The average cost to drill a wellis $5,300 to $9,200 for an average depth of 150 feet. Well drilling costs vary depending on the depth drilled, the condition of the soil, and the diameter of the well. Residential water wells are typically 100 to 300 feet deep and have a diameter of 4 to 6 inches.
Drilling a residential water well costs $25 to $65 per foot for a complete water system that includes the drilling, a well pump, casing, wiring, and more. If you already have a well on your property, a new well pump costs $400 to $2,500, depending on the type of pump installed.