Trigg

Trigg has seen population growth performance typically on par with national averages when looking at short and medium term trends

The population of Trigg, as estimated based on analysis of ABS updates and AreaSearch validations, is around 3,166 as of November 2025. This figure represents an increase of 311 people since the 2021 Census, which reported a population of 2,855 in Trigg. The current estimate is inferred from AreaSearch's resident population estimate of 3,165 following examination of ABS ERP data release in June 2024 and validation of 18 new addresses since the Census date. This results in a population density ratio of 1,330 persons per square kilometer, higher than the average across national locations assessed by AreaSearch. Trigg's growth rate of 10.9% since the 2021 census exceeded the national average of 8.9%. Overseas migration contributed approximately 72.0% of overall population gains in recent periods, with other drivers such as natural growth and interstate migration also being positive factors.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered by this data, AreaSearch utilises growth rates by age cohort provided by the ABS in its Greater Capital Region projections released in 2023, based on 2022 data. Considering these projections, an above median population growth is expected for Trigg, with an increase of 609 persons projected to reach a total of 3,775 by 2041, reflecting an overall increase of 18.4% over the 17-year period.

Recent residential development output has been above average within Trigg when compared nationally

Trigg has received approximately 10 dwelling approvals annually based on AreaSearch analysis. From FY-21 to FY-25, around 54 homes were approved, with another 3 in FY-26. This results in an estimated 4.4 new residents per year per dwelling constructed over the past five financial years.

The demand for housing significantly exceeds supply, leading to potential price growth and increased buyer competition. Developers target the premium market segment, with average construction values of $1,442,000. This financial year, Trigg has recorded $175,000 in commercial development approvals, indicating a predominantly residential focus. Compared to Greater Perth, Trigg has 18.0% less new development per person but ranks among the 72nd percentile nationally.

However, recent periods have seen increased development activity. New development consists of 82.0% standalone homes and 18.0% medium and high-density housing, maintaining Trigg's traditional suburban character. With approximately 177 people per approval, Trigg reflects a developing area. According to the latest AreaSearch quarterly estimate, Trigg is expected to grow by 583 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.

Trigg has moderate levels of nearby infrastructure activity, ranking in the top 50% nationally

Four projects are identified by AreaSearch as potentially impacting the area: Sorrento Beach Estate - Stage 3 Release, Karrinyup Bus Depot Transformation, Coastal Boardwalk Feasibility Study, and Star Swamp Bushland Reserve Conservation Upgrades.

Professional plan users can use the search below to filter and access additional projects.

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The exceptional employment performance in Trigg places it among Australia's strongest labour markets

Trigg has a highly educated workforce with strong representation in professional services. The unemployment rate was 1.0% as of June 2025, which is lower than Greater Perth's rate of 3.9%.

Employment growth over the past year was estimated at 4.4%. As of June 2025, 1,816 residents were in work and workforce participation was broadly similar to Greater Perth's 65.2%. The dominant employment sectors include health care & social assistance, professional & technical, and education & training. Trigg has a particularly strong specialization in professional & technical services, with an employment share of 1.6 times the regional level.

However, transport, postal & warehousing is under-represented, with only 1.6% of Trigg's workforce compared to Greater Perth's 4.7%. Employment opportunities locally may be limited as indicated by the count of Census working population vs resident population. In the 12-month period ending June 2025, employment increased by 4.4% alongside labour force increasing by 4.0%, causing the unemployment rate to fall by 0.4 percentage points. This contrasts with Greater Perth's employment growth of 3.7% and labour force growth of 3.8%, which resulted in a 0.1 percentage point rise in unemployment rate. Jobs and Skills Australia's national employment forecasts from Sep-22 project that national employment will expand by 6.6% over five years and 13.7% over ten years. Applying these projections to Trigg's employment mix suggests local employment should increase by 7.0% over five years and 14.2% over ten years, though this is a simple weighting extrapolation for illustrative purposes and does not take into account localised population projections.

The economic profile demonstrates exceptional strength, placing the area among the top 10% nationally based on comprehensive AreaSearch income analysis

AreaSearch's latest postcode level ATO data for financial year 2022 shows that income in Trigg is among the top percentile nationally. The median assessed income is $70,223 while the average income stands at $111,312. This contrasts with Greater Perth's figures of a median income of $58,380 and an average income of $78,020. Based on Wage Price Index growth of 14.2% since financial year 2022, current estimates would be approximately $80,195 (median) and $127,118 (average) as of September 2025. According to the 2021 Census, household, family and personal incomes in Trigg rank highly nationally, between the 86th and 94th percentiles. The data shows that 35.9% of locals (1,136 people) fall into the $4000+ income category, differing from metropolitan patterns where the $1,500 - 2,999 range dominates with 32.0%. Economic strength is evident through 47.5% of households achieving high weekly earnings exceeding $3,000, supporting elevated consumer spending. After housing costs, residents retain 88.2% of income, reflecting strong purchasing power and the area's SEIFA income ranking places it in the 10th decile.

