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

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 are adopted, based on 2021 data and adjusted using weighted aggregation methods from LGA to SA2 levels. Future population projections indicate significant growth in top quartile national areas; One Tree Hill is expected to grow by 643 persons to 2041, reflecting a total increase of 25.1% over the 17-year period based on latest annual ERP population numbers.

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 were approved, with an additional two approved so far in FY26. On average, each dwelling constructed over these years attracted 1.3 new residents per year.

This balance between supply and demand supports stable market conditions. The average construction cost of new properties was $403,000, indicating a focus on the premium segment with upmarket properties. In FY26, commercial development approvals totaled $143,000, suggesting a predominantly residential focus. Compared to Greater Adelaide, One Tree Hill's building activity is 88.0% 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 national trends, pointing to 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 per dwelling approval is 628 people, reflecting its quiet, low activity development environment. According to AreaSearch's latest quarterly estimate, One Tree Hill is projected to 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 limited levels of nearby infrastructure activity, ranking in the 16thth percentile nationally

Changes to local infrastructure significantly influence an area's performance. AreaSearch has identified 51 projects that could impact the area. Major ones include Eyre Residential Development, Eyre Sports Park, Defence and Aerospace Precinct at Penfield, Angle Vale Residential Growth Area. The following details those likely to be 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 its essential services sectors well represented. The unemployment rate is 0.9%, with an estimated employment growth of 1.6% over the past year.

As of September 2025, there are 1,467 residents employed while the unemployment rate is 3.0% lower than Greater Adelaide's rate of 3.9%. Workforce participation stands at 66.2%, compared to Greater Adelaide's 61.7%. The dominant employment sectors among residents include construction, health care & social assistance, and education & training. Construction shows notable concentration with employment levels at 1.6 times the regional average.

Conversely, health care & social assistance has 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. Between September 2024 and September 2025, employment levels increased by 1.6%, labour force grew by 1.3%, resulting in a decrease in unemployment by 0.3 percentage points. In comparison, Greater Adelaide recorded employment growth of 3.0% with unemployment falling by 0.1 percentage points. State-level data from 25-Nov shows SA employment grew by 1.19% year-on-year, adding 10,710 jobs, and the state unemployment rate is at 4.0%. This compares favourably to the national unemployment rate of 4.3%, with SA's employment growth outpacing the national average of 0.14%. Jobs and Skills Australia's national employment forecasts from May-25 offer further insight into potential future demand within One Tree Hill. These projections suggest national employment should expand by 6.6% over five years and 13.7% over ten years, with growth rates varying significantly between industry sectors. Applying these projections to One Tree Hill's employment mix suggests local employment should increase by 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

The One Tree Hill SA2 had a median taxpayer income of $51,108 and an average income of $56,363 in financial year 2022. This is lower than the national average, with Greater Adelaide having a median income of $52,592 and an average income of $64,886. By September 2025, estimates suggest the median income will be approximately $57,665 and the average income will be around $63,594, based on a 12.83% increase since financial year 2022. According to Census 2021 data, One Tree Hill's household incomes rank at the 82nd percentile with an income of $2,277 per week. The earnings profile shows that 34.0% of residents (860 people) earn between $1,500 and $2,999 weekly, which aligns with regional levels where this cohort represents 31.8%. One Tree Hill demonstrates affluence with 32.8% earning over $3,000 per week. After housing costs, residents retain 90.0% of their 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

One Tree Hill's dwelling structure, as per the latest Census, consisted entirely of houses with no other dwellings. This contrasts with Adelaide metro's 83.7% houses and 16.2% other dwellings. Home ownership in One Tree Hill stood at 49.1%, with mortgaged dwellings at 46.7% and rented ones at 4.3%. The median monthly mortgage repayment was $1,995, higher than Adelaide metro's average of $1,300. Median weekly rent in One Tree Hill was $300, compared to Adelaide metro's $265. Nationally, One Tree Hill's mortgage repayments were higher at $1,995 against the Australian average of $1,863, while rents were lower at $300 versus 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 at 1.2%. The median household size is 2.9 people, which is 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 higher than broader benchmarks. Specifically, 20.7% of residents aged 15 years and above hold university qualifications, compared to the SA3 area average of 10.2%. This educational advantage positions the area favourably for knowledge-based opportunities. Bachelor degrees are most prevalent at 14.3%, followed by postgraduate qualifications (4.0%) and graduate diplomas (2.4%).

Trade and technical skills are also prominent, with 41.7% of residents aged 15 years and above holding vocational credentials – advanced diplomas (11.6%) and certificates (30.1%). Educational participation is notably high in the area, 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 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' health data shows relatively positive outcomes with common conditions seen across both young and old age groups. The rate of private health cover is very low at approximately 48% (~1,214 people), compared to the national average of 55.3%.

The most common medical conditions are arthritis (9.3%) and asthma (7.3%). A total of 68.9% of residents declared themselves completely clear of medical ailments, compared to 63.4% across Greater Adelaide. In One Tree Hill, 18.7% of residents are aged 65 and over (472 people), higher than the 13.3% in Greater Adelaide. Health outcomes among seniors are particularly strong, performing better than 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, as per the census conducted on June 28, 2011, exhibited lower cultural diversity with 79.2% of its population born in Australia. Of this population, 92.8% were Australian citizens and 95.5% spoke English only at home. Christianity was the predominant religion in One Tree Hill, comprising 46.3% of the population, compared to 36.7% across Greater Adelaide.

The top three ancestry groups based on country of birth of parents were English (34.9%), Australian (27.9%), and Scottish (7.1%). Notably, Russian ancestry was overrepresented in One Tree Hill at 0.9%, compared to the regional average of 0.3%. Similarly, German ancestry stood at 6.4% versus 4.4% regionally, and Dutch ancestry was at 2.1% compared to 1.3% across Greater Adelaide.

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 comprise only 6.5%. This concentration of 55-64 year-olds is well above the national average of 11.2%. Between 2021 and present, the 15 to 24 age group has increased from 13.7% to 15.3%, while the 35 to 44 cohort has grown from 10.9% to 12.1%. Conversely, the 45 to 54 age group has decreased from 15.5% to 13.5%. Population forecasts for the year 2041 indicate significant demographic changes in One Tree Hill. The 45 to 54 age cohort is projected to grow by 53%, adding 182 residents to reach a total of 523. Meanwhile, the 65 to 74 age cohort is expected to grow by a modest 3%, with an increase of 8 people.