Property tax assessment in Los Angeles: what your bill actually means

Last updated 2026-07-09

How does Los Angeles County assess property taxes?

California's property tax system runs on Proposition 13, which voters passed in 1978. The law did two things that still shape every bill in LA County. It set the maximum base tax rate at 1% of assessed value, and it capped annual increases in that assessed value at 2% per year as long as ownership doesn't change. ^[1]

When you buy a property, the LA County Assessor resets its taxable value to the purchase price. That price becomes your "base year value." From there, the Assessor adds up to 2% each year for inflation, no matter what the actual market does. Pay $750,000 for a house in 2018, and your 2024 assessed value sits somewhere around $843,000 to $850,000, not whatever a Zillow estimate says.

The Assessor also reassesses when improvements finish or when ownership changes. A full kitchen remodel adds value. Repainting the living room does not. The office publishes a guide on what triggers reassessment, and "change in ownership" has specific legal definitions under Revenue and Taxation Code sections 60 through 69.5 that exclude some transfers between spouses, parents and children, and grandparents and grandchildren. ^[2]

The Assessor mails a Notice of Assessed Value each year, usually between July and the fall depending on your neighborhood roll. That notice is your starting point for everything, an appeal included.

How do you calculate property tax in Los Angeles?

The math is simple. The county multiplies your assessed value by the total tax rate, which has two parts: the state-capped 1% base rate and a set of "direct charges" that cover voter-approved bond measures, special assessments, and parcel taxes. ^[3]

Here is the formula:

Annual tax = (Assessed Value x 1%) + Direct Charges

Direct charges swing a lot by city and school district. A home in the Culver City Unified School District carries different bond measures than one in LAUSD territory. The LA County Auditor-Controller publishes the full rate book each year, broken down by "tax rate area" (TRA). You can find your TRA on your property tax bill or through the Assessor's online portal. ^[3]

A concrete example. A home assessed at $800,000 in a TRA where the total rate is 1.20% pays $9,600 a year before exemptions. The base 1% portion ($8,000) goes to the county general fund, schools, and other agencies. The remaining 0.20% ($1,600) covers bond and parcel obligations.

Qualify for the homeowner's exemption (more on that below) and you subtract $7,000 from the assessed value before applying the 1% rate. That saves $70 a year. Small, but free.

Component	Rate or Amount	Notes
Base tax rate	1.00%	Prop 13 cap, goes to county/schools
Voter-approved bonds	0.10% to 0.35% (varies)	Depends on your tax rate area
Parcel / special taxes	Fixed $ per parcel	Varies by city, fire district, etc.
Homeowner's exemption	minus $7,000 off assessed value	Must apply once; auto-renews
Disabled veteran exemption	minus $100,000 to $150,000 off AV	Income and disability thresholds apply

The Auditor-Controller posts the current year's rate book online. For 2024-25, most residential TRAs in unincorporated LA County land between 1.15% and 1.25% total. ^[3]

What exemptions can reduce your Los Angeles property tax bill?

Several exemptions are open to LA County homeowners, and most sit unused because people never ask.

Homeowner's Exemption. This exempts $7,000 of assessed value on your primary residence. The savings are modest ($70 a year at the 1% base rate), but you file once and it renews on its own. File with the Assessor by February 15 of the first year you want it. ^[4]

Disabled Veteran's Exemption. Veterans with a service-connected disability rating of 100%, or certain lower ratings under specific conditions, can exempt up to $150,000 of assessed value. Low-income qualifying veterans get the $150,000 exemption; others get $100,000. That's worth $1,000 to $1,500 a year at the 1% rate. The Assessor's office handles applications. ^[4]

Proposition 19 transfers. Passed in 2020 and effective February 16, 2021, Prop 19 lets homeowners 55 or older, severely disabled homeowners, or victims of a Governor-declared disaster move their existing base year value to a replacement home anywhere in California. ^[5] This replaced the older Prop 60/90 rules. The transfer isn't automatic. You file a claim with the Assessor within three years of the replacement purchase.

Parent-child and grandparent-grandchild transfers. Prop 19 also rewrote the rules for inherited property. Starting February 16, 2021, a child who inherits a parent's home keeps the parent's low assessed value only if the child moves in as a primary residence within one year. Investment properties or vacation homes inherited from parents now get fully reassessed at market value at death. Inherited before that date? Different rules apply.

