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This analysis uses ABS Statistical Areas Level 2 (SA2) boundaries, which can materially differ from Suburbs and Localities (SAL) even when sharing similar names.
SA2 boundaries are defined by the Australian Bureau of Statistics and are designed to represent communities for statistical reporting (e.g., census and ERP).
Suburbs and Localities (SAL) represent commonly-used suburb/locality names (postal-style areas) and may use different geographic boundaries. For comprehensive analysis, consider reviewing both boundary types if available.
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ABS ERP | -- people | --
2021 Census | -- people
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Diddillibah - Rosemount has an estimated 4,733 residents, up from 4,403 at the 2021 Census — a change of 330 people, or 7.5%. Growth has averaged 1.8% a year over five years. Overseas migration accounts for 50.7% of that increase. That puts 151 residents on each square kilometre. Population is estimated from ABS Estimated Resident Population releases and GNAF address data, re-based from the 2021 Census and updated annually.
Detail
According to research conducted by AreaSearch, the population of Diddillibah - Rosemount stands at roughly 4,733 as of Aug 2026. This represents an expansion of 330 people (7.5%) compared to the 2021 Census tally of 4,403 people. That growth is determined by taking the ABS estimated resident population figure of 4,731 from June 2025 alongside an extra 39 validated new addresses added post-Census. Consequently, population density is 151 persons per square kilometer, offering generous personal space and scope for future development. Over the preceding ten years, Diddillibah - Rosemount exhibited steady expansion with a compound annual growth rate of 2.2%, outperforming the Rest of Qld.
The primary engine behind this demographic increase was overseas migration, generating roughly 50.7% of total net gains recently, alongside positive contributions from natural growth and interstate migration. Projections published in 2024 by ABS/Geoscience Australia utilizing 2022 as a baseline are applied by AreaSearch for SA2 areas. For locations excluded from that dataset, as well as all projections beyond 2032, figures released in 2023 by the Queensland State Government using 2021 data are used instead. Because the state-level figures omit breakdowns across age brackets, AreaSearch incorporates proportional age weightings aligned with the ABS Greater Capital Region projections (published in 2023 from 2022 data). Looking ahead, demographic modeling points to growth tracking slightly under the non-metropolitan national median, with Diddillibah - Rosemount projected to expand by 487 persons to 2041 relative to the newest annual ERP figures, representing an overall increase of 10.2% across the 16 years.
Frequently Asked Questions - Population
101 new dwellings have been approved in Diddillibah - Rosemount over the past five years, an average of 20 a year. That places the area in the 54th percentile for residential development activity nationally, about 4 approvals per 1,000 residents a year. Of the 20 dwellings approved in the latest reporting year, 100% were detached houses and the rest townhouses or apartments. Figures come from ABS building approvals aggregated to this SA2 boundary and are updated monthly as the ABS releases them.
Detail
In Diddillibah - Rosemount, annual dwelling approvals have averaged approximately 20 homes, totaling 101 homes approved throughout the preceding 5 financial years (between FY-22 and FY-26). Over the previous 5 financial years (between FY-22 and FY-26), the area added an average of 3.9 new residents per year for each residential dwelling constructed, indicating that new construction falls far behind incoming demand; this dynamic typically heightens buyer competition and drives upward pressure on real estate pricing, with newly constructed residences averaging an expected construction cost of $591,000. Furthermore, $3.3 million in commercial development approvals was registered during this financial year, underscoring the locality's predominantly residential character.
Per capita dwelling approval figures for Diddillibah - Rosemount sit at roughly three-quarters of the level recorded across Rest of Qld, positioning the locality in the 45th percentile across all assessed areas nationally; this constraint limits housing choices for buyers while bolstering demand across established housing stock. Furthermore, recent residential building activity consists exclusively of detached houses, maintaining the neighborhood's low-density environment and appealing to purchasers seeking larger lot sizes. A ratio of 359 people per dwelling approval within the district underscores a tranquil, modest property development environment. Demographic projections indicate an addition of 485 residents across Diddillibah - Rosemount through to 2041 relative to the newest quarterly figure from AreaSearch. If building activity continues at current rates, future residential supply is positioned to satisfy demand, fostering supportive buyer conditions and potentially facilitating growth above current projections.
