Designed by Lord Norman Foster, the City Hall building once dubbed the ‘glass gonad’ by Boris Johnson, has stood empty for the last three years, after mayor Sadiq Khan relocated operations to a conference centre in east London in a bid to cut costs.

New owner Kuwaiti-owned St Martins Property Investments aims to remove the glass cladding to create green terraces in an office building with ground floor retail.

Existing town leaning hall profile and new green office building plan

The new design by architect Gensler and structural and mechanical and electrical engineer Waterman will also straighten the leaning profile of the building. This will be achieved by extending floor decks around the 10-storey building.

The project now known as 110 The Queen’s Walk will extend the interior space of the building from around 18,000 sq m to 22,000 sq m.