How to Appeal Your Property Tax in California
California homeowners can appeal their property tax assessment if they believe it's too high. This guide covers the 2026 appeal deadline, required evidence, and step-by-step process.
2026 Appeal Deadline: September 15 or November 30
Don't miss your window. Missing the deadline means waiting another full year.
How California Assesses Property
California assesses residential property at 100% of market value.
California assesses property at 100% of the Proposition 13 base-year value, increased no more than 2% per year.
The Appeal Process
Appeals are heard by the Assessment Appeals Board. An informal review is available before filing a formal appeal.
Assessor (Informal)
Assessment Appeals Board
Superior Court
California Appeal Deadline
Deadline: September 15 or November 30
Typical window: July - November
What Overassessment Costs California Homeowners
The median home in California is worth $659,000. If your assessment is just 10% too high, you may be overpaying:
~$468/year
Effective tax rate: 0.71% · Median value: $659,000
Check Your California Assessment
Enter your address to see your estimated overassessment and California filing deadline.
California Counties
Alameda County
Median: $1,090,600 · Rate: 0.80%
Deadline: September 15, 2026
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Butte County
Median: $265,400 · Rate: 0.58%
Deadline: July 2 through November 30, 2026 for regular assessments; within 60 days of receiving a Supplemental Assessment Notice
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Contra Costa County
Median: $548,200 · Rate: 1.17%
Deadline: July 2 through November 30, 2026 for regular assessment appeals; within 60 days of notice date for supplemental or escape assessments
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El Dorado County
Median: $445,700 · Rate: 1.07%
Deadline: July 2 through December 1, 2026 (since November 30, 2026 falls on a Sunday)
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Fresno County
Median: $257,000 · Rate: 1.22%
Deadline: July 2 through November 30, 2026
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Imperial County
Median: $192,600 · Rate: 1.13%
Deadline: July 2 through November 30, 2026 for regular assessment appeals; 60 days from the date of notice for supplemental assessments
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Kern County
Median: $217,100 · Rate: 1.42%
Deadline: July 2 through November 30, 2026
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Los Angeles County
Median: $866,500 · Rate: 0.68%
Deadline: November 30
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Marin County
Median: $868,000 · Rate: 0.63% to 1.38%
Deadline: November 30, 2026
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Merced County
Median: $222,190 · Rate: 1.07%
Deadline: July 2 through November 30, 2026
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Monterey County
Median: $795,000 · Rate: 1.11%
Deadline: July 2, 2026 through December 1, 2026
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Orange County
Median: $1,037,200 · Rate: 0.62%
Deadline: Appeals application of regular annual assessments must be filed between July 2 and November 30.
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Placer County
Median: $464,229 · Rate: 1.14%
Deadline: July 2, 2026 through September 15, 2026
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Riverside County
Median: $601,600 · Rate: 0.75%
Deadline: November 30, 2026
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Sacramento County
Median: $315,351 · Rate: 1.19%
Deadline: December 1, 2026
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San Bernardino County
Median: $438,000 · Rate: 1.20%
Deadline: September 15: Last day to file an application for changed assessment with the clerk of the board or assessment appeals board. The regular appeal filing period runs from July 2 through September 15 in counties where the assessor has provided value notices by August 1 to all assessees of real property on the secured roll. In all other counties, the filing period runs through November 30.
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San Diego County
Median: $750,000 · Rate: 1.21%
Deadline: December 1, 2026 for Fiscal Year 2026-2026
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San Francisco County
Median: $785,200 · Rate: 1.23%
Deadline: September 15, 2026
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San Joaquin County
Median: $318,600 · Rate: 0.73%
Deadline: July 3 through November 30, 2026
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San Mateo County
Median: $1,500,000 · Rate: 1.26%
Deadline: November 30, 2026
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Santa Barbara County
Median: $576,500 · Rate: 1.12%
Deadline: July 2 through December 1, 2026 (since November 30 falls on Sunday)
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Santa Clara County
Median: $1,555,600 · Rate: 0.64%
Deadline: September 15
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Santa Cruz County
Median: $1,143,000 · Rate: 1.26%
Deadline: July 2 through November 30, 2026
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Shasta County
Median: $267,600 · Rate: 1.09%
Deadline: November 30, 2026
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Solano County
Median: $342,310 · Rate: 1.20%
Deadline: November 30, 2026 (or next business day if falls on weekend/holiday)
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Sonoma County
Median: $444,836 · Rate: 1.15%
Deadline: July 2 through November 30, 2026
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Stanislaus County
Median: $314,100 · Rate: 1.15%
Deadline: December 1, 2026 (extended from November 30 because it falls on a Sunday)
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Tulare County
Median: $211,200 · Rate: 1.07%
Deadline: November 30, 2026 (or December 1 if November 30 falls on a weekend)
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Ventura County
Median: $568,700 · Rate: 0.59% to 1.13%
Deadline: July 2, 2025 through September 15, 2025 for Regular Assessment (value as of January 1, 2025); 60 days from notice mailing date for Supplemental/Roll Change/Escape assessments; 6 months from notice date for Calamity Reassessments
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Yolo County
Median: $391,300 · Rate: 1.24%
Deadline: November 30, 2026
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Key Terms for California Homeowners
A local or state government body that hears property tax appeals and decides whether to adjust property assessments.
