cost of renovating multifamily

[Diem Tran]

Hi,

I'm guessing the best way to get the cost of renovations in apartments is to get quotes from several contractors.  But of course, you will need access to the property, or be in due diligence, etc, etc.  But what if I'm not in that phase yet?  I'm still shopping and sometimes I ask "How could I effectively submit an offer without knowing the cost of renovations?"   I've asked theses questions  before, and I always get an answer like this, "Well it all depends.  I have to look at it first."  I was wondering if there is a book or something? Thank you!