[3] Kling's design consisted of five buildings connected by covered walkways otherwise open to the elements, a style unusual for the region (and that it shared with Welsh Valley Middle School, built at the same time).

Kling intended to create a modern design that encompassed a simple and effective layout with a focus on natural light and an airy environment.

Ironically, Harriton's 1958 campus buildings surrounded a mostly concrete courtyard and was nicknamed "the Tombs" (despite the natural light and air).

By 2009, a new three-story building had replaced Kling's 1958 design, providing more sports and academic facilities to serve the growing student body.

[11] Harriton High School competes the Central League in District 1 of the Pennsylvania Interscholastic Athletic Association (PIAA).

[12] The schools has tennis, lacrosse, cross country, track and field, ice hockey, rowing, football, soccer, and swimming.

In the 2010 WebcamGate case, plaintiffs charged Harriton High School and Lower Merion High School with secretly spying on students by remotely activating webcams embedded in school-issued laptops the students were using at home, thus infringing on their privacy rights.

The schools admitted to secretly snapping over 66,000 webshots and screenshots, including webcam shots of students in their bedrooms.