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California · County guide

Humboldt County, California property tax appeals

A Humboldt County property tax appeal starts with the Humboldt County Assessment Appeals Board. The next deadline is Nov 30, 2026 for the Humboldt County Assessment Appeals Board.

This season

Next deadline
Nov 30, 2026
Open now
Humboldt County Assessment Appeals Board

Opens Jul 2, 2026Closes Nov 30, 2026

Source: Letter To Assessors No. 2026/023: County Assessment Appeals Filing Period for 2026 (BOE, June 2, 2026)Last checked

Check a Humboldt County home for free

Here the check uses your own figures: you enter the assessed value from your notice or tax bill and the year you bought. We compare how much it has grown with the house price index for your area and show the numbers as your figures. You decide and file yourself.

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I couldn’t believe the difference. My property assessment was reduced by $112,000. I’m extremely happy with the outcome!

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A $106,300 reduction

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Megan HollisHomeowner
Office address
Clerk of the Board's Office, Humboldt County Courthouse, 825 Fifth St., Room 111, Eureka, CA 95501 · 707-476-2390
Our coverage
Free check available
  • Independent guide — not affiliated with Humboldt County or any government agency.
Last updated
October 1, 2026
Sources last checked
October 1, 2026
Status
Verified guide

How we verify facts

When and where do I file a Humboldt County property tax appeal?

Who hears a Humboldt County appeal?

One stage. We are not affiliated with this office.

Who hears it: Humboldt County Assessment Appeals Board

Filing: appeal

Open now

Where is the Humboldt County office?

Humboldt County Assessment Appeals Board[9]

Address
Clerk of the Board's Office, Humboldt County Courthouse, 825 Fifth St., Room 111, Eureka, CA 95501
Hours
Mon-Fri 8 a.m.-noon, 1-5 p.m.

Assessor[8]

Humboldt County Assessor

Address
825 5th Street, Room 300, Eureka, CA 95501
Fax
707-445-7410
Hours
Monday-Thursday 8:30 a.m.-5 p.m.; closed to the public on Fridays (reachable by phone or email)

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

Which Humboldt County filing windows are coming up?

Humboldt County filing windows
ClosesAreaWho hears itStatus
Nov 30, 2026CountywideHumboldt County Assessment Appeals Board · Official source · Last checked Sep 29, 2026Open now

When were past Humboldt County deadlines?

Past Humboldt County filing windows
Tax yearWindowOffice
2025Closed December 1, 2025Humboldt County Assessment Appeals Board
2024Closed December 2, 2024Humboldt County Assessment Appeals Board
2023Closed November 30, 2023Humboldt County Assessment Appeals Board

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

The soonest deadline we list: Humboldt County, Humboldt County Assessment Appeals Board — Closes November 30, 2026.

When a filing counts as on timeHumboldt County Assessment Appeals Board
Humboldt County appeal applications must be postmarked by the November 30 deadline, even while an informal review with the Assessor is pending.[1]

Who decides a property tax appeal in Humboldt County?

The Humboldt County Assessment Appeals Board's decision is final and not reheard; the owner or the Humboldt County Assessor may seek review in superior court. Humboldt County Assessment Appeals Board: In Humboldt County the filing is an assessment appeal on the Assessment Appeal Application (BOE-305-AH), heard by the Humboldt County Assessment Appeals Board.

Appeal stepsHumboldt County Assessment Appeals Board
The Humboldt County Assessment Appeals Board's decision is final and not reheard; the owner or the Humboldt County Assessor may seek review in superior court.[2]
What the appeal is calledHumboldt County Assessment Appeals Board
In Humboldt County the filing is an assessment appeal on the Assessment Appeal Application (BOE-305-AH), heard by the Humboldt County Assessment Appeals Board.[2]

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

Humboldt County Assessment Appeals Board: In Humboldt County you get the Application for Changed Assessment from the Clerk of the Assessment Appeals Board (707-476-2390) and file it with the Clerk. Humboldt County Assessment Appeals Board: Humboldt County publishes its own copy of the Assessment Appeal Application (BOE-305-AH) with filing instructions.

