Marin County Property Tax Appeal, California

Travis Bunn·Updated July 24, 2026

Marin County is located in the northwestern San Francisco Bay Area of California, with San Rafael serving as both the county seat and largest city by population. With approximately 253,000-262,000 residents spread across 11 incorporated cities including Novato, Mill Valley, Sausalito, and San Anselmo, Marin is known for its high property values and quality of life. Property tax appeals are particularly important here given the county's extraordinarily high median home values, which can lead to substantial tax savings even with small percentage reductions in assessed value. The county's median home value of $1,390,000 is nearly five times the national median, yet its effective tax rate of 0.72% remains below the national average of 0.91%, resulting in median annual tax bills of approximately $10,001 that rank among the highest in California.

Notable cities: San Rafael, Novato, Mill Valley, Sausalito, San Anselmo, Corte Madera, Larkspur

Median Home

$1,390,000

Tax Rate

0.72%

Annual Tax

$10,001

Population

253,694

On the typical Marin County home, valued near $1,390,000 at the county’s effective tax rate of 0.72%, 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: November 30, 2026

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

The regular appeal filing period for the 2026-27 tax year runs from July 2, 2026 through November 30, 2026. For supplemental assessments resulting from a change in ownership or new construction, appeals must be filed within 60 days from the mailing date printed on your supplemental notice. Marin County uses the November 30 deadline rather than the September 15 deadline used by some other California counties.

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

How Marin County Assesses Property

100%of market value

Assessed by: Marin County Assessor-Recorder-County Clerk

Assessment cycle: annual

Notices typically mailed: Spring (typically mid-May)

In California, properties are assessed at 100% of their factored base year value under Proposition 13, with annual increases capped at 2% until a change of ownership triggers reassessment to current market value. For example, if your Marin County home's current market value is $1,390,000 and you recently purchased it, your assessed value would be $1,390,000 at the 100% assessment ratio, resulting in approximately $10,008 in annual property taxes at the county's 0.72% effective rate. Properties may receive temporary Proposition 8 reductions when market value falls below the factored base year value.

The Appeal Process

Appeals are heard by the Assessment Appeals Board. Hearings are conducted in person at the Board of Supervisors' meeting room, typically on Fridays from 9:00 a.m. to 5:00 p.m. You will present your evidence to a three-member panel appointed by the Board of Supervisors, and the Assessor's Office will present their evidence supporting the current assessment. The Board has up to two years to render a decision, though most cases are resolved within 6-12 months.

Step 1: Request an informal review with the Assessor's Office between July 1 and October 31 by calling 415-473-7215. The Assessor may be able to correct errors or explain your assessment without requiring a formal hearing, and this informal process is free.

Step 2: If the informal review does not resolve your concerns, download or request the Assessment Appeal Application from the Assessment Appeals Board Clerk. Complete the application in blue ink with your property information, current assessed value, and your opinion of the correct value.

Step 3: Gather supporting evidence including recent comparable sales data, professional appraisals, photographs of property condition, repair estimates for any defects, and the Residential Property Tax Comparison Worksheet to demonstrate why your assessment exceeds fair market value.

Step 4: File your completed application with the Assessment Appeals Board Clerk by mail or in-person at 3501 Civic Center Drive, Suite 329, San Rafael, CA 94903 between July 2 and November 30, 2026, along with a $50 non-refundable processing fee (check or money order payable to 'County of Marin').

Step 5: After filing, you will receive a confirmation letter. If your application is complete, you will receive a Notice of Hearing letter and Hearing Date Confirmation form in the mail 45 days before your scheduled hearing date.

Step 6: Attend your scheduled hearing in person before the Assessment Appeals Board and present your case with supporting evidence. Failure to attend will result in automatic denial. The Board will issue a decision that can increase, decrease, or maintain your assessment, with refunds issued by the Department of Finance if approved.

Step 7: If you disagree with the Assessment Appeals Board decision, you may file an appeal with the California Superior Court within the timeframe specified in your decision letter, or contact the California State Board of Equalization for guidance on further appeals.

