O'Sullivan Beach is in Onkaparinga LGA, SA, postcode 5166, with population 1,844.
There are enough stretched or weaker signals here that you should assume trade-offs rather than a clean story. Use compare mode to see whether the downside is price, local quality, or weaker momentum before treating it as a target suburb.
Transport coverage adds a practical access signal.
Indicative cashflow is interest-only and excludes tax — use the calculator for a full projection.
Owners with a mortgage repay a median of $1,200/mo, while renters pay about $2,219/mo — renting runs $1,019/mo higher on these medians.
O'Sullivan Beach is a small community in South Australia within the Onkaparinga local government area (postcode 5166). The area has roughly 1,844 residents and a settled mid-life population, with a median age of 44. Households earn a median income of $56K per year, with an average household size of 2.2 people. Recent annual estimates show population movement staying broadly stable across the broader catchment, with population growth running at +0.9% year-on-year at the LGA level. SA employment has moved +2.1% year-on-year in the official Jobs and Skills Australia NERO series, which provides the broader jobs backdrop for this suburb. SA also had 23 Commonwealth-backed major projects under construction, 2 underway, and 11 in planning as at 2 October 2024, which is useful as a broader delivery backdrop rather than a suburb-specific project count. The most common occupations are technicians & trades, community & personal service, labourers. Employment in the area leans toward healthcare and construction. The top ancestries reported are English, Australian, Scottish.
The median house price in O'Sullivan Beach is $780,000, having dipped slightly by 1% over the past year. The current median weekly rent is $512. This gives a gross rental yield of approximately 3.4%. The median monthly mortgage repayment is $1,200.
O'Sullivan Beach is served by 2 schools, including 1 primary, 1 combined. The average ICSEA score is 1010, which is around the national average of 1,000. Public transport access includes 16 bus stops. The crime rate in the Onkaparinga LGA is moderate at 5,965 incidents per 100,000 population.
Looking at the investment signals, O'Sullivan Beach shows a gross rental yield of approximately 3.4%, rated as moderate yield. Property prices are near the state median ($780K/$950K). The price-to-income ratio of 14.0x is considered stretched. House prices have moved -1.0% year-on-year. Population growth of +0.9% year-on-year points to stable demand fundamentals. Building approvals have changed +0% year-on-year, indicating steady development activity.
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There is enough direct local evidence on O'Sullivan Beach for a first-pass decision.
QuickProperty mixes release files, Census baselines, and matched local services on this page. Read the status panel before treating every metric as equally fresh.
Official quarterly house sales workbooks; units remain on ABS fallback coverage
Use current rent as a starting signal, not as a fixed underwriting truth.
Schools, transport, and hospitals are useful as presence signals, but they still have different source cadences.
O'Sullivan Beach is in the Onkaparinga Local Government Area, SA, postcode 5166. Council-level context for Onkaparinga LGA (suburb mix, population, rent, and price coverage) is available on the QuickProperty LGA page.
The current median house price in O'Sullivan Beach, SA is $780K, based on the latest available sales data from state Valuers General offices and ABS Data by Region.
The median weekly rent in O'Sullivan Beach is $512/wk, based on the current market rent dataset. The current rent signal is rent context available.
Rent context available: O'Sullivan Beach has usable rent context. Use this as a suburb screening signal before comparing candidates or modelling a purchase; the matching rent ranking can provide broader market context.
QuickProperty's investment signals for O'Sullivan Beach show: Moderate Yield, Near Median, Stretched. These are computed from price, rent, income, and population data — not an opaque score.
Property prices come from state Valuers General offices and ABS Data by Region. Demographics are from ABS Census 2021. School ICSEA scores are from ACARA. Crime statistics are from state police agencies. Transport data is sourced from GTFS feeds.
Property prices update quarterly. RBA macro indicators update with each deploy. Demographics are from Census 2021. School ICSEA scores are from ACARA 2025.