Between January 2014 and January 2015, closed sales of single-family properties in Watertown, MA have decreased by 50%. The average sales price of these homes have decreased minimally, by 6.4%.Days on the market has decreased by a day, and the number of new listings in Watertown has increased by 25%. Condominium sales in Watertown have decreased by 42.9% while the average sales price of condos has increased by 5.5%. The days on the market in Watertown have decreased by 42% and the number of new listings of condos has decreased by 83.3%. The change in average sales price throughout the years in Watertown has followed very closely to all MLS, as reflected in the graphs above.