How to fileHumboldt County Assessment Appeals Board
In Humboldt County you get the Application for Changed Assessment from the Clerk of the Assessment Appeals Board (707-476-2390) and file it with the Clerk.[1]
FormsHumboldt County Assessment Appeals Board
Humboldt County publishes its own copy of the Assessment Appeal Application (BOE-305-AH) with filing instructions.[2]
Filing feeHumboldt County Assessment Appeals Board · Findings of fact
Humboldt County's 2026 fee schedule charges $50 for Assessment Appeals Board findings of fact on a single-family home ($100 per parcel for other property), plus $250 an hour after the first hour.[3]
Who may fileHumboldt County Assessment Appeals Board
On the Humboldt County application, an agent must be authorized in writing unless the agent is a California attorney or the owner's spouse, child, parent or registered domestic partner.[2]
Informal reviewHumboldt County Assessment Appeals Board
In Humboldt County you can ask the Assessor for an informal Proposition 8 review by mailing or faxing the review form.[4]

Upcoming appeal deadlines in every county we track

What evidence counts in Humboldt County, and can the value go up?

What evidence can I use in Humboldt County?

Humboldt County Assessment Appeals Board: Humboldt County's instructions ask for comparable sales, cost and income data, where relevant, to support the owner's opinion of value. Humboldt County Assessment Appeals Board · Exchange: Before a Humboldt County hearing, the owner may ask for an exchange of information with the Assessor; above $100,000 of assessed value the Assessor may start one.

Evidence acceptedHumboldt County Assessment Appeals Board
Humboldt County's instructions ask for comparable sales, cost and income data, where relevant, to support the owner's opinion of value.[2]
Evidence ruleHumboldt County Assessment Appeals Board · Exchange
Before a Humboldt County hearing, the owner may ask for an exchange of information with the Assessor; above $100,000 of assessed value the Assessor may start one.[2]

Can my assessment go up if I appeal in Humboldt County?

Humboldt County Assessment Appeals Board: Humboldt County's appeal instructions say the Humboldt County Assessment Appeals Board can raise, lower or keep the assessment, depending on the hearing evidence.

Can the value go up?Humboldt County Assessment Appeals Board
Humboldt County's appeal instructions say the Humboldt County Assessment Appeals Board can raise, lower or keep the assessment, depending on the hearing evidence.[2]

Which exemptions can lower my bill without an appeal?

Humboldt County's Assessor offers the Homeowners' Exemption of up to $7,000 of assessed value for a home that is the owner's principal residence at 12:01 a.m. on January 1.

Homeowner exemption
Humboldt County's Assessor offers the Homeowners' Exemption of up to $7,000 of assessed value for a home that is the owner's principal residence at 12:01 a.m. on January 1.[5]

What do Humboldt County property taxes and assessments look like?

Figures from public records and the Census, each with its source. They describe the county's homes as a group, not the value of any one home.

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

Tax rate used: 1.093% of assessed value (county average, fiscal 2024-25).

How much could a lower assessment save on Humboldt County property taxes?
ExampleTax saved
$10,000 less assessed value$109 a year
10% less on a home assessed at $446,900 (the Census median home value)$488 a year

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 Humboldt County pay in property tax?

The median owner-occupied home in Humboldt County was worth $446,900, and the median property tax its owners paid was $2,858 a year, according to the Census Bureau's American Community Survey.

Median home value
$446,900
Margin of error ±$8,723.
Median property tax paid per year
$2,858
Margin of error ±$93.
Median tax as a share of median value
0.64%
A ratio of two medians, not a tax rate. Your own bill depends on your assessment and local levies.
Owner-occupied homes
31,053
Margin of error ±881.

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.

