Tea Tree Gully

Population growth drivers in Tea Tree Gully are slightly above average based on AreaSearch's ranking of recent, and medium term trends

As of Feb 2026, the population of the suburb of Tea Tree Gully is estimated at around 3,635, reflecting an increase of 136 people since the 2021 Census. This increase represents a 3.9% growth from the previous population count of 3,499. The change was inferred from AreaSearch's estimation of the resident population at 3,501 following examination of the latest ERP data release by the ABS in June 2024, along with an additional 24 validated new addresses since the Census date. This results in a population density ratio of 763 persons per square kilometer, which is relatively consistent with averages seen across locations assessed by AreaSearch. Over the past decade, from 2011 to 2021, Tea Tree Gully has demonstrated resilient growth patterns with an average annual growth rate of 0.7%. This growth outpaced the SA3 area during this period.

The primary driver for population growth was overseas migration, contributing approximately 86.0% of overall population gains. AreaSearch adopts ABS/Geoscience Australia projections for each SA2 area, as 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. These projections were released in 2023 and based on 2021 data, with adjustments made employing a method of weighted aggregation of population growth from LGA to SA2 levels. Looking ahead, population projections for Tea Tree Gully indicate an increase just below the median of statistical areas analysed by AreaSearch. Based on aggregated SA2-level projections, the suburb is expected to grow by 350 persons by 2041, reflecting an increase of 7.8% in total over the 17-year period.

AreaSearch analysis of residential development drivers sees Tea Tree Gully recording a relatively average level of approval activity when compared to local markets analysed countrywide

AreaSearch analysis of ABS building approval numbers shows Tea Tree Gully has recorded around 16 residential properties granted approval per year. Over the past five financial years, from FY-21 to FY-25, approximately 84 homes were approved, with another 8 approved so far in FY-26. This results in an average of about 1.4 new residents per year per dwelling constructed over these five years.

The average construction value for new dwellings is around $320,000. In comparison, there have been $276,000 in commercial approvals this financial year, indicating a predominantly residential focus. Tea Tree Gully maintains similar construction rates per person relative to Greater Adelaide, suggesting balanced market dynamics.

New development consists of 82.0% standalone homes and 18.0% townhouses or apartments, preserving the area's low density nature with an emphasis on detached housing attracting space-seeking buyers. The location has approximately 162 people per dwelling approval, indicating a low density market. Looking ahead, Tea Tree Gully is expected to grow by 284 residents through to 2041, based on the latest AreaSearch quarterly estimate. With current construction levels, housing supply should adequately meet demand, creating favourable conditions for buyers while potentially enabling growth that exceeds current forecasts.

Tea Tree Gully has emerging levels of nearby infrastructure activity, ranking in the 27thth percentile nationally

No infrastructure projects were identified by AreaSearch that could impact the area. Key projects include Tea Tree Gully Sustainable Sewers Program, Golden Grove Neighbourhood Code Amendment, Northern Adelaide Transport Study, and Northern Adelaide Irrigation Scheme (NAIS).

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AreaSearch analysis reveals Tea Tree Gully significantly outperforming the majority of regions assessed nationwide

Tea Tree Gully has a skilled workforce with well-represented essential services sectors. The unemployment rate was 2.2% in the past year, with an estimated employment growth of 1.3%. As of September 2025, 1,913 residents were employed, with an unemployment rate of 1.7%, below Greater Adelaide's rate of 3.9%.

Workforce participation was at par with Greater Adelaide's 66.4%. According to Census responses, 9.7% of residents worked from home, considering Covid-19 lockdown impacts. The dominant employment sectors were health care & social assistance, construction, and education & training. Tea Tree Gully showed strong specialization in construction, with an employment share 1.3 times the regional level.

However, health care & social assistance was under-represented at 15.9% compared to Greater Adelaide's 17.7%. The area appeared to offer limited local employment opportunities based on Census data comparison of working population and resident population. Between September 2024 and September 2025, employment increased by 1.3%, while labour force grew by 1.2%, keeping the unemployment rate relatively stable. In contrast, Greater Adelaide saw employment grow by 3.0% and labour force expand by 2.9%, with a fall in unemployment of 0.1 percentage points. Jobs and Skills Australia's national employment forecasts from May-25 projected national employment growth at 6.6% over five years and 13.7% over ten years, with varying rates across sectors. Applying these projections to Tea Tree Gully's employment mix suggested local employment should increase by 6.5% over five years and 13.5% over ten years, based on a simple weighting extrapolation for illustrative purposes.

Income levels align closely with national averages, indicating typical economic conditions for Australian communities according to AreaSearch analysis

The suburb of Tea Tree Gully had a lower than average national income level based on latest ATO data aggregated by AreaSearch for financial year 2023. Its median income among taxpayers was $56,490 and the average income stood at $63,430. This compares to Greater Adelaide's figures of $54,808 and $66,852 respectively. Based on Wage Price Index growth of 8.8% since financial year 2023, current estimates would be approximately $61,461 (median) and $69,012 (average) as of September 2025. According to 2021 Census figures, household, family and personal incomes in Tea Tree Gully ranked modestly between the 41st and 49th percentiles. Income distribution showed that the $1,500 - $2,999 bracket dominated with 31.7% of residents (1,152 people), similar to the broader area where 31.8% occupied this bracket. Housing costs were manageable with 86.9% retained. However, disposable income was below average at the 46th percentile and the area's SEIFA income ranking placed it in the 6th decile.

