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Belsize unveils 'copper' extension to listed Hampstead home

[FIRST LOOK + DRAWINGS + DATA] Belsize Architects has added this £650,000 glazed extension to a Grade II-listed house in Hampstead

The two-storey addition to an 18th century Georgian house, which replaces an existing extension over a small cellar at the rear of the property, contains a kitchen and dining area than opens onto the garden.

A layer of copper mesh, that ‘blends with the colour of the Georgian brick façade’, has been inserted between the two layers of glass to create a private space within the extension.

P1020527

A wide, double -eight void dug between the extension and the party garden wall allows natural light into a family/media room and office space in the basement level of the extension. An external terrace accesed from the lower level is connected by a brick staircase to the garden.

Site section

At the rear of the garden, a summer-house with a copper roof and sliding timber shutters sits in a sunken suntrap.

Project data

Start on site September 2011 
Date of completion October 2012                              
Gross internal floor area 238m²
Total cost £650,000
Form of contract JCT, Intermediate form of Contract
Client Private
Architect Belsize Architects
Structural engineer David Bennett Consultant Engineer
Main contractor Stem and Agate

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