Allenby Gardens vs O'Sullivan Beach
Property investment comparison - Allenby Gardens, SA 5009 vs O'Sullivan Beach, SA 5166
Head-to-head across core investment metrics: Allenby Gardens wins 1, O'Sullivan Beach wins 3. The better choice depends on whether you're optimising for cash flow, growth, affordability, or liquidity, the table below highlights the winner on each metric.
| Metric | Allenby Gardens | O'Sullivan Beach |
|---|---|---|
| Median house price | $1.2M | - |
| Median unit price | $920K | - |
| Gross rental yield (houses) | 3.28% | 3.75% |
| Gross rental yield (units) | - | 3.27% |
| 1-year house growth | +8.0% | +12.0% |
| 3-year house growth | +33.1% | +41.9% |
| Vacancy rate | 0.3% | 1.4% |
| Population | 2,045 | 1,844 |
Allenby Gardens vs O'Sullivan Beach: what the numbers say
On cash flow, O'Sullivan Beach leads: houses there return a gross rental yield of 3.75%, compared with 3.28% in Allenby Gardens, a gap of 0.47 percentage points.
Over the past year house prices moved +8.0% in Allenby Gardens and +12.0% in O'Sullivan Beach, so recent momentum favours O'Sullivan Beach, although both suburbs recorded growth.
Looking back three years, Allenby Gardens houses are +33.1% and O'Sullivan Beach houses +41.9%, so O'Sullivan Beach has compounded faster than Allenby Gardens over the longer window.
Rental vacancy is 0.3% in Allenby Gardens and 1.4% in O'Sullivan Beach, so landlords in Allenby Gardens face less competition for tenants. Anything under 2% is generally read as a tight market where tenants compete for homes.
Allenby Gardens is the bigger suburb, with a population of 2,045 against 1,844, larger than O'Sullivan Beach; a larger suburb usually means a deeper pool of buyers and tenants.
In short: O'Sullivan Beach for rental income, O'Sullivan Beach for recent price momentum, Allenby Gardens for the tighter rental market. Which matters more depends on whether the investor is buying for cash flow, capital growth or affordability.
Full profile
Allenby Gardens, SA 5009
Open Allenby Gardens suburb profileRecent sales in Allenby Gardens
Full profile
O'Sullivan Beach, SA 5166
Open O'Sullivan Beach suburb profileRecent sales in O'Sullivan Beach
Keep exploring
- National investment guide - top suburbs across every metric
- Take the suburb finder quiz - 5 questions to match your goals
- How our investment score works
- Property investment glossary - every term defined
Compare any 2-4 Australian suburbs
Build your own multi-suburb comparison with the full interactive tool.
Open interactive comparison