19 Theberton Street
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Basement extension to a grade II listed georgian terrace house
The extension is built under the entire garden in a design that rebalances narrow vertical family spaces for their brief for modern living - but without impacting the listed structure. The gardenwas removed and replaced on top of a fully insulated, well-ventilated concrete and masonry box to provide a new family chill-out space.
In one corner a volume, built from reclaimed bricks, houses new shower / utility space to make a third storey underpinning under the old rear ‘closet’ wing. By separating the garden completely from the house, this extruded masonry box is expressed vertically through fritted structural glazing that makes a bridge for access from the ground level to the walled garden; and the southerly aspect allows angled sun to penetrate the new lower level throughout the day.
Data
- Begun: Oct 2012
- Completed: Apr 2013
- Floor area: 30m2
- Sector: House
- Total cost: £238,000
- Tender date: Apr 2012
- Procurement: Traditional - JCT Intermediate Building Contract with Contractor's Design 2011
- Address: 19 Theberton Street, London, N1 0QY, United Kingdom
Professional Team 
- Architect: Robert Dye Architects
- Client: Private
- Services engineer: Peter Deer Associates
- Main contractor: Ethos Construction
- Quantity surveyor: Nigel Ray and Partners
- Structural engineer: Greig Ling
Suppliers
- Concrete floor and steps: Abbey Flooring
- Windows and structural glazing: Everglade
- Basement waterproofing and polyroof: Volclay Voltex
