Recent major renovations were completed in 2006, including the construction of a new science wing.

The high school's new stadium, renovations to the baseball and soccer fields, and the addition of a new concession stand were all completed in the summer of 2007.

As part of the renovations, the previously adjacent Kennett Middle School was relocated to Landenberg, Pennsylvania, in a newly constructed building of its own.

[3] During the 2018–2019 and the 2023-2024 seasons, the KHS Boys Swim team were the Ches-Mont League American Division Champions.

[5] Music students at Kennett have also participated in the Pennsylvania Music Educators Association district, region, and state festivals for band, chorus, and orchestra.