[7] Alongside the historic Summit School building and the school's dormitory for boarding students, modern additions to the Northwest campus were completed in 2006 (expanded photography studio, library, and computer lab) and 2014 (gymnasium, fitness mezzanine, dining room, kitchen, black-box theatre and a rooftop sports field).

The social studies seminar requires completion of two senior projects: volunteer activity with a political campaign during the fall and a written thesis during the second half of the year.

Sports played at Northwest include Soccer, Cross country running,[9] Track and Field, Basketball, Volleyball, Ultimate Frisbee, and Fitness Team.

The school's administration also works to facilitate student participation in city, regional and other intramural sports, such as golf, swimming, water polo and crew.

In fall 2011, the boys' varsity team had a perfect record of 23-0, winning the inaugural Seattle Invite and the Washington State Championship along the way.