Medium-density housing is a term used in Australia to describe residential developments that are at higher densities than standard low-density, (or 'broadhectare') suburban subdivisions, but not so high that they might be regarded as high density housing. The density of standard suburban residential areas has traditionally been between 8-15 dwellings per hectare. Medium density housing can range from about 25 to 80 dwellings per hectare, though most commonly the density is between 30 and 40 dwellings/hectare. Such developments may consist of detached, semi-attached and attached (or multi-unit) housing.