One Tree Hill
Statistical Area - sa2

An assessment of population growth drivers in One Tree Hill reveals an overall ranking slightly below national averages considering recent, and medium term trends

One Tree Hill's population was 2,473 people according to the 2021 Census. By Aug 2025, it had increased to around 2,531, reflecting a growth of 58 people (2.3%) since the Census date. This increase is inferred from the estimated resident population of 2,523 in June 2024 and an additional 10 validated new addresses since the Census date. The population density ratio was 19.4 persons per square kilometer as of Aug 2025. Overseas migration contributed approximately 52.0% to overall population gains during recent periods, with all drivers including interstate migration and natural growth being positive factors.

AreaSearch adopted ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered by this data and years post-2032, the SA State Government's Regional/LGA projections by age category were used, released in 2023 based on 2021 data, adjusted employing weighted aggregation methods from LGA to SA2 levels. By 2041, a significant population increase is forecast for One Tree Hill, with an expected growth of 643 persons, reflecting an overall increase of 25.1% over the 17-year period.

AreaSearch assessment of residential development drivers sees a low level of activity in One Tree Hill, placing the area among the bottom 25% of areas assessed nationally

One Tree Hill has seen approximately five dwellings granted development approval annually. Between financial years FY-21 and FY-25, 28 homes were approved, with one more approved in FY-26 to date. On average, each dwelling constructed over these years accommodated 1.3 new residents per year.

This balance between supply and demand supports stable market conditions. The average construction value of new properties was $678,000, indicating a focus on the premium segment with upmarket properties. In FY-26, commercial development approvals totalled $143,000, suggesting a predominantly residential focus in One Tree Hill. Compared to Greater Adelaide, One Tree Hill's building activity is 88.0% lower per person, which typically strengthens demand and prices for existing properties due to the scarcity of new dwellings. This lower activity also reflects market maturity and possible development constraints.

All recent building activity consists of standalone homes, preserving One Tree Hill's low density nature and attracting space-seeking buyers. As of now, there are an estimated 628 people per dwelling approval in the area. Future projections indicate One Tree Hill adding 635 residents by 2041. If current development rates continue, housing supply may not keep pace with population growth, potentially increasing competition among buyers and supporting stronger price growth.

One Tree Hill has emerging levels of nearby infrastructure activity, ranking in the 30thth percentile nationally

Changes to local infrastructure significantly impact an area's performance. AreaSearch has identified 51 projects likely affecting the area. Notable ones include Eyre Sports Park, Eyre Residential Development, Defence and Aerospace Precinct at Penfield, and Mark Oliphant College Community Facility. The following list details those most relevant.

Professional plan users can use the search below to filter and access additional projects.

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Employment conditions in One Tree Hill rank among the top 10% of areas assessed nationally

One Tree Hill has a skilled workforce with prominent representation in essential services sectors. Its unemployment rate was 0.9% as of June 2025, showing an employment growth of 1.5% over the preceding year.

In June 2025, 1,483 residents were employed, with an unemployment rate of 3.1%, lower than Greater Adelaide's rate of 4.0%. Workforce participation was 66.2%, compared to Greater Adelaide's 61.7%. Dominant employment sectors include construction, health care & social assistance, and education & training. Construction stands out with employment levels at 1.6 times the regional average, while health care & social assistance shows lower representation at 12.7% versus the regional average of 17.7%.

AreaSearch analysis indicates that between June 2024 and June 2025, employment levels increased by 1.5%, labour force grew by 1.3%, leading to a decrease in unemployment by 0.2 percentage points. In contrast, Greater Adelaide saw employment growth of 2.1% and labour force growth of 2.1%, with a marginal rise in unemployment. National employment forecasts from Jobs and Skills Australia (May 2025) project national employment growth of 6.6% over five years and 13.7% over ten years, with varying growth rates across sectors. Applying these projections to One Tree Hill's employment mix suggests local growth of approximately 6.1% over five years and 12.8% over ten years.

Income analysis reveals strong economic positioning, with the area outperforming 60% of locations assessed nationally by AreaSearch

One Tree Hill had a median taxpayer income of $51,108 and an average income of $56,363 according to AreaSearch's aggregation of postcode level ATO data for the financial year 2022. This is lower than national averages, with Greater Adelaide having a median income of $52,592 and an average income of $64,886 in the same period. Based on Wage Price Index growth of 12.83% since financial year 2022, estimated incomes for September 2025 would be approximately $57,665 (median) and $63,594 (average). Census 2021 data shows One Tree Hill's household incomes rank at the 82nd percentile with a weekly income of $2,277. The earnings profile indicates that 34.0% of residents earn between $1,500 and $2,999 per week (860 people), aligning with regional levels where this cohort represents 31.8%. One Tree Hill demonstrates affluence with 32.8% earning over $3,000 weekly, supporting premium retail and service offerings. After housing costs, residents retain 90.0% of their income, reflecting strong purchasing power. The area's SEIFA income ranking places it in the 7th decile.

