Alderley vs South Isis

For units, Alderley sits at a median of $855K against $385K in South Isis, which makes South Isis the more affordable unit market and Alderley the pricier one.

On cash flow, Alderley leads: houses there return a gross rental yield of 2.46%, compared with 2.36% in South Isis, a gap of 0.10 percentage points.

Over the past year house prices moved +12.7% in Alderley and +15.7% in South Isis, so recent momentum favours South Isis, although both suburbs recorded growth.

Looking back three years, Alderley houses are +35.9% and South Isis houses +49.2%, so South Isis has compounded faster than Alderley over the longer window.

Rental vacancy is 1.7% in South Isis and 1.8% in Alderley, so landlords in South Isis face less competition for tenants. Anything under 2% is generally read as a tight market where tenants compete for homes.

Alderley is the bigger suburb, with a population of 6,748 against 381, roughly 18 times the size of South Isis; a larger suburb usually means a deeper pool of buyers and tenants.

In short: Alderley for rental income, South Isis for recent price momentum, South Isis for the tighter rental market. Which matters more depends on whether the investor is buying for cash flow, capital growth or affordability.