Trigg
Household income at the 96th percentile nationally, yet the median house price sits at an estimated $679,000, well below what those incomes would imply in Sydney or Melbourne. Trigg is a compact 2.38 km2 coastal suburb with 2,855 residents, where 50.9% hold university qualifications, 38.4 points above the national average. Ownership is deeply entrenched: 49.1% own outright and only 11.7% rent, the lowest renter share you typically find in a suburb with this income profile. The stock is 86.8% separate houses, and four-plus bedroom dwellings account for 51.1% of all homes, consistent with the established-family character.
Population
2,855
Median Age
43.0
Household IncomeiMedian weekly household income (ABS Census)
$2,779/wk
DAs (12 months)iDevelopment Applications lodged in the past year
28
Median House
$679K
Estimated from rent (2025)
The median house price is estimated at $679,000, with monthly mortgage repayments averaging $3,000 and a mortgage-to-income ratio of 24.9%, comfortably below the 30% stress threshold despite a household income already in the 96th percentile nationally. Separate houses dominate at 86.8% of dwellings, while apartments are practically absent at 0.3%, so buyers face little format ambiguity. Four-plus bedroom homes account for 51.1% of the stock and three-bedroom homes for 36.7%, which means the suburb is almost entirely family-sized housing. Outright owners at 49.1% outnumber mortgage holders at 39.2% by a wide margin, a sign of long-held, debt-free tenure rather than active market churn. Rent-to-income at 17.5% adds further evidence of financial comfort across the resident base.
For Buyers
The median house price is estimated at $679,000, with monthly mortgage repayments averaging $3,000 and a mortgage-to-income ratio of 24.9%, comfortably below the 30% stress threshold despite a household income already in the 96th percentile nationally. Separate houses dominate at 86.8% of dwellings, while apartments are practically absent at 0.3%, so buyers face little format ambiguity. Four-plus bedroom homes account for 51.1% of the stock and three-bedroom homes for 36.7%, which means the suburb is almost entirely family-sized housing. Outright owners at 49.1% outnumber mortgage holders at 39.2% by a wide margin, a sign of long-held, debt-free tenure rather than active market churn. Rent-to-income at 17.5% adds further evidence of financial comfort across the resident base.
For Investors
A renter share of just 11.7% against weekly rent of $485 reflects thin tenant demand in a suburb where most residents own. At the $679,000 median, that rent implies a gross yield near 3.7%, modest but in line with comparable coastal WA markets. The vacancy rate is high at 8.0%, signalling real softness in what is already a small rental pool. Development activity recorded 20 applications in the past 12 months, mostly single-house works rather than new supply. Population growth averages 89 persons per year at 0.99% annually, driven primarily by overseas migration of 124 net arrivals per year versus net internal flows of 23. The gentrification score of 22 with signals of early-stage change suggests gradual upward pressure on quality and pricing over the medium term.
Development Activity
Total DAs
28
Last 12 Months
28
YoY ChangeiYear-over-year change in DA lodgements
—
Avg DA CostiAverage estimated cost per DA in the past year
N/A
Monthly DA Lodgements
DA Categories
Demographics
The median age is 43, which is 3 years above the national figure, and the trajectory is aging: the senior share rose 6.1 points over the decade while the working-age share fell 5.5 points. Overseas-born residents account for 22.7%, only 1.1 points above national, so the demographic is predominantly Australian-born. Ancestry is Anglo-Celtic in character: English (1,193), Irish (348) and Scottish (313) are the top three, followed by Italian (259). University qualifications at 50.9% run 20.8 points above the national average, placing Trigg among the most educated suburbs in WA. Average household size is 2.7, slightly above the national norm by 0.2, consistent with the family-house stock and couples-with-children profile, where 1,049 families fit that description against 606 couples without children.
Age Distribution
Bedrooms
Dwelling Structure
86.8%
Houses
12.9%
Townhouse
0.3%
Apartment
Tenure
Tenure in Trigg favours outright ownership strongly: 49.1% own without a mortgage, 39.2% carry one, and only 11.7% rent. This 49.1% outright ownership rate is unusually high and points to a resident base that purchased well before recent price rises. The stock is almost entirely separate houses at 86.8%, with semi-detached at 12.9% and apartments negligible at 0.3%. Four-plus bedroom homes make up 51.1% of dwellings and three-bedroom homes 36.7%, so the suburb overwhelmingly caters to families rather than singles or couples. Mortgage repayments average $3,000 per month and rent averages $485 per week. The vacancy rate of 8.0% sits above typical metro WA levels, suggesting that the small rental segment experiences periodic oversupply despite the suburb's overall desirability.
Mortgage / mo
$3,000
Rent / wk
$485
HH Size
2.7
Personal Income / wk
$1,110
Vacancy Ratei% of dwellings unoccupied on Census night (ABS 2021)
8.0%
Unoccupied
87
Rent / IncomeiMedian rent as % of household income. Over 30% = housing stress
17.5%
Mortgage / IncomeiMedian mortgage as % of household income. Over 30% = housing stress
24.9%
Community Profile
Languages Spoken at Home
Ancestry
Household Composition
25.5%
Couples, no children
2,374
Total families
Economy & Employment
The top industries by employment are Healthcare (16.6%, 178 workers), Professional/Tech (15.5%, 166) and Education (12.8%, 137), with Construction (10.9%) and Mining (8.5%) rounding out the top five. By occupation, Professionals (520) and Managers (268) dominate, which aligns with the suburb's SEIFA IEO decile 9 score for education and occupation advantage, above the state and national medians. The unemployment rate is 3.6% and the full-time employment rate is 56.4%. Participation at 62.1% is moderate, because the aging profile means 699 residents are not in the labour force. Real income grew 5.9% over the decade. Volunteering at 22.9% is notably high compared to national norms, a feature of established, professionally employed communities with time and social capital to give.
