Whitby is a suburb which lies within the Territorial Authority of Porirua, one of 19 residential suburbs which form the wider region. Whitby is the largest suburb of Porirua in terms of the total number of residential housing stock. Whitby provides a range of housing stock, with the earliest residential housing recorded in the area constructed between 1900 - 1909. The majority of the residential housing stock in the locality was constructed between 1980 - 1989. Residential housing stock in Whitby is made up of approximately 98% residential housing , 1% residential investment housing and 1% lifestyle properties.