Required form: Assessment Appeal Application (available from the Assessment Appeals Board Clerk)

Filing Methods

mail:Mail to: Clerk of the Board, Assessment Appeals Board, 3501 Civic Center Drive, Suite 329, San Rafael, CA 94903

in-person:Drop off at: 3501 Civic Center Drive, Suite 329, San Rafael, CA 94903 during business hours

online:Download application at https://www.marincounty.gov/departments/board/appeal-your-property-tax-assessment

Evidence to Bring

Recent comparable sales (preferably within last 6 months and same neighborhood)Professional appraisal reportPhotographs showing property condition or defectsContractor repair estimates for any damageResidential Property Tax Comparison WorksheetPrevious assessment notices

Marin County Assessor Contact

Marin County Assessor-Recorder-County Clerk

Website: https://www.arcc.marincounty.gov

Online Portal: https://apps.marincounty.gov/TaxRollSearch

Hours: Monday - Friday, 9:00 AM - 4:00 PM

Tax Exemptions in Marin County

Homeowners' Exemption

$7,000 reduction in assessed value (approximately $70 annual savings)

Reduces the assessed value of your primary residence, lowering your annual property tax bill

Eligibility: Must own and occupy the property as your primary residence on January 1 of the tax yearDeadline: February 15 for full exemption (file once and it renews automatically); February 16 - December 10 for 80% partial exemption

Disabled Veterans' Exemption - Basic

$180,671 reduction in assessed value for 2026 (adjusted annually for inflation)

Reduces assessed value for veterans with 100% service-connected disability rating

Eligibility: Veterans rated 100% disabled by the VA or military service due to service-connected injury or disease, or unmarried surviving spouses of qualifying veteransDeadline: File between qualification date and following January 1, or within 90 days of qualification (whichever is later) for full first-year exemption

Disabled Veterans' Exemption - Low Income

$271,009 reduction in assessed value for 2026 (adjusted annually for inflation)

Enhanced exemption for low-income disabled veterans with household income restrictions

Eligibility: 100% disabled veterans whose household income does not exceed $81,131 (2026 limit, adjusted annually)Deadline: January 1 - February 15 annually (must file each year to verify income eligibility)

Property Tax Postponement

Full deferral of current property taxes (becomes lien on property)

State program allowing seniors to defer property tax payments until property is sold or transferred

Eligibility: Seniors age 62+ with limited income who own and occupy the property as primary residenceDeadline: February 10 annually (administered by State Controller's Office)

Senior Parcel Tax Exemptions

Varies by district and parcel tax amount

Exemptions from various local parcel taxes for school districts and special districts

Eligibility: Generally age 65+ using property as principal residence; each district administers its own exemption with varying income limitsDeadline: Varies by district; contact individual taxing agencies for specific deadlines

Marin County Appeal Statistics

Avg Reduction

$3,377

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Frequently Asked Questions

What is the deadline to appeal my property taxes in Marin County for 2026?

The deadline to file a property tax appeal in Marin County is November 30, 2026, for regular assessment appeals based on the January 1, 2026 lien date valuation. The filing period opens July 2, 2026, and runs through November 30, 2026. For supplemental assessments resulting from a change in ownership or new construction, you have 60 days from the mailing date printed on your supplemental notice to file an appeal. Before filing a formal appeal, you can request an informal review with the Assessor's Office between July 1 and October 31. It's important to note that filing an appeal does not delay your property tax payment obligations - you must still pay your tax bill by the delinquency dates to avoid penalties, even while your appeal is pending.

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

Filing a property tax appeal in Marin County requires a $50 non-refundable processing fee for each application or parcel. This fee must be submitted with your completed Assessment Appeal Application and can be paid by check or money order made payable to 'County of Marin.' The fee is required whether you file by mail or in-person at the Assessment Appeals Board Clerk's office. Before paying the filing fee, you may want to request a free informal review with the Assessor's Office between July 1 and October 31, as they may be able to correct errors or explain your assessment without requiring a formal appeal hearing.

What is the homestead exemption worth in Marin County?

The Homeowners' Exemption in Marin County provides a $7,000 reduction in your property's assessed value, which translates to approximately $70 in annual property tax savings. If you own and occupy your home as your primary residence on January 1, you qualify for this exemption. You only need to file once with the Assessor's Office using Form BOE-266, and the exemption will automatically renew each year as long as you continue to meet the eligibility requirements. If you file between February 16 and December 10, you may receive only a partial exemption (80%) for that year. To apply, contact the Marin County Assessor Exemptions Division at 415-473-3794 or download the form from the county website.

