Refinish enclosed rear porch? Do I need permits for this?

[Christian Aillon]

Hey all,

First post here.  I own a 2 flat (3 units)with basement unit on the west side of Chicago.  It's a greystone in decent shape.  I live on the top floor and rent the bottom 2 units.  There is an enclosed rear porch that is unfinished and uninsulated.  The laundry is in the basement so I have to go up and down the stairs to do laundry, enter the garden, access the alley, etc.  Maybe this isn't the greatest use of money but it bothers me immensely how ****** the unfinished rear porch looks.  I'd like to finish it with insulation, electrical, dry wall, treaded stairs, etc.  Does anyone have experience with this?  Would I need to pull permits to do this?  I DO NOT INTEND TO MAKE THIS A LIVING SPACE OR EXTRA BEDROOM.  Best case, I'd put an extra fridge, some plants, storage shelves, shoe racks, etc.  I just don't want to have to look and experience the ugly rear staircase every day, especially in the summer when I am go to the yard daily to grill or play with the kids.  

Any advice or recommendations on experts on this?  Thanks!