One Tree Hill is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership

One Tree Hill's dwellings, as recorded in the latest Census, were entirely houses (100.0%) with no other types such as semi-detached units or apartments. This contrasts with Adelaide metro's dwelling structure of 83.7% houses and 16.2% other dwellings. Home ownership in One Tree Hill was at 49.1%, higher than Adelaide metro, with the remaining properties either mortgaged (46.7%) or rented (4.3%). The median monthly mortgage repayment in One Tree Hill was $1,995, above Adelaide metro's average of $1,300. Weekly rent in One Tree Hill was $300, compared to Adelaide metro's $265. Nationally, One Tree Hill's mortgage repayments were higher than the Australian average of $1,863, while rents were lower at $375.

One Tree Hill features high concentrations of family households, with a higher-than-average median household size

Family households account for 87.6% of all households, including 44.1% couples with children, 38.1% couples without children, and 5.4% single parent families. Non-family households constitute the remaining 12.4%, with lone person households at 10.8% and group households comprising 1.2%. The median household size is 2.9 people, larger than the Greater Adelaide average of 2.6.

Educational outcomes in One Tree Hill fall within the lower quartile nationally, indicating opportunities for improvement in qualification attainment

Educational attainment in One Tree Hill is notably high, with 20.7% of residents aged 15 and over holding university qualifications, compared to the broader SA3 area average of 10.2%. This educational advantage is evident across various levels: bachelor degrees at 14.3%, postgraduate qualifications at 4.0%, and graduate diplomas at 2.4%. Vocational credentials are also prominent, with 41.7% of residents aged 15 and over holding such qualifications, including advanced diplomas (11.6%) and certificates (30.1%). Educational participation is high, with 26.4% of residents currently enrolled in formal education, comprising 9.8% in primary, 8.1% in secondary, and 5.0% in tertiary education.

One Tree Hill Primary School serves the local community, with an enrollment of 262 students as of a recent report. The school operates under typical Australian conditions (ICSEA: 966) and provides balanced educational opportunities focusing exclusively on primary education. Secondary options are available in nearby areas. As of a recent study, school places per 100 residents stood at 10.3, below the regional average of 17.1, indicating some students may attend schools outside One Tree Hill.

No public transport data available for this catchment area.

One Tree Hill's residents are healthier than average in comparison to broader Australia with a fairly standard level of common health conditions seen across both young and old age cohorts

One Tree Hill residents show relatively positive health outcomes, with common conditions similar across young and old age groups. Private health cover stands at approximately 48%, lower than the national average of 55.3%.

The most prevalent medical conditions are arthritis (9.3%) and asthma (7.3%). A total of 68.9% report no medical ailments, compared to 63.4% in Greater Adelaide. The area has 18.7% residents aged 65 and over (472 people), higher than the Greater Adelaide average of 13.3%. Seniors' health outcomes are notably strong, outperforming the general population in health metrics.

One Tree Hill ranks below the Australian average when compared to other local markets across a number of language and cultural background related metrics

One Tree Hill, surveyed in 2016, had a predominantly Australian-born population with 79.2% born there. Citizenship was high at 92.8%, and English-only speakers were 95.5%. Christianity was the dominant religion, accounting for 46.3% of residents, compared to 36.7% in Greater Adelaide overall.

The top three ancestry groups were English (34.9%), Australian (27.9%), and Scottish (7.1%). Some ethnic groups showed higher representation than regional averages: Russian at 0.9% (regional average 0.3%), German at 6.4% (4.4%), and Dutch at 2.1% (1.3%).

One Tree Hill hosts an older demographic, ranking in the top quartile nationwide

One Tree Hill's median age is 46 years, which is significantly higher than Greater Adelaide's average of 39 years and Australia's national average of 38 years. The age profile shows that individuals aged 55-64 are particularly prominent, making up 18.6% of the population, while those aged 25-34 constitute only 6.5%. This is notably higher than the national percentage for the 55-64 age group, which stands at 11.2%. Between 2021 and the present, the proportion of residents aged 15-24 has increased from 13.7% to 15.3%, while those aged 35-44 have risen from 10.9% to 12.1%. Conversely, the percentage of individuals aged 45-54 has decreased from 15.5% to 13.5%. Population forecasts for the year 2041 indicate substantial demographic changes in One Tree Hill. The 45-54 age cohort is projected to grow by 53%, adding 182 residents and reaching a total of 523. Meanwhile, the 65-74 age cohort is expected to grow by a modest 3%, with an increase of 8 people.