Trigg

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

Based on ABS population updates and AreaSearch validations, as of Nov 2025 the Trigg statistical area (Lv2) has an estimated population of around 3,146. This is a 10.2% increase from the 2021 Census figure of 2,855 people. The change is inferred from AreaSearch's estimate of 3,144 residents following examination of ABS ERP data released in June 2024 and an additional 18 validated new addresses since the Census date. This results in a population density ratio of 1,321 persons per square kilometer, above the national average assessed by AreaSearch. The Trigg's (SA2) growth rate of 10.2% since the 2021 census exceeds the national average of 9.7%. Overseas migration contributed approximately 72.0% of overall population gains during recent periods, with all drivers including natural growth and interstate migration being positive factors.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area released in 2024 using a base year of 2022. For areas not covered by this data and to estimate growth post-2032, AreaSearch utilises growth rates by age cohort provided by the ABS in its latest Greater Capital Region projections released in 2023 based on 2022 data. Considering projected demographic shifts, an above median population growth is projected for statistical areas analysed by AreaSearch. The Trigg (SA2) is expected to increase by 610 persons to reach a total of 3,756 by 2041, reflecting a 19.2% increase over the 17-year period.

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

AreaSearch analysis of ABS building approval numbers shows Trigg has received around 10 dwelling approvals annually. From FY-21 to FY-25, approximately 54 homes were approved, with another 7 approved in FY-26.

This results in about 4.4 new residents per year per dwelling constructed over the past five financial years. Demand significantly exceeds supply, leading to price growth and increased buyer competition. Developers target the premium market segment, with an average construction cost of $1,442,000 per dwelling. Compared to Greater Perth, Trigg has 18.0% less new development per person but ranks in the 70th percentile nationally.

Recent periods show increased development activity, reflecting the area's maturity and possible planning constraints. New developments consist of 83.0% standalone homes and 17.0% medium to high-density housing, maintaining Trigg's traditional suburban character. With around 188 people per approval, Trigg is a developing area expected to grow by 604 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 46thth percentile nationally

Changes to local infrastructure significantly impact an area's performance. AreaSearch has identified four projects likely to affect this region: Sorrento Beach Estate Stage 3 Release, Karrinyup Bus Depot Transformation, Coastal Boardwalk Feasibility Study, and Star Swamp Bushland Reserve Conservation Upgrades. The following list details those most relevant.

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 an educated workforce with strong professional services representation. The unemployment rate was 1.0% in the past year, with estimated employment growth of 4.2%.

As of September 2025, 1,825 residents are employed, with a 3.0% lower unemployment rate than Greater Perth's 4.0%. Workforce participation is similar to Greater Perth's at 65.2%. Dominant sectors include health care & social assistance, professional & technical, and education & training. Trigg specializes in professional & technical services, with an employment share of 1.6 times the regional level.

Transport, postal & warehousing is under-represented, at 1.6% compared to Greater Perth's 4.7%. Employment opportunities appear limited locally based on Census data analysis. In the past year, employment increased by 4.2% while labour force grew by 3.7%, reducing unemployment by 0.5 percentage points. Greater Perth had employment growth of 2.9% and a marginal rise in unemployment rate. State-level data to 25-Nov shows WA employment contracted by 0.27%, with an unemployment rate of 4.6%. National forecasts project employment expansion by 6.6% over five years and 13.7% over ten years, but growth rates vary between sectors. Applying these projections to Trigg's mix suggests local employment should increase by 7.0% over five years and 14.2% over ten years.

