The firm won the job with a bid of £26m, nearly £9m below the highest price submitted in the six-bidder race, confirmed the Glasgow School of Art.
Work on the modern building, which will sit opposite Charles Rennie Mackintosh’s renowned art school building, is planned to begin later in the autumn.
The new five-storey building will boast a central circulation space with three, full-height, reinforced-concrete, circular light shafts that form the structural “backbone” to the building.
It will be clad in opaque glass with a matte finish, so there is no reflective glare from the new building onto the Mackintosh building to affect its north facing studios.