In my tiny apartment the worst offender was the kitchen. Every time the microwave or the old cordless phone went on, my Pro Controller would spike and drop. The dock sat in a cabinet under the TV, which made it worse.
Two changes fixed it. I pulled the dock out into the open and moved the router to 5 gigahertz so the 2.4 band was less crowded. When I want zero risk, I switch the controller to wired communication and use a cable. Since then it has been rock solid from the couch.
