Property Tax

San Diego County property owners can use several county offices and online systems to review assessed values, locate current and prior property tax records, pay tax bills, request eligible exemptions, and challenge an assessment. This article explains the responsibilities of the Assessor and Treasurer-Tax Collector, the information needed for common searches, online payment restrictions, assessment appeal deadlines, and the county programs that may reduce taxable value or provide relief after qualifying events.

Property Tax Office Responsibilities

Property tax administration in San Diego County is divided among several offices. Knowing which office handles each part of the process can prevent delays and unnecessary referrals.

Assessor

The San Diego County Assessor determines the assessed value of taxable real property and certain other property. The Assessor maintains the secured assessment roll, processes qualifying exemption and relief applications, and reviews questions about assessed values.

The Assessor does not function as the online tax payment office. A property owner who has a question about why a value changed, whether an exemption appears on the assessment, or whether a property may qualify for reassessment relief should generally work with the Assessor.

The county’s property tax billing information page connects taxpayers with assessment-related information and services. It also distinguishes the Assessor’s role from the collection functions performed by the Treasurer-Tax Collector.

Treasurer-Tax Collector

The San Diego County Treasurer-Tax Collector maintains tax collection services and the WebPayments system. This office receives property tax payments and provides searches for secured, unsecured, and defaulted property tax records.

Questions involving a bill balance, payment transaction, payment receipt, or the records displayed in the payment system generally belong with the Treasurer-Tax Collector rather than the Assessor. The county also maintains a separate tax collection service page for matters related to collecting property taxes.

Assessment Appeals Board

The Assessment Appeals Board provides an independent review process for property owners who disagree with a taxable value. The board considers evidence from the taxpayer and the Assessor’s Office and establishes the taxable value for the property involved in the appeal.

An appeal concerns the assessed value, not simply dissatisfaction with the amount due. Taxes may include voter-approved bonds, fees, and other amounts in addition to the basic tax calculated from assessed value. A property owner should identify the specific assessment being challenged before filing.

Taxpayer Advocate

The Office of the Taxpayer Advocate is another county contact for property tax matters. The advocate works within the Assessor-Recorder-County Clerk organization and may assist taxpayers with assessment-related concerns and government processes. The county provides an official Taxpayer Advocate page with office information.

Property Tax Bill Searches

The official San Diego County property tax search and payment system allows users to search for secured, unsecured, and defaulted property records. JavaScript must be enabled in the browser for the application to operate.

Available Search Methods

The system provides three main search options. Select the option that matches the number or information shown on the document available to you.

Option 1: Assessor Parcel Number, Supplemental Bill Number, or Escape Bill Number.
Option 2: Mailing address.
Option 3: Unsecured Bill Number.

An Assessor Parcel Number is associated with a parcel of real property. A Supplemental Bill Number identifies a supplemental assessment bill, while an Escape Bill Number relates to property that escaped assessment in an earlier period. An Unsecured Bill Number is used for an unsecured tax bill rather than a standard secured real property bill.

These identifiers are not interchangeable. Entering an unsecured bill number in the parcel-number field or using a supplemental bill number as a mailing-address search will not produce the intended result.

Choosing the Best Search

A bill number or parcel number is generally more specific than a mailing address. Address searches can be useful when a bill is unavailable, but the address must match the type of address maintained in the tax system. The WebPayments option is specifically described as a mailing-address search, which may differ from a property’s physical street address.

Review the tax bill or assessment notice before beginning. Confirm that numbers have been copied accurately and that dashes, leading digits, or other identifying characters have not been omitted. Users should also determine whether they are searching for a regular secured bill, a supplemental bill, an escape bill, or an unsecured bill.

Additional Bills for One Property

The county warns that a property may have additional tax bills that do not appear when using a particular search criterion. A regular secured bill search, for example, may not display every supplemental, escape, unsecured, or defaulted obligation connected with the taxpayer or property.

Do not assume that a single displayed result represents every amount associated with the property. Review the record type and bill description, and perform another supported search when a separate bill number or assessment notice is available.

Online Payment Process

The WebPayments application uses a seven-step process: search, search results, shopping cart, payor information, payment information, verification, and receipt. Moving through each stage allows the taxpayer to identify the record, select the bill, enter payment details, confirm the transaction, and obtain a receipt.

