The existing terrace house suffered from an absence of natural light. The client brief was for a proposed addition to the rear, facilitating functional living spaces, however south facing. New planning policy required no overshadowing of the neighbours’ private open space. The ‘chamfer’ and the dramatic skillion form of the bedroom above was our design response to these parameters. Glazed on all sides, the lightwell garden placed at the threshold point between old and new bring natural light, cross ventilation, and an outlook to garden to the centre of the house.