Extending main water line to property

It’s pretty standard that if a line needs extension, the person needing the extension is responsible for it. There’s no real incentive for a municipality to extend a main for one property. They’ll pay if it’s for a bunch.

Most of the time the water utility company provides water to the meter, and the owner is responsible from the meter to where they need it.

Do you have a meter OP? Usually the utility company will move the meter to your lot, but this may also come at an initial set up.

It’s grand isle - there a numerous areas where the main line doesn’t go all the way down the street

Would the cost of this extension be my responsibility to pay to the parish?
Companies are only responsible for their services lines before the meter. Anything on the backside of the meter is the owners responsibility