Stanislaus County Property Tax Appeal, California

Travis Bunn·Updated July 24, 2026

Stanislaus County is located in California's Central Valley with Modesto as the county seat and largest city. The county has an estimated population of approximately 564,000 residents and includes nine incorporated cities including Turlock, Ceres, Riverbank, and Oakdale. With a median home value of approximately $285,200 and an effective property tax rate of 0.66%, Stanislaus County property owners pay a median annual tax bill of $1,874, which is below the national median of $2,400 but represents a significant household expense that warrants careful review of assessments. Property tax appeals are particularly important here because approximately 25% of homes nationwide are overassessed, potentially costing homeowners an average of $1,346 annually in excess taxes.

Notable cities: Modesto, Turlock, Ceres, Riverbank, Oakdale, Patterson

Median Home

$285,200

Tax Rate

0.66%

Annual Tax

$1,874

Population

564,000

On the typical Stanislaus County home, valued near $285,200 at the county’s effective tax rate of 0.66%, an over-assessment of even 10% means you are overpaying year after year until you appeal it. Here is how to find out if yours qualifies.

2026 Appeal Deadline: July 2 through November 30, 2026 for regular assessments

That is at most 97 days away. Your exact date is on your assessment notice, so do not wait on it.

Regular assessment appeals must be filed between July 2nd and November 30th annually. For supplemental assessments (issued when property changes hands or improvements are made), appeals must be filed within 60 days after the date of mailing printed on the tax bill or the postmark, whichever is later.

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California residential street with palm trees at sunset. Stanislaus County appeal guide.

How Stanislaus County Assesses Property

100%of market value

Assessed by: Stanislaus County Assessor's Office

Assessment cycle: annual

Notices typically mailed: February (by February 15th)

California assesses property at 100% of fair market value under Proposition 13, with the assessed value based on the property's purchase price and limited to 2% annual increases. For example: If your home's market value is $285,200 (the county median), at California's 100% assessment ratio your assessed value would be $285,200. After applying the $7,000 homeowner exemption, your taxable assessed value becomes $278,200, resulting in approximately $1,836 in annual taxes at the county's effective rate of 0.66%.

The Appeal Process

Appeals are heard by the Assessment Appeals Board. The Assessment Appeals Board is a quasi-judicial body composed of three members appointed by the Board of Supervisors with professional experience in real estate, property appraisal, accounting, or law. Hearings are formal proceedings where you present evidence supporting your opinion of value, and the Assessor defends the current assessment.

Step 1: Before filing a formal appeal, contact the Assessor's Office at (209) 525-6461 to discuss your assessment informally. Many disputes can be resolved at this stage without a formal hearing.

Step 2: If informal resolution fails, obtain an Assessment Appeal Application from the Clerk of the Board at 1010 10th Street, Suite 6700, online, or by calling (209) 525-6414. The application must be filed between July 2nd and November 30th for regular assessments.

Step 3: Complete the Assessment Appeal Application with property details, your opinion of value, and reasons for the appeal. Include the $30 non-refundable processing fee (payable to County of Stanislaus). Applications submitted without the fee will be returned unprocessed.

Step 4: Submit your application by mail, in-person, or online before the November 30th deadline. You will receive an acknowledgment letter with your Application Number and a notice of hearing at least 45 days before your scheduled hearing date.

Step 5: Gather evidence to support your appeal including comparable sales data, independent appraisals, photos of property condition issues, repair estimates, and any documentation showing your property's market value is lower than the assessed value.

Step 6: Attend your Assessment Appeals Board hearing where a three-member quasi-judicial board with real estate and appraisal expertise will review your case. You may represent yourself or use an authorized agent. The hearing is formal but less stringent than court proceedings.

Step 7: If the Assessment Appeals Board denies your appeal or you disagree with their decision, you may appeal to the California State Board of Equalization within the timeframe specified in your decision letter.

Step 8: As a final option, if administrative appeals are exhausted, you may appeal your assessment in superior court, though this requires legal representation and involves court filing fees.

Required form: Assessment Appeal Application (Applications for Changed Assessment)

Filing Methods

online:E-file system available through the Assessor's website using information from your On-line Property Statement Letter

mail:Clerk of the Board of Supervisors, 1010 10th Street, Suite 6700, Modesto, CA 95354

in-person:1010 10th Street, 6th Floor, Modesto, CA 95354 (Monday-Friday, 8:00 AM - 4:30 PM)

phone:Call (209) 525-6414 to request an application by mail

Evidence to Bring

Comparable sales data from similar properties in your neighborhood sold within the past 6-12 monthsIndependent professional appraisal of your propertyPhotographs documenting property condition, defects, or damageRepair estimates or contractor bids for needed workProperty inspection reportsDocumentation of factors negatively affecting value (flooding, noise, easements, etc.)

