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California · County guide

Lake County, California property tax appeals

A Lake County property tax appeal starts with the Lake County appeals board (Clerk of the Board of Supervisors). The next deadline is Nov 30, 2026 for the Lake County appeals board (Clerk of the Board of Supervisors). The filing fee is $35.

This season

Next deadline
Nov 30, 2026
Open now
Lake County appeals board (Clerk of the Board of Supervisors)

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

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Filing fee
$35
Where to file first
Lake County appeals board (Clerk of the Board of Supervisors)
Office address
255 N Forbes Street, Lakeport, CA 95453 · 707-263-2368
Our coverage
Free check available
  • Independent guide — not affiliated with Lake 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 Lake County property tax appeal?

Who hears a Lake County appeal?

One stage. We are not affiliated with this office.

Who hears it: Lake County appeals board (Clerk of the Board of Supervisors)

Filing: appeal

Open now

Where is the Lake County office?

Lake County appeals board (Clerk of the Board of Supervisors)[2]

Address
255 N Forbes Street, Lakeport, CA 95453

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

Which Lake County filing windows are coming up?

Lake County filing windows
ClosesAreaWho hears itStatus
Nov 30, 2026CountywideLake County appeals board (Clerk of the Board of Supervisors) · Official source · Last checked Sep 29, 2026Open now

When were past Lake County deadlines?

Past Lake County filing windows
Tax yearWindowOffice
2025Closed December 1, 2025Lake County appeals board (Clerk of the Board of Supervisors)
2024Closed December 2, 2024Lake County appeals board (Clerk of the Board of Supervisors)
2023Closed November 30, 2023Lake County appeals board (Clerk of the Board of Supervisors)

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

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

Deadline detailLake County appeals board (Clerk of the Board of Supervisors) · Filing period
In Lake County the regular assessment appeal filing period runs from July 2 through November 30.[1]
Deadline detailLake County appeals board (Clerk of the Board of Supervisors) · Late returned
Lake County returns appeals submitted outside the July 2 - November 30 period (or the 60-day supplemental window).[2]

Who decides a property tax appeal in Lake County?

The Lake County appeals board (Clerk of the Board of Supervisors)'s decision is final and not reheard; the owner or the Lake County Assessor may seek review in superior court. Lake County appeals board (Clerk of the Board of Supervisors): In Lake County, appeals not settled with the Assessor-Recorder go before the Board of Supervisors sitting as the Lake County Local Board of Equalization.

Appeal stepsLake County appeals board (Clerk of the Board of Supervisors)
The Lake County appeals board (Clerk of the Board of Supervisors)'s decision is final and not reheard; the owner or the Lake County Assessor may seek review in superior court.[3]
What the appeal is calledLake County appeals board (Clerk of the Board of Supervisors)
In Lake County, appeals not settled with the Assessor-Recorder go before the Board of Supervisors sitting as the Lake County Local Board of Equalization.[2]

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

Lake County appeals board (Clerk of the Board of Supervisors): In Lake County you return the paper Assessment Appeal Application with the fee to the Clerk of the Board, 255 N. Forbes Street, Lakeport. Lake County appeals board (Clerk of the Board of Supervisors): Lake County posts an Assessment Appeal Application and an Agent Authorization Form.

How to fileLake County appeals board (Clerk of the Board of Supervisors)
In Lake County you return the paper Assessment Appeal Application with the fee to the Clerk of the Board, 255 N. Forbes Street, Lakeport.[3]
FormsLake County appeals board (Clerk of the Board of Supervisors)
Lake County posts an Assessment Appeal Application and an Agent Authorization Form.[2]
Filing feeLake County appeals board (Clerk of the Board of Supervisors)
Lake County charges a non-refundable processing fee per application for homes up to three units ( for other property), paid by check or money order with the application.[2]
Who may fileLake County appeals board (Clerk of the Board of Supervisors)
On the Lake 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.[3]
Informal reviewLake County appeals board (Clerk of the Board of Supervisors)
In Lake County you can ask the Assessor-Recorder for an informal decline-in-value reassessment from April 1 to November 30 using the Request for Reassessment Due to Decline in Market Value.[4]
HearingsLake County appeals board (Clerk of the Board of Supervisors)
In Lake County the applicant or appointed agent must appear in person at the hearing or the application is denied, unless a stipulation has been signed.[2]

Upcoming appeal deadlines in every county we track

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

What evidence can I use in Lake County?

