The new building, designed by architects Grimshaw, will house 18 laboratories and the James Caird Exhibition Hall, showcasing Sir Ernest Shackleton’s lifeboat.
Following the completion of phase one in summer 2015 phase two will begin, adding a further three laboratories, five IT suites and The Auditorium, a public space for both the college and the wider community.
McLaren managing director Phil Pringle said: “We are delighted to be part of Dulwich College’s ambitious plans to provide its pupils and the Dulwich community with a teaching and learning environment they deserve.”
The Laboratory will replace the schools existing science block, including the condemned extension wing that was demolished during the last summer holidays. The remainder of the old building will come down on completion of the new.