This intelligent and award-winning home is a snug fit to the landscape of the Glaven Valley in North Norfolk. The building is composed around the generous main living space articulated in a rustic Corten weathering steel. A gull-winged sedum roof supports rain-water attenuation and biodiversity, creating dramatically high ceilings and the opportunity for clerestory windows that flood the space with light. Full-height glazing peels back surprisingly on the corner, dissolving the distinction between inside and out around the dining space, and leaving the roof elegantly supported by a single slender post. Wrapping round this heart of the family home, a knapped-flint, staggered wall creates a series of outward-facing en-suite bedrooms, each with private garden views. Located in a conservation area, this traditional material is given a modern feel by its rigorous detailing. Regular stone sizes squared off on the corners with flush mortar joints give the building its aesthetically pleasing pattern. The flint walls are brought inside; both distinguishing private living quarters from social spaces and enhancing the heavy sense of the solidity of the building. Orientated according to environmental principles, the house is passively as well as actively sustainable. The building fabric is highly insulated and air-tight to an exemplary standard employing Passivhaus technologies such as a twin stud timber frame, triple glazing and an insulated raft slab. Solar panels and Air Source Heat Pump support the energy requirements of the house.