Property guide: what shapes a property's value

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What a property guide sets out

Cotality's guide to what a property is worth draws on national data and local insights to explain how a home's value is determined and how the figure can be read. The guide says most homeowners ask at some point how much their property is worth, often at refinancing, when equity is released, when a renovation is planned, or after a nearby sale.

The guide separates the market forces an owner cannot control from the features of the property itself. Value shifts over time with the economy, local demand and the details that set a home apart.

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Market forces that shape value

Cotality describes location and demand as a long-term driver of value, and says homes close to schools, transport and employment hubs often carry a premium. Quieter streets near shops and transport can often be stronger performers over time, according to the guide. Its research on school catchment pricing found six-figure premiums being paid for homes inside the zones of top public schools.

Interest rates affect what buyers can borrow, the guide says, and it notes borrowing costs eased after the Reserve Bank of Australia began cutting the cash rate in late 2024. Cotality counts three cuts to the official cash rate in 2025. Its August analysis adds that affordability remains stretched and is likely to hold demand back even as rates come down, and its Pain and Gain report found over 90 per cent of homes resold in mid-2025 made a profit.

When fewer homes are listed, competition among buyers typically strengthens, says Cotality, which reports national stock levels through 2025 staying below the five-year average. Its spring listings analysis found values gaining pace heading into spring, helped by record-low numbers of homes on the market.

Transport projects, new hospitals and redevelopments of precincts bring jobs and better connections, often lifting values nearby, according to the guide. Its capital city comparison report found metro markets had pulled ahead of regional areas after a lag of nine months, reflecting population and investment flows into the cities.

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What the home itself adds

Well-maintained homes with modern kitchens and bathrooms and neutral interiors tend to draw stronger offers than those needing major work, the guide says. The guide says buyers often pay more for a home that needs no work before they move in. The gap between houses and units has widened: Cotality puts the national median house value at around 32 per cent above the median unit, as of August 2025.

The guide describes units as an affordable way in for first-home buyers and investors. Renovations can lift value when they add genuine function or appeal, and Cotality says spending on kitchens, bathrooms and outdoor spaces typically gives the best returns, because those areas shape daily use and carry an emotional pull. The guide also notes that construction cost growth is the lowest it has been in ten years.

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Three ways to reach a figure

Cotality sets out three ways to estimate what a property is worth, each suiting a different purpose. An automated valuation model gives an instant estimate, comparing sales of similar homes through an algorithm to produce a statistical range. It draws on millions of records, matching land size, bedroom numbers and location against recent sales. It cannot account for a new kitchen, a view or an unusual design, the guide says, and it works from publicly available data.

A real estate agent's appraisal adds local context. An agent inspects the property, studies nearby sales and sets an estimated selling figure, backed by evidence of comparable sales and a marketing plan, according to the guide. Appraisals are opinions, and the guide recommends homeowners request more than one appraisal and compare the results.

A professional valuation is an independent assessment, the guide says, and formal valuations are needed by lenders, courts and government agencies for matters such as refinancing, family law, taxation and estates. A certified valuer goes through the property, notes its condition and measurements, weighs comparable sales and market trends, and writes a detailed report. The guide notes that a fee applies and that the figure reflects the position on the day it was inspected.