1135 - Hill House

Islington

Refurbishment and extension of existing 1960’s 14-storey RC frame office in Archway, re-clad and converted to residential usage. 

Key Features

• Tower extended up by three storeys, and the plinth outwards with new cantilever balconies, without any foundation or column strengthening. 

• Pioneering approach developed to justify lateral stability over increased height; a UK-first, using high-strength carbon fibres bonded to existing shear walls.

• Change of use to residential via permitted development rights.

• Historic structural drawings were lost, so HTS commissioned sufficient surveys to back-calculate the capacity of existing structure and confirm the viability of proposals.

• New ‘blue-roof’ attenuates rainwater flows without the need for a large buried tank.

Client: EventInv LtdArchitect: Hawkins Brown

Collect Project

People:
Andy Heyne