California Guides & Resources
📋 Property Tax Appeal Deadlines by State: The Complete 2026 Calendar
Filing windows for all 50 states
📋 California Prop 13: Property Tax Appeal Guide
Prop 13 rules and how to file in California
📋 How to Appeal Property Taxes in California: Complete 2026 Guide
Complete guide with deadlines, forms, and step-by-step instructions
📋 How Much Can Property Taxes Increase in California? Prop 13 Explained
2% annual cap under Proposition 13
📅 California Property Tax Appeal Deadlines 2026 by County
California filing deadlines and process
🏦 How to Appeal Property Taxes in Escrow in California (2026)
Yes, you can appeal even if your lender pays your taxes
🔑 Inheriting Property in California: What Happens to Property Taxes (2026)
California reassessment rules, exemptions, and strategies for inherited property
👤 California Senior Property Tax Benefits: Every Exemption, Freeze & Deferral (2026)
Age 55+ exemptions, freezes, and deferrals in California
Average Property Tax Rate by State (2026 Data)
National average is 1.1%. Where does your state rank?
Property Tax Appeal Success Rates by State: 2026 Data & Analysis
Property Tax Appeal Success Rates by State
Property Tax Appeal Success Rates: Real Data by State and County (2026)
National average is 40-60%. See state-by-state data.
Property Tax Appeal Statistics: Success Rates, Savings & Data (2026)
Success rates, savings, and outcomes
Property Tax Appeal Success Rates: What the Data Shows
What the data shows about win rates
Every Property Tax Exemption by State: Senior, Veteran, Homestead & Disability (2026)
Homestead, senior, veteran, disability exemptions for all 50 states
Senior Property Tax Exemptions by State: The Complete 2026 Guide
Age-based discounts in every state
Best Ways to Lower Your Property Taxes (2026): 9 Methods That Work
9 methods that work in 2026
Property Tax Exemptions Guide: 8 Types That Could Save You Thousands (2026)
8 types that could save you thousands
How to Lower Property Taxes Without Filing an Appeal
Exemptions and programs that don't require filing
How to Appeal Property Taxes as a Senior
Age-specific strategies and exemptions
2026 Property Tax Increases: What Homeowners Need to Know
Why assessments are surging and how to respond
Property Tax Appeal vs Exemption: Understanding the Difference & Using Both
Property Tax Appeal vs Exemption
Property Tax Exemptions by State 2026: Complete Guide to Homestead, Senior & Veteran Benefits
Property Tax Exemptions by State 2026
California Homestead Exemption 2026: Save $70 Every Year (Most Homeowners Missing Out)
California's homestead exemption can save you $70 annually.
What Evidence Do I Need for a Property Tax Appeal? (2026)
Comparable sales, photos, and assessment errors
How to Appeal Your Property Taxes: The Complete Guide (2026)
Step-by-step from notice to hearing
Can Appealing Your Property Taxes Actually Raise Them? Here's the Truth
The #1 fear and what actually happens
Property Tax Appeal Letter Template: How to Write a Winning Appeal (2026)
Copy, customize, and send in 15 minutes
What Happens at a Property Tax Appeal Hearing (And How to Prepare)
What to expect and how to prepare
How Much Does a Property Tax Appeal Cost?
DIY, flat-fee, and contingency options
How to Find Comparable Sales for Your Property Tax Appeal
Where to find comps and what makes them strong
How Long Does a Property Tax Appeal Take? Timeline by State
Timeline from filing to decision
What Is the Best Evidence to Protest Property Taxes? Expert Guide (2026)
Recent comparable sales carry the most weight, but combining multiple evidence types increases success.
