I need to know how to find out how much it costs for new construction

We are going to build a home where our neighbors have comcast internet service.  How do I found out what the cost will be and what the process is to bring internet to our new residence?  There doesn't seem to be a number to call and I cannot find anything online.  I am lost and I need to know this ASAP or we won't buy this lot and build here.  Thank you!