some places customer doesn't exactly own all the equipment supplying their premises, but they still paid for it or a significant amount of it upfront when it was installed though the utility company does still maintain it when necessary. In those cases utility company usually maintains up to and including metering on CT metered applications, anything beyond there is entirely customers responsibility to maintain.
Here in the boonies, if you need 2 miles of three phase primary distribution built to supply what you are wanting, you may not pay 100% of the construction cost, but you will be paying for quite a bit of it, and nothing there to prevent you neighbor from deciding to add a service sometime later to the distribution you helped pay a major cost for. If that distribution line is crossing your private property you have leverage as they would need easements to tap off it on your property to go to another property, but if you had a few miles built along side roadway, they can extend off that line without easement if they don't cross your property with it.