Assessor
The San Diego County Assessor identifies taxable property, establishes assessed values, maintains parcel records, and administers assessment-related programs throughout the county. This article explains how to search the secured assessment roll, review an assessed value, obtain property information, request record changes, locate the correct office, prepare for an assessment inquiry, and avoid confusing assessment records with property tax bills or recorded title documents.
Role of the Assessor
The Assessor is part of the San Diego County Assessor, Recorder and County Clerk agency. Although these functions are combined within one county agency, each division has a different responsibility. The Assessor determines taxable property values and maintains assessment records. The Recorder and County Clerk handle other public records and document services.
Under the California Constitution, the Assessor must locate, identify, and establish values for taxable property within San Diego County. The property under the Assessor’s authority includes vacant land, improved real estate, business property, certain manufactured homes, boats, and aircraft.
The Assessor also maintains records for taxable properties and maps showing real property parcels. These records support the county assessment roll and help identify the property connected with a particular parcel number, assessment, exemption, or ownership change.
The Office of the Assessor service page provides access to programs involving real estate, manufactured homes, business personal property, aircraft, vessels, exemptions, ownership changes, mapping, and property tax savings.
Assessment Versus Tax Billing
An assessed value is not the same as a property tax bill. The Assessor establishes the taxable value that becomes part of the assessment roll. The assessed value may then be used within the county property tax system to calculate taxes, voter-approved obligations, and other applicable charges.
A Notification of Assessed Value is informational. It does not request payment and should not be treated as a tax bill. Questions about the value, property characteristics, exemption amount, or reason for reassessment generally belong with the Assessor. Questions about an actual bill or payment belong within the property tax billing process.
Assessment Records and Recorded Documents
Assessment information should also be distinguished from recorded title documents. Assessor records help identify and value taxable property, but a parcel search is not a substitute for obtaining a recorded deed or certified document.
This distinction matters when a person needs evidence of ownership, a legal property description from a recorded instrument, or a certified copy. The Assessor may maintain ownership-related information for assessment purposes, but different services apply to recorded documents and official copies.
Secured Assessment Roll Search
The county’s Secured Assessment Roll Search allows users to review assessed values for locally assessed real property, secured fixtures, and secured business personal property. The 2026 search reflects property assessed as of January 1, 2026, which is the lien date for that assessment year.
The online information was accurate according to the Assessor’s records as of June 30, 2026. Assessed values or exemption amounts may change after that date. Later changes may not appear in the online notice, so users should verify information before relying on it for a transaction, appeal, budget, or other decision.
California Government Code section 6254.21 prevents property ownership information from being provided through this internet search. A search may return assessment and parcel information without displaying the owner’s name. The absence of an owner’s name does not mean that the parcel lacks an owner or that the assessment record is incomplete.
Parcel Number Searches
A parcel number is usually the most precise way to search the secured assessment roll. The search requires at least eight digits and separating dashes. The county provides formats such as 123-456-78 or 123-456-78-90.
Users should enter the parcel number as it appears on an assessment notice or other county record. Removing the dashes, entering too few digits, adding spaces, or using a tax bill number instead of the Assessor Parcel Number may prevent a result from appearing.
Before submitting the search, review each number group. A single incorrect digit can lead to a different parcel or a “no property found” response. When a parcel has more than eight digits, entering the full parcel number helps narrow the result.
Property Address Searches
An address search requires the street number and street name. Street directions, street types, and city names are not required. For example, a user generally does not need to include terms such as North, South, East, West, Drive, Street, Avenue, or the city name.
Leaving out unnecessary address elements can help when an exact postal format does not match the assessment database. Users should begin with the street number and core street name rather than copying a long mailing address into the search field.
Unit numbers and mailing details may not identify a separately assessed parcel. Condominiums, commercial properties, and multi-unit developments may have parcel structures that do not correspond directly to the way an address appears on mail. In those situations, a parcel number can provide a more reliable search.
Street Name Searches
The street-name option is intended for parcels that do not have street numbers. Enter the street name only. Adding a city, street direction, or street type may make the search less effective.
This option can be useful for vacant land or another parcel without a conventional numbered address. Because one street may contain many parcels, users should compare the returned parcel information with the records they already have before treating a result as the correct property.
Why Searches May Fail
A secured assessment search may fail because the wrong search method was selected, the parcel number format was incomplete, or the address contained unnecessary information. Common problems include:
Entering fewer than eight parcel-number digits.
Omitting the required dashes from the parcel number.
Using a property tax bill number instead of an Assessor Parcel Number.
Including a full mailing address when only the street number and name are needed.
Using an address search for land that does not have a street number.
Expecting the online system to display property ownership information.
