City Logical makes sense of municipal data. Our Chicago platform unifies scores of public and private data sources into a legible record at every level: city & neighborhood, precinct & ward, parcel & block.

Our commercial product, PropertySentinel, builds the public record of every address in Chicago. It is used by tenants, property managers, investors, and underwriters. We also brief aldermanic offices on ward activity, aid investigative reporters on data-driven stories, and support housing policy researchers on diagnosing property conditions.