This is the Golovin house in Mt Lawley designed in 1959 by Iwan Iwanoff. One of his earlier more straightforward modern pieces, before he started with the concrete blocks. But I use straightforward in the loosest sense, as this is an extraordinary house. The way it is sited on a tough slope, nestled into the side, and connected to the street via bridge is fantastic, and very much in keeping with contemporary practice at the time. The single long run roof pitch is also an excellent detail, it gives the house a sense of scale and a ‘big’ grand presence that belies its otherwise rather small size. Kate Hislop has written an excellent article on the house, I forget where. Anyway, amazing place.