Assuming the online value reflects a change made after June 30, 2026.
If the online search still does not identify the expected record, the Assessor’s Public Information Section can assist with property assessment questions.
Reading an Assessed Value
The 2026 Notification of Assessed Value shows the assessed value as of January 1, 2026. The notice may include land value, improvement value, personal property, fixtures, exemptions, and a total assessed value, depending on the property and assessment involved.
The notification may also identify the reason for a value change. A change does not necessarily mean that the Assessor increased the value based only on current market activity. Different assessment rules apply to changes in ownership, new construction, inflation adjustments, and temporary reductions.
Proposition 13 Limits
Proposition 13 limits the general annual property tax rate to 1% of assessed value, plus voter-approved bonds and other applicable fees. It also generally limits annual increases in assessed value to 2% when no event requiring reassessment has occurred.
The Proposition 13 framework creates a factored base year value. That value begins with an established base year and may receive permitted inflation adjustments. A property’s assessed value may therefore differ from its current sale price or a neighboring property’s assessed value.
The Factored Base Year Value is shown on the 2026 notice when an assessment has been temporarily reduced under Proposition 8. It represents the Proposition 13 limit that remains relevant while the property is receiving a temporary market-value reduction.
Changes in Ownership
California law generally requires real property to be reassessed when a change in ownership occurs. The reassessment process may establish a new taxable value based on the qualifying ownership event.
Not every transfer is handled identically. Some transactions may involve an exclusion application or another form connected with the ownership change. The Assessor provides forms for parent-child exclusions, grandparent-grandchild exclusions, senior exclusions, disabled exclusions, preliminary changes of ownership, and changes following the death of a real property owner.
Users should not assume that recording a deed automatically completes every assessment-related requirement. When an exclusion or other assessment treatment is being requested, the applicable Assessor form and supporting information must also be considered.
New Construction
New construction can result in reassessment. The Assessor’s real property assessment information covers new construction reassessments, supplemental assessments, manufactured homes, possessory interests, restricted properties, and change-in-ownership reassessments.
A reassessment related to construction may involve the newly constructed portion of a property rather than every element of the existing property. The applicable value and assessment treatment depend on the property record and the construction event documented by the Assessor.
Temporary Market Reductions
A temporary reduction may occur when a property’s current market value falls below its factored base year value. This treatment is associated with Proposition 8 and does not permanently replace the Proposition 13 base year value.
The county’s Assessor forms include a Review of Assessment form for Proposition 8. The stated filing period is December 1 through April 30. This review process is separate from filing a formal assessment appeal with the Assessment Appeals Board.
Property owners should compare the relevant assessment date with evidence of market value. For the 2026 regular assessment, the online notice refers to the property’s market value as of January 1, 2026.
Property Records and Maps
The Assessor provides a public information service for taxpayers who have questions about their property. Available information can include parcel maps and other assessment-related property records. The property information service page also identifies public information, building record requests, parcel maps, permits, and zoning as related property-information topics.
These records serve different purposes. An Assessor parcel map identifies assessed parcels and supports the preparation of the assessment roll. A building record request concerns available Assessor building information. Permit and zoning questions may involve records maintained outside the Assessor’s direct valuation functions.
Assessor Parcel Maps
Parcel maps are used to locate and identify real property for assessment purposes. The Assessor must identify every taxable parcel before property can be appraised and entered on the assessment roll.
The Mapping Services information explains that property may be described through metes and bounds or by reference to maps. Assessor maps generally show parcels in relation to streets, highways, official survey points, and district boundaries.
An Assessor parcel map is designed for assessment administration. Users should not treat it as a replacement for a survey, recorded subdivision map, deed, or other document needed for a legal boundary determination.
Building and Property Characteristics
Assessor records may include property characteristics used in the assessment process. When reviewing these details, users should compare the record with the property as it existed on the relevant assessment date.
A perceived error in square footage, improvement description, parcel configuration, or another characteristic should be raised with the Assessor. Supporting records can help the office identify the property and evaluate the concern.
Useful Information to Prepare
Before contacting the Assessor about a property record, prepare the information that directly identifies the parcel and the issue:
The complete Assessor Parcel Number with dashes.
The property’s street number and street name.
The assessment year involved.
The Notification of Assessed Value, when available.
The specific value, exemption, or property characteristic in question.
Documents or comparable sales supporting a requested value review.
Copies of relevant ownership or construction records when the issue involves a reassessment event.
Providing a focused explanation is more useful than submitting a general statement that a value appears too high. Identify the part of the record being questioned and the evidence connected with the applicable valuation date.
Assessor Forms and Requests
The county maintains forms for address changes, real property assessments, exemptions, ownership changes, parcel requests, business property, vessels, and aircraft. The Assessor forms collection should be reviewed before submitting a request because different property types and programs require different forms.
