Colindale Hospital Redevelopment (London)

O’Connor Sutton Cronin have been appointed Structural and Mechanical & Electrical Design Engineers for the redevelopment of the former Colindale Hospital Site in Barnet, North London.

A mixed use, residential development situated on the site of the old Victorian Colindale Hospital and some of the development still retains the original listed façade.  On site there is 12.85 acres of green outdoor space and a central plaza with restaurants, shops and cafes.

The redeveloped site includes;
• 728 residential units
• Commercial units and site management office
• Aparthotel with roof level restaurant and ground floor commercial units
• New Station Square and Transport Interchange at existing London Underground Tube Station.

There are nine new residential buildings which vary from four to ten storeys in height, a Grade II listed building which is in need of refurbishment and seventeen new three-storey houses.

In general, the structure of the apartment blocks consists of 250mm RC flat slab supported on 200mm RC fin columns and shear walls.  A 300mm RC Flat Slab forms the podium courtyard which links the blocks at First Floor Level.  Where the residential units do not exceed 4 storeys in height, the superstructure changes to that of crosswall construction where masonry walls support precast concrete hollowcore floors.  Due to the high plasticity and relatively weak strength of the underlying London Clay, the foundations consisted of RC Ground Beams and Pile Caps supported on CFA piles.  A survey of the listed building found that the existing timber floors were to be replaced and the timber roof structure was to be made good where necessary.

Sustainable Initiatives for this development include;

• Employing Code for Sustainable Homes across the residential units
• 30% reduction in CO2 emission is envisaged, achieved via on-site renewable technology, by integrating Biomass and CHP
• The energy centres including CHP and district heating will help give the scheme fuel security and future proofing that allows new technologies to be installed.