La Mirada Property Tax Rate: Exemptions, Deadlines, and How to Pay

La Mirada property tax starts with California’s constitutional 1% base rate on your home’s assessed value, then climbs from there with voter-approved bond levies and direct assessments. Most La Mirada homeowners see a total ad valorem rate somewhere between 1.1% and 1.25%, plus flat-dollar charges for services like landscape maintenance, libraries, and vector control. Your final bill depends on where your parcel sits, what its assessed value is under Proposition 13, and which exemptions you claim.

What Makes Up the Rate

The California Constitution caps the general property tax levy at 1% of a property’s full cash value.¹ That 1% is the floor. On top of it, local agencies whose voters have authorized bond debt collect additional ad valorem taxes to repay those bonds. In La Mirada, those levies typically come from the ABC Unified School District or the Norwalk-La Mirada Unified School District, along with regional agencies like the Metropolitan Water District. The exact rate layered onto your parcel depends on your tax rate area, a geographic code assigned by which taxing districts overlap your property.

Los Angeles County voters also approved Measure B in 2002, which funds the countywide trauma centers, emergency medical services, and bioterrorism preparedness system through a special property tax assessment that appears on every secured tax bill in the county.² To see your exact combined rate, look up your parcel’s tax rate area through the Los Angeles County Auditor-Controller.

Beyond percentage-based taxes, your bill carries direct assessments: flat-dollar charges for specific services that aren’t tied to home value. Common line items for La Mirada properties include landscape and lighting maintenance district fees for parks and streetlights, library services, and regional vector control. Each one shows up as its own line so you can see where the money goes.

Some La Mirada parcels also carry Mello-Roos special taxes if they sit within a Community Facilities District. Much of La Mirada was built before the Mello-Roos Act took effect in 1982, so these charges are less common here than in newer California subdivisions, but they do appear on specific parcels. A Mello-Roos line item is a fixed annual amount set when the district was formed, and it isn’t reduced by Proposition 13 protections or by filing standard exemptions.

How Assessed Value Works Under Proposition 13

The tax rate is only half the math. The other half is your assessed value, which in California is almost always lower than what your house would sell for today. Under Proposition 13, the county assessor sets a base year value when you buy the property or complete new construction.³ After that, the assessed value can rise no more than 2% per year for inflation, regardless of how fast the local market moves.⁴

That is why two similar houses on the same La Mirada block can have wildly different tax bills. A homeowner who bought in 1990 might have an assessed value under $200,000. A neighbor who bought recently could sit at $800,000 or more. Same rate; different assessed value. The 2% annual cap resets only when the property changes hands or triggers a reassessment event.

What Triggers a Reassessment

Two things cause the assessor to recalculate your base year value: a change in ownership and new construction. Most sales are obvious changes in ownership, but certain transfers between business entities count too, and even adding or removing someone from a deed can qualify in some cases.

New construction is defined more broadly than most people expect. Under Revenue and Taxation Code Section 70, it covers any addition (a new room, garage, second story, or accessory dwelling unit), any alteration converting the property to a different use, and any rehabilitation substantial enough to create the equivalent of a new improvement.⁵ Only the new portion gets reassessed, not the whole home. Routine maintenance like a new roof or fresh paint does not count.

If disaster damages your home and you rebuild something substantially equivalent to what existed before, that reconstruction is also excluded from reassessment.⁵ The rebuild triggers reassessment only if the new structure exceeds the original in size or function.

Supplemental Bills After You Buy

New La Mirada homeowners are often caught off guard by supplemental tax bills that arrive months after closing. When property changes hands, the assessor reappraises it at the purchase price and issues one or two supplemental assessments covering the difference between the old owner’s assessed value and the new one, prorated for the remaining portion of the fiscal year.⁶ If your purchase price is higher than the prior assessed value, you owe additional tax. If it’s lower, you get a refund.

Supplemental bills are separate from your annual secured bill, and your mortgage escrow account almost never covers them. The bill goes straight to you, with a payment deadline printed on the bill rather than following the standard November and February schedule.⁷ If you closed between July and May, you could receive two supplemental bills covering the current and next fiscal years. Budget for them. Missing the deadline carries the same penalties as missing your regular payment.

Exemptions That Lower Your Bill

Homeowners’ Exemption

If you own and occupy your La Mirada home as your principal residence, you qualify for a $7,000 reduction in assessed value.⁸ At the 1% base rate, that saves roughly $70 a year. Modest, but free money you lose by not filing. New owners automatically receive the claim form from the assessor. If you never submitted it, you can apply online or by mail at any time, and the exemption applies as long as you occupy the home on January 1 of the tax year.

Disabled Veterans’ Exemption

Veterans who are blind in both eyes, have lost the use of two or more limbs, or are totally disabled from a service-connected condition can exempt a much larger portion of their home’s value.⁹ For the 2026 lien date, the basic exemption is $180,671, and veterans with household income at or below $81,131 qualify for a low-income exemption of $271,009.¹⁰ The basic exemption requires only a one-time filing. The low-income version must be renewed each year by February 15.

Parent-to-Child Transfers Under Proposition 19

If you inherit a home from a parent, you may keep their low assessed value instead of having it reassessed at current market value. Under Proposition 19, the exclusion applies when the home was the parent’s principal residence and you move in as your own principal residence within one year of the transfer.¹¹ You also need to file for the homeowners’ or disabled veterans’ exemption within that same one-year window.

