Ardmore was always in the box-seat for the job after securing the contract to build the substructure for the 29-storey scheme under a separate £10m contract.
The Enquirer understands that Ardmore has now beaten Sisk and Brookfield to secure the main build on City Road for developer Groveworld.
Ardmore also built the £18m first phase of the City Road Basin scheme which consists of a 15-storey residential tower.
One rival said: “Ardmore was always the strong favourite for this one and it looks like it has now all been tied-up”