Skip to content
Free check
Free check

Independent. Not affiliated with any government agency.

California · County guide

San Diego County property tax appeal

A San Diego County property tax appeal for 2026 is filed with the San Diego County Assessment Appeals Board through its online portal, between July 2 and November 30, 2026. You can also ask the Assessor's Office for a free informal review if you think your market value is below your assessed value.

This season

Next deadline
Nov 30, 2026
Open now
San Diego 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 San Diego 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.

Excellent5.0 out of 5 · Based on reviewsRead reviews →

Reduced my assessment by $112,000!

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

Spencer CaldwellHomeowner

A $106,300 reduction

We had no idea there was this much room between our original assessment and the final number. Very happy with the outcome.

Megan HollisHomeowner
How to file
Online portal
Informal review
Free, from the Assessor's Office
Office address
1600 Pacific Highway, Room 402, San Diego, CA 92101 · 619-531-5777
Our coverage
Free check available
  • Independent guide — not affiliated with San Diego 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 San Diego County property tax appeal?

Who hears a San Diego County appeal?

One stage. We are not affiliated with this office.

Who hears it: San Diego County Assessment Appeals Board

Filing: appeal

Open now

Where is the San Diego County office?

San Diego County Assessment Appeals Board[2]

Address
1600 Pacific Highway, Room 402, San Diego, CA 92101

Assessor[10]

San Diego Assessor Main Office

Address
County Administration Center, 1600 Pacific Highway, Suite 103, San Diego, CA 92101
Hours
Monday-Friday 8:00 a.m.-5:00 p.m.

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

Which San Diego County filing windows are coming up?

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

When were past San Diego County deadlines?

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

How do I file a San Diego County appeal?

Filing season 2026
July 2 through November 30
How to file
Online portal
Filing fee
The Clerk of the Board's fee schedule lists no application filing fee; written findings of fact cost $413

Can the San Diego County Assessor review my value first?

Yes. If you think your market value is below your assessed value, you can ask the Assessor's Office for a free informal review, in addition to the appeal.

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

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

When a filing counts as on timeSan Diego County Assessment Appeals Board
For San Diego County mailed appeals, the USPS postmark (or the private carrier's scan date) sets the filing date; a home or office postage meter date does not count.[1]
Deadline detailSan Diego County Assessment Appeals Board · Filing period
San Diego County's 2026 regular filing season runs July 2 through November 30.[2]
Deadline detailSan Diego County Assessment Appeals Board · Invalid application
If a San Diego County application is incomplete, the Clerk sends a letter with a deadline to fix it; if not fixed in time it is invalid, and the owner may ask for a validity hearing.[1]

Who decides a property tax appeal in San Diego County?

San Diego County Assessment Appeals Board: In San Diego County an owner who wants to take an adverse Assessment Appeals Board ruling to superior court usually needs Written Findings of Fact, requested before the hearing starts. San Diego County Assessment Appeals Board: In San Diego County you file an Assessment Appeals Application with the Clerk of the Board; the Assessment Appeals Board, independent of the Assessor, hears the dispute.

Appeal stepsSan Diego County Assessment Appeals Board
In San Diego County an owner who wants to take an adverse Assessment Appeals Board ruling to superior court usually needs Written Findings of Fact, requested before the hearing starts.[3]
What the appeal is calledSan Diego County Assessment Appeals Board
In San Diego County you file an Assessment Appeals Application with the Clerk of the Board; the Assessment Appeals Board, independent of the Assessor, hears the dispute.[2]

How do I file a property tax appeal in San Diego County?

San Diego County Assessment Appeals Board: San Diego County accepts appeal applications through its online portal. San Diego County Assessment Appeals Board · Mail: San Diego County paper appeals go to the Clerk of the Board of Supervisors, Assessment Appeals Services, 1600 Pacific Highway, Room 402, San Diego, CA 92101-2471; filings sent to other County offices are not valid.

How to fileSan Diego County Assessment Appeals Board
San Diego County accepts appeal applications through its online portal.[2]
How to fileSan Diego County Assessment Appeals Board · Mail
San Diego County paper appeals go to the Clerk of the Board of Supervisors, Assessment Appeals Services, 1600 Pacific Highway, Room 402, San Diego, CA 92101-2471; filings sent to other County offices are not valid.[1]
How to fileSan Diego County Assessment Appeals Board · Online portal
San Diego County appeals can be filed online through the Assessment Appeal portal, where you type your name as the signature and can upload documents.[1]
FormsSan Diego County Assessment Appeals Board
San Diego County's Clerk of the Board publishes the Authorization of Agent/Designation of Attorney form (BOE-305-AG) for naming an agent or attorney on an appeal.[4]
Filing feeSan Diego County Assessment Appeals Board
The San Diego Clerk of the Board fee schedule lists no application filing fee; written findings of fact cost $413.[5]
Who may fileSan Diego County Assessment Appeals Board
In San Diego County you may represent yourself, authorize someone who knows your case, or have an attorney or authorized agent appear; an agent needs the agent authorization form.[6]
Informal reviewSan Diego County Assessment Appeals Board
In San Diego County you can also ask the Assessor's Office for a free informal review if you think your market value is below your assessed value.[2]
HearingsSan Diego County Assessment Appeals Board
San Diego County hearings are informal but follow state rules, before a three-member board; notices go out at least 45 days ahead and each side gets one postponement (request 21 days ahead).[6]

