Finding Out What Your Home Is Worth

Homeowners seeking a property appraisal generally expect to walk away with 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.

The question of what a house is worth sounds simple. The process behind answering it is not. 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 an estimate based on comparable sales, adjusted for the specific characteristics of the property being assessed, and interpreted through the lens of current market conditions.

The starting point for any agent appraisal is a set of comparable sales - properties that have sold recently with characteristics similar to the subject property. The agent selects recent sales that most closely resemble the property being appraised and adjusts the estimated value based on the differences - a larger block, a newer kitchen, a busy road frontage.

The expectation that a skilled agent will identify the one true value of a property is understandable but inaccurate. Which sales are most comparable, how much weight each one carries, and how to adjust for specific property features are all judgement calls, and reasonable practitioners make them differently.

The volume of recent sales in an area also affects how reliable any estimate can be. Where a suburb has high transaction volume and relatively uniform housing stock, the pool of comparable sales is deep and agent estimates tend to cluster more closely together. When the data is thin and properties differ substantially from one another, the interpretation gap between agents widens.

Why a Free Appraisal and a Bank Valuation Are Not the Same Thing

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. No legal standing attaches to an agent appraisal, and the agent providing it has a commercial interest in the relationship that follows.

The formal valuation process is regulated, conducted by a licensed practitioner, and produces a document that carries legal and financial weight in a way an agent appraisal does not. It costs money, takes longer, and produces a document rather than a conversation.

Knowing what type of information you are working with changes how you use it - and an appraisal and a valuation are not interchangeable tools. One opens a conversation about where to list. The other closes a conversation about what a property is worth in a legally meaningful context.

If you want to understand more about how agents arrive at a property value estimate, useful information to get a clearer picture of what the process involves.

Sellers preparing to list do not always need a formal valuation. 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.

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.

Automated valuation models work by pulling recent sales data and applying statistical algorithms to estimate value based on property characteristics recorded in public databases. What they cannot access is interior condition, recent renovation work, presentation quality, or the specific features that make one property more or less appealing than another with identical specifications on paper.

An automated tool treating two identical-specification properties as equivalents is producing an estimate that the market would immediately disagree with. The market will treat those two properties very differently. The algorithm will not.

Online estimates are useful for orientation - understanding the approximate price range a suburb is operating in. As a basis for setting a list price, evaluating a sale outcome, or making a financial decision, they are an unreliable tool.

Why the Same Data Produces Different Numbers

Sellers who seek multiple appraisals sometimes walk away more confused than when they started.

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. The question worth asking is not who gave the highest number but who can most clearly explain why they chose the comparables they did and how they arrived at their adjustments.

It is a question most sellers never put to the agents they are evaluating. The sellers who ask how tend to make better pricing decisions than the ones who simply accept what they are told.

For further reading on how the property market works and what recent results mean for sellers and buyers, full details to see what the data is showing.

Frequently Asked Questions About Property Value

How can I get an accurate property valuation

An agent who is currently selling in your area is the best starting point for understanding what your property is likely to achieve. That direct market knowledge - who is buying, what they are paying, and why - is what separates a current local appraisal from any other source of property value information. Online estimates provide a general range but should not be relied on for pricing decisions.

Can I trust online house price estimates

How close an automated estimate is to actual market value depends on the depth and recency of the sales data it is drawing from. High-turnover suburbs with predictable property types are where automated estimates are most likely to approximate reality. 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. Having a current appraisal in hand means the decision about when to sell can be made on the basis of real market information rather than assumptions about what the property might achieve. Most agents will provide an appraisal without obligation. The most informed approach is to get more than one appraisal and spend time understanding the comparable sales and reasoning each agent used to arrive at their number.


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.