The mall cost nearly $6 million to construct over a span of two years. During the summer of 1962, Harold Slawik died, leaving his wife in charge of the mall's construction; Mrs. Slawik reportedly worked 80 hour weeks in order to keep up with the mall. In May of the same year, Target constructed their first location in a parking lot directly north of Har Mar. While nearby Rosedale Center was constructed in 1969, Har Mar went through a significant expansion in the early 1970s.