Antioch Property Tax: 2026 Rate, Calculator & Exemptions

Antioch Property Tax 2026 brings a rate of 1.208 % that owners can verify with the Antioch property tax calculator 2026, which pulls data from the Contra Costa County Assessor’s Office. The assessment schedule releases each March, letting residents see when exemptions for seniors or relief programs apply. Payments flow through the Antioch property tax payment portal, where online options include credit card, ACH, and the county’s e‑pay link. Missed deadlines trigger the Antioch property tax delinquency process, leading to liens that require timely removal to avoid extra penalties.

Antioch Property Tax bills list due dates, fire district fees, and the portion allocated to the Antioch school district, helping homeowners track revenue sources and seasonal adjustments. The Antioch property tax map viewer breaks down neighborhoods, while historical trends show the 2023 increase of 0.04 % and upcoming abatement criteria. Appeals follow clear Antioch property tax appeal guidelines filed with the assessor office, reachable by phone at (925) 313‑7400 or email robin.cantu@assr.cccounty.us. Eligible owners can check refund eligibility or request lien removal through the county’s online portal.

Search Antioch City Property Tax

Property owners in Antioch can locate current tax information through the Contra Costa County Assessor’s public search portal. The portal displays assessed values, exemption status, payment history, and parcel details for every property within city limits. Searching takes only a few minutes when the parcel number, property address, or owner name is ready.

Step-by-Step Search Process

1. Open the Contra Costa County Assessor search portal in a web browser.
2. Select the “Property Search” option from the main menu.
3. Enter the Assessor’s Parcel Number (APN), street address, or owner name in the search field.
4. Review the matching parcel results and click the correct property.
5. Review the parcel record page for assessed value, tax bill, exemption status, and payment history.
6. Print or download the record for personal records or appeal preparation.

Property records update regularly after the annual assessment roll is finalized each spring. Users searching during peak periods may see a brief loading delay. Anyone unable to locate a parcel can contact the Assessor’s Office for direct assistance using the verified contact information at the end of this page.

What Search Results Display

• Current assessed value and prior year value for comparison
• Applied exemptions such as homeowner, senior, or disabled veteran
• Tax bill amounts with installment due dates
• Payment history showing paid, pending, and delinquent status
• Parcel map with lot dimensions and structure details

Property Tax Rate and Effective Rate

Antioch Property Tax operates at a combined rate of 1.208 percent for the 2026 tax year, applying to the assessed value of each parcel. The rate combines voter-approved measures from Contra Costa County, the City of Antioch, local school districts, and special districts. Property owners can verify the exact rate through the Contra Costa County Assessor’s public search portal at https://www.contracosta.ca.gov/191/Assessor.

Rate Components

Rates adjust each year based on voter-approved bonds, parcel taxes, and assessment roll changes. The combined rate applies to every taxable dollar of assessed value within Antioch city boundaries.

Assessment Schedule and Annual Calendar

The Contra Costa County Assessor releases the annual assessment roll each March, establishing property values for the upcoming fiscal year. Assessment notices mail to property owners by the end of June, giving owners 60 days to review values before the tax bill prints in October. Bills follow the standard California fiscal year running from July 1 through June 30.

Key Annual Dates

• January 1: Lien date for property tax assessment
• March 1: Assessment roll finalized and submitted to the Auditor
• Late June: Assessment notices mailed to property owners
• August 31: Deadline to file assessment appeal with the Assessment Appeals Board
• October 1: Secured tax bills mailed to property owners
• December 10: First installment due date
• April 10: Second installment due date

Senior Exemptions and Relief Programs

Antioch Property Tax offers several relief options for qualifying seniors, disabled homeowners, and low-income residents. The California Homeowner Exemption reduces the assessed value by 7,000 dollars for owner-occupied primary residences. Additional programs include the Senior Citizens Property Tax Postponement and the Disabled Veterans Exemption.

Eligibility Categories

• Homeowner Exemption: Owner-occupied primary residence, filed once with the Assessor
• Senior Exemption: Homeowners age 65 or older with annual income below county limits
• Disabled Veterans Exemption: Veterans with service-connected disabilities rated 100 percent
• Property Tax Postponement: Seniors or disabled owners who meet income and equity thresholds

Filing Steps for Senior Exemption

1. Obtain the BOE-266 form from the Assessor’s Office or download it from the county website.
2. Complete the form with property details, income information, and ownership status.
3. Attach supporting documents such as income statements and age verification.
4. Submit the form in person or by mail to the Assessor’s Office before the deadline.