Unemployment
1.2%
Labour Force
5,102
Unemployed
61
Quarterly Trend
Source: SALM Dec-25
Socio-Economic Indexes (SEIFA)iABS index ranking suburbs from 1 (most disadvantaged) to 10 (most advantaged)
Full-time
56.4%
Part-time
40.0%
Participation
62.1%
Employed
1,394
Occupations
Top Industries
University
50.9%
Postgraduate
11.8%
Born Overseas
22.7%
Dwellings
999
Transport to Work
Transport is heavily car-dependent: 90.3% drive to work, compared to the national average, and public transport use sits at just 2.0%. Walking and cycling account for 2.6%, typical for a coastal suburb with limited transit infrastructure. No schools are recorded inside Trigg's 2.38 km2 boundary, so families depend on institutions in neighbouring suburbs. Crime data is not available for this dataset; however, as an indirect measure, Trigg scores decile 10 on IRSD, the top advantage tier nationally for relative disadvantage, and only 3.1% of residents (85 people) need daily assistance despite the older median age of 43. Housing stress is absent, with rent-to-income at 17.5% and mortgage-to-income at 24.9%, both well below national stress thresholds.
Drive
90.3%
Public Transport
2.0%
Walk / Cycle
2.6%
Work from Home
N/A
Population Forecast
+0.99%/yr
(+89 people/yr)
EstablishedPopulation growth runs at 0.99% per year, adding roughly 89 residents annually. Overseas migration is the dominant driver at 124 net arrivals per year, comfortably above internal flows of 23. The 10-year population change was 15.0%, above the national average for established coastal suburbs. Medium forecasts project the broader SA2 population rising from 8,951 in 2025 to 9,300 by 2031. Rent growth of 22.7% over the period outpaced real income growth of 5.9%, tightening affordability slightly, though the affordability trend is still classified as improving, moving from 39.9% in 2011 to 37.6% in 2021. The gentrification score of 22 places Trigg at an early-signs stage, with signals of accelerating professional share and population growth since 2011.
Historical + Forecast
Hamilton-Perry + Holt smoothing on ERP 2001-2025
Age Cohort Forecast
Primary Driver
Overseas Migration
Net Overseas / yr
+124
Net Internal / yr
+23
Gentrification Signal
Early signs
Population +20% since 2011, Accelerating: 7% → 12%
National Ranking iPercentile rank among ~15,000 AU suburbs. 90% = higher than 90% of suburbs
How Trigg compares to ~15,000 Australian suburbs
Frequently Asked Questions
Is Trigg a good suburb to live in?
Trigg scores decile 10 on IRSD, the top national tier for low disadvantage, and decile 9 on IRSAD and IEO. Household income sits in the 96th percentile nationally, and 50.9% of residents hold university qualifications, 20.8 points above the national figure. The main trade-off is heavy car dependence, with 90.3% of residents driving to work and public transport use at just 2.0%.
What is the median house price in Trigg?
The median house price is estimated at $679,000 based on 2025 rental data. Weekly rent averages $485 and monthly mortgage repayments run about $3,000, giving a mortgage-to-income ratio of 24.9%, well below the 30% stress threshold. At 49.1% outright ownership, most residents have no mortgage at all.
What schools are in Trigg?
No schools are recorded inside the 2.38 km2 Trigg boundary in this dataset, so families rely on institutions in neighbouring suburbs. Despite this, the local population is among the most educated in WA, with 50.9% holding university qualifications, which is 20.8 points above the national average.
Is Trigg safe?
Detailed crime statistics are not available for Trigg in this dataset. As an indirect measure, Trigg scores decile 10 on the IRSD index of relative disadvantage, the highest tier nationally, and only 3.1% of its 2,855 residents (about 85 people) need daily assistance. Both indicators are consistent with a very low-disadvantage, low-crime-risk area.
Is Trigg good for property investment?
Rent of $485 per week against a $679,000 median implies a gross yield of about 3.7%, modest but above inner-city WA levels. The vacancy rate of 8.0% signals some softness in the small rental pool, which at 11.7% is one of the lowest renter shares of any suburb at this income level. Population growth at 0.99% annually and overseas migration of 124 per year provide steady underlying demand.
How is Trigg's population changing?
Trigg's population grows at 0.99% per year, adding about 89 residents annually. The 10-year change was 15.0%, above the national trend for established coastal suburbs. Overseas migration drives growth at 124 net arrivals per year. The profile is aging: the senior share rose 6.1 points over the decade, while the working-age share fell 5.5 points.
What is the demographic makeup of Trigg?
The median age is 43, which is 3 years above the national figure. Ancestry is predominantly Anglo-Celtic: English (1,193 residents), Irish (348) and Scottish (313) lead, followed by Italian (259). Overseas-born residents account for 22.7% of the population. The household size averages 2.7, reflecting the dominance of family households, with 1,049 couples with children recorded.
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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