Search Results and Shopping Cart

After a search, review the matching records before placing a bill in the shopping cart. Compare the parcel number, bill number, mailing information, tax type, and any other displayed details with the tax document being paid.

A similar address or related parcel can produce a record that appears relevant but belongs to a different bill. Selecting the wrong record may result in a payment being applied somewhere other than intended. The verification stage should be treated as the final opportunity to catch an incorrect selection.

Accepted Credit Cards

The Treasurer-Tax Collector accepts Visa, MasterCard, Discover, and American Express credit cards through the online system. A 2.19% convenience fee is required to process these cards.

The convenience fee is separate from the property tax amount. Before submitting payment, review the total displayed at the verification stage so that both the tax payment and processing charge are understood.

Other debit cards, dual-use cards, gift cards, and prepaid cards are not accepted through this card-processing option. A card that displays a major payment-network logo should not automatically be assumed eligible if it is categorized as a debit, dual-use, gift, or prepaid product.

Verification and Receipt

Before authorizing the payment, compare the displayed bill information with the original tax document. Verify the taxpayer information, payment amount, card details, and processing fee. Correct any error before completing the transaction.

After submission, retain the receipt generated by the system. The receipt provides a record of the transaction and can be useful if a payment question arises. Avoid closing the browser or starting a new session until the payment result and receipt have been displayed.

Communications made through the county website do not constitute legal or official notice to the County of San Diego when federal, state, or local law requires formal notice. A payment-system message or online contact submission should not be treated as a substitute for a legally required filing or notice procedure.

Assessment Records and Tax Bills

An assessment record and a property tax bill serve different purposes. The Assessor’s secured assessment roll displays assessed-value information, while the Treasurer-Tax Collector’s system displays records used for tax collection and payment.

Secured Assessment Roll Searches

The county’s prior-year tax records and secured assessment roll page provides search functions for assessed-value information. The referenced 2026 roll reflects locally assessed real property, secured fixtures, and business personal property assessed as of January 1, 2026.

Assessment searches can be completed by parcel number, address, or street name.

Parcel number: Enter at least eight digits and use separating dashes, following the format shown by the county.

Address: Enter the street number and street name. Street direction, street type, and city name are not required.

Street name: Enter only the street name. This option is intended for parcels that do not have street numbers.

A parcel-number search must use the expected format. Missing digits or dashes may prevent the record from being located. For an address search, adding unnecessary city names, street suffixes, or directional terms may make the entry less consistent with the county’s instructions.

Assessment Notices Are Not Bills

The Notification of Assessed Value is informational and is not a property tax bill. It reports the assessed value in the Assessor’s records for the applicable lien date. It does not replace the bill issued for payment through the tax collection process.

A taxpayer should not attempt to pay from an assessed-value notice unless the notice also contains a valid tax bill number and payment instructions. Use the Treasurer-Tax Collector’s system for bill searches and payments.

Online Ownership Restrictions

Property ownership information cannot be provided on the internet through the assessment-roll search because of the California Government Code restriction identified by the county. A user searching an address or parcel should not expect the online assessment result to identify the owner.

The county also states that the 2026 assessed-value information was accurate as of June 30, 2026. Later changes may occur without being reflected on that page. Users should verify that the assessment information is current before making decisions based on it.

How Assessed Values Change

Under the county’s explanation of California property tax rules, real property is reassessed when there is a change in ownership or new construction. An assessed value may also be temporarily reduced when the current market value falls below the adjusted base-year value.

If none of those events has occurred, an inflation adjustment based on the California Consumer Price Index is required. Proposition 13 generally limits the annual property tax to 1% of assessed value, plus voter-approved bonds and other fees. It also limits annual increases in assessed value to 2% under the conditions described by the county.

The factored base-year value represents the Proposition 13 limit. On the 2026 assessed-value notice, that figure is shown when an assessment has been temporarily reduced under Proposition 8.

A tax bill can increase even when the owner believes the market value has not changed significantly. Possible reasons supported by the county material include a change in ownership, new construction, an inflation adjustment, restoration of a value after a temporary reduction, a supplemental assessment, or charges beyond the basic 1% amount.