Upcoming appeal deadlines in every county we track

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

Can the San Diego County appeals board raise my value?

Yes. Based on the evidence, the San Diego County Assessment Appeals Board, like every California appeals board, can raise, lower or keep an assessment.

What evidence can I use in San Diego County?

San Diego County Assessment Appeals Board: For most San Diego County homes, comparable sales near the January 1 lien date (and no later than 90 days after it) are the usual evidence; bring five sets. San Diego County Assessment Appeals Board · Exchange: Before a San Diego County hearing, the owner may request an exchange of information so both the owner and the Assessor see the other side's evidence.

Evidence acceptedSan Diego County Assessment Appeals Board
For most San Diego County homes, comparable sales near the January 1 lien date (and no later than 90 days after it) are the usual evidence; bring five sets.[6]
Evidence ruleSan Diego County Assessment Appeals Board · Exchange
Before a San Diego County hearing, the owner may request an exchange of information so both the owner and the Assessor see the other side's evidence.[7]
Evidence ruleSan Diego County Assessment Appeals Board · Sale dates
For a San Diego County hearing, comparable sales should be close to January 1 and no later than 90 days after it; bring about five sets of copies.[6]

Can my assessment go up if I appeal in San Diego County?

San Diego County Assessment Appeals Board: San Diego County's Assessment Appeals Board brochure says the board, with proper evidence, can lower or raise a property's assessed value.

Can the value go up?San Diego County Assessment Appeals Board
San Diego County's Assessment Appeals Board brochure says the board, with proper evidence, can lower or raise a property's assessed value.[3]

Which exemptions can lower my bill without an appeal?

San Diego County's Homeowners' Exemption saves about $70 a year ($7,000 off assessed value) on a primary residence; filing once is enough while the owner lives there.

Homeowner exemption
San Diego County's Homeowners' Exemption saves about $70 a year ($7,000 off assessed value) on a primary residence; filing once is enough while the owner lives there.[8]

What do San Diego 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 San Diego County property taxes?

Tax rate used: 1.171% of assessed value (county average, fiscal 2024-25).

How much could a lower assessment save on San Diego County property taxes?
ExampleTax saved
$10,000 less assessed value$117 a year
10% less on a home assessed at $854,700 (the Census median home value)$1,001 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 San Diego County pay in property tax?

The median owner-occupied home in San Diego County was worth $854,700, and the median property tax its owners paid was $5,774 a year, according to the Census Bureau's American Community Survey.

Median home value
$854,700
Margin of error ±$3,996.
Median property tax paid per year
$5,774
Margin of error ±$47.
Median tax as a share of median value
0.68%
A ratio of two medians, not a tax rate. Your own bill depends on your assessment and local levies.
Owner-occupied homes
639,138
Margin of error ±4,528.

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: San Diego County compared

  1. San Diego County$854,700
  2. Typical California county$481,100
  3. Typical US county$185,300

San Diego County $854,700; Typical California county $481,100; 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: San Diego County compared

  1. San Diego County$5,774
  2. Typical California county$3,294
  3. Typical US county$1,619

San Diego County $5,774 a year; Typical California county $3,294 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.

San Diego County filing windows on a calendar

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

The dashed line marks today.

San Diego 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 San Diego County?

In San Diego County the Assessor sets a base year value when a property is bought or new construction is completed; that value can be appealed in the regular period or within three years if the 60-day supplemental window was missed. A San Diego County decline-in-value (Prop 8) appeal is about the property's market value on January 1.