Lake County appeals board (Clerk of the Board of Supervisors): Lake County's instructions ask for comparable sales, cost and income data, where relevant, to support the owner's opinion of value. Lake County appeals board (Clerk of the Board of Supervisors) · Exchange: Before a Lake 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 acceptedLake County appeals board (Clerk of the Board of Supervisors)
Lake County's instructions ask for comparable sales, cost and income data, where relevant, to support the owner's opinion of value.[3]
Evidence ruleLake County appeals board (Clerk of the Board of Supervisors) · Exchange
Before a Lake 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.[3]
Evidence ruleLake County appeals board (Clerk of the Board of Supervisors) · Sale dates
Lake County notes that comparable sales after March 31 cannot be used for that year's January 1 value; the best support is non-distressed sales from the prior January 1 through March 31.[4]

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

Lake County appeals board (Clerk of the Board of Supervisors): Lake County warns that its Board of Equalization must find full cash value from the hearing evidence, and if that exceeds the assessment, the assessment will be raised.

Can the value go up?Lake County appeals board (Clerk of the Board of Supervisors)
Lake County warns that its Board of Equalization must find full cash value from the hearing evidence, and if that exceeds the assessment, the assessment will be raised.[2]

Which exemptions can lower my bill without an appeal?

Lake County's Assessor-Recorder grants 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
Lake County's Assessor-Recorder grants 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 Lake 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 Lake County property taxes?

Tax rate used: 1.115% of assessed value (county average, fiscal 2024-25).

How much could a lower assessment save on Lake County property taxes?
ExampleTax saved
$10,000 less assessed value$112 a year
10% less on a home assessed at $6,945 (the county's 25th percentile)$8 a year
10% less on a home assessed at $59,826 (the county's median)$67 a year
10% less on a home assessed at $223,100 (the county's 75th percentile)$249 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 Lake County pay in property tax?

The median owner-occupied home in Lake County was worth $324,300, and the median property tax its owners paid was $2,369 a year, according to the Census Bureau's American Community Survey.

Median home value
$324,300
Margin of error ±$13,839.
Median property tax paid per year
$2,369
Margin of error ±$131.
Median tax as a share of median value
0.73%
A ratio of two medians, not a tax rate. Your own bill depends on your assessment and local levies.
Owner-occupied homes
19,441
Margin of error ±830.

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.

From the county's assessment and appeal records

Homes in the county's assessment records
60,668
Median assessed value
$59,826
Middle half of assessed values
$6,945 to $223,100

Source: The county's open assessment data, aggregated by us (tax year 2025 final values). Our calculation from public records; not an opinion of any home's value.

How Lake County home assessments are spread

Assessed values of 60,668 homes in the property classes our free check covers (unknown), tax year 2025 final values. Half are between $6,945 and $223,100; the median is $59,826. The last bar holds everything above it.Source: Assessment records from the county's open data (tax year 2025 final values), retrieved Sep 27, 2026; our calculation.

Median home value: Lake County compared

  1. Lake County$324,300
  2. Typical California county$481,100
  3. Typical US county$185,300

Typical California county $481,100; Lake County $324,300; 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: Lake County compared

  1. Lake County$2,369
  2. Typical California county$3,294
  3. Typical US county$1,619

Typical California county $3,294 a year; Lake County $2,369 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.

Median home assessment by map book

  1. Map book 144$387,001
  2. Map book 440$320,793
  3. Map book 082$319,017
  4. Map book 005$306,635
  5. Map book 015$284,344
  6. Map book 141$282,157
  7. Map book 044$281,381
  8. Map book 026$250,472
  9. Map book 063$22,148
  10. Map book 041$20,483
  11. Map book 038$11,700
  12. Map book 042$5,784
  13. Map book 034$2,228
  14. Map book 030$1,814
  15. Map book 109$1,353
  16. Map book 033$1,281

The 8 highest and 8 lowest of 64.

Median assessed value by map book: highest Map book 144 ($387,001), lowest Map book 033 ($1,281).

Median assessed value of homes in the property classes our free check covers (unknown) for each map book with at least 50 such homes, tax year 2025 final values.Source: Assessment records from the county's open data (tax year 2025 final values), retrieved Sep 27, 2026; our calculation.

Lake County filing windows on a calendar

  1. Lake County appeals board (Clerk of the Board of Supervisors)Nov 30, 2026 · Open now

The dashed line marks today.

Lake County appeals board (Clerk of the Board of Supervisors): 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 Lake County?

Lake County's application instructions explain that the base year is the year the property changed ownership or new construction was completed. Lake County reassessments are based on the property's value as of the January 1 lien date of the tax year requested.

