Knowing that many students needed the provision to continue into secondary school, and that there were many children struggling in mainstream secondaries, Blossom House developed a key stage 3 and 4 curriculum. When the building next door to Blossom House became available, the school moved into larger, newly refurbished premises, where it expanded into a full secondary school with a sports hall and proper provision for art, design and technology and ICT. In 2012 the school expanded further to offer a Post 16 Provision to students up to age 19.
In April 2015 the school moved again, to new and bigger premises in Motspur Park. Pupils are now benefiting from more space and better facilities, with excellent local sports and outdoor provision. Now with three sites, Blossom House has over 300 pupils aged 3 to 19 and over 300 full and part time staff.