Garden Island is in Unincorporated SA LGA, SA, postcode 5015, with population 4.
The page is still useful for local context, but the evidence stack is too thin for a clean one-page call. Use nearby stronger suburbs or compare mode before treating it as a serious shortlist decision.
The page is thin enough that nearby alternatives should be checked before shortlisting. Small local population makes the signal set more fragile.
Price series isn't recorded for this suburb. Census housing data is shown instead.
ABS population projection (2022 base) for the Torrens Island SA2 statistical area — the finest official projection grain available; suburb-level projections do not exist.
Garden Island is a small, quiet locality in South Australia within the Unincorporated SA local government area (postcode 5015). With a population of 4, the suburb has a more retirement-aged population with a median age of 64. Households earn a median income of $39K per year, with an average household size of 1.3 people. Recent annual estimates show population movement softening across the broader catchment, with population growth running at -1.0% year-on-year at the LGA level. SA employment has moved +2.1% year-on-year in the official ABS Labour Force trend series, which provides the broader jobs backdrop for this suburb. SA also had 21 Commonwealth-backed major projects under construction, 7 underway, and 7 in planning as at 2025-09-01, which is useful as a broader delivery backdrop rather than a suburb-specific project count. The top ancestries reported are English, German.
The crime rate in the Unincorporated SA LGA is higher than average at 50,000 incidents per 100,000 population.
From an investment perspective, Population growth of -1.0% year-on-year points to declining demand fundamentals. Building approvals have changed +0% year-on-year, indicating steady development activity.
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Garden Island is a thin local read rather than a complete suburb verdict.
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
Treat the rent field as missing until a market or plausible Census rent value is linked.
Schools, transport, and hospitals are useful as presence signals, but they still have different source cadences.
This page stays indexable because Garden Island is a real locality with enough context to be directionally useful. The tradeoff is that coverage is lighter than a stronger suburb profile, so the read should stay cautious.
Small-population localities can still be worth checking, but rankings, comparisons, and broad suburb assumptions become noisier faster.
The lighter areas here are school matches, hospital coverage, and transport stops, so a single-page read should carry less weight than usual.
Check nearby suburbs, the state hub, and rankings for firmer comparables before making this a shortlist decision.
This page remains visible, but it should be read as a locality brief rather than a full-confidence suburb profile.
This page is useful for direction-setting, not closure. Use it to frame the locality, then confirm the story with compare, stronger nearby suburbs, and the state hub.
If Garden Island feels too thin on its own, use these nearby suburbs as stronger local reads before making a shortlist decision.
pop same
Similar local read: useful for context, but still compare the actual market signals.
pop same
Similar local read: useful for context, but still compare the actual market signals.
Garden Island is in the Unincorporated SA Local Government Area, SA, postcode 5015. Council-level context for Unincorporated SA LGA (suburb mix, population, rent, and price coverage) is available on the QuickProperty LGA page.
QuickProperty's investment signals for Garden Island show: Declining, Steady. 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.