Figuring out utility costs

[Brock Hoffman]

How should you go about figuring out utility costs / taxes and other expenses for a particular property in your area? I am currently looking at a 4-plex, but I am having a hard time analyzing it because I don't know what accurate utility costs will be on the property. Is it okay to ask for a schedule E form / income statement / rent rolls and bank statements? Who do I ask for those documents / where do I get them?