Mailing Address Changes
A property mailing address should be kept current so assessment notices and related correspondence reach the intended recipient. The county provides separate address-change options for residential or commercial real property, business personal property, vessels, and aircraft.
The official address change request page directs users to the applicable forms and instructions. A mailing address change affects where correspondence is sent; it does not by itself change legal ownership or establish a new title interest.
Users should select the form that matches the property category. Submitting a real property address-change form for a vessel, aircraft, or business personal property account may delay the update or require another submission.
Property Tax Savings Programs
The Assessor administers several assessment-related exemptions, exclusions, and relief programs. The property tax savings programs page organizes available information for real estate, aircraft, and vessels.
Forms identified in the Assessor’s collection include programs involving:
Homeowners’ property tax exemptions.
Basic and low-income disabled veterans’ exemptions.
Institutional and nonprofit exemptions.
Parent-child and grandparent-grandchild exclusions.
Senior and disabled change-in-ownership exclusions.
Property damaged by misfortune or calamity.
Transfers of base year value involving qualifying replacement property.
Specified construction exclusions, including certain accessibility, seismic safety, rainwater capture, and solar energy projects.
Each program has its own form and requirements. The existence of a form does not establish that a property or applicant qualifies. Users should select the form matching the event date and circumstances, especially when the county provides separate versions for transfers occurring before or after a stated date.
Business Property Forms
Business personal property is assessed separately from ordinary household belongings. The Assessor’s forms include depreciation schedules, business property statement instructions, agent authorization forms, and claims related to misfortune or calamity.
Form 571-L, the Business Property Statement, is available only upon request according to the county’s forms information. The Assessor directs users to request that form through the Business Property service.
Aircraft and vessel forms are also separate from real property forms. Available records address ownership reporting, sale or loss, permanent removal, historical aircraft exemptions, commercial fishing assessments, and mailing address changes.
Assessment Review and Appeals
Property owners who disagree with a taxable value may request assistance from the Assessor and may have the right to file a formal assessment appeal. These are related but distinct steps.
The 2026 assessed-value notice directs property owners to contact the Assessor when they believe the property’s market value on January 1, 2026, was lower than the assessed value. Speaking with the Assessor gives the office an opportunity to review the record and discuss the evidence before a formal hearing becomes necessary.
Formal Appeal Process
A formal assessment appeal is reviewed by an independent citizen board appointed by the Board of Supervisors. The board considers evidence from the taxpayer and the Assessor before establishing the taxable value for the property.
The assessment appeals information distinguishes regular assessments from supplemental assessments:
A regular assessment appeal must be filed between July 2 and November 30.
A supplemental assessment appeal must be filed within 60 days of the mailing date shown on the supplemental tax bill.
Assessment Appeal Applications for the 2026 regular assessment are accepted from July 2 through November 30, 2026.
The filing period should not be confused with the Proposition 8 Review of Assessment period. A review request submitted to the Assessor and a formal application filed with the Assessment Appeals Board are different procedures.
Evidence for an Appeal
Evidence should support the owner’s opinion of market value for the relevant valuation date. Comparable property sales are one type of evidence identified by the county.
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 value is being estimated. Selecting sales near the applicable date helps keep the evidence relevant to the assessment under review.
The Assessor maintains listings of recent sales at branch offices and at the main Assessor office. Users reviewing comparable sales should consider differences in location, property type, lot size, improvements, condition, and sale date rather than relying only on a nearby address or sale price.
Hearings and Stipulations
Many cases are resolved when the property owner and the Assessor agree on a value and sign a written stipulation. When a stipulation resolves the case, an appearance is not necessary.
If an agreement is not reached, the property owner or an authorized agent must appear at the hearing. Failure to appear can result in the case being denied. Anyone using an agent should confirm that the required authorization documentation has been completed.
Tax Payments During Appeals
Filing an assessment appeal does not suspend the obligation to pay the property tax bill. The county advises property owners to pay the December 10 installment because a high volume of appeals may prevent a case from being decided before that deadline.
If a corrected bill is issued before the April 10 installment, the revised amount may apply to that installment. If both installments have already been paid and the final correction results in an overpayment, the overpayment is refunded.
Users should not withhold a tax payment solely because an assessment review or appeal is pending. Assessment disputes and tax-payment deadlines operate through separate processes.
Office Visits and Service Locations
The county operates several Assessor service locations. The official office locations page identifies the San Diego Assessor Main Office, East County Office in Santee, Chula Vista Office, San Marcos Office, and Kearny Mesa Office.
