What Are Public Property Records?
Public property records are official documents maintained by US local government jurisdictions (counties, cities, and townships) that record property ownership transfers, parcel boundary definitions, tax valuations, building assessments, and legal encumbrances. Under Freedom of Information laws, these records are public information.
Key Government Offices Maintaining Property Data
1. County Tax Assessor Offices
The Tax Assessor evaluates property values for property tax purposes. Key data available includes Assessor Parcel Numbers (APN), land assessed value, improvement assessed value, annual tax levies, and physical structural specs (sq ft, year built).
2. County Recorder of Deeds / Registrar
The Recorder office maintains legal transfer documents including Warranty Deeds, Quitclaim Deeds, Mortgages, Liens, and Book/Page volume indexes recording grantor (seller) and grantee (buyer) details.
3. Municipal GIS Mapping Portals
Geographic Information System (GIS) portals maintain spatial boundary coordinates, lot dimensions, flood zone classifications, and zoning overlay maps.
Challenges in Accessing County Data at Scale
While public records are open, extracting them across multiple counties presents major technical hurdles:
- Extreme Fragmentation: The US contains over 3,100 individual counties, each utilizing different legacy web software (e.g. Tyler Technologies, Vanguard, Beacon, qPublic).
- CAPTCHA & Session Limits: Municipal web servers impose strict session timeouts and CAPTCHA barriers on automated queries.
Automate County Property Record Searches
WebScrapingHub maintains pre-built scrapers for over 3,100 US county assessors and deed recorder registries.
Explore Property Records Scraping