Dumb question about Zillow/Trulia

[Ben Cochran]

I'm trying evaluate a 4-plex that I found on Zillow. It states that it has a great rental history but it doesn't give any info on rental amounts. Is there a feature on Zillow or Trulia that allows me to check out rental comps in the area the property is in? Or is there a different/better way to find out rental info? I'm trying to crunch some numbers but it's difficult without knowing the rent of each unit especially as I plan to be an owner occupant and renovate over the period of a year. I'm obviously a newbie and this will be my first purchase/investment so thanks in advance.