Calamity reassessment. If a fire, flood, or other disaster damages your property, you can request a temporary reduction in assessed value while it's uninhabitable or reduced in value. The Assessor's disaster relief process covers how. Given recent fire seasons in the region, this matters more than ever. ^[6]

For how LA County structures the whole billing cycle, the county's own property tax overview walks through it. See also: [los angeles county property tax]

When does the LA County Assessor mail assessment notices, and what are the key deadlines?

Miss a deadline in the LA County property tax system and it costs you a full year. Know the calendar cold.

The fiscal year runs July 1 through June 30. The secured roll (for real property) closes in late July, and bills go out in October. You pay the first installment by December 10 and the second by April 10. Late payments carry a 10% penalty with no grace period and no exceptions for "I never got the bill." ^[3]

Deadline	What happens
February 15	Homeowner's exemption filing deadline (first-time applicants)
July 2	First day to file an assessment appeal for most properties
November 30	Last day to file an assessment appeal (annual roll)
December 10	First installment of secured property tax due
April 10	Second installment of secured property tax due
Within 60 days of Notice	Deadline to appeal a mid-year "escape" assessment

The appeal window for the annual roll opens July 2 and closes November 30 every year. ^[7] The 60-day window for escape or supplemental assessments is separate and runs from the date on your notice, not a fixed calendar date. Get a supplemental bill after a purchase or new construction, and you have 60 days from when the Assessor mails that notice to appeal it.

The Assessment Appeals Board (AAB) runs the hearings. After you file, expect to wait 12 to 24 months for a hearing date. The AAB has been clearing a backlog for years. Keep paying your taxes while the appeal is pending. A refund comes later if you win.

How do you appeal a property tax assessment in Los Angeles?

An LA County property tax appeal has four real steps, and none of them need a lawyer or a contingency firm.

Step 1: Pull the comparable sales. The assessed value has to reflect market value as of January 1 of the tax year (annual roll) or the change-in-ownership date (supplemental assessments). Your job is to show what similar properties actually sold for around that date. The Assessor's portal lets you look up recent sales. The county recorder's office and the California Department of Tax and Fee Administration's assessment resources can round out your research. ^[8]

Step 2: File the application. Download the Assessment Appeal Application (form BOE-305-AH) from the Assessment Appeals Board. You file with the AAB, not the Assessor. The filing fee in LA County is $30 for residential properties assessed under $1 million. ^[7] The form asks for your current assessed value, what you think the correct value is, and the basis for your opinion.

Step 3: Prepare your evidence packet. The AAB wants comparable sales ("comps") from the six months before and after the valuation date. Three to five clean comps showing lower values than your assessment usually do the job. If your property has physical defects the Assessor didn't account for, get repair estimates. Appraisals help but aren't required.

Step 4: Attend the hearing. Hearings run 30 to 90 minutes. You present your comps, the Assessor's representative responds, the board decides. You can bring a licensed appraiser or attorney, but plenty of homeowners win representing themselves on straightforward residential appeals.

Contingency firms usually charge 25% to 40% of one year's tax savings. On a $10,000 bill where you win a 15% reduction, that's $375 to $600 walking out the door instead of staying in your pocket. If you're comfortable with a spreadsheet and a county portal, DIY is the smart call. The TaxFightBack appeal kit walks through the evidence-gathering step by step for homeowners who want to handle it themselves.

For how other big counties handle appeals, the processes in San Diego and Maricopa County share similar timelines but different evidence standards.

What is the decline-in-value (Prop 8) reassessment and how do you request one?

This is one of the most underused tools in California property tax law. Proposition 8, passed in 1978 as an amendment to Prop 13, requires the Assessor to use the lower of your Prop 13 base year value (plus annual increases) or the current market value as your assessed value for a given year, whichever is less. ^[9]

It matters when the market drops. After 2008, hundreds of thousands of California homeowners got reassessments under Prop 8 as market values fell below their Prop 13 base values. If your neighborhood has softened since you bought, or you bought near a peak and values have corrected, you might qualify for a temporary reduction.

