Davis Langdon to cost new £215m Tate Modern extension

Davis Langdon is to cost a spectacular new extension to the south of the Tate Modern gallery in south London. Images of the scheme, designed by the practice that converted the Bankside power station in the late 1990s by Herzog & de Meuron, were unveiled today.

QS News also understands that the team on the project includes Bovis Lend Lease, who is offering pre-construction advice, and logistics advisor Wilson James. The immensely complicated scheme is expected to be procured via the construction management route which was used for the power station conversion.

A statement from Tate Modern said the scheme's cost will be comparable to the costs of the original Tate Modern conversion: £165m at today's prices, £215m at out-turn in 2012.

The extension will link be linked to the existing converted power station with the Turbine Hall acting as its spine. The project will create 23,000 metres squared of new space increasing the overall size of the Tate Modern by 60%. The scheme is to be submitted for planning this autumn and it is hoped the building will be completed in time for the 2012 Olympic Games.