Frequently Asked Questions - Development
Development applications around Diddillibah - Rosemount
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| Lodged | Address | Description | Type | Distance | Status |
|---|
SOURCE: Planning portals and council registers, compiled by AreaSearch. Distance & bearing measured from the suburb midpoint.
AreaSearch tracks 4 current infrastructure and development projects inside Diddillibah - Rosemount, worth an estimated $31 million. A further 131 sit in the immediately surrounding suburbs, taking the tracked pipeline within reach of the area to $14.2 billion. 43 are already under construction and 56 are due for completion within three years. The pipeline spans residential development, communities, precincts & urban renewal and transport & logistics. Records are compiled from Infrastructure Australia, state agencies, council planning portals and public announcements, reviewed and updated daily, then ranked by proximity, construction stage, completion horizon and project scale.
Detail
Infrastructure investments, public works, and planning developments serve as fundamental drivers of local economic trajectory. AreaSearch has pinpointed a total of 19 projects positioned to impact the district. Significant undertakings encompass the Summer Breeze Estate, Good Samaritan Catholic College Expansion, Parklakes Central (Bli Bli Northern Village), and the Bruce Highway Upgrade - Maroochydore Road to Mons Road, with key developments highlighted in the accompanying schedule.
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Frequently Asked Questions - Infrastructure
Petrie Creek Road Upgrade
Sunshine Coast Council is undertaking an extensive upgrade along a 1.2 km section of Petrie Creek Road between Paynters Creek Road and Sugar View Lane. Works involve road widening, dedicated on-road cycle lanes, upgraded stormwater drainage culverts, and pavement rehabilitation to improve safety and connectivity.
Nambour Landfill Cell 7 & Environmental Management Upgrade
Sunshine Coast Council is constructing engineered Landfill Cell 7 and delivering environmental infrastructure upgrades at the Nambour Resource Recovery Centre on Cooney Road. The project installs multi-layer composite geosynthetic liners, advanced leachate collection networks, landfill gas capture systems, and stormwater retention basins. Civil containment and environmental works are actively underway.
Parklands Regional Park Development
Recreational trail and amenity development program for Parklands Regional Park funded through Sunshine Coast Council's capital works program. The project delivers infrastructure upgrades, improved public trail access, and enhanced environmental recreation facilities for mountain bikers, trail runners, and bushwalkers.
Summer Breeze Estate
Boutique collection of 7 acreage residential home sites situated in beautiful Rosemount on the Sunshine Coast, offering a semi-rural lifestyle just 15 minutes from Maroochydore CBD.
Big Pineapple Renewal Master Plan
A $150 million master planned rejuvenation of the iconic 170-hectare Big Pineapple site in Woombye into a major tourism, entertainment, and agritourism precinct. Key elements include 793 eco-resort and accommodation units, an agribusiness precinct, a craft brewery and distillery, water park, event spaces, and adventure tourism facilities.
Camp Flat Road Upgrade
Multi-stage road reconstruction and safety upgrade program along Camp Flat Road in Bli Bli adjacent to Parklands. The project delivers road reconstruction, corridor widening, stormwater drainage improvements, and active transport pedestrian pathways.
Sunshine Coast Bioenergy Facility Nambour
Development of landfill biogas capture and renewable electricity generation infrastructure at the Nambour Resource Recovery Centre to support regional methane abatement.
Sunshine Coast Mountain Bike Centre
An international-standard Cross-Country Olympic (XCO) mountain bike venue and community recreation precinct adjacent to Parklands Conservation Park. The project includes a multi-use trail network, trail hub, bike hire, cafe, amenities, parking, and spectator facilities. It is slated to host mountain biking competition during the Brisbane 2032 Olympic and Paralympic Games.
2,290 residents of Diddillibah - Rosemount are employed, from a labour force of 2,359. Unemployment sits at 2.9%, with participation at 60.0%. Weighted for its industry mix, the area's sectors are forecast to grow about 6.7% nationally over five years. That reflects industry composition only and makes no allowance for local population growth. The working-day population is estimated at 4,010, about 85% of the resident population, so more people leave the area for work than travel in. Unemployment and labour force come from ABS Small Area Labour Markets, updated quarterly; the industry and occupation profile is from the 2021 Census.
