17% of the Porirua City's households contained only one person, compared with 24.2% in the Wellington Region, with the most dominant household size being 2 persons per household in 2018.
The size of households in general follows the life-cycle of families. Households are usually small at the stage of relationship formation (early marriage), and then increase in size with the advent of children. They later reduce in size again as these children reach adulthood and leave home. Household size can also be influenced by a lack (or abundance) of affordable housing. Overseas migrants and indigenous persons often have a tradition of living with extended family members which significantly affects household size.
An increasing household size in an area may indicate a lack of affordable housing opportunities for young people, an increase in the birth rate or an increase in family formation in the area. A declining household size may indicate children leaving the area when they leave home, an increase in retirees settling in the area, or an attraction of young singles and couples to the area.
Derived from the three Census questions:
'Name of each person including visitors who spent the night of Tuesday, 5 March 2013 in this dwelling', and 'Where does the person usually live?', and 'Are there any persons who usually live in this dwelling who were absent on Census Night (Tuesday, 5 March 2013)?'
|Number of persons usually resident||Number||%||Wellington Region %||Number||%||Wellington Region %||2006 to 2018|
|6 or more persons||1,284||7.6||3.6||1,302||8.5||3.9||-18||380||1429|
Source: Statistics New Zealand, Census of Population and Dwellings (opens a new window) 2006 and 2018. Compiled and presented in profile.id by .id (opens a new window) , the population experts.
Analysis of the number of persons usually resident in a household in the Porirua City compared with the Wellington Region shows that there were a lower proportion of lone person households, and a higher proportion of larger households (those with 4 persons or more). Overall there were 17.4% of lone person households, and 34.0% of larger households, compared with 24.2% and 25.5% respectively for the Wellington Region.
The major differences in the household size for the Porirua City and the Wellington Region were:
- A larger percentage of households with 6 or more persons usually resident (7.6% compared to 3.6%)
- A larger percentage of households with 5 persons usually resident (8.7% compared to 6.5%)
- A smaller percentage of households with 1 person usually resident (17.4% compared to 24.2%)
- A smaller percentage of households with 2 persons usually resident (30.2% compared to 33.5%)
The number of households in Porirua City increased by 1,488 between 2006 and 2018.
The largest changes in the number of persons usually resident in a household in the Porirua City between 2006 and 2018 were:
- 2 persons (+642 households)
- 1 person (+360 households)
- 4 persons (+234 households)
- 3 persons (+231 households)