Sadleir
A 33-year median age and 39.9% overseas-born population give Sadleir a younger, culturally varied profile, while 54.0% of households rent. Its 3,243 residents occupy just 0.9 sq km, producing a density of 3,606.5 people per sq km. Household income sits at the 10.3 percentile, below national levels, which helps explain the strong renter presence and modest housing format. Compared with nearby Green Valley and Ashcroft, the compact footprint creates a more concentrated urban feel. The 85.2% separate-house share still gives the area a family-oriented physical layout, despite apartments accounting for 11.8% of dwellings.
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
36
Homebuyers are choosing a predominantly detached market: separate houses account for 85.2%, with 58.2% of dwellings containing 3 bedrooms and 24.8% containing 4 or more. That mix suits families seeking established layouts, but the 45.8% mortgage-to-income ratio is higher than the 26.4% rent-to-income ratio, so borrowing capacity needs careful testing. A monthly mortgage of $1,878 should be assessed against weekly household income of $946, which sits at the 10.3 percentile and below national norms. With 54.0% renting and only 19.4% owning outright, the tenure mix is less ownership-heavy than markets with stronger outright ownership.
For Buyers
Homebuyers are choosing a predominantly detached market: separate houses account for 85.2%, with 58.2% of dwellings containing 3 bedrooms and 24.8% containing 4 or more. That mix suits families seeking established layouts, but the 45.8% mortgage-to-income ratio is higher than the 26.4% rent-to-income ratio, so borrowing capacity needs careful testing. A monthly mortgage of $1,878 should be assessed against weekly household income of $946, which sits at the 10.3 percentile and below national norms. With 54.0% renting and only 19.4% owning outright, the tenure mix is less ownership-heavy than markets with stronger outright ownership.
For Investors
Investor demand has a clear rental base because 54.0% of occupied dwellings are rented, while weekly rent is $250. The 7.2% vacancy rate is a useful counterweight: tenant demand exists, but vacancies may make lease-up and rent growth less predictable than in tighter markets. Compared with outright ownership at 19.4%, renting is the dominant tenure, and 3-bedroom homes represent 58.2% of stock, pointing to family-oriented tenant demand. Development activity is notable at 34 applications in 12 months, including a secondary dwelling and new dwelling examples. That pipeline can add rental supply, so investors should assess street-level competition, property condition and achievable rent rather than relying on the renter share alone.
Development Activity
Total DAs
140
Last 12 Months
36
YoY ChangeiYear-over-year change in DA lodgements
+33.3%
Avg DA CostiAverage estimated cost per DA in the past year
N/A
Monthly DA Lodgements
DA Categories
Schools in Sadleir
Open-register school locations for education access. This is not a school-quality ranking.
Demographics
At 33, Sadleir's median age is 7 years below the national figure, and university attainment at 14.6% is 15.5 percentage points below the national level. By contrast, overseas-born residents account for 39.9%, 18.3 points higher than nationally. Lebanese and English ancestry each count 449 people, while Vietnamese ancestry counts 406 and Arabic is spoken by 373 residents. Islam has 838 adherents, Christianity 1,042 and no religion 552. Average household size is 3.0, or 0.5 above the national comparison, which aligns with 42.1% of families being couples with children. Compared with nearby Green Valley and Ashcroft, these figures point to a young, migrant-connected family profile.
Age Distribution
Bedrooms
Dwelling Structure
85.2%
Houses
3.0%
Townhouse
11.8%
Apartment
Tenure
Housing is anchored by detached stock, with separate houses at 85.2%, apartments at 11.8% and semi-detached dwellings at 3.0%. The bedroom profile is concentrated in 3-bedroom homes at 58.2%, followed by 4-plus bedrooms at 24.8%, so larger family formats are more common than compact dwellings. Tenure is renter-heavy: 54.0% rent, compared with 25.3% paying a mortgage and 19.4% owning outright. That pattern reflects lower household purchasing power, with weekly household income of $946 at the 10.3 percentile, while the mortgage-to-income ratio of 45.8% is above the 26.4% rent ratio. The 7.2% vacancy rate may give renters more choice than in tighter markets.
Mortgage / mo
$1,878
Rent / wkiMedian weekly rent for new bonds (April to June 2026), NSW Rental Bond Board (DCJ). Census 2021 median: $250.
