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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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Sales Activity
Curious about local property values? Filter the chart to assess the volume and appreciation (including resales) trends and regional comparisons, or scroll to the map below view this information at an individual property level.
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Sales Detail
Population
An assessment of population growth drivers in Marino - Seaview Downs reveals an overall ranking slightly below national averages considering recent, and medium term trends
Marino - Seaview Downs' population is approximately 10,237 as of May 2026. This figure shows an increase of 534 people since the 2021 Census, which recorded a population of 9,703. The growth can be inferred from the estimated resident population of 10,209 in June 2025 and 41 new addresses validated after the Census date. This results in a population density of 838 persons per square kilometer. Marino - Seaview Downs' 5.5% growth since the census is close to the SA4 region's 6.2%, indicating strong growth fundamentals. Overseas migration contributed around 70.1% of overall population gains recently.
AreaSearch uses ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered by this data and years post-2032, the SA State Government's Regional/LGA projections are adopted with adjustments made using weighted aggregation methods. Based on demographic trends, Marino - Seaview Downs is expected to grow by approximately 640 persons by 2041, reflecting a total gain of around 6.0% over the 16 years.
Frequently Asked Questions - Population
Development
Recent residential development output has been above average within Marino - Seaview Downs when compared nationally
Seaview Downs has seen approximately 37 new homes approved annually over the past five financial years, totalling 185 dwellings. As of FY26, 47 approvals have been recorded. On average, each dwelling adds around 2.1 new residents per year, indicating strong demand that supports property values. The average construction cost for these homes is $390,000, suggesting a focus on premium properties by developers.
In FY26, commercial development approvals amount to $17.2 million, reflecting balanced commercial growth. Compared to Greater Adelaide, Seaview Downs has roughly half the construction activity per person and ranks in the 60th percentile nationally for such activity. New developments consist of 84% standalone homes and 16% attached dwellings, maintaining the area's traditional low-density character that appeals to families seeking space.
With around 245 people per approval, Seaview Downs reflects a low-density population. AreaSearch's latest quarterly estimate projects an increase of 612 residents by 2041. Current construction levels should meet demand adequately, creating favourable conditions for buyers and potentially exceeding current population forecasts.
Frequently Asked Questions - Development
Development applications around Marino - Seaview Downs
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| Lodged | Address | Description | Type | Distance | Status |
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SOURCE: Planning portals and council registers, compiled by AreaSearch. Distance & bearing measured from the suburb midpoint.
Infrastructure
Marino - Seaview Downs has limited levels of nearby infrastructure activity, ranking in the 18thth percentile nationally
Eight projects identified by AreaSearch are expected to impact the area significantly, with key initiatives including Flagstaff Road Upgrade, Seaview Downs Primary School Redevelopment, residential development at 1 Greenfield Road, and Southern Suburbs Residential Policy Code Amendment. The following list details those likely to be most relevant.
Professional plan users can use the search below to filter and access additional projects.
INFRASTRUCTURE SEARCH
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Frequently Asked Questions - Infrastructure
Flinders Medical Centre Southern Redevelopment Stage 1 (Acute Services Building)
Stage 1 of the Southern Adelaide Local Health Network redevelopment, anchored by a new seven-storey Acute Services Building at the front of Flinders Medical Centre. The tower delivers 17,000 square metres of new built area plus 3,000 square metres of refurbishment, adding 98 clinical spaces. It will house two 32-bed adult inpatient units, an 18-bay Medical Day Unit, a 16-bed Intensive Care Unit with a dedicated CT scanner suite, four operating theatres with a 14-bay recovery area, a Day of Surgery Admissions area, a new Podiatry department, and a dedicated floor for the FMC Eye Surgery Clinic which integrates the network's ophthalmology services into a single facility (a first for South Australia's public health system). The new building will form the hospital's main entrance with a large lobby, retail outlet and undercover drop-off zone. The wider Stage 1 program also includes a 12-bed Psychiatric Intensive Care Unit at Margaret Tobin Centre (opening March 2026), 48 new beds at Noarlunga Hospital (opened November 2025), 32 beds across two wards at the Repat Health Precinct (opened 2024), and supporting upgrades to mortuary (completed October 2025), kitchen, sterilisation services and electrical infrastructure. More than 20 million dollars of new major medical equipment will be installed including advanced imaging, automated pharmacy dispensing cabinets and a new CT scanner. Designed by ARM Architecture with Silver Thomas Hanley, with Built Environs as Managing Contractor and Aurecon providing structural and civil engineering. The Acute Services Building is expected to open in early 2028.
Zero Cost Energy Future - Happy Valley Reservoir Solar Project
World's largest fully moveable solar array featuring 33,750 5B Maverick pre-fabricated solar panels with 12.8MW capacity at Happy Valley Reservoir Reserve. Generates 17 gigawatt hours of renewable energy annually to power the water treatment plant serving over 40% of Adelaide's drinking water. Part of SA Water's $300 million Zero Cost Energy Future initiative. The innovative relocatable system uses ballasted design requiring minimal ground penetration, allowing the array to be moved if needed for maintenance or site works.