Different Property Tax Records

Secured Property Taxes

Secured property tax records are generally associated with real property and are secured by that property. The Assessor Parcel Number is a primary identifier for these records. A secured assessment-roll record may help confirm assessed value, but the tax collection record should be used to identify the bill and payment amount.

Supplemental Tax Bills

A supplemental tax bill is separate from the regular annual bill. The WebPayments system allows a taxpayer to search by Supplemental Bill Number. Because supplemental bills may not appear under every search criterion, use the specific number printed on the supplemental document whenever possible.

A supplemental assessment appeal has a different filing deadline from a regular assessment appeal. The appeal must be filed within 60 days from the mailing date shown on the supplemental tax bill.

Escape Tax Bills

An Escape Bill Number can also be entered through the first WebPayments search option. An escape assessment concerns property or value that escaped assessment previously. It should not be confused with the regular secured bill or a supplemental bill.

Unsecured Property Taxes

Unsecured bills use an Unsecured Bill Number and have their own search option. Do not enter this number into the parcel-number field. Use the dedicated unsecured-bill search to locate matching records.

Defaulted Properties

The WebPayments page also supports searches involving defaulted properties. Confirm that the displayed record is the intended defaulted tax record and review all available identifying information before entering payment details.

Property Tax Savings Programs

The Assessor maintains several programs that may reduce assessed value or provide property tax relief for qualifying owners. The county’s property tax savings programs page organizes available programs for real estate, aircraft, and vessels.

Homeowners’ Exemption

The Homeowners’ Exemption provides a savings of $70 when the owner files the required form and declares that the property is the owner’s primary residence.

The filing is made once and remains valid for as long as the owner continues to occupy the property as a primary residence. A taxpayer already receiving the exemption can identify it in the upper-right portion of the property tax bill under “Exemptions.” The bill shows a $7,000 reduction labeled “Homeowners’.”

Disabled Veterans’ Exemption

The Disabled Veterans’ Exemption may be available to a United States military veteran with a 100% Department of Veterans Affairs disability rating or an unemployability rating resulting from a service-connected injury. An unmarried surviving spouse may also qualify.

The property must be the primary residence. The county describes the application as a one-time filing while the residence continues to qualify. The filing process requires the applicant’s VA rating letter and DD-214. When the exemption is already applied, the property tax bill displays a reduction for “Other” in the exemptions section.

Relief for Older Homeowners

Under Proposition 19, homeowners age 55 or older may be able to transfer their Proposition 13 assessed value from a current primary residence to a replacement primary residence when the applicable conditions are met. The county provides a property tax relief page for older homeowners with application information.

This benefit concerns the transfer of assessed value. It is different from the Homeowners’ Exemption and should not be treated as an automatic reduction available solely because an owner has reached age 55.

Disaster and Calamity Relief

An owner of a home, business, boat, or plane damaged or destroyed by a disaster such as a fire, earthquake, or flood may qualify for reassessment relief. The damage must exceed $10,000, and the application must be filed within 12 months from the date the damage occurred.

The official disaster and calamity property tax relief page provides the reassessment application and related county information. Owners should preserve records that identify the property, date of damage, nature of the event, and extent of the loss for use in the application process.

Assessment Appeal Procedures

Property owners who disagree with a taxable value have the right to request an independent review. The county’s assessment appeals information explains filing periods, hearing requirements, evidence, and payment responsibilities.

Regular Assessment Deadline

A regular assessment appeal must be filed between July 2 and November 30. For the 2026 regular assessment, the county states that applications are accepted from July 2 through November 30, 2026.

Contacting the Assessor to discuss the value does not replace filing an appeal within the required period. A taxpayer who intends to preserve appeal rights should pay attention to the filing deadline while communicating with the Assessor.

Supplemental Appeal Deadline

An appeal involving a supplemental assessment must be filed within 60 days from the mailing date on the supplemental tax bill. The mailing date is therefore a critical document detail. Retain the bill and envelope or other mailing evidence associated with the notice.