Request a Prop 8 review by filing the same BOE-305-AH appeal form with the AAB before November 30. The Assessor does review properties for Prop 8 eligibility each year, but don't count on the office to catch yours. Submit comparable sales from January 1 of the tax year showing market value below your current assessed value.

One catch. When the market recovers, the Assessor can raise your assessed value back toward your Prop 13 base year value (plus accumulated 2% increases), sometimes in bigger jumps than the normal annual cap. The California State Board of Equalization's property tax guidance explains the mechanics. ^[8]

How are new construction and supplemental assessments handled in LA County?

Any new construction finished after your base year triggers a supplemental assessment on the added value alone. Buy a house for $600,000, then add an ADU a contractor values at $200,000, and the Assessor mails a supplemental bill for the $200,000 increment.

The Assessor also mails supplemental assessments when you buy. Close escrow mid-year on a home where the prior owner's assessed value was $400,000 but you paid $900,000, and you'll get a supplemental bill for the difference, covering the part of the year after your close date.

You have 60 days from the mailing date of a supplemental assessment notice to appeal it. Miss that window and you wait for the next annual roll cycle. The supplemental bill arrives separately from your regular secured tax bill, and many new owners miss it because they're not watching for it.

The Assessor's website has a supplemental tax estimator that takes a purchase price and estimates your first-year supplemental obligation before the bill lands. Use it so you're not blindsided. ^[6]

What does the LA County Assessor's office actually do, and who should you contact?

The LA County Assessor is a separate elected official from the Treasurer-Tax Collector, who handles billing and collections. This trips people up constantly. Want to dispute your value? You deal with the Assessor's office. Want to pay your bill, set up a payment plan, or ask about a penalty waiver? You deal with the Treasurer-Tax Collector.

The Assessor's main office is in downtown Los Angeles, with district offices in the Antelope Valley, East Los Angeles, Van Nuys, and other spots. For most homeowners, the Assessor's online portal handles routine questions. You can look up your property's current assessed value, recent sales in your area, and the status of any pending exemptions. ^[6]

LA County has over 2.5 million assessable parcels, the largest assessment roll in the United States by value. The total net value on the 2023-24 roll topped $1.997 trillion. ^[6] That scale means individual follow-up runs slow, especially around the fall filing season.

The Assessment Appeals Board is a separate body, not part of the Assessor's office. The AAB clerk's office handles your appeal filing and scheduling. Contact details for both offices sit on the county's official portal.

How does LA County property tax compare to other California counties and nearby states?

Prop 13 makes direct comparisons tricky, because two neighbors can carry wildly different bills based only on when they bought. The long-term owner who bought in 1995 might pay $3,000 a year on the same street where a 2022 buyer pays $14,000.

Across California counties, the base 1% rate is identical by law. The variation comes from bond and parcel taxes. San Francisco and some Bay Area counties carry higher bond loads, often pushing total effective rates above 1.3%. LA County generally runs 1.15% to 1.25% for most residential areas. ^[3]

Against other large states, California's effective rate looks low. The Lincoln Institute of Land Policy's 50-state comparison (2023 data) puts California's owner-occupied effective rate at roughly 0.68% to 0.75% of market value (not assessed value), because Prop 13 holds assessed values far below market for long-term owners. Texas runs 1.6% to 1.9% of market value. Illinois runs around 1.8%. New Jersey clears 2%. ^[10]

For recent California buyers, the effective rate at purchase is closer to 1.15% to 1.25% of what they actually paid, which competes with many Sunbelt markets. Arizona's Maricopa County, by comparison, runs around 0.6% to 0.7% of full cash value under a different assessment-ratio system. See also: [maricopa property tax]

What happens after you win (or lose) an assessment appeal in LA County?

If the Assessment Appeals Board rules for you, the Assessor adjusts the assessment and the Auditor-Controller calculates a refund for any overpaid taxes, plus interest at 2% per year from the date of payment. ^[7] Refunds can take several months to process after a favorable decision.

Lose, and your options are thin but not zero. You can refile in the next appeal window (July 2 to November 30) if market conditions or your evidence have changed. You can also challenge the AAB decision in superior court, though that's expensive and rarely worth it for a residential property.

