"Named after the metre-thick cast concrete wall separating mirrored dwellings, Party Wall House traces a clean outline on a bush-clad hillside in Wellington. Answering the brief to reimagine density, Ben Mitchell-Anyon and Sally Ogle of Patchwork Architecture subvert a number of notions about duplex living. A singular roof brings elegance to a two-part project and enables efficiency in siting, retaining existing trees for both outlook and privacy."