San Diego Property Tax: Rates, Exemptions & Appeal (2026)

Assuming “San, California” means San Diego County: the 2026 regular assessment appeal window is July 2 through November 30, 2026. File the BOE-305-AH Assessment Appeal Application with the Clerk of the Board of Supervisors, Assessment Appeals, 1600 Pacific Highway, Room 402, San Diego, CA 92101-2471; San Diego says the original signed application is accepted only by mail or in person and there is no filing fee.

How assessments work in San

San Diego County’s 2026 values are based on the January 1, 2026 lien date. The Assessor/Recorder/County Clerk posted the 2026 secured assessment roll after the roll close; the online notice says it reflects records as of June 30, 2026 and is “information only,” not a tax bill.

For a typical owner-occupied home, the starting point is California’s Proposition 13 system. Your assessed value is usually your purchase price, adjusted upward by no more than 2% per year, unless there was a reassessable event such as a change in ownership or new construction. San Diego’s own 2026 notice explains the tax formula plainly: annual property tax is 1% of assessed value plus voter-approved bonds and other fees, and assessed-value increases are generally limited to 2% per year.

The appeal you are most likely filing in 2026 is a regular assessment / decline-in-value appeal: you are saying the home’s fair market value on January 1, 2026 was lower than the value the Assessor put on the roll. This is not the same as asking for a payment plan, protesting a tax rate, or asking the board to grant an exemption.

San Diego’s 2026 regular appeal deadline is later than many California counties because the county’s Assessment Appeals page says individuals and businesses may appeal between July 2, 2026 and November 30, 2026 for fiscal year 2025-2026. If you are appealing a supplemental assessment after a purchase or new construction, use the deadline on that notice instead; San Diego’s instructions say supplemental appeals are generally due within 60 days after the mailing date printed on the supplemental tax bill, or the postmark date, whichever is later.

Whether you should appeal

Appeal if you can support a lower value with evidence from around January 1, 2026. Good evidence is not “my tax bill is too high”; it is comparable sales, an appraisal, listing history, condition problems, or facts showing the Assessor used the wrong property characteristics.

Start with the Assessor first. San Diego’s filing guide specifically recommends contacting the Assessor because staff can explain the basis for the value and may correct an error without a formal appeal. For 2026, check the Assessor’s secured roll notice, then call the Assessor at (619) 236-3771 or the public assessment-review number listed by the Clerk guide, (858) 505-6262.

Do the math before filing. San Diego’s countywide ad valorem rate for 2025-26 includes the 1.00000% Proposition 13 full-value tax. Voter-approved school and community college bond rates vary by Tax Rate Area. For a concrete City of San Diego example, the 2025-26 tax-rate resolution lists San Diego Unified bond rates and San Diego Community College bond rates; adding those listed rates to the 1% countywide rate gives about 1.23914% before fixed charges, Mello-Roos, parcel taxes, and special assessments.

Worked example: suppose your 2026 assessed value is $950,000, but three comparable January 2026 sales support $900,000. A $50,000 reduction at an illustrative 1.23914% ad valorem rate saves about $619.57 for that tax year. If your parcel has fixed charges, those usually do not fall just because your assessed value falls; value appeals mainly reduce value-based ad valorem taxes.

I did not find an official San Diego homeowner appeal success rate or median reduction published on the county appeal pages. Do not rely on mailers promising a percentage reduction; San Diego’s board decides on evidence, and it can reduce, sustain, or increase an assessment.

Step-by-step how to file

1. Download the correct form. Use BOE-305-AH, Assessment Appeal Application from San Diego’s Clerk of the Board page: https://www.sdcounty.ca.gov/cob/aab/aabadobeapp.pdf. The form is required to formally dispute the assessed valuation. San Diego also provides sample applications and additional forms at https://www.sandiegocounty.gov/content/sdc/cob/aab/forms.html.

2. Complete one application per assessment/parcel. Put the Assessor’s parcel number, the value on the roll, and your opinion of value. Do not attach your whole hearing packet to the application unless the form or Clerk specifically asks for it; prepare evidence separately for the hearing.

3. Choose the correct assessment type. For a normal 2026 annual value appeal, check the regular assessment / decline-in-value category. For a purchase, new construction, escape assessment, calamity reassessment, or penalty assessment, follow the special deadline on your notice.

4. Decide whether the application should serve as a refund claim. San Diego’s guide explains that checking “yes” lets the county automatically process a refund if the board lowers the value, but it may shorten the timeline for later court action. If you are unsure or the dollars are large, get advice before checking the box.

5. File by mail or in person only. San Diego says the Assessment Appeal Application must have an original signature and “can only be received by mail or submitted in person.” Mail or deliver it to:

   Clerk of the Board of Supervisors
   Assessment Appeals
   1600 Pacific Highway, Room 402
   San Diego, CA 92101-2471

   Applications sent by U.S. mail are treated as filed based on the USPS postmark. If there is no USPS postmark, the filing date is the date the Clerk actually receives it. Do not email the initial application. San Diego allows additional forms—not the original appeal application—to be sent by fax to (619) 338-8159 or email to AssessmentAppeals@sdcounty.ca.gov.

6. Fee. There is no fee to file the San Diego Assessment Appeal Application. The current Clerk fee schedule separately lists a fee for optional Assessment Appeals Board written findings; check the schedule before requesting findings.

What happens after

The appeal authority is the County of San Diego Assessment Appeals Board, administered by the Clerk of the Board of Supervisors. The board is separate from the Assessor. San Diego describes the boards as quasi-judicial, three-member bodies appointed by the Board of Supervisors; board members have professional experience in fields such as real estate, appraisal, accounting, law, or similar areas.

