The building became one of the early casualties of bombing in Portsmouth during World War II and was subsequently demolished.

With post-war reorganisation resulting from the Education Act 1944, the Kingston Modern School for Girls was created in 1949.

Pupil numbers continued to increase and a new extension, which is now the current Science and Technology block, was completed in the 1960s.

To accommodate additional numbers, another new block for teaching Modern Foreign Languages and Technology was added, together with the all-weather multi-sport pitch, completed in 1998. practice rooms, additional office space and a new changing room for the Dance Studio was completed in February 2001.

This building is used by the school for lessons and other activities and is also open to bookings from the local council as well as private individuals and groups.

The centre contains offices, a fully equipped Information Technology suite, classrooms and conference room.

The last Ofsted inspection was in 2017,[5] where it was recognised that the new management was outstanding and had successfully reversed the decline in English, and Maths and had the preparations in place to transform science teaching.

In English and mathematics, teachers consistently plan focused activities which are pitched appropriately to challenge all pupils, irrespective of their starting points.

[6] Schools endeavour to get all students to achieve the English Baccalaureate (EBACC) qualification; this must include core subjects, a modern or ancient foreign language, and either History or Geography.

[7] Students in Years 7 and 8 (in Key Stage 3) study English, Science, Mathematics, Geography, History, Modern Languages, PE, RE, Art, Food Technology, and Drama.

[8] Students in Years 10 and 11 (Key Stage 4) study a core of English, Science, Mathematics, and PE.