As well as educating young people, the Seashell Trust also provides services such as physiotherapy, language therapy, sports activities and family support.
Claire Sefton, the principal of Royal College Manchester, said the existing facilities were no longer fit for purpose.
She said: “There are small rooms with low ceilings and narrow corridors.
“Our students have a range of complex medical needs.
“Some require feeding though pegs.
“Some students need a lot of space and we’re not able to provide that all of the time.
“Everything we do at the college is to prepare young people for adulthood.
“That might be in supported living or residential care.
“We just see opportunity for our young people – we don’t see barriers.
“The new facilities will lead to better outcomes for our young adults.”
The new Royal College Manchester building is due to be completed in 2026.