Reassessment cycle
Lake County's application instructions explain that the base year is the year the property changed ownership or new construction was completed.[3]
Valuation date
Lake County reassessments are based on the property's value as of the January 1 lien date of the tax year requested.[4]
Level of assessmentDecline in value
On the Lake County application, a Decline in Value appeal means the home's January 1 market value is below its assessed value, and it covers only the year appealed.[3]

Homes in Lake 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
1980
All housing units, owned and rented
Single-family houses, detached or attached
73%
of 34,400 housing units
Owned homes with a mortgage or similar loan
53%
of 19,441 owner-occupied homes

Home values reported by owners

  1. Less than $50,0007%
  2. $50,000 to $99,9996%
  3. $100,000 to $199,99911%
  4. $200,000 to $299,99922%
  5. $300,000 to $399,99920%
  6. $400,000 to $499,99914%
  7. $500,000 to $749,99914%
  8. $750,000 to $999,9993%
  9. $1,000,000 to $1,999,9993%
  10. $2,000,000 or more<1%

Home values reported by owners in Lake County: Less than $50,000 7%; $50,000 to $99,999 6%; $100,000 to $199,999 11%; $200,000 to $299,999 22%; $300,000 to $399,999 20%; $400,000 to $499,999 14%; $500,000 to $749,999 14%; $750,000 to $999,999 3%; $1,000,000 to $1,999,999 3%; $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 $80014%
  3. $800 to $1,49915%
  4. $1,500 to $1,99912%
  5. $2,000 to $2,99920%
  6. $3,000 or more35%

Property taxes owners pay a year in Lake County: No real estate taxes 6%; Less than $800 14%; $800 to $1,499 15%; $1,500 to $1,999 12%; $2,000 to $2,999 20%; $3,000 or more 35%.

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 Lake County property tax appeals

When is the Lake County property tax appeal deadline?

The Lake County appeals board (Clerk of the Board of Supervisors) window closes November 30, 2026.[6][7]

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

Lake County charges a non-refundable processing fee per application for homes up to three units ( for other property), paid by check or money order with the application.[2]

Where do I file an assessment appeal in Lake County?

In Lake County you return the paper Assessment Appeal Application with the fee to the Clerk of the Board, 255 N. Forbes Street, Lakeport.[3]

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

Lake County warns that its Board of Equalization must find full cash value from the hearing evidence, and if that exceeds the assessment, the assessment will be raised.[2]

What other rules apply in Lake County?

Lake County appeals board (Clerk of the Board of Supervisors): Filing a Lake County appeal does not postpone the tax bill: taxes are still due by the dates on the bill.

Paying the tax while you appealLake County appeals board (Clerk of the Board of Supervisors)
Filing a Lake County appeal does not postpone the tax bill: taxes are still due by the dates on the bill.[3]

Which details are not confirmed yet?

We show a fact only after a person has checked it against the official source. These are still being checked. Until then, ask the Lake County appeals board (Clerk of the Board of Supervisors):

  • When a filing counts as on time

Property tax guides for Lake County homeowners

Counties next to Lake County

California property tax appeals: all counties

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Where do these facts come from?

  1. [1]Assessment Appeal | Lake County, CAOfficial guide or FAQ · last checked Sep 30, 2026
  2. [2]Assessment Appeal | Lake County, CA (Wayback capture)Official guide or FAQ · last checked Sep 29, 2026
  3. [3]Assessment Appeal Application (BOE-305-AH) with instructions (Lake County, PDF)Official notice, form, calendar or rules · last checked Sep 30, 2026
  4. [4]Reassessment | Lake County, CAOfficial guide or FAQ · last checked Sep 30, 2026
  5. [5]Claim for Homeowners' Property Tax Exemption (BOE-266), Lake County form for 2026 (PDF)Official notice, form, calendar or rules · last checked Sep 30, 2026
  6. [6]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
  7. [7]Publication 30: Residential Property Assessment Appeals (California State Board of Equalization, February 2020)Official guide or FAQ · last checked Sep 25, 2026
  8. [8]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
  9. [9]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
  10. [10]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
  11. 11.County open data: lakeca assessmentsRetrieved Sep 27, 2026; aggregated by us for the charts above.
  12. 12.County open data: lakeca assessmentsRetrieved Sep 27, 2026; aggregated by us for the charts above.
  13. 13.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25077: Median value (dollars), owner-occupied housing units — Lake County, California
  14. 14.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25103: Median real estate taxes paid, owner-occupied housing units — Lake County, California
  15. 15.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25003: Tenure (owner- and renter-occupied housing units) — Lake County, California

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

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

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