Sadleir

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

As of May 2026, the estimated population of the suburb of Sadleir is around 3,315 people. This figure reflects an increase of 72 individuals since the 2021 Census, which reported a population of 3,243. The change is inferred from AreaSearch's estimation based on the latest ERP data release by the ABS in June 2025 and 11 validated new addresses since the Census date. This results in a population density ratio of 3,683 persons per square kilometer, placing Sadleir in the upper quartile relative to national locations assessed by AreaSearch. Overseas migration contributed approximately 52.0% of overall population gains during recent periods.

AreaSearch adopts ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered by this data, AreaSearch uses the NSW State Government's SA2 level projections, released in 2022 with a base year of 2021. Growth rates by age group from these aggregations are applied to all areas for years 2032 to 2041. Based on aggregated SA2-level projections, Sadleir is expected to increase by 597 persons to the year 2041, reflecting an overall increase of 18.0% over the 16-year period.

AreaSearch assessment of residential development drivers sees a low level of activity in Sadleir, placing the area among the bottom 25% of areas assessed nationally

AreaSearch analysis reveals Sadleir had around 8 dwelling approvals per year. Between FY21-FY25, approximately 41 homes were approved, with another 10 in FY26 so far. Despite population decline, housing supply has been adequate relative to demand, maintaining a balanced market with diverse buyer choices.

New properties' average construction cost is $222,000, below regional levels. This year, Sadleir registered $303,000 in commercial approvals, indicating its residential nature. Compared to Greater Sydney, Sadleir shows significantly reduced construction (87.0% below the regional average per person). New development consists of 64.0% detached houses and 36.0% medium-high density housing, shifting from the current 85.0% houses dominance. With around 327 people per dwelling approval, Sadleir exhibits low-density characteristics. By 2041, AreaSearch estimates Sadleir's population will grow by 597 residents.

At current development rates, housing supply may struggle to keep pace with population growth, potentially intensifying 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 local performance. AreaSearch identified three major projects likely impacting the area: Hurlstone Agricultural High School Upgrade, Spring Square by Poly Bankstown, Avala Apartments Miller, and Busby Social Housing for Seniors. These are detailed below as they're most relevant.

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

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AreaSearch assessment indicates Sadleir faces employment challenges relative to the majority of Australian markets

Sadleir has a balanced workforce with representation from both white and blue collar jobs. Manufacturing and industrial sectors are strongly represented in the area. The unemployment rate was 15.8% as of December 2025, with an estimated employment growth of 7.4% over the past year, according to AreaSearch's aggregation of statistical area data.

As of December 2025963 residents are employed while the unemployment rate is 11.7%, which is higher than Greater Sydney's rate of 4.2%. Workforce participation in Sadleir lags behind Greater Sydney at 44.7% compared to 68.8%. According to Census responses, 18.2% of residents work from home. Employment is concentrated in health care & social assistance, retail trade, and manufacturing sectors.

Manufacturing employment levels are particularly high, at 2.2 times the regional average. In contrast, professional & technical services employ only 2.6% of local workers, lower than Greater Sydney's 11.5%. The area appears to offer limited local employment opportunities, as indicated by the count of Census working population versus resident population. During the year to December 2025, employment levels increased by 7.4%, and labour force increased by 4.9%, resulting in a decrease in unemployment by 2.0 percentage points. In comparison, Greater Sydney experienced employment growth of 2.2% and labour force growth of 2.3%. Jobs and Skills Australia's national employment forecasts from May-25 offer insight into potential future demand within Sadleir. These projections suggest that national employment should expand by 6.6% over five years and 13.7% over ten years, with varying growth rates between industry sectors. 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.

