One Tree Hill

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, as per AreaSearch's analysis, stood at approximately 2,525 people by February 2026. This figure represents an increase of 52 individuals, a rise of 2.1% since the 2021 Census which reported a population of 2,473. The change is inferred from the estimated resident population of 2,523 in June 2024 and the addition of 10 validated new addresses post-Census date. This results in a density ratio of 19.4 persons per square kilometer. Overseas migration contributed approximately 52.0% to overall population gains recently, with all drivers including interstate migration and natural growth 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 by this data and years post-2032, the SA State Government's Regional/LGA projections by age category are adopted, based on 2021 data and adjustments made using weighted aggregation methods from LGA to SA2 levels. Future population projections indicate a significant increase in top quartile national areas, with One Tree Hill expected to grow by 643 persons to 2041, reflecting an overall increase of 25.4% 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 seen approximately five dwellings granted development approval annually. Over the past five financial years, from FY21 to FY25, 28 homes received approvals, with two more approved in FY26 so far. On average, each dwelling constructed over these years brought in 1.3 new residents yearly.

This balance between supply and demand supports stable market conditions. The average construction cost for new properties was $403,000, indicating a focus on premium segment development. In FY26, $143,000 worth of commercial development approvals have been recorded, suggesting a predominantly residential focus. Compared to Greater Adelaide, One Tree Hill's building activity is significantly lower, at 88.0% below the regional average per person. This scarcity typically strengthens demand and prices for existing properties.

Nationally, activity is also lower, reflecting market maturity and possible development constraints. Recent building activity consists solely of standalone homes, preserving the area's low-density nature and attracting space-seeking buyers. The estimated population density, at 628 people per dwelling approval, reflects its quiet development environment. By 2041, One Tree Hill is projected to add 641 residents (AreaSearch quarterly estimate). If current development rates continue, housing supply may not keep pace with population growth, potentially increasing buyer competition and supporting stronger price growth.

One Tree Hill has emerging levels of nearby infrastructure activity, ranking in the 32ndth percentile nationally

Changes to local infrastructure significantly affect an area's performance. AreaSearch has identified 50 projects that could impact the region. Notable initiatives include Eyre Residential Development, Eyre Sports Park, Defence and Aerospace Precinct at Penfield, and Angle Vale Residential Growth Area. The following list details those most likely to be 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 essential services sectors well represented. Its unemployment rate is 0.9%, with an estimated employment growth of 1.6% over the past year. As of September 2025, 1,467 residents are employed, and the unemployment rate is 3.0% lower than Greater Adelaide's rate of 3.9%.

Workforce participation stands at 69.4%, compared to Greater Adelaide's 66.4%. According to Census responses, 12.6% of residents work from home, though Covid-19 lockdown impacts should be considered. Dominant employment sectors include construction, health care & social assistance, and education & training. Construction shows notable concentration with levels at 1.6 times the regional average.

Conversely, health care & social assistance has lower representation at 12.7% versus the regional average of 17.7%. The area offers limited local employment opportunities, as indicated by Census working population vs resident population count. Between September 2024 and September 2025, employment levels increased by 1.6%, and labour force increased by 1.3%, resulting in a unemployment fall of 0.3 percentage points. In comparison, Greater Adelaide recorded employment growth of 3.0%, labour force growth of 2.9%, with unemployment falling by 0.1 percentage points. Jobs and Skills Australia's national employment forecasts from May-25 can offer further insight into potential future demand within One Tree Hill. These projections estimate national employment expansion at 6.6% over five years and 13.7% over ten years, with varying growth rates between industry sectors. Applying these projections to One Tree Hill's employment mix suggests local employment should increase by 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

The One Tree Hill SA2 had a median taxpayer income of $53,348 and an average income of $58,797 in the latest postcode level ATO data aggregated by AreaSearch for financial year 2023. This is lower than national averages, with Greater Adelaide having a median income of $54,808 and an average income of $66,852. Based on Wage Price Index growth of 8.8% since financial year 2023, estimated incomes as of September 2025 would be approximately $58,043 (median) and $63,971 (average). According to Census 2021 income data, One Tree Hill's household incomes rank at the 82nd percentile with $2,277 weekly. The earnings profile shows that 34.0% of residents earn between $1,500 and $2,999 per week (858 people), similar to 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 dwellings were entirely houses at the latest Census. Adelaide metro had 75.2% houses and 24.9% other dwellings. Home ownership in One Tree Hill was 49.1%, with mortgaged dwellings at 46.7% and rented at 4.3%. The median monthly mortgage repayment was $1,995, higher than Adelaide metro's $1,562 and the Australian average of $1,863. Median weekly rent in One Tree Hill was $300, lower than Adelaide metro's $320 and the national figure of $375.

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

Family households constitute 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 comprise the remaining 12.4%, with lone person households at 10.8% and group households making up 1.2%. The median household size is 2.9 people, larger than the Greater Adelaide average of 2.5.

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

In One Tree Hill, residents aged 15+ have a higher proportion of university qualifications than the broader SA3 area benchmark. Specifically, 20.7% of residents hold such qualifications compared to the area's 10.2%. The area's educational advantage is evident in its strong showing for knowledge-based opportunities. Bachelor degrees are the most prevalent at 14.3%, followed by postgraduate qualifications (4.0%) and graduate diplomas (2.4%).

Vocational credentials are also prominent, with 41.7% of residents aged 15+ holding them. Advanced diplomas account for 11.6% of these credentials, while certificates make up the majority at 30.1%. Educational participation is notably high in One Tree Hill, 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.

No public transport data available for this catchment area.

One Tree Hill's residents are extremely healthy with both young and old age cohorts seeing low prevalence of common health conditions

Analysis of health metrics indicates robust performance across One Tree Hill. Mortality rates and prevalence of chronic conditions were low among both younger and older age groups, with arthritis and asthma being the most common medical conditions, affecting 9.3% and 7.3% of residents respectively. Approximately 68.9% of residents reported no medical ailments.

Private health cover was found to be relatively low at around 48%, compared to 52.7% in Greater Adelaide and a national average of 55.7%. Health outcomes among the working-age population were largely typical. The area had 18.7% of residents aged 65 and over, with health outcomes among seniors ranking broadly in line with the general population nationally.

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 June 2016, showed low cultural diversity with 79.2% of residents born in Australia, 92.8% being citizens, and 95.5% speaking English only at home. Christianity was the predominant religion, accounting for 46.3%, compared to 42.4% regionally (as of June 2016). The top three ancestral groups were English (34.9%), Australian (27.9%), and Scottish (7.1%).

Notably, Russian ancestry was higher at 0.9% versus 0.3% regionally, German at 6.4% vs 5.1%, and Dutch at 2.1% vs 1.2%.

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 median age of 38 years. The age profile shows that the 55-64 year-old group comprises 18.2% of the population, a figure considerably higher than both Greater Adelaide's percentage and Australia's national average of 11.2%. Meanwhile, the 25-34 year-old group makes up only 6.7% of One Tree Hill's population, which is smaller compared to Greater Adelaide. Between 2021 and the present, the age distribution has shifted: the 15-24 year-old group has grown from 13.7% to 15.5%, while the 35-44 year-old cohort increased from 10.9% to 12.4%. Conversely, the 45-54 year-old group has declined from 15.5% to 13.1%. Population forecasts for One Tree Hill indicate substantial demographic changes by 2041. The 45-54 year-old cohort is projected to grow by 58%, adding 192 residents and reaching a total of 523. In contrast, the 65-74 year-old cohort is expected to grow by a modest 6%, with an increase of just 18 people.