Trigg is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership

In Trigg, as per the latest Census evaluation, 86.8% of dwellings were houses with the remaining 13.2% being other types such as semi-detached homes and apartments. This is compared to Perth metropolitan area's 59.6% houses and 40.4% other dwellings. Home ownership in Trigg stood at 49.0%, with mortgaged properties at 39.3% and rented ones at 11.6%. The median monthly mortgage repayment in the area was $3,000, higher than Perth metro's average of $1,950. The median weekly rent in Trigg was recorded at $485, compared to Perth metro's $350. Nationally, Trigg's mortgage repayments were significantly higher than the Australian average of $1,863, while rents were substantially above the national figure of $375.

Trigg features high concentrations of family households, with a higher-than-average median household size

Family households constitute 78.0% of all households, including 41.9% couples with children, 29.7% couples without children, and 6.2% single parent families. Non-family households comprise the remaining 22.0%, with lone person households at 18.4% and group households making up 3.5%. The median household size is 2.7 people, which is larger than the Greater Perth average of 2.4.

Trigg demonstrates exceptional educational outcomes, ranking among the top 5% of areas nationally based on AreaSearch's comprehensive analysis of qualification and performance metrics

In Trigg, 44.9% of residents aged 15 years and above have university qualifications, surpassing both Western Australia's state average of 27.9% and the SA4 region's average of 29.0%. This high educational attainment is dominated by bachelor degrees at 31.0%, followed by postgraduate qualifications (9.4%) and graduate diplomas (4.5%). Vocational credentials are also prevalent, with 26.9% of residents aged 15 years and above holding such qualifications, including advanced diplomas (11.5%) and certificates (15.4%). Educational participation is notably high in Trigg, with 30.4% of residents currently enrolled in formal education, comprising 10.3% in primary education, 9.1% in secondary education, and 6.5% pursuing tertiary education.

Educational facilities appear to be located outside the immediate catchment boundaries, requiring families to access schools in neighboring areas.

Transport servicing is low compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

Transport analysis in Trigg shows 12 active public transport stops operating. These are mixed bus routes. There are 2 individual routes serving these stops, providing a total of 356 weekly passenger trips.

Transport accessibility is rated good, with residents typically located 233 meters from the nearest stop. Service frequency averages 50 trips per day across all routes, equating to approximately 29 weekly trips per individual stop.

Trigg's residents boast exceedingly positive health performance metrics with very low prevalence of common health conditions across all age groups

Trigg demonstrates excellent health outcomes with very low prevalence of common health conditions across all age groups. The rate of private health cover is exceptionally high at approximately 71% of the total population (2,260 people), compared to 59.9% across Greater Perth and a national average of 55.3%. The most common medical conditions are arthritis and asthma, affecting 6.8% and 5.8% of residents respectively.

A significant majority, 75.2%, report being completely clear of medical ailments compared to 73.0% across Greater Perth. Trigg has a higher proportion of seniors aged 65 and over at 21.9% (693 people), compared to 18.3% in Greater Perth. Health outcomes among seniors are particularly strong, outperforming the general population in health metrics.

Trigg ranks below the Australian average when compared to other local markets across a number of language and cultural background related metrics

Trigg had a cultural diversity index below the average, with 77.3% born in Australia, 92.0% being citizens, and 93.2% speaking English only at home. Christianity was the predominant religion, comprising 51.8%. Judaism, however, was overrepresented at 0.2%, compared to Greater Perth's 1.4%.

In ancestry, the top three groups were English (29.7%), Australian (27.1%), and Irish (8.7%), all higher than regional averages of 23.5%, 18.8%, respectively. French (0.9%) was overrepresented compared to the region's 0.6%. South African representation matched the regional average at 1.0%. Italian, however, was underrepresented at 6.4% versus the regional 7.2%.

Trigg hosts an older demographic, ranking in the top quartile nationwide

The median age in Trigg is 43 years, considerably higher than Greater Perth's average of 37 years and substantially exceeding the national average of 38 years. The age profile shows that those aged 75-84 years make up 8.1%, while those aged 25-34 years comprise 6.8%. Between 2021 and present, the 75-84 age group has grown from 6.7% to 8.1% of the population. Conversely, the 65-74 age group has declined from 11.5% to 10.2%. By 2041, demographic projections reveal significant shifts in Trigg's age structure. The 85+ age cohort is projected to grow exceptionally, expanding by 191 people (168%) from 113 to 305. Notably, the combined 65+ age groups will account for 61% of total population growth, reflecting Trigg's aging demographic profile. Conversely, the 0-4 and 35-44 cohorts are expected to experience population declines.