Running the numbers on your first property

[Jimmy Ready]

Hello everyone =)

I am looking at making my first deal. I am currently in the stage of crunching the numbers and everything seems straight forward math wise (income - expenses) but my question is in regards as to HOW to calculate those expenses, specifically utilities. 

I know you can look up past property taxes for a property on the county website but how do you go about finding what the past electric, water, sewer, and garbage expenses will be? Im a newbie so any direction would be greatly appreciated.

Thank you

Jimmy