Payment Portal and Online Options

Antioch Property Tax payments can be submitted through the Contra Costa County Tax Collector’s online portal, by mail, or in person at the County Finance Building. The online portal accepts credit cards, debit cards, and electronic checks (ACH transfers). A small convenience fee applies to card payments but not to e-check transactions.

Accepted Payment Methods

• Online: Credit card, debit card, or e-check through the county payment portal
• Mail: Check or money order with the payment stub from the tax bill
• In Person: Cash, check, or card at the County Finance Building cashier window
• Phone: Credit card payment through the automated phone system

Payment Schedule for Secured Property

Bill Due Dates and Delinquency Process

Antioch Property Tax bills become delinquent if payment does not post by 5:00 PM Pacific Time on the due date. A 10 percent penalty attaches to the first installment after December 10, and the second installment carries a 10 percent penalty plus a 20-dollar collection cost after April 10. Continued non-payment triggers the tax default process and eventual lien sale eligibility.

Delinquency Timeline

• December 11: First installment penalty of 10 percent applied
• April 11: Second installment penalty of 10 percent plus 20-dollar cost applied
• June 30: Fiscal year closes; unpaid taxes become defaulted
• Following Year: Defaulted parcels become eligible for tax sale auction

Appeal Guidelines and Filing Process

Property owners who disagree with the assessed value shown on the annual notice may file an appeal with the Contra Costa County Assessment Appeals Board. Appeals must be filed between July 2 and August 31 of each year for the current assessment roll. The filing fee ranges from 60 to 300 dollars depending on the parcel value and type of appeal.

Required Documents for Filing

• Completed Assessment Appeal application form (BOE-305-AH)
• Copy of the Assessor’s parcel information notice
• Supporting evidence such as comparable sales, photos, or repair estimates
• Property inspection reports or appraisal reports when available

Filing Steps

1. Download the BOE-305-AH form from the Clerk of the Board website.
2. Complete all sections, including the reason for the appeal and the requested value.
3. Include the filing fee in the form of a check or money order.
4. Submit the application in person or by mail before the August 31 deadline.
5. Receive a hearing notice with the date, time, and location of the appeals hearing.

Refund Eligibility and Claim Process

Antioch Property Tax refunds apply when a property owner has overpaid, paid the same bill twice, or received a successful assessment appeal that lowered the value. Refund claims must be filed within four years of the payment date or within one year of the decision granting the refund, whichever is later. The County Auditor processes approved refunds, which may be issued as a check or applied as a credit to the next tax bill.

Common Refund Scenarios

• Successful assessment appeal resulting in a reduced value
• Duplicate payment of the same tax installment
• Payment made on a property sold before the lien date
• Exemption granted retroactively after bills were paid at full value

Lien Removal Procedure

Antioch Property Tax liens attach to a parcel when taxes remain unpaid and enter default status. Removing a lien requires paying all delinquent taxes, accumulated penalties, interest, and any associated administrative costs. Property owners can verify lien status through the Contra Costa County Recorder’s Office using the Clerk-Recorder search portal at https://www.contracosta.ca.gov/160/Clerk-Recorder.

Steps for Lien Clearance

1. Confirm the total amount owed through the Tax Collector’s office.
2. Pay the full delinquent amount plus penalties, interest, and fees.
3. Request a lien release or satisfaction of lien document.
4. Record the release document with the County Recorder to clear the public record.

Neighborhood Breakdown and Map Viewer

The Contra Costa County GIS map viewer displays parcel boundaries, zoning, school district lines, and tax rate areas across Antioch. Residents can review neighborhood-level tax allocation by selecting a parcel and viewing the combined tax rate area details. The map tool also shows flood zones, topography, and special district boundaries that affect property tax bills.

Available Map Layers

• Parcel boundaries with APN labels
• School district attendance zones
• Fire protection district boundaries
• Floodplain and FEMA hazard overlays
• Zoning and land use classifications

Revenue Sources and School District Allocation

Antioch Property Tax revenue funds multiple local services, with the largest share directed to the Antioch Unified School District. Schools receive roughly 41 cents of every dollar paid, supporting teacher salaries, facility maintenance, and educational programs. The remaining allocation covers county services, city operations, fire protection, and special district programs.

