The new structure was designed to contrast with the brick Vernacular Revival style of the 19th century house, itself designed by Victorian architect Ernest Newton, one of several on Newton Park Place in the Chislehurst Conservation Area.Its oak frame was prefabricated by specialist joiner Tim Gaudin in Devon before being dismantled and reassembled on site. The rear faade has full-width 4m-wide bi-folding windows with integrated window seat, while exposed oak joists extend out to form the pergola. Planters around this are intended to support vegetation that will provide screening to the living room, solar protection and, over time, form a green enclosure for outside dining.Inside, separate spaces have been created for a kitchen, living and dining, the latter with an exposed oak joist ceiling lit by an overhead skylight and a picture window. A 3m-deep spiral wine cellar has also been created below from engineered limestone concrete.AdvertisementSolar panels have been incorporated on the roof of the main house while the extension is topped by a wildflower green roof.The garden design by Lilly Gomm extends directly out from the architecture of the house and is divided into two areas, a pond with adjacent bench seating and a larger open space with loose, naturalistic planting.Architects viewKelly was a superstar client and we loved working together to craft such a beautiful home for her and her family. In terms of natural materials, quality of space and sustainable approach this is exactly what we aim for with our residential projects and feel this has added so much to this historic home.Craig Rosenblatt, director, ROARClients viewWe absolutely love this extension, it has transformed our home and created a space we truly enjoy. ROAR has managed to marry the charm of an old gardeners cottage with a modern and quietly striking extension which pulls the garden and nature inside. My teenagers (and I) really love being home, whatever the modern word for cool is, I know they feel our house softly expresses it. ROAR was fantastic and really excelled at this high-quality architecture.Kelly Johnson Source:ROARProject dataLocation Chislehurst, south-east LondonStart on site July 2021CompletionApril 2023 (garden completed August 2024)Gross internal floor area 30m2 (extension)Form of contractJCT intermediate Building Contract with Contractors Design 2016Construction cost 450,000 (excluding VAT)Architect ROARClient Kelly JohnsonGarden designer Lilly GommJoinery Tim GaudinMain contractor Dardan Building ServicesAdvertisement