One thing that surprises people: settlements are common. The Assessor's office can offer a stipulated value before your hearing date. If both sides agree on a number, you sign a stipulation and skip the hearing. Plenty of appeals settle for a partial reduction that still means real money. A 10% cut on a $900,000 assessed value saves $900 a year at the 1% base rate, and it compounds, because that lower base carries forward under Prop 13.

Managing a portfolio of properties or a commercial asset? Post-appeal tracking matters even more. There's a broader breakdown of how appeals resolve for commercial owners in the commercial-property hub resources on the site.

For DIY, the TaxFightBack appeal kit includes the stipulation language and a post-decision checklist so you know what to ask for if the Assessor's representative reaches out before your hearing date.

What are the most common mistakes LA homeowners make with property taxes?

Missing the November 30 appeal deadline is the most expensive mistake. No extension. No exception for late-discovered evidence. Mark it now.

Second most common: confusing the Assessor's estimated market value with the Prop 13 assessed value. Your Zestimate and your tax bill measure different things. The taxable assessed value is what the law says it must be, not what the market thinks the house is worth today.

Third: skipping exemptions that apply. The homeowner's exemption is small but automatic once filed. The disabled veteran's exemption is substantial and badly underused. Prop 19 transfers are time-limited and need active filing. The county won't do it for you.

Fourth: assuming that buying below asking means a low assessment. The Assessor uses the full purchase price shown on the deed transfer documents, not the list price. Pay $850,000 after the seller credits you $30,000 for repairs, and the recorded sale price is still likely $850,000. That's the number the Assessor uses.

Fifth: never checking the property characteristics the Assessor has on file. The records might list four bedrooms when you have three, or a larger square footage than the actual structure. Errors on the property data card are appealable and sometimes easier to win than a market-value argument.

Frequently asked questions

What is the property tax rate in Los Angeles County?

The base rate is 1% of assessed value under Proposition 13. On top of that, voter-approved bonds and parcel taxes add roughly 0.10% to 0.35% depending on your specific tax rate area (TRA). Most LA County residential properties see total effective rates between 1.15% and 1.25%. Find your exact TRA rate in the Auditor-Controller's annual rate book.

How does Proposition 13 affect my LA County property taxes?

Prop 13 caps the base property tax rate at 1% of assessed value and limits annual increases in assessed value to a maximum of 2%, regardless of market appreciation. Your assessed value resets to the purchase price when you buy. Long-term owners often pay far less than recent buyers on comparable homes simply because of when they purchased.

When is the deadline to appeal a property tax assessment in Los Angeles?

For the annual secured roll, the appeal window runs July 2 through November 30 each year. For supplemental or escape assessments triggered by a purchase or new construction, you have 60 days from the mailing date of your notice. Missing either deadline means waiting until the next cycle, with no exceptions.

How do I file a property tax appeal in Los Angeles County?

Download form BOE-305-AH from the LA County Assessment Appeals Board, fill it out with your current assessed value and your opinion of the correct value, and file it with the AAB (not the Assessor's office) before November 30. The filing fee is $30 for residential properties assessed under $1 million. Gather comparable sales from around the January 1 valuation date to support your claim.

What is a supplemental assessment in LA County?

A supplemental assessment gets issued when a change in ownership or new construction happens mid-year. It covers the difference between the prior assessed value and the new one, prorated for the rest of the fiscal year. You have 60 days from the mailing of the supplemental notice to appeal. New buyers often miss these bills because they arrive separately from the regular secured tax bill.

Can I lower my property taxes if my home's value dropped?

Yes. Under Proposition 8 (1978), the Assessor must use the lower of your Prop 13 base year value or current market value. If the market has fallen below your Prop 13 assessed value, you can request a temporary reduction by filing a standard assessment appeal before November 30, with comparable sales showing lower current market values.

What exemptions are available to LA County homeowners?

The homeowner's exemption reduces assessed value by $7,000 (saving roughly $70 a year). Disabled veterans can exempt $100,000 to $150,000 of assessed value, worth $1,000 to $1,500 annually. Prop 19 lets homeowners 55 or older transfer their base year value to a replacement home anywhere in California. Disaster victims can request temporary reassessment reductions.

How long does an LA County property tax appeal take?

After filing, expect 12 to 24 months before a hearing date in most cases, though the AAB's backlog varies by year. You must keep paying taxes during this period. Win, and you get a refund with 2% annual interest on the overpayment. Some cases settle before the hearing when the Assessor's office offers a stipulated lower value.

