Witherlea is a suburb which lies within the Territorial Authority of Marlborough, one of 36 residential suburbs which form the wider region. Witherlea is the 2nd largest suburb of Marlborough in terms of the total number of residential housing stock. Witherlea 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 1990 - 1999. Residential housing stock in Witherlea is made up of approximately 97% residential housing , 1% residential investment housing and 2% lifestyle properties.