Chicago Verifying Legal Units

[Luke Stone]

Hi all,

I am looking at a property in the City of Chicago, that I am pretty sure was a five unit building and has been converted to three large units.

What is the most reliable source for verifying the number of legal units for a property in Chicago? I am aware of the Chicago Building Codes Violation website shows the number of dwelling units, but does anybody know if the information on their website is accurate? Do you have to dig further and go downtown to confirm the findings on the building codes website?

Thanks