Detail
The local labour market in Diddillibah - Rosemount is characterized by skilled workers, with significant representation across the construction industry and a low unemployment rate of 2.9%. In March 2026, employed residents numbered 2,290, and the local jobless rate sat 1.0% below the 3.9% recorded across Regional Qld, while labor force participation was comparatively subdued at 60.0% compared to 64.2% in Regional Qld. Census records indicate that 18.1% of workers performed their duties from home, an outcome influenced by Covid-19 pandemic restrictions. A substantial proportion of local workers are engaged in construction, health care & social assistance, and retail trade.
Construction shows notable local concentration, with resident employment levels tracking 1.6 times the regional average. In contrast, agriculture, forestry & fishing accounts for only 2.1% of the workforce, below the 4.5% seen across the broader region. Based on Census comparisons between resident and local workers, this residential suburb provides relatively few internal jobs. According to AreaSearch evaluations of SALM and ABS figures, the labour force shrank by 2.3% during the year to March 2026, while employment fell by 2.7%, causing the unemployment rate to climb by 0.4 percentage points. In contrast, Regional Qld experienced employment growth of 0.1% and labour force growth of 0.3%, with unemployment increasing by 0.1 percentage points. Jobs and Skills Australia's national employment forecasts from Mar-26 provide additional context regarding potential future demand within Diddillibah - Rosemount. These projections, which span five and ten-year periods, have been overlaid onto the local employment profile to estimate growth trajectories. Although national employment is projected to grow by 6.6% over five years and 13.7% over ten years, expansion rates vary considerably across different industry sectors. When these sector-specific forecasts are applied to Diddillibah - Rosemount's employment composition, local employment is expected to rise by 6.7% over five years and 13.7% over ten years (please note this is a simple weighting extrapolation for illustrative purposes and does not take into account localised population projections).
Frequently Asked Questions - Employment
Median household income in Diddillibah - Rosemount is $1,595 a week (about $83,000 a year), with median personal income at $707 a week. ATO records put median taxable income at $50,424 a year against an average of $63,449. Household income is from the 2021 Census; taxable income is from ATO Taxation Statistics for the latest financial year available, indexed forward using the ABS Wage Price Index.
Detail
Taxation statistics from the ATO at postcode level for financial year 2023 evaluated by AreaSearch show local earnings trailing the national standard, recording a median income of $50,424 and an average income of $63,449. For comparison, Regional Qld recorded a median income of $53,146 and an average of $66,593. Factoring in an 11.36% increase in the Wage Price Index since financial year 2023 yields updated estimates of approximately $56,152 (median) and $70,657 (average) as of March 2026. In the 2021 Census, local household, family, and personal income tiers ranked moderately between the 29th and 41st percentiles.
The primary income bracket encompasses 26.6% of taxpayers receiving $1,500 - 2,999 weekly (1,258 residents), compared to 31.7% across the wider region. Mortgage and rental costs create notable pressure, with 83.5% of income remaining after housing costs (41st percentile), placing the area in the 6th decile on the SEIFA income index.
Frequently Asked Questions - Income
Diddillibah - Rosemount had 1,580 occupied dwellings at the 2021 Census, 88% detached houses and 1% apartments. 43% are owned with a mortgage, 12% rented and 45% owned outright. At that Census the median rent was $400 a week and the median mortgage repayment $2,167 a month. Rent absorbs 25.1% of household income here and mortgage repayments 31.4%. Dwelling stock, tenure and housing costs are 2021 Census measures — the only source that counts dwellings at this boundary size.
Detail
At the time of the latest Census, standalone houses accounted for 87.8% of all residences in Diddillibah - Rosemount, while 12.1% were comprised of alternative property types such as semi-detached homes, apartments, and other dwellings; across Regional Qld, houses represented 76.4% and other dwellings accounted for 23.6%. Outright home ownership was substantially higher locally at 45.2% compared to the regional figure, with remaining properties being mortgaged (43.3%) or rented (11.5%). Typical monthly mortgage repayments stood at $2,167, well above the Regional Qld benchmark of $1,655, while median weekly rent was $400 compared to $345 regionally.