Evidence for the Hearing

A taxpayer should present information supporting the claimed market value. The county identifies sales information for comparable properties as an example. For regular-roll or supplemental-roll valuation, the Assessment Appeals Board will not consider a sale that occurred more than 90 days after the date for which the value is being estimated.

Evidence should relate to the correct property and valuation date. A recent sale from a different market period or a property with substantially different characteristics may not support the requested value as clearly as a closely comparable sale.

Appearance Requirements

Many cases are resolved when the property owner and Assessor’s Office agree on a value and sign a written stipulation. When that occurs, an appearance is not required.

If no agreement is reached, the property owner or an authorized agent must appear at the hearing. The county states that the case will be denied if the required person does not appear.

Taxes During an Appeal

Filing an assessment appeal does not replace the need to address property tax installment deadlines. The county advises taxpayers to pay the December 10 installment because the appeal may not be completed before that deadline.

A corrected bill may be issued before the April 10 installment when the assessment changes in time. If both installments are paid before a corrected bill is received, the county states that an overpayment will be refunded.

Common Property Tax Mistakes

Paying the Wrong Record

A parcel may have regular, supplemental, escape, unsecured, or defaulted records. Confirm the bill type and identifying number before adding a record to the payment cart.

Assuming One Search Shows All Bills

The county expressly warns that additional bills may not appear under the selected search criterion. Search using each separate bill number available to you rather than relying only on an address or parcel search.

Confusing Value With Amount Due

An assessment notice reports value and is not a tax bill. The amount due must be obtained from the tax collection record. Do not submit a payment based only on an assessed-value notice.

Using an Unsupported Card

Debit cards, dual-use cards, gift cards, and prepaid cards are not accepted through the online credit-card option described by the county. Confirm the card type before entering payment information.

Overlooking the Convenience Fee

The 2.19% convenience fee increases the total card transaction. Review the full amount during verification rather than considering only the tax balance.

Waiting Past an Appeal Deadline

Regular and supplemental appeals use different deadlines. A regular appeal must be filed during the July 2 through November 30 period, while a supplemental appeal must be filed within 60 days of the bill’s mailing date.

Skipping Tax Payments During Appeal

An unresolved appeal may extend beyond an installment deadline. Follow the county’s direction regarding payment while the case is pending so that the appeal process is not mistaken for a payment suspension.

Property Tax Departments

County of San Diego Treasurer-Tax Collector
San Diego County Administration Center, 1600 Pacific Highway, Room 162, San Diego, CA 92101
877-829-4732; 855-829-3773

Office of the Assessor
San Diego County Administration Center, 1600 Pacific Highway, Room 103, San Diego, CA 92101
619-236-3771

Clerk of the Assessment Appeals Board
1600 Pacific Highway, Room 402, San Diego, CA 92101
619-531-5777

Office of the Taxpayer Advocate
1600 Pacific Highway, Suite 109, San Diego, CA 92101
619-541-1134

Property Tax FAQs

Is e-check the same as online banking?

No. An e-check is submitted directly through the county’s official property tax payment system. It is free, and the payment is credited on the date of successful submission. Online banking is initiated through your bank, which may mail a paper check to the county. That check can take more than five to ten business days to arrive and is not credited until received. Schedule online banking payments well before the delinquency date.

What happens when an e-check is returned?

If the bank returns an e-check unpaid, the county cancels the payment record and charges a $25 returned-check fee. When the return occurs after the delinquency deadline, late penalties may also apply. A confirmation screen alone does not guarantee that funds will clear, so review the bank account and routing numbers carefully and make sure sufficient funds remain available.

Why does a prior-year search show no record?

The prior-year property tax records search shows summaries of paid secured taxes as recorded when the roll closed on June 30. “Record not found” may mean neither installment was fully paid by that date, the account became delinquent or defaulted, or a refund affected the record. The page excludes unsecured and defaulted taxes and does not include later adjustments.

How should new homeowners verify who paid?

Review the closing statement and title documents to determine whether property taxes were credited or debited during escrow. Taxes are commonly prorated between buyer and seller according to the number of days each owned the property during the July 1 through June 30 fiscal year. That proration is an agreement between the parties; it does not change the installment amount shown on the county bill. Buyers should also check for unpaid prior-year taxes and identify which upcoming installment they must pay.