When Sydney-based design studio Anderson Architecture was asked to improve the livability of an old heritage home in the inner western Sydney suburb of Lewisham, the house suffered from a cold and dark indoor environment. Drawing on their experience on sustainable design, the architects rearranged the home in accordance to passive solar design in a light-filled transformation that earned the project its name, Suntrap. The contemporary renovation has even doubled the thermal efficiency of the living quarters from 3.2 to 6.4 stars.
With a growing family and a dog, the clients not only sought more living space, but also improved comfort and a stronger connection with the backyard. To bring much-needed natural light and an indoor/ outdoor living experience to the home, the architects tore down an existing old addition and replaced it with a new extension optimized to meet the clients’ requests. Located on a long and skinny lot, the house is mainly organized along a central corridor that connects to three bedrooms, while the open-plan living spaces are located in the rear where they connect seamlessly with the backyard. The new extension also features an expansive master bedroom suite on the upper floor.
“But our key move was to introduce an internal courtyard,” say the architects. “We opened the heart of the home to the sun, where strategically placed eco-friendly concrete walls and hydronic heated flooring brought much-needed heat gain to cold zones. New awnings let in winter sun and we specified heavily insulated prefabricated wall and roof panels, and double-glazed windows, to help maintain comfortable indoor temperatures.”
To keep costs low and reduce waste, the architects repurposed the spotted gum flooring reclaimed from the old addition into cupboard faces and the timber-lined ceiling above the kitchen. The bricks from the old kitchen were also repurposed into a strategic thermal mass wall in the backyard that doubles as a screen for a 1,400-liter rainwater tank used to irrigate the native landscaping.
Images by Nic Bower