Hindmarsh Island vs Pennington

The median house price is $855K in Hindmarsh Island and $875K in Pennington, so Hindmarsh Island is the cheaper entry point, with Pennington houses about 2% dearer.

Gross rental yield on houses is effectively level, at 3.50% in Hindmarsh Island and 3.52% in Pennington, so neither suburb has a cash flow edge on houses.

Over the past year house prices moved +5.8% in Hindmarsh Island (an estimate) and +14.3% in Pennington (an estimate), so recent momentum favours Pennington, although both suburbs recorded growth.

Rental vacancy is 0.4% in Pennington and 0.9% in Hindmarsh Island, so landlords in Pennington face less competition for tenants. Anything under 2% is generally read as a tight market where tenants compete for homes.

Pennington is the bigger suburb, with a population of 3,773 against 1,846, roughly 2.0 times the size of Hindmarsh Island; a larger suburb usually means a deeper pool of buyers and tenants.

In short: Hindmarsh Island for a lower purchase price, Pennington for recent price momentum, Pennington for the tighter rental market. Which matters more depends on whether the investor is buying for cash flow, capital growth or affordability.