Sump pumps are necessary in many homes to prevent water damage. Submersible pumps are more powerful and can fully submerge in water. Depending on your local labor rates, the cost of a sump pump and French drain can range from $500 to $18,000. Coarse gravel helps the water drain into the pit. That's why it's important to keep an eye out for signs of a malfunctioning unit. Pedestal pumps are cheaper and less noisy.