There is a value cap. If the home’s current market value exceeds the parent’s factored base year value by more than $1 million, the excess gets added to your taxable value.¹¹ Say the parent’s assessed value was $150,000 and market value at transfer is $900,000. The full exclusion applies because the gap is under $1 million. If market value were $1.3 million instead, you would owe tax on the $150,000 that exceeds the threshold. The same rules apply to family farm transfers and, in limited cases, grandparent-to-grandchild transfers when the parents are deceased.

Challenging Your Assessed Value

If your home’s market value has dropped below the assessor’s current valuation, you can request a decline-in-value review. The Los Angeles County Assessor accepts applications each year from July 2 through November 30.¹² If the assessor agrees, your assessed value drops for that year. It is temporary relief. Once the market recovers, the assessor restores the value up to your Proposition 13 factored base year value.

If you disagree with the assessor’s findings, you can file a formal appeal with the Los Angeles County Assessment Appeals Board during the same July 2 through November 30 filing window.¹² The filing fee is $46 and non-refundable, though homeowners facing financial hardship can request a waiver.¹³ Bring comparable sales data and evidence of any property defects.

Payment Deadlines and Penalties

Los Angeles County splits your annual property tax into two installments. The first is due November 1 and becomes delinquent after December 10. The second is due February 1 and becomes delinquent after April 10.¹⁴ When a deadline falls on a weekend or holiday, the due date rolls to the next business day.

Miss the first installment and you owe a 10% penalty on that installment. Miss the second and you owe 10% plus a $10 administrative cost.¹⁵ The penalties are automatic; the county does not grant extensions for individual circumstances. Payment must be received by 5:00 p.m. on the deadline date, or postmarked by that date if mailing.

What Happens If You Don’t Pay

If both installments remain unpaid by June 30, the property becomes tax-defaulted. At that point the county adds a $15 redemption fee and begins charging 1.5% per month on the total unpaid balance.¹⁶ That works out to 18% a year in penalty interest, and it compounds on top of each additional year of delinquent taxes if you keep not paying.

Residential properties that stay tax-defaulted for more than five years become eligible for sale at public auction. For non-residential commercial properties, the waiting period is three years.¹⁷ To stop a pending auction, you have to pay the full amount of defaulted taxes, penalties, and fees by the last business day before the sale. Properties in default beyond those periods no longer qualify for installment plans, so redemption means paying the entire balance at once.

How to Pay

The Los Angeles County Treasurer and Tax Collector accepts several payment methods. You will need your Assessor’s Identification Number (AIN), a ten-digit number printed on your tax bill, so the payment posts to the correct parcel.

eCheck online through the county’s property tax portal, free of processing fees.¹⁸
Credit or debit card, which carries a 2.22% service fee with a $1.49 minimum per transaction, whether online, by phone, or in person.¹⁸
Mail a check or money order with the payment voucher from your bill. The payment must be postmarked by the delinquency date to avoid penalties.
In person at the Treasurer and Tax Collector’s office in downtown Los Angeles during business hours.

The county also offers an automatic monthly payment plan for homeowners who prefer to spread the cost across the year instead of making two lump-sum payments. ACH transfers through the monthly plan start at no fee, and credit card payments through the plan carry a 1.99% fee.¹⁸

Postponement for Seniors and Disabled Homeowners

California’s Property Tax Postponement Program lets qualifying homeowners defer their property tax payments until they sell the home, move out, or pass away. To qualify, you must be a senior, blind, or disabled, use the home as your principal residence, have annual household income of $55,181 or less, and hold at least 40% equity in the property. The state places a lien on the property for the postponed amount and charges interest. For homeowners on fixed incomes, the program can be the difference between staying in the home and losing it to delinquency. The 2025–26 filing period closes February 10, 2026.¹⁹

1
Justia. California Constitution Article XIII A – Tax Limitation
2
Los Angeles County Department of Health Services. Authorization – Trauma, Emergency and Bioterrorism Response Assessment
3
Los Angeles County Assessor. Proposition 13
4
California Legislative Information. California Revenue and Taxation Code 51
5
California Legislative Information. California Revenue and Taxation Code 70
6
Los Angeles County Treasurer and Tax Collector. New Property Owner
7
Los Angeles County Property Tax Portal. Supplemental Secured Property Tax Bill
8
Los Angeles County Assessor. Homeowners’ Exemption
9
California Legislative Information. California Revenue and Taxation Code 205-5
10
Sacramento County Assessor. The Disabled Veterans’ Exemption: What Is It? How and When to Apply for It
11
California Legislative Information. California Revenue and Taxation Code 63.2
12
Los Angeles County Assessor. Decline in Value
13
Los Angeles County Board of Supervisors. Assessment Appeals
14
Los Angeles County Treasurer and Tax Collector. Secured Property Taxes General Information
15
Los Angeles County Property Tax Portal. Frequently Asked Questions
16
Los Angeles County Property Tax Portal. Statement of Prior Year Taxes
17
Los Angeles County Treasurer and Tax Collector. Auction General Information
18
Los Angeles County Treasurer and Tax Collector. Payment Options
19
California State Controller. Property Tax Postponement