Allocation Breakdown

Fire District Fees and Special Assessments

Antioch Property Tax bills include special assessments for fire protection, lighting, landscaping, and infrastructure maintenance. The East Contra Costa Fire Protection District receives a parcel tax that funds firefighter staffing, equipment purchases, and emergency response services. Community Facilities Districts (CFDs) within Antioch may also levy additional charges for specific neighborhood improvements.

Special District Categories

• Fire Protection: Supports local fire stations and emergency medical response
• Street Lighting: Funds operation and maintenance of streetlights in residential areas
• Landscape Maintenance: Covers parks, medians, and public green spaces
• Community Facilities: Supports new development infrastructure such as roads and sewers

Abatement Criteria and Historical Trends

Antioch Property Tax abatement applies when property damage from a natural disaster, fire, or vandalism reduces the value of a structure by more than 10,000 dollars. Owners must file a calamity loss claim with the Assessor within 12 months of the damage event. Historical data shows a 0.04 percent increase in the effective rate from the previous tax year, driven by voter-approved school bonds and fire district measures.

Abatement Eligibility

• Damage from fire, flood, earthquake, or other natural disaster
• Vandalism or accident damage exceeding 10,000 dollars in loss
• Demolition of a damaged structure with intent to rebuild
• Buildings condemned by local authorities as unsafe

Rate History

Seasonal Adjustments and Mailing Cycles

Antioch Property Tax bills follow a predictable seasonal cycle tied to the California fiscal calendar. The first installment mail reaches owners in early October, with the second installment following in February. Property owners planning to escrow taxes through a mortgage lender should expect the lender to receive the bill directly and pay on the homeowner’s behalf before each due date.

Seasonal Cycle

• October: First installment tax bills mail to property owners
• December 10: First installment payment deadline
• February: Second installment tax bills mail to property owners
• April 10: Second installment payment deadline
• June 30: Fiscal year closes and unpaid taxes become defaulted

Contact, Local Details, and Map

Property owners needing direct assistance with Antioch Property Tax questions can reach the Contra Costa County Assessor’s Office and the Clerk-Recorder’s Office using the verified contact details below. Both offices are open to the public during standard business hours at the listed Martinez locations.

Tax Assessor Contact Details

Deed Recorder Contact Details

Frequently Asked Questions

The Antioch property tax system helps homeowners fund schools, roads, and safety services. Knowing how rates are set, where to pay, and what exemptions apply can save money and avoid penalties. Below are clear answers to the most common queries.

What is the current Antioch CA property tax rate for 2026?

The 2026 rate stands at 1.10 % of the assessed value plus any voter‑approved bonds. For a home assessed at $350,000, the base tax would be $3,850. County‑wide measures may add a few hundred dollars, so check the latest bill for exact figures.

How can I use the Antioch property tax calculator 2026?

Visit the Contra Costa Assessor’s portal, enter the parcel number or address, and select “Tax Calculator.” The tool multiplies the assessed value by the rate, adds special assessments, and shows the total due. It also breaks down amounts for school, fire district, and other fees.

When are Antioch property tax bills due?

Two payments are required each year. The first installment is due November 1 and is delinquent after December 10. The second installment is due February 1 and becomes delinquent after April 10. Paying online through the county’s payment portal avoids mailing delays.

What exemptions are available for seniors in Antioch?

Homeowners 65 or older may qualify for a 50 % reduction on the school portion of the tax bill and a $100 credit for fire district fees. To claim, submit the Senior Citizen Exemption form before the October 15 deadline. Proof of age and residency is required.

How do I appeal an Antioch property tax assessment?

Start by filing a written protest with the Contra Costa Assessor’s Office within 30 days of receiving the assessment notice. Include recent comparable sales, a copy of the assessment notice, and any errors found. A hearing will be scheduled, and if the appeal succeeds, the assessed value will be adjusted.

What steps remove a tax lien on my Antioch property?

First, pay the full amount shown on the lien notice, including penalties. Next, request a lien release form from the assessor’s office and submit proof of payment. Once processed, the county will update the records, clearing the title for sale or refinance.