Roof Terrace

An accessible flat roof area used as external amenity space, typically on top of a single-storey extension or a lower-level portion of the house. Roof terraces almost always require planning permission. They must be structurally engineered to carry imposed loads (people and planters); waterproofed to a higher standard than a non-trafficked roof; provided with adequate drainage; and fitted with safety balustrades at least 1,100 mm high.