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 2023 shows that Trigg suburb's median income is $70,223 and average income is $111,312. This compares to Greater Perth's median income of $60,748 and average income of $80,248. Using Wage Price Index growth of 9.62% since financial year 2023, estimated incomes as of September 2025 would be approximately $76,978 (median) and $122,020 (average). The 2021 Census data ranks Trigg's household, family, and personal incomes highly nationally, between the 86th and 94th percentiles. In Trigg, 35.9% of locals (1,129 people) earn $4000+, differing from metropolitan Perth where $1,500 - 2,999 dominates with 32.0%. Economic strength is evident in 47.5% of households earning over $3,000 weekly, supporting elevated consumer spending. After housing costs, residents retain 88.2% of income, reflecting strong purchasing power. Trigg'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

The dwelling structure in Trigg, as per the latest Census, consisted of 86.8% houses and 13.2% other dwellings (semi-detached, apartments, 'other' dwellings). In comparison, Perth metro had 59.6% houses and 40.4% other dwellings. Home ownership in Trigg stood at 49.0%, with mortgaged dwellings at 39.3% and rented ones at 11.6%. The median monthly mortgage repayment was $3,000, higher than Perth metro's average of $1,950. The median weekly rent in Trigg was $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, 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

Trigg has a notably high level of educational attainment among its residents aged 15 and above, with 44.9% holding university qualifications. This figure exceeds both the Western Australian state average of 27.9% and the larger Statistical Area Level 4 (SA4) region's average of 29.0%. The area's high educational attainment is led by Bachelor degrees, held by 31.0% of residents in this age group, followed by postgraduate qualifications at 9.4%, and graduate diplomas at 4.5%. Vocational credentials are also prominent, with 26.9% of residents aged 15 and above possessing them.

This includes advanced diplomas held by 11.5% and certificates by 15.4%. Educational participation in Trigg is notably high, with 30.4% of residents currently enrolled in formal education. This includes 10.3% in primary education, 9.1% in secondary education, and 6.5% pursuing tertiary education.

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

Transport analysis shows 12 active stops operating within Trigg, offering mixed bus services. These stops are served by 2 routes, collectively offering 356 weekly passenger trips. Transport access 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's health outcomes show excellent results with a low prevalence of common health conditions across all age groups. Approximately 71% of Trigg's total population (2,245 people) have private health cover, compared to Greater Perth's 60.5%. Nationally, the average is 55.7%.

The most prevalent medical conditions are arthritis and asthma, affecting 6.8% and 5.8% of residents respectively. A total of 75.2% of residents report no medical ailments, compared to Greater Perth's 73.0%. Trigg has a higher proportion of seniors aged 65 and over at 21.9% (688 people), compared to Greater Perth's 18.3%. Notably, health outcomes among seniors in Trigg are stronger than those of the general population.

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

Trigg's population showed low cultural diversity, with 77.3% born in Australia and 92.0% being citizens. English was the only language spoken at home by 93.2%. Christianity dominated Trigg's religion at 51.8%, while Judaism was overrepresented at 0.2% compared to Greater Perth's 1.4%.

In ancestry, English (29.7%) and Australian (27.1%) groups were substantially higher than regional averages of 23.5% and 18.8% respectively. Irish ancestry was present at 8.7%. Notable divergences included French at 0.9% in Trigg versus region's 0.6%, South African at 1.0% (matching regional average), and Italian at 6.4% compared to Greater Perth's 7.2%.

Trigg hosts a notably older demographic compared to the national average

The median age in Trigg is 43 years, which is higher than Greater Perth's average of 37 years and exceeds the national average of 38 years. The age profile shows that those aged 75-84 are particularly prominent, making up 8.1% of the population. Conversely, the 25-34 age group comprises only 6.8%. Between 2021 and present, the percentage of 75-84 year-olds has increased from 6.7% to 8.1%, while the 65-74 age cohort has decreased from 11.5% to 10.2%. Looking ahead to 2041, demographic projections indicate significant shifts in Trigg's age structure. The 85+ age group is projected to grow exceptionally, expanding by 191 people (169%) from 113 to 305. Notably, the combined 65+ age groups are expected to account for 60% of total population growth. Conversely, the 0-4 and 35-44 age cohorts are projected to experience population declines.