Experience converting single to multi family

[Dan Miklosz]

Hey BiggerPockets family,

I live in an expensive market, Chicago, where the numbers are difficult to make things work for a house hack.  The latest BP podcast got me thinking about converting a single family house into a small multi-family.  David mentioned simply putting up drywall but I have to image more is involved.  

Does anyone have experience converting a basement into a separate unit - construction/permits/zoning?  

Any tips would be appreciated!!

Dan