If you're searching for a dog-friendly apartment, you might as well skip most of the buildings on the Near North Side, including those in the Gold Coast and Old Town.
According to our at-a-glance spreadsheets, the Near North Side has a lower percentage of buildings that allow dogs than any other neighborhood near downtown. Out of the 29 rental developments we've identified there, just five are fine with Fido: 1350 North Lake Shore, Chestnut Tower (121 West Chestnut), 40 - 50 East Chicago, 1 East Delaware, and 1000 North LaSalle.
On the other hand, cats and their companions are in luck -- most of the Near North Side's building's are feline-friendly. We could only identify three buildings in the area that did not allow pets of any kind.