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 is 2,531 as of August 2025. This shows an increase of 58 people since the 2021 Census, which recorded a population of 2,473. The change is inferred from ABS estimates: 2,523 in June 2024 plus 10 new addresses validated since the Census date. Population density is 19.4 persons per square kilometer. Overseas migration contributed approximately 52.0% of recent population gains, with all drivers being positive factors.

AreaSearch uses ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered and years post-2032, the SA State Government's Regional/LGA projections by age category are adopted, based on 2021 data and adjusted using weighted aggregation 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 a total increase of 25.1% over the 17 years.

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 experienced approximately four dwelling approvals per year. Development approval data is produced by the Australian Bureau of Statistics on a financial year basis, with 21 homes approved over the past five financial years (from FY-20 to FY-25), and one recorded so far in FY-26. On average, 1.3 new residents arrive per year for each new home built between FY-20 and FY-25, indicating a balanced supply and demand market with stable conditions. The average construction cost of new dwellings is $678,000, suggesting developers focus on the premium market with high-end developments.

This financial year has seen $143,000 in commercial approvals, highlighting the area's residential nature. Compared to Greater Adelaide, One Tree Hill records significantly lower building activity, at 89.0% below the regional average per person. This scarcity of new dwellings typically strengthens demand and prices for existing properties. Building activity is also lower than the national average, reflecting market maturity and possible development constraints. Recent building activity consists entirely of standalone homes, preserving the area's low density nature with an emphasis on detached housing attracting space-seeking buyers.

The estimated population per dwelling approval in One Tree Hill is 628 people, reflecting its quiet, low activity development environment. Future projections indicate that One Tree Hill will add 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 in local infrastructure significantly affect an area's performance. AreaSearch has identified 44 projects that could impact the region. Notable projects include Eyre Sports Park, Eyre Residential Development, Defence and Aerospace Precinct at Penfield, Mark Oliphant College Community Facility, with the following list detailing those most relevant.

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

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

One Tree Hill has a skilled workforce with essential services sectors well represented. Its unemployment rate was 0.9% in June 2025, lower than Greater Adelaide's 4.0%.

Employment growth over the past year was estimated at 1.5%. As of June 2025, 1,483 residents were employed with a workforce participation rate of 66.2%, similar to Greater Adelaide's 61.7%. Dominant employment sectors include construction, health care & social assistance, and education & training. Construction has notable concentration at 1.6 times the regional average.

Health care & social assistance shows lower representation at 12.7% compared to the regional average of 17.7%. The area offers limited local employment opportunities as indicated by Census data. During the year to June 2025, employment levels increased by 1.5%, labour force by 1.3%, and unemployment fell by 0.2 percentage points. By comparison, Greater Adelaide recorded employment growth of 2.1%. State-level data to Sep-25 shows SA employment grew by 1.06% year-on-year with an unemployment rate of 4.5%, in line with the national rate of 4.5%. Jobs and Skills Australia's May 2025 forecasts suggest national employment growth of 6.6% over five years and 13.7% over ten years, varying by industry 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 has a median taxpayer income of $51,108 and an average income of $56,363 according to the latest postcode level ATO data aggregated by AreaSearch for financial year 2022. This is lower than national averages, with Greater Adelaide's median income being $52,592 and average income being $64,886. By March 2025, estimated incomes would be approximately $56,643 (median) and $62,467 (average), based on a 10.83% growth in wages since financial year 2022. According to Census 2021 income data, One Tree Hill's household incomes rank at the 82nd percentile with an average weekly income of $2,277. The earnings profile shows that 34.0% of residents (860 people) earn between $1,500 and $2,999 per week, aligning with regional levels where this cohort represents 31.8%. One Tree Hill demonstrates affluence with 32.8% earning over $3,000 per week, 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 dwelling structure, as per the latest Census, was entirely houses with no other dwellings. This contrasts with Adelaide metro which had 83.7% houses and 16.2% other dwellings. Home ownership in One Tree Hill stood at 49.1%, higher than Adelaide metro. Mortgaged dwellings comprised 46.7% while rented ones made up 4.3%. The median monthly mortgage repayment was $1,995, above Adelaide's average of $1,300. The median weekly rent in One Tree Hill was $300 compared to Adelaide'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 compose 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 exceeds broader benchmarks, with 20.7% of residents aged 15+ having university qualifications compared to the SA3 area's 10.2%. Bachelor degrees are the most common at 14.3%, followed by postgraduate qualifications (4.0%) and graduate diplomas (2.4%). Vocational credentials are also prevalent, with 41.7% of residents aged 15+ holding them - advanced diplomas at 11.6% and certificates at 30.1%. Educational participation is high, with 26.4% of residents currently enrolled in formal education.

This includes 9.8% in primary education, 8.1% in secondary education, and 5.0% pursuing tertiary education. One Tree Hill Primary School serves the area, enrolling 262 students as of a recent date. The school demonstrates typical Australian school conditions (ICSEA: 966) with balanced educational opportunities, focusing exclusively on primary education while secondary options are available in nearby areas. School places per 100 residents stand at 10.4, below the regional average of 17.3, 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 have a relatively positive health profile with standard common health conditions seen across both young and old age groups. Approximately 48% (~1,214 people) of One Tree Hill's total population has private health cover, lower than the national average of 55.3%.

The most prevalent medical conditions are arthritis (9.3%) and asthma (7.3%). A majority (68.9%) report no medical ailments, compared to 63.4% in Greater Adelaide. One Tree Hill has a higher proportion of seniors aged 65 and over at 18.7% (472 people), compared to 13.3% in Greater Adelaide. Health outcomes among seniors are notably strong, outperforming the general population's 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 at 79.2%. It was found that 92.8% of residents were citizens, with 95.5% speaking English exclusively at home. Christianity was the predominant religion, accounting for 46.3%, compared to Greater Adelaide's 36.7%.

Regarding ancestry, English (34.9%), Australian (27.9%), and Scottish (7.1%) were the top three groups. Notably, Russian (0.9% vs regional 0.3%), German (6.4% vs 4.4%), and Dutch (2.1% vs 1.3%) ethnicities had higher representations in One Tree Hill compared to the broader region.

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

One Tree Hill's median age is 46 years, significantly higher than Greater Adelaide's average of 39 years and Australia's national average of 38 years. The age profile reveals that residents aged 55-64 are particularly prominent, making up 18.6% of the population, compared to a national figure of 11.2%. Meanwhile, the 25-34 age group comprises only 6.5%, which is smaller than the Greater Adelaide average. Between 2021 and present, the 15-24 age group has grown from 13.7% to 15.3%, while the 35-44 cohort increased from 10.9% to 12.1%. Conversely, the 45-54 cohort has declined from 15.5% to 13.5%. Population forecasts for One Tree Hill in 2041 indicate significant demographic changes, with the 45-54 age group projected to grow by 53%, adding 182 residents to reach a total of 523. The 65-74 cohort is expected to grow by a modest 3%, adding 8 people.