On-site wastewater is treated and dispersed to garden beds while roof run-off is directed to soak pits to support groundwater recharge. PHOTOS: BIDDI ROWLEY AND ANDA BULGAKOVA : From concrete to comfy

The dining area is in the original part of the house. : From concrete to comfy

The view from the living room, looking through to the glazed link, which has recycled timber on the ceiling. In the background, afternoon winter light hits the concrete wall of the original farm shed, which is now the guest bedroom. : From concrete to comfy

Chaney & Norman Architects ‘‘amplified the existing lean-to language’’ with angular, mono-pitched roofs. : From concrete to comfy

Openings were carefully designed for winter solar gain, daylight and cross-ventilation. : From concrete to comfy