Money will be raised by Colchester based Premier Print and Promotions to make the unit at the school in Abbotts Lane, Eight Ash Green, a reality.
The print company, celebrating its 30-year anniversary in 2024, has long supported Autism Anglian.
James McQuiggan, chief executive of Autism Anglia, said: "We are delighted that the team at Premier Print and Promotions are supporting our charity so generously."
Premier Print and Promotions has already planned a host of fundraising activities to raise the necessary funds for the drama studio.
