Maps and Plats
The Maps and Plats Kiosk provides access to city aerial maps, 80-Acre (lots) maps, and structure basemaps that show existing building footprints and an address for each building.
Click on the link below to access the maps.
House Number Certification
Under the City of Chicago Municipal Code, every building (regardless of zoning) within City Limits must have an official address (also known as House Number Certificate) as assigned by the Department of Transportation. No other entity issues official addresses within the City of Chicago. Numbers are assigned based upon frontage on or access to a street and are determined by the locations of doorways or driveways as reconciled against the City’s historical 80-Acre Maps. The Maps dictate the number that adheres to Chicago’s street grid and numbering system, thereby ensuring consistent numbering Citywide. CLICK HERE for the full process.
House Numbers / Building Address Certificates.
CDOT Coach House Policy
Right-of-Way Adjustment Programs
CDOT's Maps & Plats Unit manages several programs that can be used to facilitate changes to the configuration and ownership of public streets and alleys. Pending successful programmatic review, utility resolution, aldermanic support, and City Council passage, the resulting right-of-way adjustments can be used for industrial, commercial, residential, not for profit, or governmental expansion or development.
Program information, standard processes, and applications are included below. Please note we are now accepting applications electronically at ROWAP@cityofchicago.org.
- Street and Alley Vacation Program - Industrial Use
- Street and Alley Vacation Program - Not for Profit Use
- Long-Term Easement Program
- Right of Way Opening Program - City of Chicago Departments
- Street and Alley Vacation Program - Intergovernmental Use
- Traffic Closure Program - City of Chicago Departments
- CDOT Lighting and Electrical Engineering Standards
- CDOT Right of Way Construction Standards
- Determining Property Ownership
- Economic Disclosure Statement
- Proper Notice To Neighbors
- Recording Procedures
- Unimproved Alley Policy
CDOT Plan Review Committee
The Chicago Department of Transportation (CDOT) is responsible for reviewing development proposals that impact the public right-of-way. Prior to the legislative approval for Planned Developments, Lakefront Protection Applications and Zoning Board of Appeals, applicants must receive approval from the CDOT Plan Review Committee (PRC). Additionally over-sized driveways (any curb cut with a driveway greater than 25’ at the property line) will also need CDOT-PRC approval before a driveway permit is issued.