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The Peoria County Planning and Zoning Department is located on the 3rd floor of the Peoria County Courthouse (Main Street side). The mailing address is:
324 Main StreetRoom 301Peoria, IL 61602
Planning and Zoning office hours are 8:30 a.m. to 5 p.m., Monday through Friday, excluding holidays.
The Peoria County Clerk is located in Room 101 of the Peoria County Courthouse and assigns all addresses within unincorporated areas. Planning and Zoning requires an address assignment prior to the issuance of a building permit for a new home. Please visit or call the County Clerk's office for more information.