Happy Valley Reservoir Reserve Access Project
First-time public opening of the 120-year-old Happy Valley Reservoir Reserve featuring 20 kilometres of walking, cycling and mountain biking trails, 110 hectares of water for kayaking and fishing, two kayak launch areas (one with disability access), picnic facilities with BBQs and shelters, car parking, and visitor amenities. The reserve connects to Glenthorne National Park creating over 1,500 hectares of accessible outdoor recreation space. Opened December 11, 2021 after extensive water treatment upgrades to enable safe public access while maintaining drinking water quality for over 40% of metropolitan Adelaide.
Adelaide Public Transport Capacity and Access
State-led program work to increase public transport capacity and access to, through and within central Adelaide. Current work is focused on the City Access Strategy (20-year movement plan for the CBD and North Adelaide) and the State Transport Strategy program, which together will shape options such as bus priority, interchange upgrades, tram and rail enhancements, and better first/last mile access.
Seaview High School Upgrade
Facility upgrade delivering a new 2 storey multi purpose Creative Design building, a new single storey Performing Arts facility with associated performance spaces, and refurbishment of an existing building to provide contemporary STEM learning areas. Project value reported at $17.65 million. Architect: Flightpath Architects. Builder: Badge Constructions. Construction completed, with completion reported by industry sources at end of 2022.
Flagstaff Road Upgrade
Road infrastructure improvements along Flagstaff Road including widening, new intersections, improved drainage, enhanced safety features, and upgraded pedestrian and cycling infrastructure to support growing residential development in the area.
OTR Seacombe Road Redevelopment
Upgrade of the existing OTR fuel and convenience site delivering a reconfigured car park, a convenience drive-through, 2.4m acoustic fencing, and new on-site amenities including dog wash and vacuum facilities. The store page indicates drive-through and dog wash services operating, consistent with works being completed.
Flagstaff Hill Sports Ground Upgrade
Comprehensive upgrade of sporting facilities including new clubrooms, improved playing surfaces, enhanced lighting, modern amenities, playground equipment, and accessibility improvements to serve the growing Flagstaff Hill community.
Employment
Employment conditions in Marino - Seaview Downs rank among the top 10% of areas assessed nationally
Marino - Seaview Downs has an educated workforce with significant representation in essential services sectors. Its unemployment rate was 2.2% as of December 2025. Employment growth over the past year was estimated at 4.8%.
As of December 2025, 5,719 residents were employed while the unemployment rate was 1.6% lower than Greater Adelaide's rate of 3.8%. Workforce participation was 69.2%, slightly higher than Greater Adelaide's 66.0%. Census responses indicated that a low 13.3% of residents worked from home, potentially influenced by Covid-19 lockdowns. Key industries of employment were health care & social assistance, construction, and education & training.
Construction was particularly specialized, with an employment share 1.4 times the regional level. Manufacturing employed only 5.3% of local workers, below Greater Adelaide's 7.0%. Employment opportunities locally may be limited based on Census data comparing working population to resident population. Over the year to December 2025, employment increased by 4.8%, labour force grew by 4.6%, and unemployment fell by 0.2 percentage points in Marino - Seaview Downs. In comparison, Greater Adelaide saw employment grow by 4.2%, labour force expand by 3.9%, and unemployment fall by 0.3 percentage points. National employment forecasts from Jobs and Skills Australia (May-25) project national employment growth of 6.6% over five years and 13.7% over ten years. Applying these projections to Marino - Seaview Downs' employment mix suggests potential local employment increases of 6.9% over five years and 14.2% over ten years, though these are simple extrapolations for illustrative purposes only.
Frequently Asked Questions - Employment
Income
Income levels align closely with national averages, indicating typical economic conditions for Australian communities according to AreaSearch analysis
AreaSearch's latest postcode level ATO data for financial year 2023 shows that Marino - Seaview Downs SA2 has an income above the national average. The median income is $55,275 and the average income stands at $70,223. This contrasts with Greater Adelaide's figures of a median income of $54,808 and an average income of $66,852. Based on Wage Price Index growth of 10.17% since financial year 2023, current estimates would be approximately $60,896 (median) and $77,365 (average) as of March 2026. Census 2021 income data shows that household, family, and personal incomes in Marino - Seaview Downs cluster around the 56th percentile nationally. Distribution data shows that the $1,500 - $2,999 bracket dominates with 33.2% of residents (3,398 people), aligning with the surrounding region where this cohort likewise represents 31.8%. After housing, 86.6% of income remains for other expenses and the area's SEIFA income ranking places it in the 7th decile.
