[citation needed] Following a number of successful financial appeals and external funding bids, the school facilities have grown and developed since 1969.

Modern foreign languages and mathematics are located in the Brabourne Building, opened by Patricia, the late Countess Mountbatten of Burma, in 1985.

There is a separate dedicated Student Services Building which following rebuilding was opened in 2014.

The school's trading subsidiary, Personal Best Education, is housed in the Malta Building.

The Mountbatten School gained academy status on 1 April 2011.