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An extension to a Grade II listed building by Timothy Hatton Architects

The architect’s view

Attached to a Grade II listed building and set in a strict conservation area in Richmond, the new extension was required to integrate with an existing assembly of buildings; the original 1820s cottage, the 1850s main house and a barn contructed in 1900. The new glass extension reflects its neighbors’ forms within a narrow copper framework while providing extensive south facing views.

Along with a full height double glazed rear glass wall and sliding doors to fully illuminate the extension, triangluar skylights were designed to direct light to key points, such as the dining table and kitchen work surfaces. In addition to this a large, open light-well was built between the new kitchen and existing living room to diffuse the light within both, create a south facing window for the existing living room and provide continuous views through the house.

  • Timothy Hatton, principal, Timothy Hatton Architects

Project data


Start on site: August 2010
Completion: February 2012
Gross internal area: 193m²
Form of contract: JCT Intermediate Building Contract ICD 2005 with Contractor’s design
Total cost: Confidential
Cost per m2: Confidential
Client: Confidential
Structural engineer: Price & Myers
M&E consultant: Contractor design
QS: Timms Eida & Associates
Main contractor: RJ Parry
CAD software used: Autocad
Annual CO2 emissions: not disclosed


Specified products


Clear Toughened Safety Glass

Glass UK, Sheerglass frameless double glazing system.

Internally supported by secret frame system secured to structure at top and bottom with stainless steel bolts and anchor fittings.

External leaf: Guardian Super Neutral High Performance 62132, 10mm clear toughened safety glass.

Internal leaf: 6mm clear toughened safety glass.

Full height sliding doors: Sheerglass frameless glazing system.

Stainless steel box section frame with welded corners.

Structural Silicone sealant. Nominal Joint width 12mm.

Hermetically sealed cavity with desiccant strips.


Roller Blinds

Lutron Sivoia QED 64


Copper Roof

Luvata Nordic Brown, 0.7mm thick, Quarter Hard


Roof Insulation

25mm Xtratherm Polyiso XT Zero ODP above joists, 150mm Xtratherm Thin R XT / Zero ODP between rafters; 25mm Xtratherm Poliso XT Zero ODP below joists



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