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

Based on AreaSearch's analysis, One Tree Hill's population is around 2,525 as of Feb 2026. This reflects an increase of 52 people (2.1%) since the 2021 Census, which reported a population of 2,473 people. The change is inferred from the estimated resident population of 2,523 from the ABS as of June 2024 and an additional 10 validated new addresses since the Census date. This population level equates to a density ratio of 19.4 persons per square kilometer, providing ample space per person. Population growth for the area was primarily driven by overseas migration, which contributed approximately 52.0% of overall population gains during recent periods, although all drivers, including interstate migration and natural growth, were positive factors.

AreaSearch adopts ABS/Geoscience Australia projections for each SA2 area, as released in 2024 with 2022 as the base year. For any SA2 areas not covered by this data, and for years post-2032, the SA State Government's Regional/LGA projections by age category, released in 2023 and based on 2021 data, are adopted with adjustments made employing a method of weighted aggregation of population growth from LGA to SA2 levels. Looking at population projections moving forward, a significant population increase in the top quartile of national areas is forecast, with the area expected to grow by 643 persons to 2041 based on the latest annual ERP population numbers, reflecting an increase of 25.4% in total 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 around 5 dwellings receiving development approval each year, with 28 homes approved over the past 5 financial years (between FY-21 and FY-25) and 4 so far in FY-26. Given an average of 1.3 new residents per year per dwelling constructed over the past 5 financial years (between FY-21 and FY-25), the market shows a good balance between supply and demand, supporting stable conditions, while new properties are constructed at an average value of $403,000, demonstrating a developer focus on the premium segment with upmarket properties. Additionally, $143,000 in commercial development approvals have been recorded this financial year, suggesting a predominantly residential focus.

Compared to Greater Adelaide, One Tree Hill records markedly lower building activity (88.0% below regional average per person). This scarcity of new dwellings typically strengthens demand and prices for existing properties. This activity is likewise lower than nationally, reflecting market maturity and pointing to possible development constraints. Meanwhile, 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 count of 628 people in the area per dwelling approval reflects its quiet, low activity development environment.

Future projections show One Tree Hill adding 641 residents by 2041 (from the latest 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 32ndth percentile nationally

Nothing can influence an area's performance as much as changes to local infrastructure, major projects, and planning initiatives. In total 50 projects have been identified by AreaSearch that are likely to have an impact on the area. Key projects include Eyre Residential Development, Eyre Sports Park, Defence and Aerospace Precinct at Penfield, and Angle Vale Residential Growth Area, with the list below detailing those likely to be of most relevance.

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 possesses a skilled workforce, with essential services sectors well represented, an unemployment rate of just 1.0%, and 1.2% in estimated employment growth over the past year. As of December 2025, 1,466 residents are in work while the unemployment rate is 2.8% below Greater Adelaide's rate of 3.8%, and workforce participation is fairly standard (69.4% compared to Greater Adelaide's 67.2%). Based on Census responses, a low 12.6% of residents were found to work from home, though Covid-19 lockdown impacts should be considered.

The dominant employment sectors among residents include construction, health care & social assistance, and education & training. The area demonstrates a particularly notable concentration in construction, with employment levels at 1.6 times the regional average. Conversely, health care & social assistance shows lower representation at 12.7% versus the regional average of 17.7%. The area appears to offer limited employment opportunities locally, as indicated by the count of the Census working population versus the resident population.

Based on AreaSearch analysis of SALM and ABS data, during the year to December 2025, employment levels increased by 1.2% and the labour force increased by 1.0%, resulting in unemployment falling by 0.1 percentage points. By comparison, Greater Adelaide recorded employment growth of 4.2% and labour force growth of 3.9%, with unemployment falling 0.3 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, covering five and ten-year periods, have been mapped against the local employment profile to estimate growth patterns. While national employment is forecast to expand by 6.6% over five years and 13.7% over ten years, growth rates differ significantly between industry sectors. Applying these industry-specific 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 (please note this is a simple weighting extrapolation for illustrative purposes and does not take into account localised population projections).

