Sadleir
With household income sitting at the 10.3rd percentile nationally, Sadleir ranks among Sydney's lower-income pockets, yet the median house price has reached $930,000, a combination that creates significant mortgage pressure for buyers who enter. The suburb is predominantly a renter community: 54.7% of households rent, well above the national average, and 85.2% of dwellings are separate houses. At a median age of 33, residents are 7 years younger than the national figure, and the overseas-born share of 39.9% is 18.3 percentage points above the national rate. These signals point to a young, working-class, multicultural area where housing affordability is the central tension.
Population
3,243
Median Age
33.0
Household IncomeiMedian weekly household income (ABS Census)
$946/wk
DAs (12 months)iDevelopment Applications lodged in the past year
29
Median House
$930K
2024-2025 (PSI derived)
The $930,000 median house price is a significant commitment given that household income sits at the 10.3rd percentile nationally. Based on price history, prices moved from $880,000 in 2024 to $956,000 in 2025, an 8.6% annual gain. Monthly mortgage repayments average $1,878, which produces a mortgage-to-income ratio of 45.8%, well above the 30% stress threshold. The stock is overwhelmingly detached: 85.2% are separate houses, with apartments at just 11.8%. Three-bedroom homes dominate at 58.2% of dwellings, with 4-plus bedroom homes at 24.8%, making Sadleir suited to family buyers rather than downsizers or singles.
For Buyers
The $930,000 median house price is a significant commitment given that household income sits at the 10.3rd percentile nationally. Based on price history, prices moved from $880,000 in 2024 to $956,000 in 2025, an 8.6% annual gain. Monthly mortgage repayments average $1,878, which produces a mortgage-to-income ratio of 45.8%, well above the 30% stress threshold. The stock is overwhelmingly detached: 85.2% are separate houses, with apartments at just 11.8%. Three-bedroom homes dominate at 58.2% of dwellings, with 4-plus bedroom homes at 24.8%, making Sadleir suited to family buyers rather than downsizers or singles.
For Investors
A 54.7% renter share is well above the national average, giving landlords a large and stable tenant pool in this suburb. Weekly rent of $250 against a $930,000 median implies a gross yield near 1.4%, which is low, reflecting that prices have risen faster than rents. The 7.2% vacancy rate is moderate, signalling reasonable rental demand without oversupply. Development activity recorded 23 applications in the past 12 months, including secondary dwelling approvals, suggesting some incremental supply growth. Income at the 10.3rd percentile nationally means rental affordability is a structural constraint, so rent increases beyond current levels face resistance from a cost-sensitive tenant base.
Development Activity
Total DAs
128
Last 12 Months
29
YoY ChangeiYear-over-year change in DA lodgements
+11.5%
Avg DA CostiAverage estimated cost per DA in the past year
N/A
Monthly DA Lodgements
DA Categories
Schools in Sadleir iICSEA: school advantage index. 1000 = national avg, higher = more advantaged
Sadleir Public School
P-6 · 351 students
Demographics
The median age of 33 is 7 years below the national figure, reflecting a young resident base that skews toward families with children. The overseas-born share of 39.9% is 18.3 percentage points higher than the national rate, driven by communities from Lebanon, Vietnam and the broader Arab-speaking world, with Arabic the most common non-English language at 373 speakers. Christianity (1,042 residents) and Islam (838 residents) are the two dominant religions, the latter being higher than typical for NSW suburbs. University qualifications reach only 14.6%, which is 15.5 percentage points below the national average, consistent with the trade and manual occupation profile. Average household size is 3.0, which is 0.5 above the national figure, pointing toward multi-person family households.
Age Distribution
Bedrooms
Dwelling Structure
85.2%
Houses
3.0%
Townhouse
11.8%
Apartment
Tenure
Tenure in Sadleir is dominated by renters at 54.7%, compared to the national norm where owners typically outnumber renters. Outright owners account for 19.7% and mortgage holders 25.6%, the latter facing a mortgage-to-income ratio of 45.8%, a stress level that limits new buyer entry. Separate houses make up 85.2% of stock, a high proportion that reflects suburban development patterns typical of outer south-west Sydney. Three-bedroom homes represent 58.2% of all dwellings and 4-plus bedroom homes 24.8%, meaning large family homes dominate. Prices rose from $880,000 in 2024 to $956,000 in 2025, an 8.6% gain, and the current median sits at $930,000. At $250 per week, rent-to-income runs at 26.4%, just below the 30% stress benchmark.