On a nationwide scale, monthly home loan payments in Diddillibah - Rosemount exceed the Australian median of $1,863, and weekly rents surpass the national average of $375.
Frequently Asked Questions - Housing
Diddillibah - Rosemount counted 1,580 households at the 2021 Census, an estimated 1,698 today, averaging 2.7 people each. 35% are couples with children, against 31% couples without children. 24% of households are people living alone, and families average 1.8 children. Household and family composition is measured only by the Census, so these are 2021 figures.
Detail
Families constitute the vast majority of local households at 74.4%, comprising couples with children at 35.1%, couples without children at 31.0%, and single parent families at 7.9%. The balance of 25.6% consists of non-family living arrangements, primarily lone person households at 23.5% alongside group households representing 2.1%. The typical household contains 2.7 people, exceeding the Regional Qld average of 2.5.
Frequently Asked Questions - Households
23.0% of adults in Diddillibah - Rosemount hold a university qualification, including 15.9% with a bachelor degree and 4.2% with postgraduate qualifications, higher than 80% of areas nationally. A further 28.5% hold a vocational qualification. 1 school serves the area, with 272 enrolment places and an average ICSEA of 1,104 against a national benchmark of 1,000. Qualifications come from the 2021 Census; school enrolments, ICSEA and results come from ACARA's current release.
Detail
Educational attainment among Diddillibah - Rosemount residents trails national levels, with 23.0% of individuals aged 15+ possessing a higher education degree compared to 30.4% across Australia, pointing to opportunities for further academic and technical upskilling. Among degree holders, bachelor degrees represent 15.9%, postgraduate awards account for 4.2%, and graduate diplomas make up 2.9%. In addition, vocational education is widespread, with 41.0% of the population aged 15+ holding technical qualifications, split between certificates (28.5%) and advanced diplomas (12.5%). A significant share of the population is actively engaged in study, with 27.5% of residents currently enrolled across educational institutions.
Specifically, 9.8% attend primary school, 9.3% are in secondary education, and 3.8% are undertaking tertiary studies.
Frequently Asked Questions - Education
Schools Detail
Getting around Diddillibah - Rosemount means driving: households keep an average of 1.8 vehicles, and no scheduled public transport appears in the current timetable feeds. Service data is built from operators' published GTFS timetables; vehicle ownership is from the 2021 Census.
Frequently Asked Questions - Transport
Transport Stops Detail
66.6% of residents in Diddillibah - Rosemount report no long-term health condition. 6.2% need daily assistance with core activities, and 50.5% hold private health cover. The standardised death rate runs at 4.0 per 1,000 residents. Health conditions, assistance needs and insurance are 2021 Census measures; the death rate comes from current ABS releases.
Detail
According to health metrics compiled by AreaSearch on mortality and chronic illnesses, Diddillibah - Rosemount displays favorable health results; standard medical conditions show reduced prevalence across the community generally and track national rates among senior cohorts, while private health insurance is held by approximately 50% of residents (~2,390 people), below the nationwide benchmark of 55.7%. The two most prevalent health issues recorded locally are arthritis, affecting 10.0% of the population, and asthma, which affects 7.9%, while 66.6% of residents reported having no diagnosed chronic medical ailments compared to 67.6% across Regional Qld.
General health among working-age individuals conforms to typical regional standards. Seniors aged 65 and over represent 24.2% of the population (1,146 people), higher than the 20.3% observed regionally, and health indicators within this demographic remain positive despite placing slightly lower on national comparisons than the broader area.
Frequently Asked Questions - Health
Diddillibah - Rosemount is largely Australian-born, at 80.9% of residents, with 5.0% speaking a language other than English at home. The largest reported ancestries are English (33.8%) and Australian (26.8%). Ancestry, language and country of birth are counted only by the Census, so these are 2021 figures.
