In the early 1970s, an addition to those wings was added to house the high school's musical and science programs.

In 1981, all portions of the three-part 'wing' were incorporated into the Kennebunk Junior High School when a larger wing, built onto the left side of the main building on Memorial Field was added to replace the facilities in the older addition(s).

The wing to the left, which housed the English department, was completely leveled to make room for the larger addition.

Other 1981 changes to the main building include the replacement of the wooden staircases in favor of fire-retardant steel, the installation of lower 'hanging' ceilings and the placement of carpets over the tiled floors.

Though included in the remodeling of 1981, the auditorium still features the extensive original decorative tile work along the walls and surrounding the stage.

On Tuesday, January 21, 2014, Kennebunk, Kennebunkport and Arundel voted to reject a proposed $75 million bond to renovate three schools.

Subjects include “Art, Computer Science, Biology, English Literature, English Language and Composition, Calculus (Levels AB and BC), U.S. History, European History, US Government, Comparative Governments, Chemistry, Statistics, and Physics C.”[7] International Baccalaureate Kennebunk High School also offers courses within the International Baccalaureate curriculum, as set by the IB Organization.

Kennebunk High School has a large music program, with two choirs and two bands, as well as the "Kennefunk Jazz" club.