Sadleir

Sadleir has seen population growth performance typically on par with national averages when looking at short and medium term trends

As of November 2025, the estimated population for the suburb of Sadleir is around 3,295. This figure reflects an increase of 52 people since the 2021 Census, which reported a population of 3,243. The change was inferred from AreaSearch's estimate of the resident population at 3,273 as of June 2024, along with four validated new addresses since the Census date. This results in a population density ratio of approximately 3,661 persons per square kilometer, placing Sadleir in the upper quartile relative to other locations assessed by AreaSearch. Overseas migration contributed around 52.0% of overall population gains during recent periods for the suburb.

AreaSearch uses ABS/Geoscience Australia projections for each SA2 area released in 2024 with a base year of 2022, and NSW State Government's SA2-level projections released in 2022 with a base year of 2021 for areas not covered by the first data set. These projections indicate an above median population growth for statistical areas across the nation, with Sadleir expected to increase by 619 persons to reach approximately 3,914 by 2041, reflecting an overall increase of around 18.9% over the 17-year period.

The level of residential development activity in Sadleir is very low in comparison to the average area assessed nationally by AreaSearch

Based on AreaSearch analysis of ABS building approval numbers allocated from statistical area data, Sadleir has experienced around 4 dwellings receiving development approval per year. Over the past five financial years, between FY21 and FY25, approximately 24 homes have been approved, with a further 2 approved so far in FY26.

Despite population decline during this period, housing supply has remained adequate relative to demand, resulting in a balanced market with good buyer choice. New properties are constructed at an average value of $222,000, which is under regional levels, indicating more accessible housing choices for buyers. Compared to Greater Sydney, Sadleir has significantly less development activity, 93.0% below the regional average per person. This limited new supply generally supports stronger demand and values for established homes. However, construction activity has intensified recently. Nationally, this activity is also below average, reflecting the area's maturity and potentially pointing to planning constraints.

New building activity shows 67.0% standalone homes and 33.0% townhouses or apartments. This mix provides options across different price points, from family homes to more affordable compact living, marking a considerable change from the current housing mix of 85.0% houses. This shift reflects reduced availability of development sites and addresses shifting lifestyle demands and affordability requirements. With around 470 people per dwelling approval, Sadleir shows a developed market. Looking ahead, Sadleir is expected to grow by 622 residents through to 2041, according to the latest AreaSearch quarterly estimate. At current development rates, housing supply may struggle to match population growth, potentially heightening buyer competition and supporting price increases.

Sadleir has very high levels of nearby infrastructure activity, ranking in the top 10% nationally

Area infrastructure changes significantly influence performance. AreaSearch identified three projects impacting the area: Hurlstone Agricultural High School Redevelopment, Spring Square by Poly Bankstown, Busby Social Housing for Seniors, and Avala Apartments Miller. Relevant details are listed below.

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

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Employment drivers in Sadleir are experiencing difficulties, placing it among the bottom 20% of areas assessed across Australia

Sadleir's workforce spans white and blue collar jobs with manufacturing and industrial sectors well-represented. Its unemployment rate was 15.4% in the past year, showing an employment growth of 7.0%.

As of June 2025, Sadleir has 965 residents employed while its unemployment rate is 11.2%, which is 7.0 percentage points higher than Greater Sydney's rate of 4.2%. Workforce participation in Sadleir lags at 33.3% compared to Greater Sydney's 60.0%. Leading employment industries are health care & social assistance, retail trade, and manufacturing. Manufacturing has a significant share of employment at 2.2 times the regional level.

Conversely, professional & technical services have lower representation at 2.6%, compared to the regional average of 11.5%. Employment opportunities locally appear limited as indicated by Census data comparing working population to resident population. Over a 12-month period ending June 2025, employment increased by 7.0% while labour force grew by 4.8%, reducing unemployment by 1.7 percentage points. In contrast, Greater Sydney saw employment growth of 2.6% and labour force growth of 2.9%, with a slight rise in unemployment of 0.3 percentage points. Jobs and Skills Australia's national employment forecasts from Sep-22 project overall employment expansion by 6.6% over five years and 13.7% over ten years. Applying these projections to Sadleir's employment mix suggests local employment should increase by 5.8% over five years and 12.6% over ten years, though these are simple extrapolations for illustrative purposes and do not consider localized population projections.

Income metrics place the area in the bottom 10% of locations nationally according to AreaSearch analysis

AreaSearch's aggregation of ATO data for financial year 2022 shows Sadleir had a median taxpayer income of $38,586 and an average income of $44,763. These figures are below the national averages of $56,994 and $80,856 in Greater Sydney respectively. Based on Wage Price Index growth of 12.61% since financial year 2022, estimated median and average incomes for Sadleir as of September 2025 are approximately $43,452 and $50,408 respectively. The 2021 Census indicates that household, family, and personal incomes in Sadleir fall within the 1st to 2nd percentiles nationally. Income distribution shows that 28.5% of locals (939 people) earn between $400 - $799, differing from broader areas where the predominant income category is $1,500 - $2,999 at 30.9%. Economic conditions reveal financial pressure, with 42.2% of households having weekly budgets below $800. Housing affordability is severe, with only 73.8% of income remaining, ranking at the 3rd percentile nationally.

