Upper Plain is a suburb which lies within the Territorial Authority of Masterton, one of 23 residential suburbs which form the wider region. Upper Plain is the 5th largest suburb of Masterton in terms of the total number of residential housing stock. Upper Plain provides a range of housing stock, with the earliest residential housing recorded in the area constructed between 1880 - 1889. The majority of the residential housing stock in the locality was constructed between 1990 - 1999. Residential housing stock in Upper Plain is made up of approximately 9% residential housing , 1% residential investment housing and 91% lifestyle properties.