Sources & Methodology

1. Overview — Why a Tiered Hierarchy

The United States has roughly 3,000 counties, and each one has an office responsible for property assessment — the assessor, appraiser, or central appraisal district. Above the county sits a state property-tax oversight body — California’s State Board of Equalization, Florida’s Department of Revenue Property Tax Oversight, Texas’s Comptroller Property Tax Assistance Division, New York’s Office of Real Property Tax Services, Maryland’s State Department of Assessments and Taxation, and the equivalent in every other state. The systems differ in detail. Information about a single property — its assessed value, exemptions, sale history, parcel boundaries — can come from the county portal, the county’s GIS, the recorder’s office, the tax assessor-collector’s office, the state oversight body’s reference materials, or any of several professional-standards bodies. We work from a tiered source hierarchy where higher-tier sources govern when sources conflict.

Office naming conventions vary by state. Most states use “County Assessor” (e.g., Los Angeles County Assessor, Cook County Assessor’s Office). Florida and a few others use “Property Appraiser” (e.g., Miami-Dade County Property Appraiser). Texas uses “Central Appraisal District” (e.g., Harris County Appraisal District). Some states combine the office with tax collection (“Tax Assessor-Collector”); some assess at the township or municipal level. Our county guides reflect the local naming convention.

Examples of statutory frameworks we work to as Tier 3 references: California Constitution Article XIII A (Proposition 13, 1% cap on assessed value, 2% annual increase cap until reassessment on transfer or new construction), California Revenue and Taxation Code; Florida Constitution Article VII §4(d) (Save Our Homes 3% annual increase cap on homesteaded property), Florida Statutes Chapter 192–197; Texas Tax Code Title 1 Subtitle E (the “Property Tax Code”); New York Real Property Tax Law (RPTL); Pennsylvania consolidated statutes Title 53 and Title 72; and the equivalent statutory schemes in every state.

• International Association of Assessing Officers (IAAO) — sets professional standards for mass appraisal and assessment administration. Standards include the IAAO Standard on Mass Appraisal of Real Property, Standard on Verification and Adjustment of Sales, Standard on Ratio Studies, Standard on Property Tax Policy, Standard on Public Relations, and Standard on Professional Designations. Used as background context for what counties strive to do well.
• Uniform Standards of Professional Appraisal Practice (USPAP) — administered by the Appraisal Foundation. Sets ethics and performance standards for individual appraisers, including those working for or contracted by county assessor offices. The current USPAP edition is the authoritative reference.
• Appraisal Subcommittee (ASC) — the federal body that supervises state appraiser regulatory programs (asc.gov) under Title XI of FIRREA.
• National Association of Counties (NACo) — referenced for county-level governance context.

Examples: California State Board of Equalization Assessors’ Handbook series; Texas Comptroller’s Property Tax Assistance Division publications; Florida Department of Revenue Property Tax Oversight publications; New York ORPTS taxpayer guides and assessor manuals; Maryland SDAT taxpayer publications; and equivalent publications from other state oversight bodies.

8. Verification Workflow — Eight Steps Before Anything Goes Live

1. Identify the right authoritative source. The county’s own .gov page, plus the state property-tax oversight body.
2. Verify URLs are live. A human editor clicks every link before publication.
3. Walk through the property search. An editor performs a real property search on the county’s portal — by address, by owner name, by parcel ID — to confirm the step-by-step description matches the current interface.
4. Cross-check exemption procedures and deadlines. Against the county’s published exemption forms and the state oversight body’s reference.
5. Cross-check the assessment appeal procedure. Against the county’s appeal forms and the state oversight body’s framework.
6. Verify the GIS / parcel-map URL where one exists. Some counties have integrated GIS; some link to a state or regional GIS provider; some don’t have one.
7. Dial-test the office’s main phone number. Quarterly cycle.
8. Editor sign-off. A second editor reviews end-to-end, including a fresh check on the FCRA non-CRA notice and the “verify with county before relying” caveat.

9. Sources We Avoid

• “People search” aggregators that combine public records with personal-information profiles — using these in our research would be inconsistent with our editorial position and the FCRA framework
• FCRA-prohibited tenant-screening operations that market property records as a substitute for CRA-issued reports
• Paid-access services for free county records — operations charging for what the county provides free
• Title-broker operations not licensed in the state where they advertise — title work is licensed activity
• Foreclosure-list aggregators that misrepresent the official county foreclosure or tax-sale process
• Operations claiming affiliation with county assessors or state oversight bodies when they have none
• Anonymous user-generated forums as standalone authority on current procedures — forums are useful for community context but not for current portal URLs or appeal deadlines
• Other property-records aggregator sites — we work to the original county office, not to other aggregators that may themselves be working from stale data
• Outdated assessor handbook editions — we work to the current published edition

10. FCRA Framework Reminder

Information on the site is general educational content drawn from authoritative public sources. It is not a "consumer report" under the Fair Credit Reporting Act (15 U.S.C. § 1681 et seq.) and assessorpropertysearch.org/ is not a Consumer Reporting Agency. Do not use any content on this site to make employment, credit, insurance, tenant-screening, or any other FCRA-permissible-purpose decisions. Public availability of property records does not exempt a user from FCRA liability when those records are used for FCRA-regulated decisions. We do not provide background checks, tenant-screening reports, or any other consumer report.

11. State Confidentiality Protections

Many states have statutes protecting specific assessor records from public disclosure for designated categories of individuals — judges, prosecutors, law enforcement officers, victims of domestic violence, victims of stalking, and others. Examples include California’s “Safe at Home” address-confidentiality program for protected categories, Texas’s confidentiality provisions for judicial officers and law enforcement, and similar programs in many other states. Our editorial content respects these protections. We do not assist circumvention of state confidentiality programs and we do not link to or promote operations that do.

12. AI & Automation Policy

We use software tools for spell-check, grammar review, and routine drafting assistance. However, no editorial fact, URL, exemption deadline, appeal procedure, address, phone number, or walkthrough step on assessorpropertysearch.org/ is published from AI without human verification against the county's own published page. Every county guide passes through human editorial review, including the eight-step verification process. We do not auto-generate or auto-publish county guides.