Sydenham is a suburb which lies within the Territorial Authority of Christchurch, one of 116 residential suburbs which form the wider region. Sydenham is the 18th largest suburb of Christchurch in terms of the total number of residential housing stock. Sydenham 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 1970 - 1979. Residential housing stock in Sydenham is made up of approximately 97% residential housing and 3% residential investment housing properties.