Keep the research open
The ownership database, map, and search tools stay free for homeowners, journalists, and researchers.
Independent public research
Tracing who owns a contractor can take time: company names change, parent companies sit behind local brands, and public records do not always agree. This project gathers the sources and explains what they do—and do not—show.
A contribution helps maintain the free database, map, and research behind it. Give an amount that feels right for you; the site remains free if you choose not to give.
What your support sustains
The ownership database, map, and search tools stay free for homeowners, journalists, and researchers.
Contributions help make room for source checks, ownership changes, and corrections across the markets we cover.
The project publishes sources and uncertainty so people can inspect how a record was classified.
Contributions are voluntary and are not represented as tax-deductible charitable gifts. They do not change a company’s classification, record order, or inclusion in the directory.