A dwelling refers to a flat designed to an appreciable proportion as a place of residence, irrespective of the type of building in which it is located. Dwellings in one- or two-dwelling buildings are therefore also defined as flats.

One-to-two dwelling buildings refer to detached one- or two-dwelling buildings as well as semi-detached houses, terraced houses and link attached houses (excluding holiday homes).

Multi-dwelling buildings refer to residential buildings with three or more apartments, including housing with balcony access.

Multi-dwelling buildings include special housing like housing for student, special housing for the elderly/disabled persons and other special housing.