Single Family Home for sale by owner in Watertown, SD 57201. I have lived here for 20 years and love the country view and the wildlife around here. I am selling to move to another home. The house and property sits on 5 acres and has two 55 foot cement encased wells that have been tested with a high mineral content and excellent water. There is rual water avalible if thats what you prefer. It has blown in insulation and electric heat that has never exceeded $250 a month on the coldest winter mont... See site for full property details.