Data: City of Chicago, Building Violations · City of Chicago, Building Permits · City of Chicago, Food Inspections · City of Chicago, Ordinance Violations (Administrative Hearings) · City of Chicago, Building Code Scofflaw List · Cook County Assessor’s Office, Assessor – Parcel Addresses · City of Chicago, 311 Service Requests · City of Chicago, Ward Offices · Cook County Assessor’s Office, Assessor – Parcel Universe, Characteristics, Assessed Values and Sales · City of Chicago, Contracts · U.S. Department of the Treasury, USAspending.gov award data (federal contracts in Cook County) · U.S. General Services Administration, SAM.gov contract opportunities (open federal solicitations in Illinois) · Cook County, Procurement – Awarded Contracts, Bid Tabulations, Intent to Award, Buying Plan. Matched to trades, grouped by address and joined to owner mailing addresses by AlderWorks.
Owner and mailing addresses come from the Cook County Assessor’s Office open data. Cook County does not endorse AlderWorks or its products.
This site provides applications using data that has been modified for use from its original source, www.cityofchicago.org, the official website of the City of Chicago. The City of Chicago makes no claims as to the content, accuracy, timeliness, or completeness of any of the data provided at this site. The data provided at this site is subject to change at any time. It is understood that the data provided at this site is being used at one’s own risk.
© 2026 AlderWorks LLC · contact@alderworksllc.com · Privacy