To find the main water shut-off valve in your home, start by checking near the perimeter of your house where the water line enters. Typically, it’s located in the basement, crawl space, or a utility room near the front of the house. In warmer climates, it might be outside, close to the exterior wall. Look for a round wheel valve or a lever handle. Knowing the location of this valve is crucial for quickly stopping water flow in case of a plumbing emergency.