The time it takes to clear a backed-up sewer line in your home can vary depending on the severity of the clog and the method used to clear it. If you try using a plunger or a drain snake yourself, it may take anywhere from a few minutes to a couple of hours to clear the blockage. However, if the clog is severe or the line is damaged, it may require professional help. A licensed plumber can use a variety of techniques, such as hydro-jetting or a sewer camera inspection, to diagnose and clear the blockage. The time it takes for a professional to clear the line can also vary depending on the severity of the issue. In general, it is best to address a backed-up sewer line as soon as possible to prevent further damage and avoid health hazards.