Marin County, California property tax appeals

Who hears a Marin County appeal?

One stage. We are not affiliated with this office.

Where is the Marin County office?

We are not affiliated with this office. Hours can change, so call before you visit.

Which Marin County filing windows are coming up?

When were past Marin County deadlines?

When is the deadline to appeal a property tax assessment in Marin County?

The soonest deadline we list: Marin County, Marin County appeals board (Clerk of the Board of Supervisors) — Closes November 30, 2026.

When a filing counts as on timeMarin County appeals board (Clerk of the Board of Supervisors)

Marin County's regular appeal period runs July 2 to November 30, by 5:00 p.m.[1]

Who decides a property tax appeal in Marin County?

Marin County appeals board (Clerk of the Board of Supervisors): In Marin County, if a disagreement with the Assessor is not resolved by November 1, the owner can appeal to the independent Assessment Appeals Board by filing between July 2 and November 30. Marin County appeals board (Clerk of the Board of Supervisors): In Marin County an owner who disagrees with an assessment files an Assessment Appeal application; the Assessment Appeals Board hears the case.

Appeal stepsMarin County appeals board (Clerk of the Board of Supervisors)

In Marin County, if a disagreement with the Assessor is not resolved by November 1, the owner can appeal to the independent Assessment Appeals Board by filing between July 2 and November 30.[2]

What the appeal is calledMarin County appeals board (Clerk of the Board of Supervisors)

In Marin County an owner who disagrees with an assessment files an Assessment Appeal application; the Assessment Appeals Board hears the case.[1]

How do I file a property tax appeal in Marin County?

Marin County appeals board (Clerk of the Board of Supervisors): Marin County appeal applications are filled out in blue ink and mailed or dropped off with the fee; the form can be downloaded, picked up, or mailed to you. Marin County appeals board (Clerk of the Board of Supervisors): Marin County provides the Assessment Appeal application and a Residential Property Tax Comparison Work Sheet.

How to fileMarin County appeals board (Clerk of the Board of Supervisors)

Marin County appeal applications are filled out in blue ink and mailed or dropped off with the fee; the form can be downloaded, picked up, or mailed to you.[1]

FormsMarin County appeals board (Clerk of the Board of Supervisors)

Marin County provides the Assessment Appeal application and a Residential Property Tax Comparison Work Sheet.[1]

Filing feeMarin County appeals board (Clerk of the Board of Supervisors)

Marin County charges a $50 non-refundable processing fee, by check or money order payable to County of Marin.[1]

Who may fileMarin County appeals board (Clerk of the Board of Supervisors)

Marin County applicants need no professional representative; an agent needs the owner's authorization on or attached to the application.[3]

HearingsMarin County appeals board (Clerk of the Board of Supervisors)

Marin County mails a Notice of Hearing 45 days ahead; the confirmation form is due 21 days before, and the hearing is attended in person or the application is denied.[1]

How much could a lower assessment save on Marin County property taxes?

Tax rate used: 1.133% of assessed value (county average, fiscal 2024-25).

These are examples: the tax rate times a lower assessed value. Exemptions, credits, caps and phase-ins can make the real change smaller. This is not a prediction for any home. Rate source: BOE Annual Report 2024-25, Table 14: average tax rate by county (Property Tax Allocations, BOE Open Data Portal).

What do homeowners in Marin County pay in property tax?

The median owner-occupied home in Marin County was worth $1,507,300, and the median property tax its owners paid was $10,000 or more a year, according to the Census Bureau's American Community Survey.

Median home value

$1,507,300

Margin of error ±$27,346.

Median property tax paid per year

$10,000 or more

The Census Bureau publishes medians in the top bracket only as a floor.

Median tax as a share of median value

at least 0.66%

The tax median is top-coded, so the true ratio is higher. A ratio of two medians, not a tax rate.

Owner-occupied homes

66,616

Margin of error ±1,123.

These are survey estimates of what owners reported about their own homes. They are not assessed values, not tax rates, and not an opinion of what any home is worth.

They cannot tell you whether your own assessment is fair. That takes a comparison with similar homes, which we offer only in counties we have researched.

How often is property reassessed in Marin County?

Unless a Marin County property changes ownership or has new construction, its assessed value can never rise above the factored base year value (up 2% a year at most); Prop 8 reduced values are reviewed every January 1. Marin County compares market value on January 1 with the assessed value.

Reassessment cycle

Unless a Marin County property changes ownership or has new construction, its assessed value can never rise above the factored base year value (up 2% a year at most); Prop 8 reduced values are reviewed every January 1.[2]

Valuation date

Marin County compares market value on January 1 with the assessed value.[2]

Level of assessmentDecline in value

Under Prop 8, a Marin County property may get temporary relief when its January 1 market value is below its assessed value.[2]

What other rules apply in Marin County?

Marin County appeals board (Clerk of the Board of Supervisors): In Marin County an informal review or appeal does not delay tax due dates; taxes must be paid on time to avoid penalties.

Paying the tax while you appealMarin County appeals board (Clerk of the Board of Supervisors)

In Marin County an informal review or appeal does not delay tax due dates; taxes must be paid on time to avoid penalties.[2]