phone service: 8:00 a.m.–4:30 p.m.
500 W. Temple Street, Room 153
Los Angeles, CA 90012
Counter hours: 8:00 a.m.–5:00 p.m.
Understand a direct assessment on your tax bill
Direct assessments are separate from ordinary ad valorem property taxes. They may pay for a property-specific service or benefit and appear as separate lines on the secured tax bill.
Examples published by LA County
If you do not recognize a charge
Decode the TRA and tax-rate calculation
Every taxable property belongs to a Tax Rate Area, or TRA, representing the combination of taxing entities applicable to that location. The TRA appears on the property record and tax bill.
Which LA County tax year should you be checking now?
Los Angeles County secured property tax follows a July 1–June 30 fiscal year. Annual bills are mailed in October and contain two payment installments.
10% penalty after Dec. 10 if unpaid.
10% penalty + $10 cost after Apr. 10.
Redemption charges now matter.
First installment due Nov. 1.
If 2025–26 taxes are still unpaid
After June 30, unpaid current-year secured taxes become defaulted on July 1. LA County publishes a $15 redemption fee plus an additional penalty equal to 1.5% of the base tax for each month the taxes remain in default.
Payment fee warning
The Treasurer publishes a 2.22% processor fee with a $1.49 minimum per transaction.
Use the AIN for parcel identification. Some electronic payment functions also require the separate six-character PIN printed on the bill.
Property tax refund routing depends on why the refund exists
Why money may be owed back |
Primary office |
What to know |
|---|---|---|
Assessor reduced the property’s assessed value |
Auditor-Controller |
Value-change refunds are processed after the Auditor receives the value reduction. |
Assessment Appeals Board reduced value |
Auditor-Controller / Assessor |
An appeal decision reducing value may generate a refund. |
Duplicate tax payment |
Treasurer & Tax Collector |
Non-value-related overpayments are handled by the Treasurer. |
Direct assessment was reduced after payment |
Levying agency |
Contact the agency responsible for the direct assessment. |
Use LA County Assessor maps without treating them as surveys
Assessor maps are designed for assessment administration. They can help identify parcels, recent parcel changes and sales context, but they are not legal boundary surveys.
Why the map and parcel detail may temporarily disagree
Data |
Published update pattern |
What it means for users |
|---|---|---|
Parcel display/base map |
Generally updated annually around roll release. |
A newly created parcel may not appear immediately. |
Parcel detail |
Normally updated weekly, with a seasonal suspension around roll processing. |
Detail and mapped parcel geometry can temporarily differ. |
Assessor maps |
Published as updated weekly. |
Useful for recorded-map reference but not survey precision. |
Recent sales layer |
Updated weekly with qualifying recent activity. |
Not every transfer or confidential sale detail will appear. |
For an exact boundary
Find a deed, mortgage, lien or other recorded document
The Los Angeles County Registrar-Recorder/County Clerk records and maintains real-estate documents. Its records include historical material dating to the nineteenth century, but the office does not provide a public internet search of its real-estate indexes.
Best record-copy workflow
In-person record organization
The viewing page says these records are available in the lower-level records area at Norwalk headquarters.
The viewing page directs researchers to the second-floor record area.
Norwalk, CA 90650
Homeowners’ Exemption, mailing address and Prop. 19
Homeowners’ Exemption
LA County describes the Homeowners’ Exemption as a $7,000 reduction in assessed value for a qualifying principal residence, producing roughly $70 in annual tax savings at the basic 1% levy.
Change the tax-mailing address
Prop. 19 questions
The Assessor—not the Auditor-Controller—handles reassessment exclusions and eligible base-year-value transfer questions involving parent-child/grandparent-grandchild transfers and qualifying homeowners age 55+, severely disabled homeowners or disaster victims.
Challenge a 2026 regular assessment before November 30
Do not confuse two review routes
Start with the Assessor when you believe factual property data is wrong or market value has declined below the factored base-year value.
Use the independent formal appeals process when you want an adjudicated assessment dispute.
Prepare the appeal
File online
Los Angeles County property contacts
Office |
Use it for |
Contact |
Main location |
|---|---|---|---|
Assessor |
AIN, values, parcel characteristics, exemptions, change of ownership and mailing address. |
500 W. Temple St., Room 225 Los Angeles, CA 90012 |
|
Auditor-Controller Property Tax Services |
Tax computation, TRA, direct assessments, value-change refunds and roll corrections. |
500 W. Temple St., Room 153 Los Angeles, CA 90012 |
|
Treasurer & Tax Collector |
Tax bills, current balance, payments, delinquencies and duplicate-payment refunds. |
225 N. Hill Street Los Angeles, CA 90012 |
|
Registrar-Recorder/County Clerk |
Deeds, mortgages, liens, easements and real-estate record copies. |
12400 Imperial Highway Norwalk, CA 90650 |
|
Assessment Appeals Board |
Formal assessment appeal applications and hearings. |
Kenneth Hahn Hall of Administration Los Angeles, CA |
Property research checklist
LA County Auditor-Controller property FAQs
Is there an LA County Auditor in Ohio?
No. Los Angeles County is in California. If you meant Los Angeles County, use the Los Angeles County Assessor for parcel and assessment records and the Auditor-Controller for property-tax calculations, tax-rate areas and direct assessments. If the property is actually in Ohio, identify the correct Ohio county and use that county auditor.
