The building was constructed near the site of James Watt's birthplace (which was on the other side of William Street) and was built with funds donated by another famous Scot, Andrew Carnegie, who performed the opening ceremony, unveiling a statue of James Watt that stands prominently in the angle formed at the corner tower.
H & D Barclay of Glasgow designed the original red sandstone building in a heavily ornamented Scottish baronial style, The corner is marked by an L-plan tower, the wing to William Street being capped by a crow step gable while the north wing has a conical roofed tower above a balustrade.
The college relocated to its present Finnart Street site near Greenock West railway station in 1973, the eight-story main teaching block (by Boissevain and Osmond) dominating the area.
The 1970s also witnessed a move away from traditional heavy industries into other areas of commerce and as a result, the college adapted to offer a different education focus.
In the 1990s the college expanded to include campuses on the Greenock waterfront, at Kilwinning in Ayrshire, and at the Inverclyde National Sports Training Centre in Largs.