Blue Mountains is a suburb which lies within the Territorial Authority of Upper Hutt, one of 27 residential suburbs which form the wider region. Blue Mountains is the 16th largest suburb of Upper Hutt in terms of the total number of residential housing stock. Blue Mountains provides a range of housing stock, with the earliest residential housing recorded in the area constructed between 1910 - 1919. The majority of the residential housing stock in the locality was constructed between 1980 - 1989. Residential housing stock in Blue Mountains is made up of approximately 58% residential housing , 2% residential investment housing and 41% lifestyle properties.