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

The One Tree Hill SA2 shows a median taxpayer income of $53,348 and an average of $58,797 according to the latest postcode level ATO data aggregated by AreaSearch for FY-23. This is lower than average on a national basis, contrasting with Greater Adelaide's median income of $54,808 and average income of $66,852. Based on Wage Price Index growth of 8.8% since FY-23, current estimates would be approximately $58,043 (median) and $63,971 (average) as of September 2025. Census 2021 income data shows household incomes rank exceptionally at the 82nd percentile ($2,277 weekly). The earnings profile shows the $1,500 - 2,999 bracket dominates with 34.0% of residents (858 people), aligning with regional levels where this cohort likewise represents 31.8%. One Tree Hill demonstrates considerable affluence with 32.8% earning over $3,000 per week, supporting premium retail and service offerings. After housing costs, residents retain 90.0% of income, reflecting strong purchasing power and 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

Dwelling structure within One Tree Hill, as evaluated at the latest Census, comprised 100.0% houses and 0.0% other dwellings (semi-detached, apartments, 'other' dwellings), in comparison to Adelaide metro's 75.2% houses and 24.9% other dwellings. Meanwhile, the level of home ownership within One Tree Hill was well beyond that of Adelaide metro, at 49.1%, with the remainder of dwellings either mortgaged (46.7%) or rented (4.3%). The median monthly mortgage repayment in the area was well above the Adelaide metro average at $1,995, while the median weekly rent figure was recorded at $300, compared to Adelaide metro's $1,562 and $320. Nationally, One Tree Hill's mortgage repayments are higher than the Australian average of $1,863, while rents are substantially below the national figure of $375.

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

Family households dominate at 87.6% of all households, comprising 44.1% couples with children, 38.1% couples without children, and 5.4% single parent families. Non-family households make up the remaining 12.4%, with lone person households at 10.8% and group households comprising 1.2% of the total. The median household size of 2.9 people is 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

Educational attainment in One Tree Hill significantly surpasses broader benchmarks, with 20.7% of residents aged 15+ holding university qualifications compared to 10.2% in the SA3 area. This substantial educational advantage positions the area strongly for knowledge-based opportunities. Bachelor degrees lead at 14.3%, followed by postgraduate qualifications (4.0%) and graduate diplomas (2.4%). Trade and technical skills feature prominently, with 41.7% of residents aged 15+ holding vocational credentials, including advanced diplomas (11.6%) and certificates (30.1%).

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 shows strong performance throughout One Tree Hill, based on AreaSearch's assessment of mortality rates and chronic condition prevalence. Both young and old age cohorts see low prevalence of common health conditions, while the rate of private health cover is low at approximately 48% of the total population (~1,222 people). This compares to 52.7% across Greater Adelaide and a national average of 55.7%.

The most common medical conditions in the area are arthritis and asthma, impacting 9.3% and 7.3% of residents, respectively, while 68.9% declared themselves as completely clear of medical ailments compared to 67.9% across Greater Adelaide. Health outcomes among the working-age population are broadly typical. The area has 18.7% of residents aged 65 and over (471 people). Health outcomes among seniors are particularly strong, with national rankings broadly in line with 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 was found to be below average in terms of cultural diversity, with 79.2% of its population born in Australia, 92.8% being citizens, and 95.5% speaking English only at home. The main religion in One Tree Hill is Christianity, which makes up 46.3% of the population, compared to 42.4% across Greater Adelaide.

In terms of ancestry (country of birth of parents), the top three represented groups in One Tree Hill are English, comprising 34.9% of the population (substantially higher than the regional average of 27.8%), Australian, comprising 27.9% of the population (substantially higher than the regional average of 22.8%), and Scottish, comprising 7.1% of the population. Additionally, there are notable divergences in the representation of other ethnic groups: Russian is overrepresented at 0.9% in One Tree Hill (vs 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

At 46 years, One Tree Hill's median age is significantly above the Greater Adelaide average of 39 and similarly considerably older than Australia's 38 years. The age profile shows 55 - 64 year-olds are particularly prominent (18.2%), while the 25 - 34 group is comparatively smaller (6.7%) than in Greater Adelaide. This 55 - 64 concentration is well above the national 11.2%. In the period since 2021, the 15 to 24 age group has grown from 13.7% to 15.5% of the population, while the 35 to 44 cohort increased from 10.9% to 12.4%. Conversely, the 45 to 54 cohort has declined from 15.5% to 13.1%. Population forecasts for 2041 indicate substantial demographic changes for One Tree Hill. The 45 to 54 cohort shows the strongest projected growth at 58%, adding 192 residents to reach 523. Meanwhile, the 65 to 74 cohort grows by a modest 6% (18 people).