Median home value: Humboldt County compared

  1. Humboldt County$446,900
  2. Typical California county$481,100
  3. Typical US county$185,300

Typical California county $481,100; Humboldt County $446,900; Typical US county $185,300

Census survey medians for owner-occupied homes. "Typical" is the middle county of the 58 in California and of all US counties.Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25077.

Median property tax paid: Humboldt County compared

  1. Humboldt County$2,858
  2. Typical California county$3,294
  3. Typical US county$1,619

Typical California county $3,294 a year; Humboldt County $2,858 a year; Typical US county $1,619 a year

Census survey medians for owner-occupied homes. "Typical" is the middle county of the 58 in California and of all US counties.Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25103.

Humboldt County filing windows on a calendar

  1. Humboldt County Assessment Appeals BoardNov 30, 2026 · Open now

The dashed line marks today.

Humboldt County Assessment Appeals Board: Nov 30, 2026

Each bar is a filing window from its opening day to its last day. Forecasts show the expected closing range and are not official dates.Source: the official calendars and rules cited in the sources list below.

How often is property reassessed in Humboldt County?

Humboldt County does not reassess the original property unless there is new construction or a change of ownership. Humboldt County measures a decline in market value as of the January 1 lien date.

Reassessment cycle
Humboldt County does not reassess the original property unless there is new construction or a change of ownership.[6]
Valuation date
Humboldt County measures a decline in market value as of the January 1 lien date.[7]
Level of assessmentDecline in value
The Humboldt County Assessor enrolls the lesser of the Prop 13 factored base year value and the January 1 market value each year.[7]

Homes in Humboldt County

From the Census Bureau's American Community Survey: how old the homes are, what kind they are, what owners say they are worth and the property taxes they pay. These figures describe all homes together, not any one home.

Median year built
1973
All housing units, owned and rented
Single-family houses, detached or attached
74%
of 62,883 housing units
Owned homes with a mortgage or similar loan
53%
of 31,053 owner-occupied homes

Home values reported by owners

  1. Less than $50,0004%
  2. $50,000 to $99,9993%
  3. $100,000 to $199,9994%
  4. $200,000 to $299,9998%
  5. $300,000 to $399,99919%
  6. $400,000 to $499,99925%
  7. $500,000 to $749,99923%
  8. $750,000 to $999,9998%
  9. $1,000,000 to $1,999,9995%
  10. $2,000,000 or more1%

Home values reported by owners in Humboldt County: Less than $50,000 4%; $50,000 to $99,999 3%; $100,000 to $199,999 4%; $200,000 to $299,999 8%; $300,000 to $399,999 19%; $400,000 to $499,999 25%; $500,000 to $749,999 23%; $750,000 to $999,999 8%; $1,000,000 to $1,999,999 5%; $2,000,000 or more 1%.

Share of owner-occupied homes in each value range. Owners give this value in the survey; it is not the assessed value.Source: U.S. Census Bureau, American Community Survey, 2020–2024 5-year estimates, table B25075.

Property taxes owners pay a year

  1. No real estate taxes6%
  2. Less than $8007%
  3. $800 to $1,49912%
  4. $1,500 to $1,99911%
  5. $2,000 to $2,99919%
  6. $3,000 or more44%

Property taxes owners pay a year in Humboldt County: No real estate taxes 6%; Less than $800 7%; $800 to $1,499 12%; $1,500 to $1,999 11%; $2,000 to $2,999 19%; $3,000 or more 44%.

Share of owner-occupied homes by the real estate taxes paid in a year, with or without a mortgage.Source: U.S. Census Bureau, American Community Survey, 2020–2024 5-year estimates, table B25102.

Source: U.S. Census Bureau, American Community Survey (2020–2024 5-year estimates, tables B25075, B25102, B25035, B25024 and B25081), retrieved Oct 1, 2026. Survey estimates have a margin of error.

More questions about Humboldt County property tax appeals

When is the Humboldt County property tax appeal deadline?

The Humboldt County Assessment Appeals Board window closes November 30, 2026.[10][11]

Is there a fee to file a property tax appeal in Humboldt County?