Stanislaus County Assessor Contact

Stanislaus County Assessor's Office

Phone: (209) 525-6461

Address: 1010 10th Street, Suite 2400, Modesto, CA 95354

Website: https://www.stancounty.com/assessor/

Online Portal: https://www.stancounty.com/assessor/publicinquiry.shtm

Hours: Monday - Friday: 8:00 AM to 4:30 PM (Closed Saturdays, Sundays & Holidays)

Tax Exemptions in Stanislaus County

Homeowners' Exemption

$7,000 reduction in assessed value (saves approximately $50 annually)

Reduces the assessed value of an owner-occupied primary residence, resulting in property tax savings for eligible homeowners.

Eligibility: Must own and occupy the home as your principal place of residence as of 12:01 AM on January 1st. Only one exemption per household. Property must be owner-occupied, not a rental or investment property.Deadline: February 15th for full exemption; late filing accepted through December 10th for partial (80%) exemption. This is a one-time filing that continues automatically unless ownership or occupancy changes.

Disabled Veterans' Exemption (Basic)

$161,083 to $241,627 reduction in assessed value (2026 amounts, adjusted annually for inflation based on disability rating)

Provides property tax relief for veterans with service-connected disabilities rated by the VA.

Eligibility: Must be a veteran with a service-connected disability or unmarried surviving spouse of such veteran. Single veteran must not have assets over $5,000; married veteran or unmarried surviving spouse must not have assets over $10,000.Deadline: February 15th for full exemption; late filing accepted through December 10th for partial exemption. Basic exemption is a one-time filing.

Disabled Veterans' Exemption (Low-Income)

Additional exemption amount for qualifying low-income disabled veterans

Enhanced exemption for low-income disabled veterans meeting additional income requirements.

Eligibility: Must meet basic disabled veteran requirements plus household income limitations. Must be totally disabled or unemployable as a result of service-connected disability.Deadline: Must be filed annually. Deadline is February 15th, with late filing through December 10th for partial exemption.

Property Tax Postponement Program

State pays property taxes directly to county; repayment required with interest when property is sold or transferred

Allows eligible senior, blind, or disabled homeowners to defer current-year property taxes on their principal residence.

Eligibility: Must be age 62 or older, OR blind, OR disabled; minimum 40% equity in home; household income limit of $51,762 (2026); no reverse mortgage or home equity line of credit.Deadline: Applications accepted on a rolling basis but must be filed before February 10th to defer current-year taxes

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Frequently Asked Questions

What is the deadline to file a property tax appeal in Stanislaus County for 2026?

For regular assessments, you must file your appeal between July 2nd and November 30th, 2026. This is an annual filing window that applies to the assessed value as of January 1, 2026. If you received a supplemental assessment (typically issued after purchasing property or completing improvements), you have 60 days from the mailing date printed on your supplemental tax bill to file an appeal. Missing these deadlines means you must wait until the next filing period, so mark your calendar and file promptly if you believe your assessment is too high.

How much does it cost to file a property tax appeal in Stanislaus County?

There is a $30 non-refundable processing fee for each Assessment Appeal Application filed in Stanislaus County. You must submit this fee with your application, payable to "County of Stanislaus" by check, money order, or cash. Applications submitted without the $30 fee will be returned unprocessed, potentially causing you to miss the filing deadline. The fee may be waived if you qualify for a waiver of court fees and costs under Government Code Section 68511.3, typically based on low income. If you're appealing multiple parcels, you'll need a separate application and $30 fee for each property.

Should I contact the Assessor's Office before filing a formal property tax appeal in Stanislaus County?

Yes, you are strongly urged to discuss your assessment with the Assessor's staff at (209) 525-6461 before filing a formal appeal. Many assessment disputes can be resolved informally through this discussion without going through the formal hearing process, saving you time and the $30 filing fee. The Assessor's office can explain how they arrived at your assessed value, review comparable sales data with you, and correct any errors in property characteristics (such as incorrect square footage or extra bathrooms that don't exist). Even after you file a formal appeal, you can still attempt to reach an agreement with the Assessor any time before your scheduled Assessment Appeals Board hearing.

What happens at an Assessment Appeals Board hearing in Stanislaus County?

