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Dinner Plain vs Portarlington

Property investment comparison - Dinner Plain, VIC 3898 vs Portarlington, VIC 3223

Head-to-head across core investment metrics: Dinner Plain wins 1, Portarlington wins 2. 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.

MetricDinner PlainPortarlington
Median house price$830K$825K
Median unit price-$630K
Gross rental yield (houses)2.82%3.50%
Gross rental yield (units)-3.80%
1-year house growth-+3.6%estimate
3-year house growth--
Vacancy rate1.5%2.1%
Population1284,436

Dinner Plain vs Portarlington: what the numbers say

The median house price is $830K in Dinner Plain and $825K in Portarlington, so Portarlington is the cheaper entry point, with Dinner Plain houses about 1% dearer.

On cash flow, Portarlington leads: houses there return a gross rental yield of 3.50%, compared with 2.82% in Dinner Plain, a gap of 0.68 percentage points.

Rental vacancy is 1.5% in Dinner Plain and 2.1% in Portarlington, so landlords in Dinner Plain face less competition for tenants. Anything under 2% is generally read as a tight market where tenants compete for homes.

Portarlington is the bigger suburb, with a population of 4,436 against 128, roughly 35 times the size of Dinner Plain; a larger suburb usually means a deeper pool of buyers and tenants.

In short: Portarlington for rental income, Portarlington for a lower purchase price, Dinner Plain for the tighter rental market. Which matters more depends on whether the investor is buying for cash flow, capital growth or affordability.

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Dinner Plain vs Portarlington: Suburb Comparison 2026