Treeby

Treeby lies within the top 10% of areas nationally in terms of population growth performance according to AreaSearch analysis of short and medium-term trends

Based on ABS population updates and AreaSearch's analysis, the estimated population of Treeby as of February 2026 is around 6,952. This reflects a significant increase from the 2021 Census figure of 4,214 people, marking a growth of 2,738 individuals (65.0%). AreaSearch's estimation considers the resident population of 6,792, based on examination of the latest ERP data release by the ABS in June 2024, and an additional 849 validated new addresses since the Census date. This results in a density ratio of 843 persons per square kilometer, comparable to averages seen across other locations assessed by AreaSearch. The suburb's population growth rate exceeded both national (9.9%) and state averages, making it a notable growth leader in the region. Interstate migration contributed approximately 49.0% of overall population gains during recent periods, with all drivers including overseas migration and natural growth being positive factors.

AreaSearch uses ABS/Geoscience Australia projections for each SA2 area, released in 2024 using 2022 as the base year. For areas not covered by this data, 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). Future population dynamics anticipate a significant increase in the top quartile of national statistical areas, with Treeby expected to expand by 1,549 persons to reach 8,501 by 2041, reflecting an overall reduction of 6.1% over the 17-year period.

AreaSearch assessment of residential development activity positions Treeby among the top 25% of areas assessed nationwide

AreaSearch analysis of ABS building approval numbers indicates Treeby has seen approximately 237 new homes approved annually over the past five financial years, totalling an estimated 1,187 homes. As of FY26, 73 approvals have been recorded. The average new residents per year per dwelling constructed between FY21 and FY25 is 0.8. This suggests that new construction in Treeby is meeting or exceeding demand, providing more options for buyers and potentially driving population growth beyond current projections.

The average value of new dwellings under development is $467,000, indicating a focus on the premium segment with upmarket properties. In FY26, commercial development approvals totalling $24.9 million have been recorded in Treeby, suggesting steady commercial investment activity. Compared to Greater Perth, Treeby records 479.0% more construction activity per person, offering greater choice for buyers despite recent moderation in development activity. This high level of activity reflects strong developer confidence in the area. All new construction in Treeby since FY21 has been comprised of detached houses, maintaining the area's traditional low density character and appealing to those seeking family homes with space.

This focus on detached housing is more pronounced than current patterns suggest (79.0% at Census), indicating robust demand for family homes despite increasing density pressures. Treeby has approximately 24 people per dwelling approval, suggesting an expanding market. However, population projections indicate stability or decline, which may reduce housing demand pressures and benefit potential buyers in the area.

Treeby has moderate levels of nearby infrastructure activity, ranking in the 47thth percentile nationally

Changes to local infrastructure significantly influence an area's performance. AreaSearch has identified 25 projects likely to impact the area. Key projects include Provence Estate, Treeby Village, Treeby East Primary School (Planning Name), and Calleya Estate by Stockland. The following list details those most relevant.

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

Denotes AI-based impression for illustrative purposes only, not to be taken as definitive under any circumstances. Please follow links and conduct other investigations from the project's source for actual imagery. Developers and project owners wishing us to use original imagery please Contact Us and we will do so.

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

Treeby has a highly educated workforce with essential services sectors well represented. The unemployment rate is 0.8%, and there was an estimated 5.2% employment growth in the past year based on AreaSearch aggregation of statistical area data. As of September 2025, 3442 residents are employed while the unemployment rate is 3.1% below Greater Perth's rate of 4.0%.

Workforce participation in Treeby lags at 60.9%, compared to Greater Perth's 71.6%. Only 8.0% of residents work from home, considering Covid-19 lockdown impacts. Leading employment industries among residents include health care & social assistance, professional & technical services, and construction. Treeby shows strong specialization in health care & social assistance with an employment share of 1.2 times the regional level, while accommodation & food is under-represented at 4.8% compared to Greater Perth's 6.8%.

The area appears to offer limited local employment opportunities as indicated by the Census working population count versus resident population. Between September 2024 and September 2025, employment increased by 5.2%, while labour force increased by 5.2%, keeping unemployment broadly flat. In contrast, Greater Perth experienced employment growth of 2.9% and labour force growth of 3.0%. Jobs and Skills Australia's national employment forecasts from May-25 suggest that national employment will expand by 6.6% over five years and 14.1% over ten years. Applying these projections to Treeby's employment mix, local employment is estimated to increase by 6.7% over five years and 14.1% over ten years, based on a simple weighting extrapolation for illustrative purposes.

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 Treeby's median income among taxpayers is $72,694. The average income is $86,768. Both figures are among the highest in Australia. Greater Perth's median income is $60,748 with an average of $80,248. Based on Wage Price Index growth of 9.62% since financial year 2023, current estimates for Treeby would be approximately $79,687 (median) and $95,115 (average) as of September 2025. Census data shows household, family and personal incomes in Treeby rank highly nationally, between the 90th and 90th percentiles. Income brackets indicate that 39.9% of locals (2,773 people) earn between $1,500 - 2,999 weekly, which is consistent with broader trends across the broader area showing 32.0% in the same category. A significant 37.1% earn above $3,000 weekly. High housing costs consume 15.6% of income, but strong earnings place disposable income at the 89th percentile nationally. The area's SEIFA income ranking places it in the 8th decile.