After filing, San Diego says you should receive a postcard confirming receipt within about two weeks. The Clerk then schedules the hearing and gives at least 45 days’ notice. Before the hearing, either side may request an exchange of information more than 30 days before the hearing.

At the hearing, expect a simpler version of a court presentation. You or your authorized agent presents evidence; the Assessor presents evidence; the board weighs the valuation approaches and data. You do not need a lawyer, but you or your representative must know the facts. Failure to appear can result in denial. The board may announce a decision at the hearing or take the matter under submission and mail a written decision later.

A non-oral outcome is possible if you and the Assessor reach a written stipulation as to value before the hearing. San Diego’s rules allow the board, at a public hearing, to accept the stipulation and waive the applicant’s appearance, or reject it and set/reset the matter for hearing. You can also withdraw in writing.

San Diego rules require a hearing and final determination within two years of a timely application unless you and the board agree to extend. If the board misses that deadline, your stated opinion of value may be enrolled temporarily, subject to exceptions.

Local tips

Check exemptions before appealing. San Diego’s Homeowners’ Exemption is a free one-time filing for your principal residence; it shows as a $7,000 reduction on the tax bill and the Assessor describes it as about $70 in savings. You cannot receive both the Homeowners’ Exemption and the Disabled Veterans’ Exemption.

For qualifying 100% disabled veterans or eligible surviving spouses, San Diego’s Disabled Veterans’ Exemption can be much larger. The Assessor’s page says the basic exemption rolls over annually, the low-income version must be applied for annually, and applications can be submitted by email, mail, or in person to the Disabled Veterans’ Exemption Section.

Use the county tax-rate tools for your parcel. The worked example above uses a City of San Diego school-bond illustration, but your actual tax rate depends on your Tax Rate Area and your fixed charges. San Diego’s Auditor & Controller provides a Tax Rate by Tax Rate Area search and a fixed-charge special-assessment search; use those before estimating savings.

Finally, keep paying your tax bill while the appeal is pending. Filing an appeal does not suspend payment deadlines. If you win and made the application serve as a refund claim, the county can process the refund after the value reduction is final.

When Are Property Taxes Due in San Diego?

California secured-roll property taxes are paid in two installments: the first installment is due November 1 and must be paid by December 10 to avoid penalty; the second installment is due February 1 and must be paid by April 10 to avoid penalty. Two secured-roll installments: first installment due November 1/delinquent after December 10; second installment due February 1/delinquent after April 10.

This is not the same as the assessment appeal deadline above. The appeal deadline is your window to contest your assessed value; the payment due date is when the resulting tax bill must be paid. Missing one does not affect the other, but missing either has real consequences — one forfeits your right to appeal for the year, the other can trigger penalties and interest.

Source: https://taxes.ca.gov/other-taxes-and-fees/property-tax-function-important-dates/

Property Tax Exemptions in San Diego

• Homeowners' Exemption — Owner-occupied dwelling used as the owner's principal place of residence as of the January 1 lien date; rentals and vacation homes do not qualify.. $7,000 reduction of taxable value. Yes, one-time filing with the county assessor; remains in effect until title changes, the owner no longer occupies the dwelling as a principal residence on the lien date, or the property is otherwise ineligible. Apply by February 15 for a timely claim; December 10 is the late-claim deadline noted by the state calendar.. (Source: https://www.boe.ca.gov/proptaxes/pdf/pub29.pdf)
• Disabled Veterans' Exemption — Qualified disabled veterans with a 100% service-connected disability rating or compensation at the 100% rate due to unemployability, and certain unmarried surviving spouses, for the claimant's principal place of residence.. Basic exemption of $100,000 and low-income exemption of $150,000, adjusted annually for inflation. Yes. Basic exemption requires an initial claim and generally no annual refiling after granted; low-income exemption requires annual filing. Apply by Initial claim: within 90 days of the qualifying event or by the January 1 following the qualifying event, whichever is later. Low-income annual claim: January 1 through February 15 for 100% of the exemption; February 16 through December 10 for 90%; after December 10 for 85%.. (Source: https://www.boe.ca.gov/proptaxes/dv_exemption.htm)
• Veterans' Exemption — Qualified veterans, certain unmarried surviving spouses, or either parent of a deceased qualifying veteran who meet service requirements, lived in California on the January 1 lien date, and do not own property worth more than $5,000 if single or $10,000 if married.. Exemption of property value not to exceed $4,000. Yes, claim filed with the assessor. Apply by February 15 for a timely exemption claim; December 10 is the late-claim deadline noted by the state calendar.. (Source: https://boe.ca.gov/proptaxes/veterans_exemption.htm)
• Proposition 19 Base Year Value Transfer — Homeowners who are at least age 55, severely and permanently disabled, or victims of wildfire or natural disaster, when transferring the taxable value of an original primary residence to a replacement primary residence in California under the stated timing rules.. Allows transfer of the original home's taxable/base-year value to a replacement primary residence; if the replacement home exceeds the equal-or-lesser-value rule, the excess value is added to the transferred value. May be used up to three times. Yes, file the applicable BOE-19 form with the county assessor. Apply by Within 3 years of the date the replacement dwelling is purchased or new construction of the replacement dwelling is completed.. (Source: https://www.boe.ca.gov/prop19/)
• Property Tax Postponement Program — Homeowners who are at least 62 years old, blind, or disabled; own and occupy the property as a principal residence; and meet state income and other program requirements.. Defers current-year property taxes on the principal residence; postponed taxes must eventually be repaid and are secured by a lien against the property. Yes, re-apply each year in which postponement is desired. Apply by Applications may be submitted between October 1 and February 10 each year.. (Source: https://www.sco.ca.gov/ard_ptp_faq.html)