Humboldt County's 2026 fee schedule charges $50 for Assessment Appeals Board findings of fact on a single-family home ($100 per parcel for other property), plus $250 an hour after the first hour.[3]

Where do I file an assessment appeal in Humboldt County?

In Humboldt County you get the Application for Changed Assessment from the Clerk of the Assessment Appeals Board (707-476-2390) and file it with the Clerk.[1]

Can my assessed value go up if I appeal in Humboldt County?

Humboldt County's appeal instructions say the Humboldt County Assessment Appeals Board can raise, lower or keep the assessment, depending on the hearing evidence.[2]

What other rules apply in Humboldt County?

Humboldt County Assessment Appeals Board: Filing a Humboldt County appeal does not postpone the tax bill: taxes are still due by the dates on the bill.

Paying the tax while you appealHumboldt County Assessment Appeals Board
Filing a Humboldt County appeal does not postpone the tax bill: taxes are still due by the dates on the bill.[2]

Property tax guides for Humboldt County homeowners

Counties next to Humboldt County

California property tax appeals: all counties

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Where do these facts come from?

  1. [1]2026-2027 Request for Informal Assessment Review (Proposition 8 Review) Form (Humboldt County Assessor, PDF)Official notice, form, calendar or rules · last checked Sep 29, 2026
  2. [2]Assessment Appeal Application (BOE-305-AH) with instructions (Humboldt County, PDF)Official notice, form, calendar or rules · last checked Sep 29, 2026
  3. [3]2026 Humboldt County Schedule of Fees and Charges, Section B - Governance (XLSX)Official notice, form, calendar or rules · last checked Sep 30, 2026
  4. [4]Property Value Reviews | Humboldt County, CA - Official WebsiteOfficial guide or FAQ · last checked Sep 27, 2026
  5. [5]Claim for Homeowners' Property Tax Exemption (BOE-266), Humboldt County Assessor (PDF)Official notice, form, calendar or rules · last checked Sep 30, 2026
  6. [6]Assessor FAQs | Humboldt County, CAOfficial guide or FAQ · last checked Sep 29, 2026
  7. [7]Proposition 8 | Humboldt County, CAOfficial guide or FAQ · last checked Sep 29, 2026
  8. [8]Assessor | Humboldt County, CA - Official WebsiteOfficial guide or FAQ · last checked Oct 1, 2026
  9. [9]Assessment Appeals Board | Humboldt County, CAOfficial guide or FAQ · last checked Sep 29, 2026
  10. [10]Letter To Assessors No. 2026/023: County Assessment Appeals Filing Period for 2026 (BOE, June 2, 2026)Official notice, form, calendar or rules · last checked Sep 25, 2026
  11. [11]Publication 30: Residential Property Assessment Appeals (California State Board of Equalization, February 2020)Official guide or FAQ · last checked Sep 25, 2026
  12. [12]Letter To Assessors No. 2025/020: County Assessment Appeals Filing Period for 2025 (BOE, July 7, 2025)Official notice, form, calendar or rules · last checked Oct 1, 2026
  13. [13]Letter To Assessors No. 2024/022: County Assessment Appeals Filing Period for 2024 (BOE, June 25, 2024)Official notice, form, calendar or rules · last checked Oct 1, 2026
  14. [14]Letter To Assessors No. 2023/023: County Assessment Appeals Filing Period for 2023 (BOE, June 22, 2023)Official notice, form, calendar or rules · last checked Oct 1, 2026
  15. 15.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25077: Median value (dollars), owner-occupied housing units — Humboldt County, California
  16. 16.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25103: Median real estate taxes paid, owner-occupied housing units — Humboldt County, California
  17. 17.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25003: Tenure (owner- and renter-occupied housing units) — Humboldt County, California

Data credits: Census ACS (public domain) · Census county adjacency (public domain)

Not affiliated with Humboldt County or any government agency. Not legal advice. Not an appraisal.