Treeby is characterized by a predominantly suburban housing profile, with ownership patterns similar to the broader region

Treeby's dwelling structures, as per the latest Census, consisted of 79.0% houses and 21.0% other dwellings (semi-detached, apartments, 'other' dwellings), compared to Perth metro's 77.8% houses and 22.1% other dwellings. Home ownership in Treeby stood at 16.0%, with mortgaged dwellings at 68.6% and rented ones at 15.4%. The median monthly mortgage repayment was $2,000, exceeding Perth metro's average of $1,907. The median weekly rent in Treeby was $450, higher than Perth metro's $350. Nationally, Treeby's mortgage repayments surpassed the Australian average of $1,863, while rents were substantially above the national figure of $375.

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

Family households account for 81.6% of all households, including 41.2% couples with children, 33.2% couples without children, and 6.3% single parent families. Non-family households constitute the remaining 18.4%, with lone person households at 14.9% and group households comprising 3.6%. The median household size is 2.7 people, which is larger than the Greater Perth average of 2.6.

Treeby shows strong educational performance, ranking in the upper quartile nationally when assessed across multiple qualification and achievement indicators

Educational attainment in Treeby is notably higher than broader averages. Among residents aged 15 and above, 43.3% have university qualifications, compared to 27.4% in the SA3 area and 27.9% across Western Australia as a whole. Bachelor degrees are most prevalent at 30.4%, followed by postgraduate qualifications (9.6%) and graduate diplomas (3.3%). Vocational credentials are also common, with 31.7% of residents holding such qualifications, including advanced diplomas (11.5%) and certificates (20.2%).

Furthermore, a significant portion of the population is actively engaged in education, with 24.4% pursuing formal learning opportunities. This includes 7.3% in primary education, 5.8% in tertiary education, and 4.9% in secondary education.

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

Treeby has 15 active public transport stops, all of which are bus stops. These stops are served by four different routes that together facilitate 1,003 weekly passenger trips. The area's transport accessibility is deemed good, with residents usually located 346 meters from their nearest transport stop. As a predominantly residential zone, most Treeby residents commute outwards. Cars remain the primary mode of transportation at 78%, while trains are used by 16% of residents. On average, there are 1.6 vehicles per dwelling in Treeby.

According to the 2021 Census, only 8.0% of residents work from home, which may be influenced by COVID-19 conditions. Across all routes, an average of 143 trips per day is recorded, translating to approximately 66 weekly trips per individual stop.

Treeby's residents are extremely healthy with younger cohorts in particular seeing very low prevalence of common health conditions

Analysis of health metrics shows strong performance throughout Treeby. AreaSearch's assessment indicates low mortality rates and chronic condition prevalence, particularly among younger cohorts who have a very low prevalence of common health conditions. Private health cover is exceptionally high at approximately 62% of the total population (4,285 people), compared to 59.0% across Greater Perth and 55.7% nationally.

The most common medical conditions in Treeby are mental health issues and asthma, impacting 6.7% and 6.1% of residents respectively. A total of 78.0% of residents declare themselves completely clear of medical ailments, compared to 71.9% across Greater Perth. The area has 12.9% of residents aged 65 and over (896 people), which is lower than the 16.3% in Greater Perth. Health outcomes among seniors present some challenges but rank lower nationally than those of the broader population.

Treeby is among the most culturally diverse areas in the country based on AreaSearch assessment of a range of language and cultural background related metrics

Treeby has a high cultural diversity, with 35.0% speaking a language other than English at home and 46.8% born overseas. Christianity is the main religion in Treeby, comprising 44.8%. Hinduism is overrepresented, making up 8.3%, compared to Greater Perth's average of 2.5%.

The top three ancestry groups are English (22.0%), Australian (18.7%), and Other (15.1%). Some ethnic groups show notable divergences: South African at 1.5% (vs regional 1.0%), Filipino at 3.9% (vs 1.4%), and Spanish at 0.8% (vs 0.4%).

Treeby hosts a very young demographic, ranking in the bottom 10% of areas nationwide

Treeby's median age is 33 years, which is younger than Greater Perth's figure of 37 years and Australia's national average of 38 years. Compared to Greater Perth, Treeby has a higher proportion of residents aged 25-34 (26.6%) but fewer residents aged 5-14 (7.5%). This concentration of 25-34 year-olds is notably higher than the national figure of 14.4%. Between the 2021 Census and the present, the proportion of Treeby's population aged 55-64 has grown from 5.9% to 7.5%, while the proportion of those aged 75-84 has increased from 3.1% to 4.4%. Conversely, the proportion of residents aged 5-14 has decreased from 9.4% to 7.5%. Population forecasts for Treeby in 2041 indicate significant demographic shifts. The 75-84 age cohort is projected to grow by 50%, adding 154 residents to reach a total of 460. This growth is primarily due to demographic aging, with residents aged 65 and older accounting for 93% of anticipated population growth. Meanwhile, the 45-54 and 15-24 age cohorts are expected to experience population declines.