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 was 2,473 as of May 2021. By May 2026, it had increased to around 2,522 people, a rise of 49 individuals (2.0%). This growth is inferred from the estimated resident population of 2,520 in June 2025 and an additional 10 validated new addresses since May 2021. The population density was 19.4 persons per square kilometer by May 2026. Overseas migration contributed approximately 88.5% of overall population gains during recent periods.

AreaSearch adopted 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 were used, released in 2023 based on 2021 data. By 2041, One Tree Hill is projected to have a population of 3,155 people, reflecting an increase of 682 persons from the May 2026 figure. This represents a growth rate of approximately 27.1% over the 15-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. Over the past five financial years, from FY21 to FY25, 28 homes received approval, with three more approved so far in FY26. Each year, an average of 1.3 new residents per dwelling constructed was recorded between FY21 and FY25.

This indicates a balanced supply and demand market, supporting stable conditions. The average construction cost value for new properties is $403,000, suggesting a focus on the premium segment with upmarket properties. In FY26, $143,000 in commercial development approvals have been recorded, predominantly reflecting residential focus. Compared to Greater Adelaide, One Tree Hill's building activity is 87.0% below the regional average per person, typically strengthening demand and prices for existing properties due to scarcity of new dwellings. This lower activity also reflects market maturity and possible development constraints nationally.

Recent building activity consists solely of standalone homes, preserving the area's low density nature with detached housing attracting space-seeking buyers. The estimated population per dwelling approval is 628 people in the area. Future projections estimate One Tree Hill to add 631 residents by 2041 (AreaSearch quarterly estimate). 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 36thth percentile nationally

The performance of an area can significantly be influenced by changes in local infrastructure, major projects, and planning initiatives. A total of 48 such projects have been identified by AreaSearch as potentially impacting the area. Notable projects include Eyre Residential Development, Eyre Sports Park, Defence and Aerospace Precinct at Penfield, and Angle Vale Residential Growth Area, with the following list highlighting those most likely to be relevant.

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

Denotes AI-based impression for illustrative purposes only, not to be taken as definitive under any circumstances. Please follow links and conduct other investigations from the project's source for actual imagery. Developers and project owners wishing us to use original imagery please Contact Us and we will do so.

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 1.0% and it experienced an estimated employment growth of 1.2% over the past year. As of December 2025, 1,466 residents are employed, with an unemployment rate of 2.8%, below Greater Adelaide's rate of 3.8%.

Workforce participation is at 69.2%, compared to Greater Adelaide's 66.0%. According to Census responses, only 12.6% of residents work from home. The dominant employment sectors are construction, health care & social assistance, and education & training. Construction shows notable concentration with levels at 1.6 times the regional average.

Health care & social assistance has lower representation at 12.7%, compared to the regional average of 17.7%. Local employment opportunities appear limited based on Census working population vs resident population comparison. Between December 2024 and December 2025, employment levels increased by 1.2% and labour force grew by 1.0%, reducing unemployment by 0.1 percentage points. In contrast, Greater Adelaide recorded employment growth of 4.2%, labour force growth of 3.9%, and a reduction in unemployment of 0.3 percentage points. Jobs and Skills Australia's national employment forecasts from May-25 indicate potential future demand within One Tree Hill. These projections suggest national employment will expand by 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 indicates 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, contrasting with Greater Adelaide's median income of $54,808 and average income of $66,852. Based on Wage Price Index growth of 10.17% since financial year 2023, current estimates would be approximately $58,773 (median) and $64,777 (average) as of March 2026. According to Census 2021 income data, household incomes rank at the 82nd percentile with a weekly income of $2,277. The earnings profile shows that 34.0% of residents (857 people) fall within the $1,500 - 2,999 income bracket, 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 structures, as per the latest Census, were entirely houses with no other dwellings. This contrasts with Adelaide metro's mix of 75.2% houses and 24.9% other dwellings. Home ownership in One Tree Hill stood at 49.1%, while mortgaged dwellings accounted for 46.7% and rented ones made up 4.3%. The median monthly mortgage repayment was $1,995, higher than Adelaide metro's average of $1,562. Weekly rent in One Tree Hill was recorded at $300, compared to Adelaide metro's $320. 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, consisting of 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% of the total. 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 and above have a notably high level of educational attainment, with 20.7% holding university qualifications compared to the broader SA3 area's 10.2%. This significant educational advantage is driven by bachelor degrees (14.3%), postgraduate qualifications (4.0%), and graduate diplomas (2.4%). Vocational credentials are also prevalent, with 41.7% of residents holding such qualifications, including advanced diplomas (11.6%) and certificates (30.1%). Educational participation is notably high, with 26.4% of residents currently enrolled in formal education, comprising 9.8% in primary, 8.1% in secondary, and 5.0% pursuing tertiary education.

Educational participation is notably 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.

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, as per AreaSearch's evaluation of mortality rates and chronic condition prevalence. Both younger and older age groups exhibited low prevalence of common health conditions. Private health cover was found to be quite low at approximately 48% of the total population (around 1,220 people), compared to Greater Adelaide's 52.7%.

Nationally, the average is 55.7%. The most prevalent medical conditions were arthritis and asthma, affecting 9.3 and 7.3% of residents respectively. Notably, 68.9% reported being completely free from medical ailments, compared to Greater Adelaide's 67.9%. Health outcomes among working-age individuals are generally typical. The area has 19.6% of residents aged 65 and over (495 people). Senior health outcomes are particularly strong, aligning with national rankings for the general population.

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 population with 79.2% born in Australia, 92.8% being citizens, and 95.5% speaking English only at home. Christianity was the predominant religion, comprising 46.3%, compared to 42.4% across Greater Adelaide (surveyed in June 2017). The top three ancestry groups were English (34.9%), Australian (27.9%), and Scottish (7.1%).

Notably, Russian (0.9%) and German (6.4%) populations were higher than regional averages of 0.3% and 5.1%, respectively, while Dutch (2.1%) was slightly above the regional average of 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 and Australia's national average of 38 years. The age profile shows that individuals aged 55-64 are particularly prominent, making up 18.1% of the population, while those aged 25-34 make up only 6.6%. This is notably higher than the national average of 11.2% for the 55-64 age group. Since 2021, the 15 to 24 age group has increased from 13.7% to 15.8%, and the 75 to 84 cohort has grown from 5.1% to 6.6%. Conversely, the 45 to 54 age group has declined from 15.5% to 12.6%. By 2041, population forecasts indicate substantial demographic changes for One Tree Hill. The 45 to 54 cohort is projected to grow by 57%, adding 181 residents to reach a total of 499. Meanwhile, the 65 to 74 cohort is expected to grow by a modest 6%, with an increase of 17 people.