Use this guide to research City of Chicago permit records for one property. Start by matching the address to its parcel and confirming the permitting jurisdiction, then search City records and follow up when a result or document is missing. A Chicago mailing address by itself does not prove that a property is inside City limits.
Look up the property by address with the Cook County Assessor or search the address in CookViewer to identify the parcel and its Property Index Number (PIN). For a condominium or multi-unit building, check whether more than one parcel or PIN matches and select the one tied to the property you are researching.
Compare the parcel location with the City of Chicago boundary and use CookViewer or the responsible local authority to resolve uncertain boundaries. A Chicago mailing address or ZIP code does not establish City jurisdiction. Chicago permits apply to properties within City limits; incorporated suburbs have their own building departments, while Cook County Building and Zoning handles building matters in unincorporated Cook County. Properties in other counties also use separate authorities.
For issued permits, search the City’s Building Records portal and the Building Permits dataset by the property address. Try the official street name and reasonable address variations, including a unit where relevant. If you already have a permit number, search by that number too and compare the result with the parcel before treating it as a match.
For an application still in review or a recently issued application, use the City’s Building Permit Application Status site. The City says address searches show limited information and the site covers applications started in the last 36 months; older application or issued-permit information may not appear there. Use a known application number when available, and treat this status tool as a separate source from the issued-permit dataset.
For each likely match, compare the address and PIN, permit number, permit type, work description, issue date, status, and milestone. Fields such as status and milestone are not available for every permit type. Open the City Building Records entry to review associated permit and inspection details when present; note the inspection dates and outcomes in context.
A permit records authorization for described work. It does not prove that the work was completed or passed every required inspection. Chicago’s inspection information reflects conditions found at the time of an inspection, not necessarily the property’s current condition or the current status of an alleged violation.
The City of Chicago Building Permits dataset (ydr8-5enu) covers City-issued permits from 2006 to the present and is updated daily. It excludes permits voided or revoked after issuance, and fields vary by permit type. It is not a complete permit, inspection, or code-enforcement history, and it does not cover suburban municipalities or unincorporated Cook County.
Treat a no-result search as inconclusive. Recheck the parcel, jurisdiction, street-name and unit variations, and any known permit or application number. A gap in online results cannot establish that work was unpermitted; it may reflect the dataset boundary, a separate record system, an unavailable record, or a search mismatch.
For recent activity, check the Building Permit Application Status source and then the Building Records portal. If an older permit, inspection detail, or document is not online, contact the Department of Buildings or submit a City of Chicago public-records request with the address, PIN, known permit number, document type, and approximate date range. Ask the City to confirm which records are available and how the request should be handled; this guide does not assume that a particular record or document can be retrieved.
Start with the exact parcel: use the Assessor address search or CookViewer to find the PIN, check unit-level parcel matches, and verify whether the location is inside Chicago city limits. Search City Building Records and the issued-permit dataset with the address, then repeat with a known permit number or reasonable address variation. Compare the permit number, address/PIN, type, work description, dates, status, and any inspection details shown. Use the Building Permit Application Status help for recent applications, keeping in mind that address searches are limited and its records cover the last 36 months. If something is missing, recheck jurisdiction and identifiers, then ask the Department of Buildings or City Public Records about availability. A permit record is not proof of completion or a passed inspection; a no-result search is inconclusive.
DIY research is possible through the official City and Cook County sources above. For one property, a Permit Report organizes address-specific City-record findings with source context; Premium can include source PDFs or related filings when available. The report is limited to records the sources return and does not guarantee a complete permit history.
Basic is $29 and Premium is $79. Standard turnaround is 3–5 business days; Rush is 24 hours for +$49. Submitting the form does not collect payment: Permit Report confirms the request and sends an invoice within one business day.
Request a Chicago Permit Report →
For professional repeat or batch research, see Bulk Orders.