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

At your Assessment Appeals Board hearing in Marin County, you will appear in person before a three-member panel appointed by the Board of Supervisors, typically in the Board of Supervisors' meeting room on a Friday between 9:00 a.m. and 5:00 p.m. You'll receive a Notice of Hearing letter 45 days before your scheduled date. During the hearing, you present your evidence (comparable sales, appraisals, photos, repair estimates) demonstrating why your property's assessed value should be reduced, and the Assessor's Office presents evidence supporting their current assessment. The Board will issue a decision that can increase, decrease, or maintain your assessment. Attendance is mandatory - if you don't appear at your scheduled hearing, the Assessment Appeals Board will automatically deny your application. Most decisions are rendered within 6-12 months, and if your appeal is successful, refunds are issued by the Department of Finance.

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

In Marin County, successful property tax appeals save homeowners an average of $3,377 per year. Given the county's extraordinarily high median home value of $1,390,000 and effective tax rate of 0.72%, even a modest 5% reduction in assessed value (from $1,390,000 to $1,320,500) would save approximately $501 annually, while a 10% reduction would save about $1,001 per year. These savings are recurring - they continue every year until your next reassessment event (typically when you sell or make major improvements). For homeowners with multimillion-dollar properties in areas like Ross or Sausalito, the savings potential is even greater. Over a 30-year mortgage term, cumulative property tax savings from a successful appeal can easily exceed tens of thousands of dollars.

What evidence do I need for a Marin County property tax appeal?

For a successful property tax appeal in Marin County, you need recent comparable sales from the last 6 months showing similar homes in your neighborhood that sold for less than your assessed value. A professional appraisal report prepared by a licensed appraiser as of the January 1 lien date is highly persuasive evidence. You should also provide photographs documenting any property defects, damage, or conditions that reduce value, along with contractor repair estimates for any needed work. Complete the Residential Property Tax Comparison Worksheet (available from the Assessment Appeals Board) to analyze comparable properties. Previous assessment notices showing your property's value history can also be helpful. The key is demonstrating that your property's fair market value as of January 1 was less than the assessed value on your tax roll.

Can I appeal my Marin County property taxes if I just bought my home?

Yes, you can appeal your property taxes in Marin County even if you recently purchased your home, though it can be more challenging since the purchase price is typically considered strong evidence of market value. However, there are valid grounds for appeal even after purchase: if you bought in a declining market and values have dropped since closing, if you purchased a distressed property requiring extensive repairs, if there were errors in how the Assessor recorded the transaction, or if comparable sales since your purchase show lower values. You would file an appeal for a supplemental assessment within 60 days of receiving your supplemental notice, or wait until the regular July 2 - November 30 filing period to appeal the following year's assessment. First-time buyers should carefully review their assessment notices for any errors and gather comparable sales evidence if market conditions have changed.

How does Proposition 8 temporary reduction work in Marin County?

Proposition 8 in Marin County provides temporary property tax relief when your home's current market value falls below its Proposition 13 factored base year value. The Assessor reviews properties annually and may automatically apply a Proposition 8 reduction if they determine market value has declined - you'll receive a Property Assessment Value Notice if this happens. The reduction is temporary, meaning your assessed value will increase back up to your factored base year value (plus 2% annual growth) as the market recovers, but it will never exceed your Proposition 13 base. If you believe your property qualifies for a Proposition 8 reduction but the Assessor hasn't applied one, you can request an informal review with the Assessor's Office at 415-473-7215 or file a formal appeal by November 30. If your appeal is approved and you already paid your taxes, you'll receive a refund from the Marin County Department of Finance within 1-2 months.

Official Resources

Marin County Assessor-Recorder-County Clerk Official Website →

Official county assessor website with property information, exemption forms, assessment tools, and contact information for all assessment-related services.

Marin County Assessment Appeals Board - File an Appeal →

Download appeal application forms, view filing instructions, and access the Residential Property Tax Comparison Worksheet for preparing your appeal.

Marin County Property Tax Search and Assessment Records →

Search your property's current assessed value, view parcel maps, check assessment history, and access official county property records online.

California State Board of Equalization - Property Tax Information →

State-level property tax resources including exemption forms, appeal procedures, Proposition 13 information, and taxpayer rights under California law.

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 →

More California Counties

Alameda County (Oakland)Butte County (Chico)Contra Costa County (Martinez)El Dorado County (Placerville)Fresno County (Fresno)Imperial County (El Centro)

← All California property tax appeal info

Sources: https://www.arcc.marincounty.gov | https://www.marincounty.gov/departments/board/appeal-your-property-tax-assessment | https://propertytaxrates.org/counties/california/marin-county/ | https://www.appealdesk.com/appeals/california/marin | https://www.arcc.marincounty.gov/popular-services/homeowners-exemptions | https://valoannetwork.com/property-tax-exemptions/california/

Last verified: 2026-07-24