Median House Price Trend
Source: State Valuer-General
Mortgage / mo
$1,878
Rent / wk
$250
HH Size
3.0
Personal Income / wk
$446
Vacancy Ratei% of dwellings unoccupied on Census night (ABS 2021)
7.2%
Unoccupied
76
Rent / IncomeiMedian rent as % of household income. Over 30% = housing stress
26.4%
Mortgage / IncomeiMedian mortgage as % of household income. Over 30% = housing stress
45.8% stressed
Community Profile
Languages Spoken at Home
Ancestry
Household Composition
11.4%
Couples, no children
2,526
Total families
Economy & Employment
Healthcare is the largest employment sector at 21.8% of workers (73 residents), followed by Retail at 9.9% (33), Construction and Education each at 9% (30 each), and Manufacturing at 8.7% (29). By occupation, Machinery and Drivers (125 workers) and Labourers (123) together form the largest groups, consistent with a blue-collar workforce profile rather than a professional or managerial base. The unemployment rate of 15.6% is elevated compared to national averages, and the participation rate of just 26.8% partly reflects a large number of residents not in the labour force (1,400 people). Full-time employment among those working is 59.4%. Income at the 10.3rd percentile nationally underlines that Sadleir sits firmly below the NSW median income level.
Socio-Economic Indexes (SEIFA)iABS index ranking suburbs from 1 (most disadvantaged) to 10 (most advantaged)
Full-time
59.4%
Part-time
25.0%
Participation
26.8%
Employed
559
Occupations
Top Industries
University
14.6%
Postgraduate
2.9%
Born Overseas
39.9%
Dwellings
983
Transport to Work
Car dependence is very high at 85.1% of workers commuting by car, well above the national average, while only 6.4% use public transport and 2% walk or cycle, reflecting limited transit infrastructure in this outer south-west Sydney location. No schools are recorded within the 0.9 square kilometre Sadleir boundary, so families depend on neighbouring suburbs for schooling. Crime statistics are not available for this suburb. The need-for-assistance rate of 12.2% (352 residents) is notable, indicating a meaningful share of the population with disability or age-related care needs. At a density of 3,607 residents per square kilometre, Sadleir is reasonably dense for a predominantly detached-house suburb, which reflects the compact 0.9 km2 footprint.
Drive
85.1%
Public Transport
6.4%
Walk / Cycle
2.0%
Work from Home
N/A
National Ranking iPercentile rank among ~15,000 AU suburbs. 90% = higher than 90% of suburbs
How Sadleir compares to ~15,000 Australian suburbs
Frequently Asked Questions
Is Sadleir a good suburb to live in?
Sadleir suits families wanting a detached house in outer south-west Sydney, with 85.2% of stock being separate houses and a median age of 33, which is 7 years below the national figure. The main constraints are high car dependence, household income at the 10.3rd percentile nationally, and mortgage stress of 45.8% for buyers who take on debt at the current $930,000 median.
What is the median house price in Sadleir?
The median house price in Sadleir is $930,000. Prices rose from $880,000 in 2024 to $956,000 in 2025, an 8.6% annual gain. Monthly mortgage repayments average $1,878, and rent averages $250 per week.
What schools are in Sadleir?
No schools are recorded within the Sadleir boundary (0.9 km2) in this dataset. Families rely on schools in neighbouring suburbs. The local university qualification rate is 14.6%, which is 15.5 percentage points below the national average.
Is Sadleir safe?
Detailed crime statistics are not available for Sadleir in this dataset. As an indirect indicator, the need-for-assistance rate of 12.2% (352 residents out of 3,243) suggests a community with some vulnerability, and the unemployment rate of 15.6% is above national norms, which are factors that can correlate with local disadvantage.
Is Sadleir good for property investment?
The 54.7% renter share, well above the national average, provides a large tenant pool. However, weekly rent of $250 against a $930,000 median implies a gross yield near 1.4%, which is low. The 8.6% price growth from 2024 to 2025 suggests capital growth potential, but mortgage stress at 45.8% limits the buyer pool and may constrain future price rises.
How is Sadleir's population changing?
Detailed population forecasts are not available for Sadleir in this dataset. The suburb has a young median age of 33 (7 years below national), an average household size of 3.0 (0.5 above national), and 39.9% of residents born overseas, all pointing toward a growing family-formation demographic that historically supports steady housing demand.
What languages are spoken in Sadleir?
About 39.9% of residents were born overseas, which is 18.3 percentage points above the national figure. Arabic is the most common non-English language with 373 speakers, followed by Khmer (35) and Samoan (31). Lebanese and Vietnamese ancestries are prominent alongside English ancestry.
How much development is happening in Sadleir?
There were 23 development applications lodged in the past 12 months, including secondary dwelling approvals and residential accommodation certificates. This level of activity for a 0.9 km2 suburb indicates incremental densification, with secondary dwellings (granny flats) being a notable application type.
How to read these comparisons
Phrases like "above the national average" reference the unweighted median across Australian suburbs with more than 1,000 residents, not population-weighted national figures. Suburb-level medians are more useful for ranking suburbs against each other; ABS census headlines are population-weighted (so dominated by Sydney and Melbourne) and can read very differently.
Current baseline (refreshed 2026-05-10): median age 40, university-educated 30.1%, born overseas 21.6%, average household size 2.5 people.
Data sources: ABS 2021 Census (demographics, income, tenure), state Valuer-General (house prices), Department of Jobs SALM (unemployment), ACARA (school ICSEA), state Crime Statistics agencies (offences), council DA portals (development applications). Population forecasts use a Hamilton-Perry cohort model calibrated to ABS ERP.
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