The Union Street residence is an extension to the rear of a single-fronted, fully attached workers cottage in Northcote. It was designed for a couple entering retirement who were downsizing and wanting to move closer to the city. The extension contains a kitchen, dining, living area on ground floor and a study on a first-floor mezzanine.

The architecture of the extension is defined by an articulated surface that consolidates and conceals all ancillary functions. Conceived as a responsive medium, the surface shrink wraps a staircase, entertainment unit, kitchen, and wet areas, using a simple and precise set of folds. In so doing, it functions not only as an infrastructural armature, but also as a circulatory and generative element, directing internal movement, defining zones within the interior and framing views of the backyard and sky.

In addition to internal pressures, the surface also responds to the external environment, tilting down towards the backyard to drain rainwater into an underground tank and accommodate a large array of solar tiles. Internally, the inclined ceiling works in parallel with the organisation of the plan, offering spatial definition to an otherwise open volume. The low portion of the ceiling aligns with the widest part of the plan to create an intimate and subdued living space, whereas the dining, kitchen and study are progressively more animated as the ceiling approaches its dramatic high point.