Finding Out What Your Home Is Worth

Most homeowners expect a single number. What they get from a property appraisal is a range, a set of assumptions, and an answer that can shift depending on who is doing the calculating.

Pricing a property sounds straightforward until you examine what it actually involves. Behind that question sits a process that involves data, judgement, and interpretation in roughly equal measure. The sellers who price well and negotiate effectively are usually the ones who understand what the appraisal process actually involves before they start.

Why Three Agents Give Three Different Numbers

There is no central register that holds the correct value of a property. What it represents is a judgement call informed by evidence - the most relevant recent sales, adjusted for the property in question, filtered through current buyer demand.

Comparable sales analysis is the standard framework most agents use to estimate property value. Recent sales with comparable bedrooms, land size, construction, and condition are identified, and the subject property is then adjusted up or down against each one based on how it compares.

Many buyers and sellers assume a property has one correct value that a skilled professional will identify. In reality, two experienced agents working from the same comparable sales data can arrive at different conclusions because the adjustment process involves judgement, not just arithmetic.

How much comparable sales data is available in a given area shapes how confident any estimate can reasonably be. High-turnover suburbs with consistent stock give agents more to work with and tend to produce tighter agreement between appraisals. In suburbs where fewer properties sell each year and stock varies significantly in age, size, and condition, the same data set can produce a wider spread of conclusions.

What Separates an Appraisal From a Formal Property Valuation

Many sellers enter the market believing that the appraisal an agent provides and the valuation a bank orders are two versions of the same exercise. They are not.

A real estate appraisal is an agent opinion of market value. It is based on comparable sales and market knowledge and is used to inform a listing price. 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. One opens a conversation about where to list. The other closes a conversation about what a property is worth in a legally meaningful context.

To get a better understanding of what a property appraisal involves and what it tells you, useful information to understand what a property appraisal will and will not tell you.

A formal valuation is not always necessary for a seller - an appraisal is usually sufficient for listing purposes. Knowing what an appraisal is and is not puts a seller in a better position to evaluate what they are being told and ask the right questions about how the figure was reached. An agent who can clearly explain how they arrived at their number is usually worth more attention than one who simply presents a figure and moves on.

What Online Estimates Get Wrong

Getting an instant property estimate has never been easier - which has also made it easier to work from a number that does not reflect reality. The convenience of an instant estimate comes with a significant limitation - the number produced often has little relationship to what the property would achieve in the current market.

The methodology behind automated estimates involves matching the subject property to comparable sales in the dataset and producing a figure based on statistical relationships between property characteristics and sale prices. No algorithm can assess whether the kitchen was recently renovated, whether the street presentation is immaculate, or whether the rear aspect makes the property significantly more desirable than comparable sales suggest.

A property that has been recently renovated, meticulously maintained, and sits on a quiet street with a north-facing rear garden may carry the same automated estimate as an identical floorplan two streets away that has not been touched in fifteen years. The market will treat those two properties very differently. The algorithm will not.

As a broad reference point for what a suburb is doing price-wise, online tools have some value. As a basis for setting a list price, evaluating a sale outcome, or making a financial decision, they are an unreliable tool.

The Interpretation Problem at the Centre of Every Appraisal

Getting appraisals from three agents and receiving three different numbers is a common experience that leaves many sellers unsure what to do with the information.

The numbers differ. The property has not changed. Someone has to be mistaken.

In most cases, none of them are wrong. Each agent is drawing on the same recent sales but weighting them differently, adjusting for features differently, and applying their own read of current buyer sentiment.

One agent may weight a sale from four months ago more heavily because it involves a property they consider highly comparable. Another may consider that same sale stale and prioritise more recent evidence even if it is less directly comparable. The third agent applies an upward adjustment for a feature the other two did not treat as premium - a larger land component or an additional car space.

The gap between three appraisals is not a quality problem. It is an inherent feature of a process that requires interpretation. It is evidence that pricing property involves interpretation, not just calculation. 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.

It is a question most sellers never put to the agents they are evaluating. 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, find out here for more context on how the market is moving.

How to Know What Your Property Is Worth - Common Questions

How do I find out what my house is worth

Getting an appraisal from an agent with recent sales in your suburb gives you the most current and directly relevant picture of what buyers are paying. An agent working recent sales in your area will have direct knowledge of what buyers are paying, how long properties are taking to sell, and what features are driving price differences between comparable homes. Online estimates provide a general range but should not be relied on for pricing decisions.

Why do online property estimates differ from agent appraisals

Online property estimates vary significantly in accuracy depending on the suburb, the volume of recent sales activity, and how recently the underlying data was updated. In suburbs with high turnover and consistent property types, automated estimates can be reasonably close to market value. In suburbs with lower volume, older stock, or significant variation between properties, the margin of error can be substantial. They are best used as a broad orientation tool rather than a pricing reference.

Is it worth getting a property appraisal before selling

An appraisal is worth seeking even before a firm decision to sell has been made. Understanding what the property is likely to achieve gives a seller the information they need to make the timing decision with confidence rather than assumption. Getting an appraisal carries no obligation to proceed with the agent involved. 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.