City Logical builds data infrastructure for municipal systems. Our Chicago platform unifies Cook County Assessor parcels, Chicago building records, and live 311 complaint data into a single property-level view. This data is supplemented with public listings and ownership information to create a comprehensive view of activity and compliance.

We work with housing policy researchers, investigative journalists, and aldermanic offices on accountability reporting. Our commercial product, Property Sentinel, notifies property managers of city activity at their buildings in real time.