Reassessment cycle
In San Diego County the Assessor sets a base year value when a property is bought or new construction is completed; that value can be appealed in the regular period or within three years if the 60-day supplemental window was missed.[7]
Valuation date
A San Diego County decline-in-value (Prop 8) appeal is about the property's market value on January 1.[7]
Level of assessmentDecline in value
The San Diego County Assessor can temporarily reduce a property's assessed value under Proposition 8 when its market value falls below the current assessed value.[9]

Homes in San Diego 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
60%
of 1,250,641 housing units
Owned homes with a mortgage or similar loan
70%
of 639,138 owner-occupied homes

Home values reported by owners

  1. Less than $50,0002%
  2. $50,000 to $99,9992%
  3. $100,000 to $199,9992%
  4. $200,000 to $299,9992%
  5. $300,000 to $399,9993%
  6. $400,000 to $499,9996%
  7. $500,000 to $749,99923%
  8. $750,000 to $999,99927%
  9. $1,000,000 to $1,999,99926%
  10. $2,000,000 or more8%

Home values reported by owners in San Diego County: Less than $50,000 2%; $50,000 to $99,999 2%; $100,000 to $199,999 2%; $200,000 to $299,999 2%; $300,000 to $399,999 3%; $400,000 to $499,999 6%; $500,000 to $749,999 23%; $750,000 to $999,999 27%; $1,000,000 to $1,999,999 26%; $2,000,000 or more 8%.

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 taxes4%
  2. Less than $8004%
  3. $800 to $1,4995%
  4. $1,500 to $1,9994%
  5. $2,000 to $2,9999%
  6. $3,000 or more75%

Property taxes owners pay a year in San Diego County: No real estate taxes 4%; Less than $800 4%; $800 to $1,499 5%; $1,500 to $1,999 4%; $2,000 to $2,999 9%; $3,000 or more 75%.

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 San Diego County property tax appeals

When is the San Diego County property tax appeal deadline?

The San Diego County Assessment Appeals Board window closes November 30, 2026.[11][12]

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

The San Diego Clerk of the Board fee schedule lists no application filing fee; written findings of fact cost $413.[5]

Where do I file an assessment appeal in San Diego County?

San Diego County accepts appeal applications through its online portal.[2]

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

San Diego County's Assessment Appeals Board brochure says the board, with proper evidence, can lower or raise a property's assessed value.[3]

What other rules apply in San Diego County?

San Diego County Assessment Appeals Board: Filing a San Diego County appeal does not pause the tax bill: keep paying on time, and any refund after a reduction is processed automatically.

Paying the tax while you appealSan Diego County Assessment Appeals Board
Filing a San Diego County appeal does not pause the tax bill: keep paying on time, and any refund after a reduction is processed automatically.[7]

Property tax guides for San Diego County homeowners

Counties next to San Diego County

California property tax appeals: all counties

Check a San Diego County home free

Check my property

You decide and file yourself.

Where do these facts come from?

  1. [1]File and Manage Your Application | San Diego County Clerk of the BoardOfficial guide or FAQ · last checked Sep 29, 2026
  2. [2]Property Tax Assessment Appeals - San Diego County Clerk of the BoardOfficial guide or FAQ · last checked Sep 29, 2026
  3. [3]Appealing Your Property Assessment: County of San Diego Assessment Appeals Board (brochure, PDF)Official notice, form, calendar or rules · last checked Sep 30, 2026
  4. [4]Authorization of Agent/Designation of Attorney (BOE-305-AG), San Diego County Clerk of the Board (PDF)Official notice, form, calendar or rules · last checked Sep 30, 2026
  5. [5]Fee Schedule - San Diego County Clerk of the BoardOfficial notice, form, calendar or rules · last checked Sep 25, 2026
  6. [6]Prepare for your appeal hearing | San Diego County Clerk of the BoardOfficial guide or FAQ · last checked Sep 30, 2026
  7. [7]Understanding the Assessment Appeal Process | San Diego County Clerk of the BoardOfficial guide or FAQ · last checked Sep 30, 2026
  8. [8]Homeowners' Exemption | San Diego County Assessor/Recorder/County ClerkOfficial guide or FAQ · last checked Sep 30, 2026
  9. [9]Real Property Assessment | San Diego County Assessor/Recorder/County ClerkOfficial guide or FAQ · last checked Sep 30, 2026
  10. [10]Office Locations (San Diego County Assessor/Recorder/County Clerk)Official guide or FAQ · last checked Oct 1, 2026
  11. [11]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
  12. [12]Publication 30: Residential Property Assessment Appeals (California State Board of Equalization, February 2020)Official guide or FAQ · last checked Sep 25, 2026
  13. [13]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
  14. [14]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
  15. [15]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
  16. 16.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25077: Median value (dollars), owner-occupied housing units — San Diego County, California
  17. 17.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25103: Median real estate taxes paid, owner-occupied housing units — San Diego County, California
  18. 18.U.S. Census Bureau, ACS 2020–2024 5-year estimates, table B25003: Tenure (owner- and renter-occupied housing units) — San Diego County, California

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

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

Check my home free