Tea Tree Gully is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership

The dwelling structure in Tea Tree Gully, as per the latest Census, consisted of 90.1% houses and 9.9% other dwellings (semi-detached, apartments, 'other' dwellings), compared to Adelaide metro's 75.2% houses and 24.9% other dwellings. Home ownership in Tea Tree Gully stood at 41.2%, with the rest being mortgaged (44.4%) or rented (14.4%). The median monthly mortgage repayment was $1,600, higher than Adelaide metro's average of $1,562. The median weekly rent was $325, similar to Adelaide metro's figure of $320. Nationally, Tea Tree Gully's mortgage repayments were lower at $1,600 compared to the Australian average of $1,863, and rents were also lower at $325 compared to the national figure of $375.

Tea Tree Gully has a typical household mix, with a fairly typical median household size

Family households constitute 74.7% of all households, broken down into 32.2% couples with children, 31.3% couples without children, and 10.4% single parent families. Non-family households comprise the remaining 25.3%, with lone person households at 23.1% and group households making up 2.4%. The median household size is 2.5 people, aligning with the Greater Adelaide average.

The educational profile of Tea Tree Gully exceeds national averages, with above-average qualification levels and academic performance metrics

Educational qualifications in Tea Tree Gully trail regional benchmarks, with 23.8% of residents aged 15+ holding university degrees compared to the national average of 30.4%. Bachelor degrees are the most prevalent at 16.3%, followed by postgraduate qualifications (4.7%) and graduate diplomas (2.8%). Vocational credentials are also prominent, with 38.1% of residents aged 15+ holding such qualifications – advanced diplomas account for 11.1%, while certificates make up 27.0%. Educational participation is notably high in Tea Tree Gully, with 25.4% of residents currently enrolled in formal education.

This includes 9.2% in primary education, 6.2% in secondary education, and 5.2% pursuing tertiary education.

Transport servicing is good compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

Transport analysis shows 22 active public transport stops in Tea Tree Gully, all bus stops. These are served by 8 routes offering a total of 798 weekly passenger trips. Residents have excellent access to transport, with an average distance of 188 meters to the nearest stop. Most residents commute outwards from this residential area. Cars are the primary mode of transport at 87%, with buses used by 10%. On average, there are 1.5 vehicles per dwelling.

According to the 2021 Census, only 9.7% of residents work from home, which may be influenced by COVID-19 conditions. Bus services operate an average of 114 trips daily across all routes, equating to approximately 36 weekly trips per stop.

Tea Tree Gully's residents are healthier than average in comparison to broader Australia with prevalence of common health conditions quite low across both younger and older age cohorts

Health data for Tea Tree Gully shows positive outcomes, with mortality rates and health conditions largely matching national benchmarks.

The prevalence of common health issues is low across both younger and older age groups. Private health cover stands at approximately 52% of the total population (~1,893 people), slightly lower than the average SA2 area. The most prevalent medical conditions are arthritis (9.3%) and mental health issues (8.4%), with 66.1% of residents reporting no medical ailments, compared to 67.9% in Greater Adelaide. Health outcomes among working-age residents are typical. The area has a higher proportion of seniors aged 65 and over at 23.2%, compared to Greater Adelaide's 19.3%. Health outcomes among seniors are above average, aligning with national rankings for the general population.

Tea Tree Gully ranks below the Australian average when compared to other local markets across a number of language and cultural background related metrics

Tea Tree Gully, as per the census conducted on 29th August 2016, showed a lower level of cultural diversity compared to the average. A significant majority, 79.1%, were born in Australia, with 92.1% being citizens and 93.3% speaking English only at home. Christianity was the predominant religion, accounting for 45.6% of the population.

However, there was an overrepresentation in the 'Other' category, comprising 1.3%, compared to Greater Adelaide's 1.8%. The top three ancestry groups were English (33.9%), Australian (25.9%), and Scottish (6.9%). Notably, German ancestry was higher at 6.6% than the regional average of 5.1%, Welsh at 0.8% compared to 0.6%, and Russian at 0.5% compared to 0.3%.

Tea Tree Gully hosts a notably older demographic compared to the national average

The median age in Tea Tree Gully as of 2021 was 44 years, which is higher than Greater Adelaide's average of 39 years and also above the Australian median of 38 years. Compared to the Greater Adelaide average, the 75-84 age cohort was notably over-represented in Tea Tree Gully at 9.3%, while the 25-34 age group was under-represented at 11.5%. Between the 2016 and 2021 censuses, the population of Tea Tree Gully aged 35 to 44 grew from 12.3% to 13.8%, while the 45 to 54 cohort declined from 13.5% to 12.0% and the 65 to 74 group decreased from 12.4% to 11.3%. Population forecasts for Tea Tree Gully in 2041 indicate significant demographic changes, with the 85+ age cohort projected to grow by 88 people (94%), from 94 to 183, while the 55 to 64 cohort is projected to remain unchanged at 0 people.