Sadleir is characterized by a predominantly suburban housing profile, with a higher proportion of rental properties than the broader region

The dwelling structure in Sadleir, as per the latest Census, consisted of 85.2% houses and 14.8% other dwellings (semi-detached, apartments, 'other' dwellings). In comparison, Sydney metro had 90.4% houses and 9.6% other dwellings. Home ownership in Sadleir was at 19.7%, with mortgaged dwellings at 25.9% and rented ones at 54.3%. The median monthly mortgage repayment in the area was $1,878, lower than Sydney metro's average of $2,475. The median weekly rent figure in Sadleir was $250, compared to Sydney metro's $490. Nationally, Sadleir's mortgage repayments were higher than the Australian average of $1,863, while rents were substantially lower at $375.

Sadleir has a typical household mix, with a lower-than-average median household size

Family households account for 69.8% of all households, including 30.2% couples with children, 11.9% couples without children, and 25.8% single parent families. Non-family households constitute the remaining 30.2%, with lone person households at 27.1% and group households comprising 2.8%. The median household size is 3.0 people, which is smaller than the Greater Sydney average of 3.4.

Sadleir faces educational challenges, with performance metrics placing it in the bottom quartile of areas assessed nationally

The area's university qualification rate is 9.5%, significantly lower than Greater Sydney's average of 38%. Bachelor degrees are the most common at 7.2%, followed by postgraduate qualifications (1.8%) and graduate diplomas (0.5%). Vocational credentials are prevalent, with 31.8% of residents aged 15+ holding them, including advanced diplomas (10.0%) and certificates (21.8%). Educational participation is high at 36.5%, comprising primary education (13.9%), secondary education (11.7%), and tertiary education (4.8%).

Sadleir Public School serves the area, with an enrollment of 315 students as of its establishment in 2005. It focuses on primary education, with ICSEA score of 883 indicating varied educational conditions. Secondary options are available in surrounding areas. School places per 100 residents stand at 9.6, below the regional average of 19.0, suggesting some students may attend schools outside Sadleir.

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

Sadleir has 16 operational public transport stops. These are served by 17 different bus routes, offering a total of 962 weekly passenger trips. The average distance from residents to the nearest stop is 143 meters.

On average, there are 137 trips per day across all routes, which translates to around 60 weekly trips per individual stop.

Health performance in Sadleir is lower than average with common health conditions somewhat prevalent across the board, though to a considerably higher degree among older age cohorts

Sadleir faces significant health challenges with common health conditions being somewhat prevalent across all age groups but to a considerably higher degree among older age cohorts. The rate of private health cover is extremely low at approximately 45% of the total population (~1,473 people), compared to 52.5% across Greater Sydney and the national average of 55.3%. The most common medical conditions in the area are asthma and arthritis, impacting 8.8 and 8.7% of residents respectively, while 68.3% declare themselves completely clear of medical ailments compared to 77.9% across Greater Sydney.

The area has 13.4% of residents aged 65 and over (441 people), which is higher than the 10.1% in Greater Sydney. Health outcomes among seniors present some challenges requiring more attention than the broader population.

Sadleir is among the most culturally diverse areas in the country based on AreaSearch assessment of a range of language and cultural background related metrics

Sadleir has a high cultural diversity, with 39.9% of its population born overseas and 57.3% speaking a language other than English at home. Christianity is the main religion in Sadleir, making up 36.5% of people. However, Islam is overrepresented at 29.4%, significantly higher than the Greater Sydney average of 12.9%.

The top three ancestry groups are Other (20.8%), Australian (19.6%), and English (12.7%). Notably, Lebanese ethnicity is overrepresented at 12.7% compared to the regional average of 4.0%, Vietnamese at 11.5% versus 4.4%, and Samoan at 2.6% compared to 1.5%.

Sadleir's young demographic places it in the bottom 15% of areas nationwide

Sadleir's median age is 33, which is younger than Greater Sydney's figure of 37 and Australia's national average of 38 years. Compared to Greater Sydney, Sadleir has a higher proportion of residents aged 15-24 (17.2%) but fewer residents aged 25-34 (11.1%). Between the 2021 Census and now, the 15-24 age group has increased from 15.7% to 17.2%, while the 65-74 cohort has grown from 6.5% to 7.6%. Conversely, the 25-34 age group has decreased from 12.2% to 11.1%. By 2041, population forecasts indicate significant demographic changes in Sadleir. The 15-24 cohort is projected to grow by 23%, adding 129 residents to reach a total of 696. Meanwhile, both the 0-4 and 35-44 age groups are expected to decrease in number.