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 the suburb of Sadleir is around 3,317. This figure reflects an increase of 74 people since the 2021 Census, which reported a population of 3,243. The change is inferred from AreaSearch's estimate of 3,276 residents following examination of the ABS's latest ERP data release in June 2024 and an additional 11 validated new addresses since the Census date. This results in a 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.

AreaSearch is adopting 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. These projections anticipate an above median population growth across statistical areas nationally, with Sadleir expected to increase by 615 persons to 2041, reflecting an overall increase of 18.1% over the 17 years.

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 in Sadleir shows approximately six dwellings receiving development approval annually. Over the past five financial years, from FY-21 to FY-25, around 34 homes were approved, with three more approved so far in FY-26. Despite population decline, housing supply has remained adequate relative to demand, indicating a balanced market with diverse buyer choices.

The average construction cost of new properties is $222,000, below regional levels, suggesting more affordable housing options for buyers. This financial year, Sadleir has registered $303,000 in commercial approvals, reflecting its residential nature. Compared to Greater Sydney, Sadleir's construction activity is significantly lower, at 90.0% below the regional average per person, which typically reinforces demand and pricing for existing properties. This is also below the national average, suggesting mature planning constraints in the area. New development consists of 71.0% detached houses and 29.0% medium to high-density housing, maintaining Sadleir's suburban character focused on family homes.

With around 506 people per approval, Sadleir indicates a mature market. According to AreaSearch's latest quarterly estimate, the area is forecasted to gain 600 residents by 2041. If current development rates continue, housing supply may not keep pace with population growth, potentially increasing buyer competition and supporting stronger price growth.

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 that may impact this region. Notable projects include Hurlstone Agricultural High School Redevelopment, Spring Square by Poly Bankstown, Busby Social Housing for Seniors, and Avala Apartments Miller. The following details those 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.

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

Sadleir has a balanced workforce with white and blue collar jobs, prominent manufacturing and industrial sectors, and an unemployment rate of 15.4%. In the past year, employment grew by 7.5%. As of September 2025, there are 959 residents employed while the unemployment rate is 11.2%, higher than Greater Sydney's rate of 4.2%.

Workforce participation in Sadleir is lower at 45.2% compared to Greater Sydney's 70.0%. According to Census data, 18.2% of residents work from home. Employment is concentrated in health care & social assistance, retail trade, and manufacturing, with the latter being particularly notable at 2.2 times the regional average. However, professional & technical employment is low at 2.6%, below Greater Sydney's 11.5%.

Over the year to September 2025, employment increased by 7.5% while labour force grew by 4.0%, leading to a decrease in unemployment of 2.7 percentage points. In contrast, Greater Sydney experienced employment growth of 2.1% and labour force growth of 2.4%. Jobs and Skills Australia's national employment forecasts from May-25 suggest that national employment will expand by 6.6% over five years and 13.7% over ten years. Applying these projections to Sadleir's employment mix indicates local employment should increase by 5.8% over five years and 12.6% over ten years, though this is a simple extrapolation for illustrative purposes only.

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

The suburb of Sadleir had a lower income level than average nationally in financial year 2023, according to latest ATO data aggregated by AreaSearch. Its median income among taxpayers was $38,586, and the average income stood at $44,763. These figures compared to Greater Sydney's median of $60,817 and average of $83,003 respectively. Based on Wage Price Index growth of 8.86% since financial year 2023, current estimates for Sadleir would be approximately $42,005 (median) and $48,729 (average) as of September 2025. According to 2021 Census figures, household, family, and personal incomes in Sadleir all fell between the 1st and 2nd percentiles nationally. Distribution data showed that the $400 - $799 bracket dominated with 28.5% of residents (945 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

Sadleir's dwelling structures, as per the latest Census, consisted of 85.2% houses and 14.8% other dwellings (semi-detached, apartments, 'other' dwellings). This contrasts with Sydney metro's structure of 55.9% houses and 44.1% 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 $2,427. The median weekly rent figure 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 lower than 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% that are couples with children, 11.9% that are couples without children, and 25.8% that are single parent families. Non-family households make up 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 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 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

Sadleir has 17 active public transport stops, all serving buses. These stops are covered by 17 different routes that together facilitate 965 weekly passenger trips. The area's transport accessibility is rated excellent, with residents typically residing just 143 meters from the nearest stop. Most commuters travel outward due to Sadleir's residential nature. Cars remain the primary mode of transport, used by 89% of residents. 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. On average, service frequency is 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

Sadleir faces significant health challenges, according to AreaSearch's assessment. Mortality rates and chronic condition prevalence are substantial, impacting both younger and older age cohorts. The rate of private health cover is extremely low at approximately 45% (~1,483 people), compared to Greater Sydney's 59.9% and the national average of 55.7%.

Asthma and arthritis were found to be the most common medical conditions, affecting 8.8 and 8.7% of residents respectively. However, 68.3% of residents declared themselves completely clear of medical ailments, compared to Greater Sydney's 74.6%. The working-age population faces notable health challenges due to elevated chronic condition rates. The area has 13.8% of residents aged 65 and over (457 people), which is lower than Greater Sydney's 15.4%. Health outcomes among seniors present some challenges, with national rankings broadly in line with 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 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, comprising 36.5% of people. Islam is overrepresented, making up 29.4%, compared to Greater Sydney's average of 6.8%.

The top three ancestral groups are Other (20.8%), Australian (19.6%), and English (12.7%), which is lower than the regional average of 19.0%. Notably, Lebanese people make up 12.7% of Sadleir's population compared to 2.6% regionally, Vietnamese people comprise 11.5% versus 1.8%, and Samoan people account for 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 national average of 38 years. Compared to Greater Sydney, Sadleir has a higher percentage of residents aged 15-24 (17.6%) but fewer residents aged 25-34 (10.7%). 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 percentage of Sadleir's population in the 15 to 24 age group has increased from 15.7% to 17.6%, while the 65 to 74 cohort has risen from 6.5% to 7.9%. Conversely, the 25 to 34 age group has decreased from 12.2% to 10.7%. By 2041, population forecasts indicate substantial demographic shifts in Sadleir. The 75 to 84 age cohort is projected to grow by 90%, adding 125 residents and reaching a total of 265. Meanwhile, the 35 to 44 age group is expected to decrease by 9 residents.