Your hearing will be conducted by a three-member Assessment Appeals Board composed of professionals with expertise in real estate, property appraisal, accounting, or law. The hearing is a formal quasi-judicial proceeding where you present evidence supporting your opinion of your property's market value, and the Assessor's office defends the current assessment. You'll have the opportunity to present comparable sales data, appraisals, photographs, and other evidence. The Board will ask questions and review your evidence. You may represent yourself or have an authorized agent represent you. After considering all evidence, the Board will issue a written decision either upholding the current assessment, reducing it to your proposed value, or setting it at a value between the two positions. You'll receive notice of the hearing at least 45 days in advance.

What evidence do I need to win a property tax appeal in Stanislaus County?

The most persuasive evidence is comparable sales data showing what similar properties in your neighborhood sold for within the past 6-12 months, particularly sales occurring close to the January 1st lien date. A professional independent appraisal specifically prepared for property tax appeal purposes carries significant weight. Photographs documenting property condition issues, deferred maintenance, functional obsolescence, or damage are valuable. Written repair estimates from licensed contractors for needed work help quantify value reduction. Also bring documentation of any factors negatively affecting your property's value such as location near commercial or industrial uses, easements, flooding issues, or excessive traffic noise. The key is providing objective market-based evidence that your property's actual fair market value is lower than the Assessor's determined value.

How much can I save by appealing my property taxes in Stanislaus County?

Your potential savings depend on how much your assessment is reduced and Stanislaus County's effective tax rate of 0.66%. For example, if you successfully reduce your assessed value by $50,000, you would save approximately $330 annually in property taxes (0.66% of $50,000). If you reduce it by $100,000, your annual savings would be about $660. These savings continue year after year under California's Proposition 13, which limits annual assessment increases to 2% until the property is sold. Statistics show that approximately 25% of homes are overassessed by an average of $1,346 annually, suggesting significant savings potential for many homeowners who successfully appeal. Your actual savings will depend on the specifics of your case and the evidence you present.

Do I still have to pay my property taxes while my appeal is pending in Stanislaus County?

Yes, you are responsible for paying your full property tax bill to the Treasurer-Tax Collector by the normal due dates while your appeal is pending. The assessment of your property is deemed correct until the Assessment Appeals Board changes it. Failure to pay your taxes on time will result in penalties and interest charges regardless of your pending appeal. If your appeal is successful and your assessment is reduced, you will receive a refund for any overpaid taxes, typically issued after the tax year ends and the reduction is processed. The refund will include interest. Property tax bills are typically due in two installments: the first by December 10th and the second by April 10th.

What is the homeowner exemption worth in Stanislaus County and how do I apply?

The California Homeowners' Exemption reduces your assessed value by $7,000, saving you approximately $46 annually in property taxes at Stanislaus County's 0.66% effective rate. To qualify, you must own and occupy the home as your principal place of residence as of January 1st. This is a one-time filing that continues automatically unless your ownership or occupancy changes. The Assessor's Office typically mails claim forms (Form BOE-266) to new homeowners after recording a deed change. You can also obtain the form by calling (209) 525-6461 or visiting the Assessor's website. The deadline is February 15th for full exemption, with late filing through December 10th providing 80% of the benefit. If you haven't filed for this exemption, you're leaving money on the table every year.

Official Resources

Stanislaus County Assessor's Office - Official Website →

Official county assessor website with property search, exemption forms, assessment information, and online filing access.

Stanislaus County Assessment Appeals Board →

Official appeal filing information, forms, deadlines, and procedures for challenging your property assessment.

California State Board of Equalization - Property Tax Information →

State-level property tax resources including publications, forms, and guidance on California property tax law and appeal rights.

Stanislaus County Property Tax Search - Treasurer-Tax Collector →

Look up and pay property tax bills, check payment status, and access tax collection information and deadlines.

For state-wide appeal information including California's assessment ratio and deadlines, see our California Property Tax Appeal Guide →

Considering professional help with your appeal? Compare pricing, coverage, and pros/cons in our Best Property Tax Appeal Services (2026) or browse side-by-side service comparisons →

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← All California property tax appeal info

Sources: https://www.stancounty.com/assessor/ | https://www.stancounty.com/board/aab/ | https://www.stancounty.com/assessor/appeals.shtm | https://www.tax-rates.org/california/stanislaus_county_property_tax | https://www.ownwell.com/trends/california/stanislaus-county | https://www.stancounty.com/assessor/exemptions.shtm

Last verified: 2026-07-24