A presentation paper examines the planning, coordination, design, and phasing of construction required for a new 340,000 sq.ft. high school (Chantilly High School, Fairfax, Virginia) plus adding 46,000 sq. ft. to the facility while keeping the educational program for 2,100 students active. The project's scope is outlined, followed by the design coordination and approval process, construction phasing and scheduling, contract award, and the construction process. Attachments provide the existing and new building floor plans and detail each of the paper's main discussions. (GR)