Assessor services are available Monday through Friday from 8:00 a.m. to 5:00 p.m. at the listed Assessor locations. The Kearny Mesa office provides Assessor services, but Recorder and Clerk services are not available there at this time. Users needing both assessment and recorded-document services should select a location that provides the required divisions.
The San Diego Assessor Main Office is in the County Administration Center. Free underground parking is available for up to three hours while conducting county business during weekday business hours. The garage entrance is on Ash Street. Metered parking is also available around Waterfront Park.
Preparing for an Office Visit
An office visit is more productive when the property and request can be identified immediately. Bring the complete parcel number, the relevant notice or form, and documents connected with the question.
For an assessment-value discussion, organize comparable sales or other market evidence around the applicable valuation date. For an ownership change, bring the documents identifying the transfer and the exclusion form being requested. For a property-record issue, identify the exact parcel characteristic or map information that appears incorrect.
Do not rely only on a street address when a parcel number is available. A parcel number helps distinguish units, vacant land, adjacent parcels, and properties that share similar mailing addresses.
Assessor Fees
Some Assessor records and copies have established fees. The county fee schedule identifies the following charges:
Real estate document copies: $2 for the first document page and $0.05 for each additional page.
Certification: $1 per document.
Screen prints: $1 per page.
Assessor parcel maps up to and including 11 by 17 inches: $2 each, with $0.05 for each additional page.
Property characteristics: $1 per parcel.
Map copies larger than 11 by 17 inches: $13 for the first page and $0.50 for each additional page.
Assessor building records: no fee at this time.
Users should identify the exact record needed before ordering. A parcel map, property-characteristic record, building record, screen print, recorded document copy, and certified document are different products and may have different fees or issuing divisions.
Common Assessor Mistakes
Confusing Values With Bills
The Notification of Assessed Value is not a payment demand. It explains the taxable value in the Assessor’s records. A separate tax bill contains the payment amount and installment information.
Expecting Owner Names Online
The secured assessment search does not display property ownership information online because of California Government Code section 6254.21. Users should not interpret that restriction as evidence that no ownership record exists.
Using the Wrong Identifier
A tax bill number, recorded-document number, assessment appeal application number, and Assessor Parcel Number serve different purposes. The secured assessment search requires the parcel number or property-address information, not an appeal or tax-payment identifier.
Missing Filing Windows
A regular assessment appeal must be filed between July 2 and November 30. A supplemental appeal must be filed within 60 days of the supplemental tax bill’s mailing date. A Proposition 8 Review of Assessment uses the separate December 1 through April 30 filing period.
Using Current Value Evidence
An assessment dispute must be supported by evidence connected with the relevant valuation date. A later market change does not necessarily establish the property’s value on January 1 of the assessment year.
Assuming an Appeal Delays Payment
An appeal does not postpone property tax installment deadlines. Property owners should continue paying the bill while the assessment case is pending. Any resulting overpayment can be refunded after a correction.
Submitting the Wrong Form
Real property, business personal property, vessels, aircraft, exemptions, ownership changes, parcel changes, and mailing-address updates use different forms. The form title and property category should be reviewed before submission.
Assessor Offices and Contacts
San Diego Assessor Main Office
County Administration Center
1600 Pacific Highway, Suite 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
Assessor FAQs
Can I use an Assessor parcel map to confirm legal boundaries?
No. An Assessor parcel map helps identify land for assessment purposes and generally shows parcels in relation to streets, highways, survey points, and district boundaries. It is not a property survey and should not be relied on to settle a fence dispute, establish an easement, or determine the exact location of a legal boundary. For assessment-related research, review the county’s Mapping Services information. Boundary questions may require a recorded map, deed, or professional land survey.
How do I request a parcel combination or segregation?
The county provides separate forms for combining parcels and segregating a parcel for assessment purposes. Before filing, confirm which change is needed and gather the complete Assessor Parcel Numbers for every affected property. A parcel combination or segregation request changes how property is represented in assessment records; it does not automatically approve development, modify zoning, create legal lots, or transfer ownership. The applicable requests are available through the official Assessor forms collection.
Can I download Form 571-L online?
Form 571-L, the Business Property Statement, is available only upon request rather than as a standard downloadable form. Businesses should use the county’s Business Property, Aircraft and Vessels service to obtain the correct filing materials. Do not substitute a prior-year form unless the Assessor authorizes it. Current instructions and depreciation schedules should be reviewed because reporting requirements may vary by assessment year and property type.
Which address-change form should I submit?
Select the form based on the property account involved. Residential and commercial real estate use the real property address-change process, while business personal property, vessels, and aircraft have separate forms and instructions. Updating a mailing address only changes where assessment correspondence is sent; it does not change ownership or title. The county’s Address Change Request page organizes the available options by property category.