Hi TC11, you are wise to think about this in advance! The rate information I have is a couple of years old; however, it will give you a starting point. For exact rates, we will need to submit a request to have a site survey completed by our serviceability team. Cox will cover installation of an underground drop to your house up to 200 feet. 201 - 350 feet is a $500.00 flat rate. Underground lines over 350 feet are charged local market construction rates. I believe RG-6 would be sufficient, as long as you install the water-resistant kind designed for underground burial. -Becky, Cox Support Forums Moderator