Gymea
With a median house price of $1.4 million and one-third of residents owning outright, Gymea punches well above the national household income percentile at 76.7. The suburb splits almost evenly between houses (44.9%), apartments (31.6%), and semi-detached dwellings (22.9%), a three-way balance rarely seen in Sydney's south. University attainment sits 5.9 percentage points above the national average, and 68 development applications landed in the past 12 months, signalling ongoing renovation pressure in this established Sutherland Shire pocket.
Population
8,219
Median Age
39.0
Household IncomeiMedian weekly household income (ABS Census)
$2,049/wk
DAs (12 months)iDevelopment Applications lodged in the past year
69
Median House
$1.4M
2024-2025 (PSI derived)
Houses here carry a $1.4 million median, up 9.6% from $1.34 million a year earlier. That growth rate outpaces most of the Sutherland Shire. Mortgage repayments average $2,600 per month, pushing mortgage-to-income to 29.3%, just below the 30% stress threshold. The 3-bedroom bracket dominates at 38.9%, followed by 2-bedrooms at 33.4%, so families and downsizers compete for the same stock. With 33.3% owning outright and 34.1% on a mortgage, turnover stays limited because long-term owners sit tight. Buyers should note the apartment share of 31.6% is higher than typical Shire suburbs.
For Buyers
Houses here carry a $1.4 million median, up 9.6% from $1.34 million a year earlier. That growth rate outpaces most of the Sutherland Shire. Mortgage repayments average $2,600 per month, pushing mortgage-to-income to 29.3%, just below the 30% stress threshold. The 3-bedroom bracket dominates at 38.9%, followed by 2-bedrooms at 33.4%, so families and downsizers compete for the same stock. With 33.3% owning outright and 34.1% on a mortgage, turnover stays limited because long-term owners sit tight. Buyers should note the apartment share of 31.6% is higher than typical Shire suburbs.
For Investors
Rental yield faces pressure: weekly rent sits at $500 against a $1.4 million median, producing a gross yield around 1.9%, lower than the Sydney metro average. The vacancy rate of 5.8% suggests tenants have options, so landlords may need to price competitively. Still, 32.6% of residents rent, providing a solid tenant pool. With 68 DAs in 12 months, including dual occupancy and commercial conversions, the suburb is densifying. Population growth runs at 0.46% annually (86 persons per year), driven by overseas migration at 136 net arrivals per year.
Development Activity
Total DAs
348
Last 12 Months
69
YoY ChangeiYear-over-year change in DA lodgements
+19.0%
Avg DA CostiAverage estimated cost per DA in the past year
N/A
Monthly DA Lodgements
DA Categories
Schools in Gymea iICSEA: school advantage index. 1000 = national avg, higher = more advantaged
Sydney Montessori School
K-11 · 147 students
St Catherine Labouré Catholic Primary School
K-6 · 596 students
Gymea North Public School
K-6 · 362 students
Gymea Technology High School
7-12 · 554 students
Demographics
Gymea's median age of 39 sits 1 year below the national median. The workforce leans professional, with 1,077 professionals and 687 managers as the top two occupation groups. English ancestry leads at 3,098 residents, followed by Irish (1,105) and Scottish (755), giving it an Anglo-leaning profile with only 21.6% born overseas, right at the national average. Average household size of 2.5 matches the national figure exactly. The community skews Christian (4,586), with small Buddhist (134) and Hindu (65) minorities.
Age Distribution
Bedrooms
Dwelling Structure
44.9%
Houses
22.9%
Townhouse
31.6%
Apartment
Tenure
Prices jumped from $1.34 million to $1.47 million in one year, a 9.6% gain. The ownership split is unusually even: 33.3% outright, 34.1% mortgage, 32.6% renting. This three-way parity is uncommon nationally, where renters typically trail. The dwelling mix tells a similar story of balance, with separate houses at 44.9%, apartments at 31.6%, and semi-detached at 22.9%. Three-bedroom homes make up 38.9% of stock, but 4-plus bedroom properties at 23.6% indicate a significant family-sized segment. Mortgage stress remains below the national threshold at 29.3%.
