How David built an ‘ambitious’ Toorak house that’s extraordinary inside and out

Key points

• A Toorak home designed by Melbourne architect John Wardle is for sale for the first time, quoting $11.5 million to $12.65 million. Owner David Sutton, an engineer and chairman of clean energy firm RayGen, built Limestone House to passive-house principles.
• The four-bedroom home at 3 Leighton Court is the first in Australia designed under both Passivhaus principles and the Living Building Challenge. It features 40 solar panels, a battery and a 31,000-litre rainwater tank.
• The Suttons plan to move on to an apartment in East Melbourne and a house in Lorne.