Frequently Asked Questions - Income
Housing
Marino - Seaview Downs is characterized by a predominantly suburban housing profile, with above-average rates of outright home ownership
In Marino - Seaview Downs, as per the latest Census, 92.9% of dwellings were houses, with the remaining 7.1% being semi-detached, apartments, or 'other' dwellings. This compares to Adelaide metro's figures of 75.2% houses and 24.9% other dwellings. The home ownership rate in Marino - Seaview Downs was 40.4%, with mortgaged dwellings at 44.3% and rented ones at 15.3%. The median monthly mortgage repayment was $1,820, exceeding the Adelaide metro average of $1,562. The median weekly rent in Marino - Seaview Downs was $375, higher than Adelaide metro's $320 but comparable to the national average of $375. Nationally, mortgage repayments were slightly lower at $1,863.
Frequently Asked Questions - Housing
Household Composition
Marino - Seaview Downs has a typical household mix, with a higher-than-average median household size
Family households account for 75.3% of all households, consisting of 33.9% couples with children, 30.3% couples without children, and 10.3% single parent families. Non-family households make up the remaining 24.7%, with lone person households at 21.8% and group households comprising 2.9%. The median household size is 2.6 people, larger than the Greater Adelaide average of 2.5.
Frequently Asked Questions - Households
Local Schools & Education
The educational profile of Marino - Seaview Downs exceeds national averages, with above-average qualification levels and academic performance metrics
Marino - Seaview Downs has 30.4% of its residents aged 15 and above with university qualifications, exceeding the South Australian average of 25.7%. Bachelor degrees are the most common at 20.4%, followed by postgraduate qualifications (7.1%) and graduate diplomas (2.9%). Vocational credentials are also prevalent, with 35.7% of residents aged 15 and above holding such qualifications.
This includes advanced diplomas (11.7%) and certificates (24.0%). Educational participation is high, with 27.7% of residents currently enrolled in formal education. This includes primary education (9.6%), secondary education (7.2%), and tertiary education (5.7%).
Frequently Asked Questions - Education
Schools Detail
Nearby Services & Amenities
Transport
Transport servicing is good compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility
Marino - Seaview Downs has 45 active public transport stops offering a mix of train and bus services. These stops are served by 28 individual routes, collectively facilitating 2,787 weekly passenger trips. Transport accessibility is deemed good with residents typically residing within 250 meters of the nearest stop. Primarily residential, most residents commute outward using cars (88%), followed by train use at 7%. Average vehicle ownership stands at 1.6 per dwelling, exceeding regional averages. According to the 2021 Census, only 13.3% of residents work from home, potentially reflecting COVID-19 conditions.
Service frequency across all routes averages 398 trips daily, equating to approximately 61 weekly trips per individual stop.
Frequently Asked Questions - Transport
Transport Stops Detail
Health
Marino - Seaview Downs's residents boast exceedingly positive health performance metrics with younger cohorts in particular seeing very low prevalence of common health conditions
Marino - Seaview Downs shows excellent health outcomes based on AreaSearch's assessment of mortality rates and chronic condition prevalence, with younger cohorts having very low prevalence of common health conditions.
Approximately 54% (~5,517 people) have private health cover, leading the average SA2 area. The most prevalent medical conditions are arthritis (8.0%) and asthma (7.7%), while 69.7% report no medical ailments compared to 67.9% in Greater Adelaide. Health outcomes for those under 65 are better than average. The area has 21.3% of residents aged 65 and over (2,179 people), higher than the 19.2% in Greater Adelaide. While health outcomes among seniors are strong, they rank lower nationally compared to the broader population.
Frequently Asked Questions - Health
Cultural Diversity
The level of cultural diversity witnessed in Marino - Seaview Downs was found to be slightly above average when compared nationally for a number of language and cultural background related metrics
Marino-Seaview Downs was found to have above average cultural diversity, with 13.0% of its population speaking a language other than English at home and 25.6% born overseas. The predominant religion in Marino-Seaview Downs is Christianity, comprising 40.9% of the population. Notably, the category 'Other' comprises 1.3% of the population, slightly higher than the regional average of 1.8%.
The top three ancestry groups are English at 31.7%, Australian at 24.5%, and Irish at 7.2%. Significant differences include Polish (1.2% vs regional 1.0%), German (5.8% vs regional 5.1%), and Welsh (0.7% vs regional 0.6%).
Frequently Asked Questions - Diversity
Age
Marino - Seaview Downs's median age exceeds the national pattern
The median age in Marino - Seaview Downs is 43 years, which is significantly higher than Greater Adelaide's average of 39 years and Australia's average of 38 years. Compared to Greater Adelaide, Marino - Seaview Downs has a higher proportion of residents aged 45-54 (13.7%) but fewer residents aged 25-34 (9.6%). According to the 2021 Census, the population aged 15-24 grew from 11.0% to 12.8%, while the 75-84 age group increased from 7.1% to 8.4%. Conversely, the 65-74 age group declined from 11.8% to 10.2%. By 2041, demographic projections indicate that Marino - Seaview Downs' population aged 85 and above will grow by 105%, reaching 551 people from 269. Meanwhile, the populations aged 35-44 and 0-4 are expected to decrease.