Detail
Cultural diversity within Diddillibah - Rosemount sits below standard benchmarks: Australian-born residents comprise 80.9% of the population, 90.3% hold Australian citizenship, and 95.0% speak exclusively English at home. Christianity is the predominant faith, accounting for 49.4% of community members. The most distinct variance appears in the Other religious category, which represents 1.1% locally versus 0.8% across Regional Qld. Looking at parental country of birth, the three most common ancestries among residents in Diddillibah - Rosemount are English (33.8%), Australian (26.8%), and Scottish (9.1%). Minor demographic variances are also evident among other backgrounds, with German ancestry accounting for 5.1% locally compared to 4.7% regionally, New Zealand heritage comprising 1.0% (vs 0.9%), and South Australian background making up 0.6% (vs 0.5%).
Frequently Asked Questions - Diversity
The median resident of Diddillibah - Rosemount is 45, older than 81% of areas nationally. That is 1 year younger than at the 2021 Census. 20.9% of residents are aged 15 to 34. Age cohorts are not raw Census counts: the Census split is re-based to the latest ABS population estimates and state projections.
Detail
The age distribution of Diddillibah - Rosemount aligns broadly with Regional Qld, exhibiting a maximum difference across cohorts of 5.9 percentage points. The median age is estimated at 45 as at August 2026, falling from 46 at the 2021 Census, which compares to 41 for Regional Qld and 38 nationally at that Census. Since that time, the proportion of residents aged 45 - 64 has declined from 29.3% to an estimated 26.3%. Through to 2041, retirees and older residents (65+) will drive most demographic expansion, increasing by 279 residents (24%) to 1,426, whereas younger age groups and children are projected to contract.
Frequently Asked Questions - Age
Data & MethodBoundaries, Sources & Method for Diddillibah - Rosemount
9 of 14 data sections on this page were updated within the last 12 months — the newest current to Oct 2026.
Everything is aggregated to the SA2 boundary shown above, on a 2021 Census baseline. Only 3 sections — housing, households and cultural diversity — still wait on the 2026 Census.
The ledger — source, cycle and currency by section
| Section | Source & update cycle | Currency |
|---|---|---|
| Updated within the last 12 months 9 sections | ||
| Population | ABS, GNAF, Geoscience Australia Annual (ABS ERP) | Aug 2026 2 months ago headline measures · 2021 Census baseline |
| Re-based to the ABS Estimated Resident Population (June 2025 release) and updated with new dwellings from GNAF address data. Current to Aug 2026, with the 2021 Census supplying the small-area baseline. | ||
| Age profile | ABS, Geoscience Australia, State governments Annual | Aug 2026 2 months ago headline measures · 2021 Census baseline |
| Age cohorts are re-based to the latest ABS population estimates and state projections, current to Aug 2026. Each cohort is held as a Census baseline and a current estimate. | ||
| Development & approvals | ABS, GNAF Monthly (ABS approvals) | Aug 2026 2 months ago headline measures · Jul 2026 baseline |
| Property sales & rents | Valuer General, Rental Board, ABS Weekly sales, quarterly rents | Oct 2026 this month headline measures · Sep 2026 baseline |
| Sales from the state Valuer General register, refreshed weekly, and rents from quarterly rental bond lodgements. Both are read live each time this page loads, current to Oct 2026. | ||
| Infrastructure projects | Infrastructure Australia, State agencies, Local governments Daily | Aug 2026 2 months ago all 4 projects tracked here |
| Project pipeline maintained continuously from Infrastructure Australia, state agencies, local government and public announcements. Records are added and revised daily; this area was last updated Aug 2026. | ||
| Employment | ABS, DEWR, JSA Quarterly (ABS SALM) | Mar 2026 7 months ago headline measures · 2021 Census baseline |
| Unemployment and labour force from ABS Small Area Labour Markets, current to Mar 2026. The growth outlook applies Department of Employment (now Jobs and Skills Australia) forecasts for all 19 industry divisions to the local industry mix, so it measures sector composition rather than local expansion and makes no allowance for population growth. Job demand comes from the same agency via its Internet Vacancy Index; industry and occupation structure from the 2021 Census. | ||
| Education | ABS, ACARA Annual (ACARA) | Sep 2026 last month headline measures · 2021 Census baseline |
| Transport | ABS, State Transport Departments Each timetable release | Jul 2026 3 months ago headline measures · 2021 Census baseline |
| Services & amenities | Provider directories, ACECQA Continuous | Sep 2026 last month all 14 measures |
| Annual and financial-year sources 2 sections | ||
| Income | ABS, ATO Annual (ATO) | FY 2023 3 years ago headline measures · 2021 Census baseline |
| ATO taxable income statistics for FY 2023, indexed forward using the Wage Price Index. Census household income provides the distribution detail. | ||
| Health | ABS, ATO Annual | 2024 2 years ago headline measures · 2021 Census baseline |
| Census-measured — next update: 2026 Census 3 sections No more current small-area source exists for these, so they are labelled as Census-measured rather than implied to be current. | ||
| Housing | ABS 5-yearly (Census) | 2021 Census next update 2026 all 30 measures |
| Households | ABS 5-yearly (Census) | 2021 Census next update 2026 all 18 measures |
| Cultural diversity | ABS, Geoscience Australia 5-yearly (Census) | 2021 Census next update 2026 all 44 measures |
"Currency" is the most recent release feeding that section. Where the Census supplies the structural baseline underneath a current headline figure, the row says so.