Median House Price Trend
Source: State Valuer-General
Mortgage / mo
$2,600
Rent / wk
$500
HH Size
2.5
Personal Income / wk
$1,020
Vacancy Ratei% of dwellings unoccupied on Census night (ABS 2021)
5.8%
Unoccupied
200
Rent / IncomeiMedian rent as % of household income. Over 30% = housing stress
24.4%
Mortgage / IncomeiMedian mortgage as % of household income. Over 30% = housing stress
29.3%
Community Profile
Languages Spoken at Home
Ancestry
Household Composition
25.5%
Couples, no children
6,712
Total families
Economy & Employment
Healthcare employs the largest share of workers at 14.6% (461 people), followed by professional/tech at 11.9% and construction at 11.5%. This spread across knowledge and trades sectors provides resilience. Unemployment sits at just 3.9%, well below the national average of around 5%. Full-time employment runs at 66.5%, and the participation rate of 58.5% reflects the older demographic. SEIFA scores are strong: IRSD decile 10 and IRSAD decile 9, placing Gymea in the top 10-20% nationally for socioeconomic advantage. The IER decile of 10 confirms very low economic resource deprivation.
Unemployment
1.8%
Labour Force
11,002
Unemployed
198
Quarterly Trend
Source: SALM Dec-25
Socio-Economic Indexes (SEIFA)iABS index ranking suburbs from 1 (most disadvantaged) to 10 (most advantaged)
Full-time
66.5%
Part-time
29.6%
Participation
58.5%
Employed
3,749
Occupations
Top Industries
University
36.0%
Postgraduate
8.3%
Born Overseas
21.6%
Dwellings
3,228
Transport to Work
Car dependence is high at 82.7% driving to work, with only 7.6% using public transport, lower than the Sydney average. Walking and cycling accounts for just 4%. Schooling options include 4 campuses: Sydney Montessori School (ICSEA 1118, 147 students), St Catherine Laboure Catholic Primary (ICSEA 1109, 596 students), Gymea North Public (ICSEA 1075, 362 students), and Gymea Technology High (ICSEA 1048, 554 students). All ICSEA scores sit above the national median of 1000, placing every local school in the upper half nationally.
Drive
82.7%
Public Transport
7.6%
Walk / Cycle
4.0%
Work from Home
N/A
Population Forecast
+0.46%/yr
(+86 people/yr)
EstablishedPopulation grows at a modest 0.46% per year, adding roughly 86 people annually. The primary driver is overseas migration, averaging 136 net arrivals per year, while internal migration runs negative at -61 per year, meaning more locals leave than arrive from elsewhere in Australia. The medium forecast projects population rising from about 18,800 in 2026 to 19,200 by 2031. Gentrification signals are absent (score 0), consistent with an already-established affluent suburb. Real income grew 16.5% over the decade, above the national average, while affordability has marginally improved from 53.4% to 50.7%.
Historical + Forecast
Hamilton-Perry + Holt smoothing on ERP 2001-2025
Age Cohort Forecast
Primary Driver
Overseas Migration
Net Overseas / yr
+136
Net Internal / yr
-61
Gentrification Signal
Not gentrifying
National Ranking iPercentile rank among ~15,000 AU suburbs. 90% = higher than 90% of suburbs
How Gymea compares to ~15,000 Australian suburbs
Frequently Asked Questions
Is Gymea a good suburb to live in?
Gymea ranks in SEIFA IRSAD decile 9, placing it in the top 20% nationally for socioeconomic advantage. Household income sits at the 76.7th percentile, and all 4 local schools have ICSEA scores above the national median of 1000. Mortgage stress stays below 30% at 29.3%.
What is the median house price in Gymea?
The median house price is $1,400,000 as of 2025, up 9.6% from $1,340,000 the previous year. Monthly mortgage repayments average $2,600, and the mortgage-to-income ratio sits at 29.3%, just under the 30% stress line.
What schools are in Gymea?
Gymea has 4 schools: Sydney Montessori School (Combined, Independent, ICSEA 1118, 147 students), St Catherine Laboure Catholic Primary (ICSEA 1109, 596 students), Gymea North Public School (ICSEA 1075, 362 students), and Gymea Technology High School (ICSEA 1048, 554 students). All score above the national ICSEA average.
Is Gymea safe?
Crime data is not available for Gymea at suburb level. However, the SEIFA IRSD decile of 10 (lowest disadvantage nationally) and the low unemployment rate of 3.9% are both correlated with lower crime in Australian research.
Is Gymea good for property investment?
Prices rose 9.6% in one year to $1.4 million, but gross rental yield sits around 1.9% ($500/week rent vs $1.4M median), below the Sydney average. Vacancy at 5.8% suggests moderate competition for tenants. The 68 DAs in 12 months point to densification potential.
How is Gymea's population changing?
Population grows at 0.46% per year, adding about 86 people annually. Overseas migration (+136/yr) drives growth while internal migration runs negative (-61/yr). The medium forecast projects around 19,200 residents by 2031, up from 18,800 in 2026.
How much development activity is there in Gymea?
Gymea logged 68 development applications in the past 12 months. Recent filings include dual occupancy projects and commercial conversions like food and drink premises, reflecting both residential densification and mixed-use expansion.
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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