Finding Out What Your Home Is Worth

Most homeowners expect a single number. What an appraisal actually delivers is a range built on comparable sales, adjusted for conditions, and shaped by the experience of whoever is doing the assessment.

Most people treat the question of property value as though it has a clean, retrievable answer. What produces that answer is more complex than the question itself suggests. Knowing what sits behind a property valuation changes how a seller reads the number they are given and how they respond when buyers push back on it.

How Property Value Is Determined

Property value is not a fixed figure sitting in a database somewhere waiting to be retrieved. It is built from comparable sales data, adjusted for what makes the subject property different from those sales, and shaped by the market conditions at the time of assessment.

Comparable sales analysis is the standard framework most agents use to estimate property value. The process involves selecting the most relevant recent sales, comparing them to the subject property feature by feature, and arriving at an adjusted estimate based on those differences.

The common assumption is that somewhere in the comparable sales data there is a right answer and a good agent will find it. Two agents with equal experience and access to the same data can produce different estimates because every adjustment they make involves a degree of professional judgement.

The reliability of a property estimate is partly a function of how much recent sales activity there is to draw from. In suburbs with strong turnover and consistent property types, comparable sales data is plentiful and estimates tend to be more consistent between agents. Suburbs with low turnover or significant variation in property type give agents less to work with, and the estimates that emerge tend to reflect that uncertainty.

Appraisal vs Valuation - What Sellers Need to Know

Treating a free agent appraisal and a formal property valuation as interchangeable is one of the more consequential misunderstandings sellers bring to the selling process. They are not.

The appraisal an agent delivers is their interpretation of what the market is likely to pay, based on comparable sales and their own market experience. It is produced to assist with the listing decision and is not subject to independent verification or professional oversight. It is provided free of charge, is not independently verified, and the agent who delivers it stands to benefit commercially from the outcome.

Where an appraisal is an opinion, a formal valuation is a regulated professional assessment with liability attached and legal standing in lending and legal contexts. Unlike an appraisal, it involves a fee, follows a structured process, and results in a formal written report.

The distinction matters because sellers who treat an appraisal as a formal valuation are working with a different type of information than they think they have. An appraisal sets the stage for a listing decision. A valuation provides a conclusion that banks, courts, and insurers will accept.

To get a better understanding of what a property appraisal involves and what it tells you, find out here to get a clearer picture of how the appraisal process works before you book one.

A formal valuation is not always necessary for a seller - an appraisal is usually sufficient for listing purposes. The value of understanding the distinction is that it changes how a seller engages with the appraisal - and the questions they ask when the number does not match their expectations. The willingness to explain the reasoning behind an appraisal is one of the more reliable signals of an agent worth working with.

Why Automated Property Estimates Miss the Mark

Automated valuation tools have made it easier than ever for homeowners to get an instant estimate of what their property might be worth. They have also made it easier than ever for homeowners to work from a number that has little connection to what their property would actually sell for.

What sits behind the instant estimate is a statistical model built on public records - sold prices, land sizes, bedroom counts - filtered through an algorithm with no knowledge of the property itself. Interior condition, renovation quality, presentation, and the subjective appeal of specific features are entirely invisible to an automated model.

Two properties with identical specifications on paper - same bedrooms, same land size, same suburb - can produce the same automated estimate while sitting at opposite ends of what buyers would actually pay for them. The market will treat those two properties very differently. The algorithm will not.

For understanding the general price range a suburb operates in, automated estimates provide a starting point. The gap between an automated estimate and what an active local agent would produce can be significant - and the consequences of pricing from the wrong number are felt at settlement.

Why the Same Data Produces Different Numbers

When a seller approaches three agents for appraisals and receives three meaningfully different numbers, the natural assumption is that at least two of them must be wrong.

Three different appraisals of the same property produce the same question in almost every seller: which one is right.

The more accurate reading is usually that all three agents are working from legitimate interpretations of the same data. Comparable sales analysis involves a series of judgement calls - which sales are most relevant, how recent is recent enough, how much to adjust for a larger block or a busier road - and those calls produce different outcomes in the hands of different practitioners.

Agent A sees a sale from earlier in the year as the most reliable comparable and builds the estimate around it. A second agent dismisses that same sale as too old given a recent change in market conditions and gives more weight to a lower result from the past six weeks. A third may adjust upward for a feature - a double garage, a larger allotment - that the other two treated as standard.

Variation between appraisals is normal and expected - it reflects the interpretive nature of the process, not the skill level of the agents involved. Pricing is not a formula. The variation between appraisals is the proof. Rather than asking which estimate is correct, the more productive question is which agent can walk you through their methodology clearly and defend the assumptions behind their number.

That question goes unasked in most appraisal conversations. Those who ask it tend to enter the market with a more grounded price expectation and a clearer basis for the decisions that follow.

To get more context on recent property market results and what they mean for sellers, view this to get a clearer picture of current conditions.

What Homeowners Ask About Property Appraisals

How can I get an accurate property valuation

The most reliable starting point is a current market appraisal from an agent who is actively selling property in your suburb. Recent local sales experience gives an agent insight into buyer behaviour, current demand levels, and the specific features that are generating price premiums or discounts in that suburb. Online estimates provide a general range but should not be relied on for pricing decisions.

Can I trust online house price estimates

Accuracy varies between suburbs and between tools - in some markets online estimates are reasonably close to reality, in others the margin of error is significant. Suburbs with frequent sales activity and consistent property types give automated models more to work with and tend to produce more reliable estimates. The margin of error widens considerably in suburbs with thin data, older stock, or significant property variation. They are best used as a broad orientation tool rather than a pricing reference.

When should I get a property appraisal before selling

The decision to get an appraisal does not need to wait until the decision to sell is confirmed. An appraisal converts the timing question from speculation into a decision informed by current market evidence. Most agents will provide an appraisal without obligation. Comparing estimates from two or three agents and asking each to explain their methodology gives a far more useful picture than relying on a single appraisal.


Online tools tell you what an algorithm thinks. An appraisal tells you what the market evidence shows. Only one of those is useful when you are making a decision.