Sadleir

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

As of Feb 2026, the estimated population of Sadleir is around 3,317, reflecting a 74 person increase (2.3%) since the 2021 Census which reported 3,243 people. This change is inferred from AreaSearch's estimation of the resident population at 3,276 in June 2024, based on ABS ERP data, and an additional 11 validated new addresses since the Census date. This results in a population density ratio of 3,685 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. For future projections until 2041, AreaSearch is using 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 for areas not covered by this data, 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 608 persons to 2041, reflecting a total increase of 17.1% over the 17-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 of ABS building approval numbers, allocated from statistical area data in Sadleir, indicates approximately 8 dwellings receive development approval annually. Over the past five financial years, from FY-21 to FY-25, around 41 homes were approved, with an additional 9 approved so far in FY-26. On average, about 0.1 new residents arrive per new home each year over these five financial years.

This rate suggests that new construction is meeting or exceeding demand, providing more housing options and enabling population growth. The average expected construction cost of new properties is $222,000, which is below regional levels, indicating more affordable housing choices for buyers. In FY-26, Sadleir has registered approximately $303,000 in commercial approvals, reflecting the area's residential nature. Compared to Greater Sydney, Sadleir shows significantly reduced construction activity, with 88.0% fewer dwellings approved per person. This constrained new construction typically reinforces demand and pricing for existing properties. However, development activity has increased recently.

Nationally, Sadleir also reflects lower development levels, suggesting market maturity and possible development constraints. The current housing mix consists of 64.0% detached houses and 36.0% medium to high-density housing, with an increasing variety of townhouses and apartments offering options across different price points. This shift from the current housing mix (85.0% houses) reflects reduced availability of development sites and addresses changing lifestyle demands and affordability requirements. With approximately 329 people per dwelling approval, Sadleir exhibits characteristics of a low-density area. According to AreaSearch's latest quarterly estimate, Sadleir is expected to grow by around 567 residents by 2041. If current development rates continue, 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

Changes in local infrastructure significantly affect an area's performance. AreaSearch has identified three projects expected to impact the region: Hurlstone Agricultural High School Redevelopment, Spring Square by Poly Bankstown, Busby Social Housing for Seniors, and Avala Apartments Miller. The following details those considered most relevant.

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.

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

Sadleir has a balanced workforce comprising white and blue-collar jobs, with manufacturing and industrial sectors well-represented. Its unemployment rate was 16.0% in the past year, with an estimated employment growth of 7.5%. As of December 2025, Sadleir's unemployment rate is 11.8%, higher than Greater Sydney's rate of 4.2%.

Workforce participation stands at 45.3%, significantly lower than Greater Sydney's 70.2%. Approximately 18.2% of residents work from home, though Covid-19 lockdown impacts are notable. Employment is concentrated in health care & social assistance, retail trade, and manufacturing, with the latter being particularly prominent at 2.2 times the regional average. Conversely, professional & technical employment comprises only 2.6% of local workers, below Greater Sydney's 11.5%.

Between December 2024 and December 2025, employment levels increased by 7.5%, while labour force grew by 4.9%, resulting in a 2.1 percentage point decrease in unemployment. In contrast, Greater Sydney saw employment growth of 2.2% and labour force growth of 2.3%. Jobs and Skills Australia's national employment forecasts from May-25 project overall employment growth of 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 weighted extrapolations for illustrative purposes only and do not account for localized population projections.

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

The suburb of Sadleir's income level is lower than average nationally according to latest ATO data aggregated by AreaSearch for financial year 2023. The median income among taxpayers in Sadleir is $38,586 and the average income stands at $44,763, compared to Greater Sydney's figures of $60,817 and $83,003 respectively. Based on Wage Price Index growth of 8.86% since financial year 2023, estimated incomes as of September 2025 would be approximately $42,005 (median) and $48,729 (average). According to 2021 Census figures, household, family and personal incomes in Sadleir all fall between the 1st and 2nd percentiles nationally. Distribution data shows that 28.5% of residents (945 people) earn within the $400 - 799 bracket, contrasting with regional levels where the $1,500 - 2,999 bracket leads at 30.9%. Economic circumstances indicate widespread financial pressure, with 42.2% of households operating on weekly budgets below $800. Housing affordability pressures are 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). This compared to Sydney metro's 55.9% houses and 44.1% other dwellings. Home ownership in Sadleir stood at 19.7%, with mortgaged dwellings at 25.9% and rented ones at 54.3%. The median monthly mortgage repayment was $1,878, below Sydney metro's average of $2,427. The median weekly rent figure was $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 lower at $375.

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

Family households comprise 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 make up the remaining 30.2%, consisting of 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 prominent, with 31.8% of residents aged 15+ holding them, 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 13.9% in primary education, 11.7% in secondary education, and 4.8% pursuing tertiary education.

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

Sadleir has 17 active public transport stops, all of which are bus stops. These stops are served by 17 different routes that collectively facilitate 965 weekly passenger trips. The area's transport accessibility is rated excellent, with residents typically residing just 143 meters from the nearest stop. As a predominantly residential zone, most Sadleir residents commute outward, primarily by car (89%). On average, there are 1.2 vehicles per dwelling in the area. According to the 2021 Census, 18.2% of residents work from home, which may be influenced by COVID-19 conditions.

The service frequency across all routes averages 137 trips per day, 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 challenges in Sadleir. AreaSearch's assessment shows high mortality rates and prevalence of chronic conditions across various age groups. Only approximately 45% (~1,483 people) have private health cover, compared to Greater Sydney's 59.9% and the national average of 55.7%.

The most prevalent medical conditions are asthma (8.8%) and arthritis (8.7%). Conversely, 68.3% of residents report no medical ailments, lower than Greater Sydney's 74.6%. Working-age individuals face notable health challenges due to elevated chronic condition rates. Sadleir has 14.1% of residents aged 65 and over (467 people), slightly lower than Greater Sydney's 15.4%. Senior health outcomes are broadly in line with national rankings.

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. Christianity is the predominant religion in Sadleir, comprising 36.5% of the population. However, Islam is significantly overrepresented, making up 29.4%, compared to the Greater Sydney average of 6.8%.

The top three ancestry groups are Other (20.8%), Australian (19.6%), and English (12.7%), which is lower than the regional average of 19.0%. Notably, Lebanese ethnicity is overrepresented at 12.7% in Sadleir compared to the regional average of 2.6%, Vietnamese at 11.5% versus 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's median age is 33, which is lower 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 (17.6%) but fewer residents aged 25-34 (10.8%). This concentration of 15-24 year-olds is significantly higher than the national average of 12.5%. Between the 2021 Census and the present, the proportion of Sadleir's population aged 15 to 24 has increased from 15.7% to 17.6%, while the 65 to 74 age group has grown from 6.5% to 8.1%. Conversely, the 25 to 34 age group has decreased from 12.2% to 10.8%. By 2041, population forecasts indicate substantial demographic shifts in Sadleir. The 75 to 84 age cohort is projected to grow by 86%, adding 122 residents and reaching a total of 265. Meanwhile, both the 0 to 4 and 35 to 44 age groups are expected to decrease in number.