Adding separate utilities to a 3-unit property

[Pandu Chimata]

Team, I am looking at 3-unit property in LA county in Southern California. it has common water line and no gas connection. Each one has a separate electrical connection. 

For rental purposes, it would be nice to have separate water connection for each unit. It's also cheaper to use gas than electricity so I need to establish gas lines as well. 

Does any one have idea how much it costs to have individual water lines and installing brand new gas lines? Or should I talk to city for water and the gas company to provide some estimates? 

Please advise.