The Government Hubs office closure and relocation plan will run over the next seven years and promises up to £1bn of fit-out work.
This will be shared between a line-up of big industry players and several smaller firms like Shaylor Group and BW Interiors.
All three lots: Mace, Interserve, Overbury, Wates Construction.
Lots 2+3: BAM Construction, ISG Fit-out, Shaylor.
Lot 2 only: Styles and Wood. Lot 3 only: BW Interiors