The proposed development of the scheme involves the demolition of the warehouse/ storage facilities on site and formation of a basement plant area with apartments over.

The site incorporates the access drum and ventilation shafts for a Second World War deep air raid shelter together with ground levels storage buildings which are in the possession of London Underground Limited (LUL).· The site is over the underground Northern Line serving Clapham South Station.

There are to be 64 dwellings in two blocks ranging from 4 to 8 storeys above ground in a combination of affordable units and private for sale units.  The blocks are linked by an landscaped courtyard at ground floor level.

The scope of the works also included alterations and refurbishments to the WWII air vents and access drum.  These elements of the works are to be carried out under license from LUL.

The proximity of the new building structures to the existing airshafts and access drum building introduces geotechnical constraints regarding ground movement and possible settlement and the necessary adoption of a flat slab foundation structure to accommodate the effects.  The main building structure is of insitu concrete with some large span structures over the existing above ground shelter building.  The frame is clad in a combination of Zinc, Ceramic panels/ tiling, Render and Composite Glazing elements.  Roof structures are a combination of concrete flat slab, steel support structure with purlins and a waterproofing membrane.

Landscaping and external finishes are to be completed in the final phase of the project and comprises of a communal grassed and planted garden area between the blocks with selected tree planting completing the scheme. 

External hard paving to the garden and to the approaches from Balham Hill are also included in the scope. 

Existing trees to the North of the development which are on another site and encroaching over this site are protected and retained during the works