There are two really good reasons to run a water line to your new fridge. First, nearly every refrigerator has built-in filtration, so it’s the perfect way to get filtered water without fussing with a pitcher. But many refrigerators also have a built-in ice maker, so you can get a never-ending supply without filling trays or buying ice in bags. “If you’re lucky enough to have an existing water line with a shut-off valve, then the connection will only cost about $150, including the materials,” says DiDona. “If you need to run a new line with valves, and have an open basement or garage beneath your kitchen, the project will usually cost about $450 including all materials.”