The contractor, which rebuilt the former Belmarsh West prison under a PFI deal in 2012, aims to build a £34m new house block containing 216 new cells at the Category B prison.
The new four storey L-shaped block together with a new industries building and basketball court will see the demolition of existing works departments for neighboring Belmarsh mens prison.
Under the expansion plan the existing 5.2m precast concrete wall will be extended to enclose the new buildings.
The new house block will essentially be formed from pre-cast concrete components and founded on bored piles.
The One Skanska project team will use expertise from building – central and regions, SRW, Cementation and Clark and Fenn to deliver the new facilities, which are set for completion in August 2015.
Terry Elphick, managing director at Skanska, said: “Winning the contract to expand these facilities endorses the high-quality work by the team on the original project, the top environmental standards they achieved and the good working relationship with the client.”
The main living unit was the first prison building to achieve a BREEAM ‘Outstanding’ rating. All nine other buildings achieved BREEAM ‘Excellent’.
The extension is also designed to achieve BREEAM ‘Excellent’ through efficient use of water and energy, employing environmentally friendly materials and targeting zero waste.