In 1879, Barnstable High School moved back to Hyannis for good. Additional wings were added in 1963 and 1976, and in 1998 the addition of a professional class performing arts venue and new wing were added. Since then, the school continues to improve its grounds and has added a phenomenal Astro Park and astronomy observatory in what was once called the Quad. 

Beyond physical improvements to its grounds, it boasts a top-notch TV production studio used to film Barnstable Today and local public broadcasting, notable arts offerings and a full range of academic and athletic programs.

In the fall of 2010, the track and football field were renovated.  

The school serves grades eight through 12. However, there are several programs and services available to town residents and students after school hours and during the summer including movie nights in the astro park.