Kaiaua is a suburb which lies within the Territorial Authority of Hauraki, one of 22 residential suburbs which form the wider region. Kaiaua is the 9th largest suburb of Hauraki in terms of the total number of residential housing stock. Kaiaua provides a range of housing stock, with the earliest residential housing recorded in the area constructed between 1930 - 1939. The majority of the residential housing stock in the locality was constructed between 1960 - 1969. Residential housing stock in Kaiaua is made up of approximately 78% residential housing , 1% residential investment housing and 22% lifestyle properties.