Mace will lead the construction of three towers and a podium building for Phase 1, with a development value of £480m.
The buildings next to the US Embassy in London’s Nine Elms district will range from 36 to 54 storeys offering 880 flats.
According to estimates by information specialist Glenigan, Mace also jumped to third place in the annualised league for most work won on the strength of the big building order.
Kier maintained pole position the 12-month rolling league, followed by Morgan Sindall in second place.
Click for full 100 contractors league
Click for full 100 clients league
Among the other big contract wins last month, Galliford Try picked up a brace of road jobs – the £300m A47 scheme and £135m A303 – to rank top performer for civil engineering new orders.
Sir Robert McAlpine nabbed the £135.8m first phase of Edinburgh Urban Quarter for Parabola, while in Hull the £130m Royal Quarter scheme for the city council.
In York, Sisk clinched the £70m infrastructure package to open the way for the vast York Central regeneration scheme around the railway station.
McAleer & Rushe also bagged a £100m European Technology Centre for JP Morgan, Osborne+Co and Vanguard, while Buckingham secured a £120m factory kitchen project for Wren and FKX.