The house is about 2000 sq ft. The router is located in the living room, which is maybe 15-20 feet away (geographically). The cord runs around a wall, up the staircase, and then around another wall then enters my bedroom and to my PC/XBOX. There is a good amount of excess cable, but I had a 100 ft cable and didn't want to buy a 50 footer. I am renting so I don't want to run cable all through the house, but we do have an attic space next to my room.
Also, I have a dual band router (AC1750 Tp Link).