Help Finding Home Owners?

[Carl Lee]

Hello!

I've been lurking on the site and forums for a while now, but now I'm starting on my first deal.

I have a few prospects that I want to look into, but one has been particularly difficult. It's a single family home, which has a for-sale sign in the window but it's not listed on Zillow or Redfin--or anything like that. I think at home point it was "for-sale by owner" so there's photos, but I can't really find much else. The home is in Cook County, IL--our tax assessor's website doesn't list home owner's and the software I've been looking to look up data hasn't turned up much either.

Besides the CAD, what other places can I go to find a home owner's information?