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

The suburb of Sadleir had a lower than average income level nationally in financial year 2023, according to latest ATO data aggregated by AreaSearch. Its median taxpayer income was $38,586 and the average stood at $44,763, compared to Greater Sydney's figures of $60,817 and $83,003 respectively. Based on Wage Price Index growth of 10.32% since financial year 2023, current estimates for Sadleir would be approximately $42,568 (median) and $49,383 (average) as of March 2026. According to 2021 Census figures, incomes in Sadleir all fell between the 1st and 2nd percentiles nationally. Income distribution showed that the $400 - 799 bracket dominated with 28.5% of residents (944 people), contrasting with regional levels where the $1,500 - 2,999 bracket led at 30.9%. Economic circumstances reflected widespread financial pressure, with 42.2% of households operating within modest weekly budgets below $800. Housing affordability pressures were 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 55.9% houses and 44.1% other dwellings. Home ownership in Sadleir was at 19.7%, with the rest being mortgaged (25.9%) or rented (54.3%). The median monthly mortgage repayment in Sadleir was $1,878, below Sydney metro's average of $2,427. The median weekly rent figure in Sadleir was recorded at $250, compared to Sydney metro's $470. Nationally, Sadleir's mortgage repayments were higher than the Australian average of $1,863, while rents were substantially below the national figure of $375.

Sadleir has a typical household mix, with a higher-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 larger than the Greater Sydney average of 2.7.

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 38.0%. This disparity presents both a challenge and an opportunity for targeted educational initiatives. 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 such qualifications, including advanced diplomas (10.0%) and certificates (21.8%).

Educational participation is high, with 36.5% of residents currently enrolled in formal education. This includes primary education (13.9%), secondary education (11.7%), and tertiary education (4.8%).

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

Public transport analysis shows 17 active transport stops operating in Sadleir, consisting of buses. These stops are served by 17 individual routes, collectively offering 965 weekly passenger trips. Transport accessibility is rated excellent, with residents typically located 143 meters from the nearest stop. Most residents commute outward due to its residential nature, with car being the dominant mode at 89%. Vehicle ownership averages 1.2 per dwelling. According to the 2021 Census, 18.2% of residents work from home, which may reflect COVID-19 conditions.

Service frequency averages 137 trips per day across all routes, equating to approximately 56 weekly trips per individual stop.

Health performance in Sadleir is well below average with a range of health conditions having marked impacts on both younger and older age cohorts

Health data indicates significant health issues in Sadleir, as assessed by AreaSearch. Mortality rates and chronic condition prevalence are substantial, affecting various age groups. Private health cover is low at approximately 45% (~1,482 people), compared to Greater Sydney's 59.9% and the national average of 55.7%.

The most prevalent conditions are asthma (8.8%) and arthritis (8.7%), with 68.3% reporting no medical ailments, compared to 74.6% in Greater Sydney. Working-age residents face notable health challenges due to higher chronic condition rates. Sadleir has 13.7% of residents aged 65 and over (454 people), lower than Greater Sydney's 15.5%. Health outcomes among seniors present some challenges, aligning with national rankings for the general 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 level of cultural diversity, with 39.9% of its population born overseas and 57.3% speaking a language other than English at home. The predominant religion in Sadleir is Christianity, comprising 36.5% of the population. However, Islam is notably overrepresented, making up 29.4%, which is significantly higher than the Greater Sydney average of 6.8%.

Regarding ancestry, the top three groups are Other (20.8%), Australian (19.6%), and English (12.7%), with English being lower than the regional average of 19.0%. Some ethnic groups have notable disparities: Lebanese at 12.7% compared to the regional average of 2.6%, Vietnamese at 11.5% compared to 1.8%, and Samoan at 2.6% compared to 0.5%.

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

Sadleir has a median age of 33, which is younger than Greater Sydney's figure of 37 and Australia's average of 38 years. Compared to Greater Sydney, Sadleir has a higher proportion of residents aged 15-24 (17.3%) but fewer residents aged 25-34 (11.4%). Between the 2021 Census and the present day, the 15-24 age group has increased from 15.7% to 17.3%, while the 65-74 cohort has grown from 6.5% to 7.9%. Conversely, the 55-64 cohort has decreased from 12.3% to 11.4%. By 2041, population forecasts indicate significant demographic shifts in Sadleir. The 75-84 age group is projected to grow by 93%, adding 123 residents to reach a total of 256. Meanwhile, the 35-44 age group is expected to decrease by 9 residents.