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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- Where to file first
- Humboldt County Assessment Appeals Board
- 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
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 nowWhere 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
- Phone
- 707-476-2390
- Hours
- Mon-Fri 8 a.m.-noon, 1-5 p.m.
- Online
- Official website
Assessor[8]
Humboldt County Assessor
- Address
- 825 5th Street, Room 300, Eureka, CA 95501
- Phone
- 707-445-7663
- 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?
| Closes | Area | Who hears it | Status |
|---|---|---|---|
| Nov 30, 2026 | Countywide | Humboldt County Assessment Appeals Board · Official source · Last checked Sep 29, 2026 | Open now |
When were past Humboldt County deadlines?
| Tax year | Window | Office |
|---|---|---|
| 2025 | Closed December 1, 2025 | Humboldt County Assessment Appeals Board |
| 2024 | Closed December 2, 2024 | Humboldt County Assessment Appeals Board |
| 2023 | Closed November 30, 2023 | Humboldt 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]
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).
| Example | Tax 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
- Humboldt County$446,900
- Typical California county$481,100
- Typical US county$185,300
Typical California county $481,100; Humboldt County $446,900; Typical US county $185,300
Median property tax paid: Humboldt County compared
- Humboldt County$2,858
- Typical California county$3,294
- 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
Humboldt County filing windows on a calendar
- Open
- Opens soon
- Forecast
- Humboldt County Assessment Appeals BoardNov 30, 2026 · Open now
The dashed line marks today.
Humboldt County Assessment Appeals Board: Nov 30, 2026
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
- Less than $50,0004%
- $50,000 to $99,9993%
- $100,000 to $199,9994%
- $200,000 to $299,9998%
- $300,000 to $399,99919%
- $400,000 to $499,99925%
- $500,000 to $749,99923%
- $750,000 to $999,9998%
- $1,000,000 to $1,999,9995%
- $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%.
Property taxes owners pay a year
- No real estate taxes6%
- Less than $8007%
- $800 to $1,49912%
- $1,500 to $1,99911%
- $2,000 to $2,99919%
- $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%.
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
- How Comparable Homes Are Chosen, and Why It MattersCalifornia · Humboldt County
- How to Appeal Your Property Taxes YourselfCalifornia · Humboldt County
- Assessed Value vs. Market Value: How They Differ by StateCalifornia · Humboldt County
- Homestead and Other Exemptions to Check FirstCalifornia · Humboldt County
- Homestead Exemption: What It Is and How to Get ItCalifornia · Humboldt County
- How to Lower Your Property Taxes: What to Check FirstCalifornia · Humboldt County
Counties next to Humboldt County
- Trinity County property tax appealsFree check availableNext deadline: Nov 30, 2026
- Mendocino County property tax appealsFree check availableNext deadline: Nov 30, 2026
- Del Norte County property tax appealsFree check availableNext deadline: Nov 30, 2026
- Siskiyou County property tax appealsFree check availableNext deadline: Nov 30, 2026
Check a Humboldt County home free
You decide and file yourself.
Where do these facts come from?
- [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]Assessment Appeal Application (BOE-305-AH) with instructions (Humboldt County, PDF)Official notice, form, calendar or rules · last checked Sep 29, 2026
- [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]Property Value Reviews | Humboldt County, CA - Official WebsiteOfficial guide or FAQ · last checked Sep 27, 2026
- [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]Assessor FAQs | Humboldt County, CAOfficial guide or FAQ · last checked Sep 29, 2026
- [7]Proposition 8 | Humboldt County, CAOfficial guide or FAQ · last checked Sep 29, 2026
- [8]Assessor | Humboldt County, CA - Official WebsiteOfficial guide or FAQ · last checked Oct 1, 2026
- [9]Assessment Appeals Board | Humboldt County, CAOfficial guide or FAQ · last checked Sep 29, 2026
- [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]Publication 30: Residential Property Assessment Appeals (California State Board of Equalization, February 2020)Official guide or FAQ · last checked Sep 25, 2026
- [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]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]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.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25077: Median value (dollars), owner-occupied housing units — Humboldt County, California
- 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.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.