It depends on the region, the size of your crawl space, and the type of sump pump. You may have to drill a few holes in the floor or walls. If you are considering installing a pump, you should first learn more about the pros and cons of a system. However, the costs can vary based on the area you live in and the type of drain you want. This will bring the water from your crawl space out to the exterior of your home. Check that the sump basin has a cover that keeps out dirt and debris. It's also available with pre-mounted alarm floats. You can also use concrete to fill the area around the sump. In addition, regular maintenance can make the unit last longer. Water damage can cause toxic mold growth, which can result in expensive repairs. It is important to keep in mind that the sump basin should be at least 10 feet away from the walls.