How the numbers are built
Population
The Census provides the small-area baseline, aggregated from mesh blocks to this boundary. It is then re-based to the ABS Estimated Resident Population (June 2025 release), and new dwellings built since Census night are counted from address data — 39 validated new addresses here. The headline figure is therefore a current estimate for Aug 2026, not a 2021 count (4,403 at the 2021 Census → 4,733 now). Annual growth rates are compound (CAGR), not simple averages.
Age profile
Cohort shares are not raw Census counts. Every cohort is held as a pair — the Census baseline and a current estimate — and the split is re-based using ERP and state population projections, current to Aug 2026. Median age is the Census median plus modelled change since. Charts that show both are labelled "2021 Census vs Current Estimate".
Property sales
Sourced from the state valuation authority's sales register — current, not Census, and refreshed weekly. Medians are calculated from settled transactions in the period shown; periods with very low transaction counts are flagged or suppressed, because a handful of sales can move a median substantially.
Rents
Derived from state rental bond lodgement data, by dwelling type and bedroom count. Bonds are lodged at the start of a new tenancy, so this reflects new lettings, not the whole rented stock.
Development & infrastructure
Building approvals come from current ABS releases; development applications are collected from council and state planning portals; the infrastructure pipeline is compiled from Infrastructure Australia and local government sources. Applications are matched to this boundary by address or coordinates, so very recent lodgements may not yet appear.
Employment & income
Industry and occupation structure comes from the Census, but the headline labour-market indicators do not. Unemployment and labour force are derived from ABS Small Area Labour Markets (quarterly). The employment outlook applies Department of Employment forecasts for all 19 industry divisions to this area's own industry mix (the agency is now Jobs and Skills Australia), as does the Internet Vacancy Index used for job demand. Because it is weighted on industry composition alone, that outlook carries no allowance for local population growth — in fast-growing areas the real rise in local jobs will typically be higher. Income combines Census household income with ATO taxable-income statistics for FY 2023, indexed forward using the Wage Price Index.
Education, transport & amenities
School enrolments, ICSEA and performance come from ACARA's current release, not the Census. Public transport stops and service frequency are derived from GTFS timetable feeds published by state transport departments. Services and amenities are proximity and count scores built from provider directories, refreshed on their own cycle. The Census contributes only the travel-to-work and qualification measures.
Rankings and benchmarks. Where we rank this area, the comparison set is every area of the same boundary type — suburbs against suburbs, SA2s against SA2s. Benchmarks compare this area against its greater capital city region and the national figure for the same measure and period.
Limits worth knowing. Small areas carry larger error margins, and the ABS introduces small random adjustments to Census counts to protect confidentiality — so totals may not sum exactly. Estimates re-based from regional data describe the area's expected trajectory, not a direct count of it. Figures are indicative for research and are not financial, planning or valuation advice.
Cross-check us. The Census baseline for this boundary is at ABS 2021 Census QuickStats (316071546). QuickStats reports 2021 only — the figures on this page are more current wherever the ledger shows a later date.