$650
Bond data Jun 2026 · houses $650
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
42.1%
Couples with children
18.8%
Couples, no children
36.3%
Single parent
736
Total families
Economy & Employment
Healthcare is Sadleir's leading industry at 21.8%, followed by retail at 9.9%, construction and education at 9.0% each, and manufacturing at 8.7%. Compared with the smaller industry shares, healthcare is a clear local employment concentration, consistent with community-facing work. Occupations also lean practical: machinery and drivers number 125, labourers 123 and trades 93, ahead of community and personal service at 89 and clerical and administration at 85. Weekly personal income is $446 and household income is $946, with the latter at the 10.3 percentile. The 12.6% unemployment rate and 33.1% participation rate sit alongside 46.4% full-time employment, suggesting economic capacity is constrained compared with higher-income suburban markets.
Unemployment
12.6%
Labour Force
818
Unemployed
103
Source: ABS Census 2021
Socio-Economic Indexes (SEIFA)iABS index ranking suburbs from 1 (most disadvantaged) to 10 (most advantaged)
Full-time
46.4%
Part-time
31.7%
Participation
33.1%
Employed
715
Full-time and part-time are shares of the employed. Source: ABS Census 2021
Occupations
Top Industries
University
14.6%
Postgraduate
2.9%
Born Overseas
39.9%
Dwellings
983
Transport to Work
Daily life is strongly car-oriented: 68.9% travel as car drivers, compared with 5.2% using public transport and 1.6% walking or cycling. Work-from-home reaches 19.1%, which may reduce some commuting pressure, but local errands and employment access are still likely to depend on vehicles. One local government primary school, Sadleir Public School, is named within the suburb; families should confirm enrolment zones and secondary options against the exact address. The 3.0-person average household size and 42.1% couples-with-children share support a family-use pattern, while 12.2% need assistance suggests accessibility and service proximity matter. With a 0.9 sq km footprint and density of 3,606.5, daily destinations can be close in distance, though street-level amenity should be checked. A suburb-wide crime rate is not available, so compare current NSW Police information before deciding.
Drive
68.9%
Public Transport
5.2%
Walk / Cycle
1.6%
Work from Home
19.1%
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 can suit households wanting a compact, detached-house setting with a young profile. The median age is 33, 85.2% of homes are separate houses and 54.0% rent. Car use is high at 68.9%, while public transport is 5.2%, so the suburb may suit drivers more than transit-dependent households. Check the exact street, school zone and local services before committing.
What is the median house price in Sadleir?
A current median house price is not available for Sadleir. Compare recent sales of 3-bedroom and 4-plus-bedroom houses, which represent 58.2% and 24.8% of dwellings, and test repayments against weekly household income of $946. The mortgage-to-income ratio is 45.8%, so borrowing capacity deserves close attention before making an offer.
What schools are in Sadleir?
One local government primary school, Sadleir Public School, is named within the suburb. Families should confirm enrolment zones, year availability and secondary options for the exact address, since boundaries can cut across nearby streets. With 42.1% of families being couples with children and average household size of 3.0, school access is a practical factor for many households.
Is Sadleir safe?
A suburb-wide crime rate is not available for Sadleir, so the absence of a published rate should not be treated as a safety guarantee. Check current NSW Police information and inspect the exact street during daytime and evening. The suburb has 3,243 residents across 0.9 sq km, making street-level conditions especially relevant in a compact area.
Is Sadleir good for property investment?
It may suit investors targeting lower-rent family housing, but returns need careful testing. Renting is 54.0%, weekly rent is $250, vacancy is 7.2% and 3-bedroom homes make up 58.2% of stock. Development activity reached 34 applications over 12 months, which may increase competition. The 45.8% mortgage-to-income ratio also signals affordability pressure, so inspect tenant demand, costs and comparable rents.
How is Sadleir's population changing?
Sadleir has 3,243 residents and a median age of 33. Recent mobility is relatively stable: 86.0% stayed at the same address and turnover was 14.0%. At the same time, 34 development applications in 12 months point to incremental renewal through additions, secondary dwellings and new homes. The 0.9 sq km footprint and density of 3,606.5 people per sq km mean small housing changes can have a visible local effect. These signals point to gradual change compared with major release areas.
What languages are spoken in Sadleir?
Sadleir has an overseas-born share of 39.9%, which is 18.3 percentage points above the national comparison. Arabic is the most prominent listed language with 373 speakers, followed by Khmer at 35, Samoan at 31 and Hindi at 21. Lebanese and Vietnamese ancestry have strong representation at 449 and 406 people respectively, which may shape local services and community connections.
What development is happening in Sadleir?
Development activity includes 34 applications over 12 months across dwelling houses, alterations and a secondary dwelling. With 3,243 residents in 0.9 sq km, additions and infill can affect streetscape and rental competition without requiring broad land release. Compared with a static housing market, this points to ongoing renewal, but application counts do not guarantee completion. Check approvals, construction status and the exact property before assuming a project will proceed.
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 education open registers (school locations), 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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