Six Moon Hill is a residential community dwelling that was designed by The Architects' Collaborative (TAC) and is located in Lexington, Massachusetts. With a focus on collaboration rather than individualism, the TAC approach was applied to all aspects of the community: design, development, construction, and operation. TAC established a nonprofit corporation and bought 20 acres (81,000 m²) on which to build, which was divided into 29 equally-priced lots of about one-half-acre each. Original house costs were between $10,000 and $22,000. The first houses were designed and built in a modernistic way. The method of design was rectangular, flat-roofed, timber-sided homes, which was typical for residences designed by TAC.