What is a tax rate area (TRA) and how does it affect my bill?

A tax rate area is a geographic zone that shares the same set of voter-approved bonds and parcel taxes. Your TRA is printed on your property tax bill. Two properties a mile apart can sit in different TRAs with meaningfully different total rates. The LA County Auditor-Controller publishes the complete TRA rate book annually so you can verify your bill.

Do I need a lawyer or appraiser to appeal my Los Angeles property tax?

No. The Assessment Appeals Board accepts self-represented homeowners. Many residential appeals succeed on publicly available comparable sales data and the standard BOE-305-AH form. Licensed appraisers strengthen your case but usually cost $400 to $800. Lawyers and contingency firms generally charge 25% to 40% of one year's savings, which eats most of the benefit on a typical residential appeal.

What happens if I miss the LA County property tax payment deadline?

A 10% penalty applies immediately after December 10 (first installment) or April 10 (second installment). There is no grace period. If the second installment goes unpaid past June 30, the property becomes tax-defaulted and additional fees accrue. The Treasurer-Tax Collector handles penalty waiver requests, granted only in documented cases of genuine hardship or official error.

How does Proposition 19 change property tax on inherited homes in LA County?

Since February 16, 2021, inherited homes get fully reassessed at market value at death unless the inheriting child moves in as a primary residence within one year. Investment properties and vacation homes no longer carry over a parent's low base year value. Properties inherited before February 16, 2021, were governed by the prior Prop 58/193 exclusion rules.

Where can I look up my Los Angeles County assessed value?

The LA County Assessor's online portal (assessor.lacounty.gov) lets you search by address or parcel number to see your current assessed value, property characteristics on file, and recent comparable sales. You can also request a copy of your property record card from the Assessor's office to verify that square footage, bedroom count, and lot size are recorded correctly.

Can a new construction ADU raise my property taxes in Los Angeles?

Yes, but only the added value gets reassessed. Build an ADU, and the Assessor issues a supplemental assessment on the ADU's value alone. Your existing home's base year value stays intact under Prop 13. The ADU's assessed value is then added to your base, and that combined number grows at up to 2% a year going forward.

Sources

1. California State Board of Equalization, Property Taxes Overview (Proposition 13): Proposition 13 caps the base property tax rate at 1% of assessed value and limits annual assessment increases to 2%
2. California Revenue and Taxation Code, Sections 60-69.5, via California Legislative Information: Change in ownership definitions and exclusions including spouse-to-spouse and parent-child transfers
3. LA County Auditor-Controller, Property Tax Rate Books: Total tax rate varies by tax rate area; most LA County residential TRAs fall between 1.15% and 1.25%; first installment due December 10, second due April 10
4. LA County Assessor, Exemptions: Homeowner's exemption reduces assessed value by $7,000; disabled veteran's exemption ranges from $100,000 to $150,000; homeowner's exemption deadline is February 15
5. California State Board of Equalization, Property Taxes (Proposition 19): Prop 19 effective February 16, 2021, allows homeowners 55+ and severely disabled homeowners to transfer base year value to a replacement home anywhere in California
6. LA County Assessor, Annual Report and Online Services: LA County's 2023-24 net assessment roll exceeded $1.997 trillion, making it the largest in the United States; supplemental tax estimator and disaster relief processes described
7. LA County Assessment Appeals Board (Board of Supervisors Executive Office): Appeal window for annual roll runs July 2 through November 30; filing fee is $30 for residential properties assessed under $1 million; refunds include 2% annual interest
8. California State Board of Equalization, Property Tax Rules and Assessment Practices: Comparable sales methodology for appeals; Prop 8 mechanics including recovery of assessed value when market rebounds
9. California State Board of Equalization, Property Taxes (Proposition 8 Decline in Value): Proposition 8 requires the Assessor to use the lower of Prop 13 base year value or current market value for annual assessment
10. Lincoln Institute of Land Policy, 50-State Property Tax Comparison Study 2023: California's effective owner-occupied property tax rate is approximately 0.68% to 0.75% of market value; Texas runs 1.6% to 1.9%; Illinois runs approximately 1.8%; New Jersey exceeds 2%