Most concrete swimming pools cost $20,000 to $45,000, not any including decking or patio you add. Optional features such as heaters, lights, slides and automatic pool covers will also add to the total purchase price.1  An average-size pool that is 30 to 35 feet in length and 4 or 5 feet deep might cost $25,000 to $30,000. A pool that is the same length but 6 feet deep with standard concrete decking, upgraded lighting and a diving board might cost $30,000 to $35,000. 2  A large pool-say 40 inches long and 6 feet deep-with a spa and heater, upgraded stamped concrete decking, upgraded lighting and a diving board might cost $50,000 or more.