Glentunnel is a suburb which lies within the Territorial Authority of Selwyn, one of 31 residential suburbs which form the wider region. Glentunnel is the 12nd largest suburb of Selwyn in terms of the total number of residential housing stock. Glentunnel provides a range of housing stock, with the earliest residential housing recorded in the area constructed between 1890 - 1899. The majority of the residential housing stock in the locality was constructed between 1920 - 1929. Residential housing stock in Glentunnel is made up of approximately 94% residential housing , 1% residential investment housing and 5% lifestyle properties.