How to Appeal Property Taxes Without a Lawyer (And When You Might Need One)
DIY vs. hiring a professional
How to Appeal Property Taxes Without an Appraisal: Use Comps Instead
Comps vs. formal appraisals
How to Appeal Property Taxes Without Going to a Hearing
Mail, online, and phone appeal options
How Property Tax Assessments Work: The Complete Guide to Understanding Your Tax Bill
How Property Tax Assessments Work
What Does a Property Tax Appeal Evidence Packet Look Like?
What Does a Property Tax Appeal Evidence Packet...
Property Tax Appeal Strategies for New Homeowners: First-Year Assessment Challenges
Why your first tax bill is often too high — and how to fix it
Mass Appraisal Limitations: How They Lead to Inaccurate Property Taxes
7 flaws in how your county values your home — and how to use them
Is It Worth It to Appeal Property Taxes? (2026 Analysis)
Average savings: $1,100/year
Understanding Your Property Assessment Notice: What Every Homeowner Should Know
What that notice means and what to do next
First-Time Homebuyer's Guide to Property Taxes
What new homeowners need to know
How to Read Your Property Tax Bill
Understanding the numbers and where to look
Is My Property Overassessed? How to Tell
How to tell if you're paying too much
When Should I File My Property Tax Appeal? Critical Deadlines by State (2026)
State-specific deadlines and optimal filing strategies to maximize your chances.
You Just Got Your Property Assessment Notice: Here's Exactly What to Do Next
What to do when your assessment arrives
Divorce and Property Taxes: Who Appeals and How
Divorce and Property Taxes
First-Time Property Tax Appeal: A Beginner's Guide
First
Inherited Property Tax Appeal: Step-by-Step Guide for 2026
Inherited Property Tax Appeal
Is My Property Over-Assessed? 5 Signs You're Overpaying
Is My Property Over
Property Tax Appeal After Natural Disaster: Your Rights & Relief Options
Property Tax Appeal After Natural Disaster
Best Property Tax Appeal Services in 2026: Pricing, Coverage, and What to Know
Pricing, coverage, and what to know
Best DIY Property Tax Appeal Tools & Resources (2026)
Free and paid tools for self-filers
Ownwell Review 2026: Pricing, Results & Is the Fee Worth It?
Pricing, success rates, $50M funding, and cheaper alternatives
Property Tax Appeal After Renovation: What You Need to Know in 2026
When upgrades trigger reassessment
Property Tax Appeals for Investment Properties
Different rules for rentals and commercial
What Happens If You Don't Pay Property Taxes?
Liens, penalties, and how to avoid them
How to Appeal Property Taxes After a Home Renovation: Avoid Over-Assessment
Why renovation cost doesn't equal taxable value — and how to prove it
How Do I Appeal My Property Taxes Myself? Complete DIY Guide
Complete step-by-step instructions
Are Property Tax Protest Companies Worth It? Cost vs. Savings Analysis
Contingency fees vs. flat-fee vs. DIY
What to Write When Protesting Property Taxes: Examples & Templates
Winning phrases and examples
Commercial Property Tax Appeal Strategies That Work in 2026
Commercial Property Tax Appeal Strategies That ...
Property Tax Appeal for Rental Properties: A Landlord's Guide
Property Tax Appeal for Rental Properties
Los Angeles County Property Tax Appeal: Complete 2026 Guide
Los Angeles County Property Tax Appeal
San Diego County Property Tax Appeal Guide: Complete 2026 Process
San Diego County Property Tax Appeal Guide
Property Tax Appeal Resources
Best Appeal Services Compared
7 companies compared — pricing, coverage, and pros/cons for 2026.
2026 Appeal Deadlines
Every state's deadline, filing method, and what happens if you miss it.
Assessment Ratios by State
Every state's assessment percentage — from 4% to 100% — with worked examples.
9 Ways to Lower Your Property Taxes
From homestead exemptions to formal appeals — every method that works.
Savings Calculator
Check if you're overassessed — enter your assessed value to see potential savings.
Flat Fee vs Contingency: Which Saves More?
$49 flat vs 25-50% of savings — see the break-even math at every savings level.
Frequently Asked Questions
How do I appeal my property tax in California?
What is the California property tax appeal deadline?
What is California's property tax assessment ratio?
How much can I save by appealing in California?
What evidence do I need for a California property tax appeal?
What is the effective property tax rate in California?
Can I file a California property tax appeal online?
Ready to Appeal Your California Property Tax?
Enter your address for a free overassessment analysis. If the numbers support a appeal, your complete evidence packet is $49.