Data Sources & Methodology
Transparency is at the core of Landlord Mapper. Here is exactly where our data comes from and how we use it.
Parcels Database
A comprehensive, denormalized registry of property parcels. This dataset includes physical addresses, geospatial coordinates, and linked title holders.
Owners Registry
Our proprietary database mapping LLCs and shell companies to actual human owners and management companies using public records.
Data Accuracy
While we strive for accuracy, property ownership data can change daily. Information provided here should be verified with official county records before taking legal action.
Report an errorOur Technology
Landlord Mapper aggregates data from multiple municipal and state-level feeds. We use Supabase for real-time data storage and retrieval, ensuring that our "Parcels" and "Owners" APIs serve the most up-to-date information available.
Data processing involves normalizing addresses (e.g., "St" to "Street") and cross-referencing mailing addresses to identify portfolio owners hiding behind separate LLCs.