Where do I search Los Angeles County property records?
Use the official Los Angeles County Assessor Portal. It supports searches by Assessor Identification Number or address and provides parcel, assessment, building, land, tax-rate-area and map information.
What is an LA County AIN?
The Assessor Identification Number is the ten-digit real-property identifier used in Los Angeles County. It consists of a four-digit map book number, three-digit page number and three-digit parcel number, commonly displayed as 1234-567-890.
Is the LA County AIN the same as the tax-payment PIN?
No. The AIN is a ten-digit parcel identifier. The Treasurer’s PIN is a separate six-character security code printed on the secured property tax bill and used for certain electronic tax-payment functions.
Can I search LA County property online by owner name?
The Assessor does not provide an online owner-name search because of privacy restrictions. Search by AIN or address instead. Owner information may be available through Assessor offices or recorded-document research.
What does the Los Angeles County Auditor-Controller do with property taxes?
The Auditor-Controller extends the property tax roll, applies the general levy and voter-approved debt rates, processes tax-roll changes, places direct assessments on the secured roll, maintains tax-rate-area information and processes certain refunds caused by assessment reductions.
When are Los Angeles County secured property taxes due?
Annual secured bills are mailed in October. The first installment is due November 1 and becomes delinquent after December 10. The second installment is due February 1 and becomes delinquent after April 10.
How do I find a Los Angeles County deed online?
The Registrar-Recorder/County Clerk does not provide its real-estate indexes for direct online public searching. Use the official Real Estate Records Request service to order a copy or make an appointment to research records in person.
How do I appeal my 2026 Los Angeles County assessment?
The Los Angeles County Assessment Appeals Board states that the deadline for 2026 regular assessment filing is November 30, 2026 at midnight Pacific Time. A $46 nonrefundable filing fee generally applies, with a hardship fee-waiver process available.
Are Los Angeles County Assessor parcel maps legal surveys?
No. Assessor maps are prepared for assessment purposes and are not surveys. Use the recorded deed, subdivision or parcel map and a licensed land surveyor when exact property boundaries matter.

Khushboo Bobade is the editor and digital publisher of CountyAuditors.org. She oversees the research and editorial process for the website, ensuring that information about county auditor offices, property records, and government resources is accurate, verified, and easy for visitors to understand.
10 Ohio Property Tax Calculators & Auditor Tools
Built specifically for Ohio's 35% assessment ratio, current DTE forms, and 2026 Homestead, Owner-Occupancy, CAUV, Conveyance Fee, and Board of Revision rules. Every number reflects verified Ohio Department of Taxation amounts.
Annual Tax Bill Estimator
OHIOApplies Ohio's 35% assessment ratio plus your county's effective millage tier — the actual math your auditor uses.
Homestead Reduction Calculator
DTE 105A2026 Ohio Homestead: $29,000 general or $58,000 enhanced (100% disabled vet, KIA spouse). OAGI under $41,000 required for non-veteran applicants.
Owner-Occupancy & Non-Business Credits
DTE 105CEvery Ohio owner-occupied home qualifies for the 2.5% Owner-Occupancy Credit plus the automatic 10% Non-Business Credit. Most owners don't realize these stack.
Conveyance Fee Calculator
ORC 322When you sell or transfer Ohio property, the auditor collects $1 state + up to $3 county per $1,000, plus $0.50 per parcel. Counties choose their rate.
CAUV Agricultural Savings
DTE 109Ohio's Current Agricultural Use Value cuts taxable value dramatically for farmland (10+ acres, or smaller with $2,500+ annual gross income).
Mill Rate Converter
Ohio tax rates appear three ways on auditor sites: mills, percent, or dollars per $1,000. Convert between them instantly.
Parcel Number Cleaner
Ohio's 88 counties each format parcels differently — Franklin uses 010-123456-00, Cuyahoga uses 001-23-456, Hamilton uses 100-0001-0001-00. Auto-detects.
35% Ratio Sanity Check
Ohio law sets taxable value at 35% of market value. If yours is significantly higher, you're a strong BOR appeal candidate.
BOR Appeal Savings
DTE 1A successful Board of Revision complaint typically cuts your value 10–20%. Filing is free and stays in effect until the next reappraisal.
BOR Deadline Countdown
MAR 31Ohio's statutory Board of Revision filing deadline is March 31 for the prior tax year. Miss it and you wait until next year — no extensions.
Verify with the official Ohio source
These calculators use the verified 2026 Ohio Department of Taxation amounts and statutory rules. For your exact bill, exemption status, and county-specific deadlines, always confirm with your county auditor and the Ohio Revised Code:
Estimates use Ohio's 35% statutory assessment ratio and effective tax rate tiers averaged across major Ohio counties. Your actual bill depends on local school levies, voted millage, inside vs. outside millage splits, House Bill 920 reduction factors (HB 920), and special assessments. The 2026 Homestead general amount ($29,000) and enhanced amount ($58,000) reflect HB 187 inflation indexing — your county auditor's office may show slightly different transitional figures. Nothing here is legal or tax advice. CountyAuditors.org is an independent informational directory, not affiliated with any county government.