Sumner House, Sevenoaks

ADP for private client
Contract value: undisclosed 
GIA: 460m²

An arts and crafts inspired home replacing a 1960s bungalow in a conservation area, this house manages to pack in four floors while appearing much more modest to the street. Solid brick and a steep slate roof define the asymmetric north facing facade with its expressive chimneys, while the house opens up to private spaces to the south. The central hall, based on the local historic precedent of Wealden House, helps ensure acoustic privacy. Incorporated in the environmental approach were ground-sourced heating and cooling, MVHR, natural ventilation chimneys, controlled natural light, photovoltaics and rainwater harvesting.

See the rest of the South East shortlist here. And all the RIBA Regional Awards shortlists here.