Chicago Zoning issues with enclosed porch... what type of pro to hire to deal with city?

[John D.]

I may have a zoning issue due to the type of residential rear porch I have. What kind of professional does the city of Chicago prefer to deal with for residential zoning issues? Who should I be looking for to be the "head" of the dialogue between myself and the city and to provide the necessary documents that the city will want to see?.... Attorney?... Architect?