How Much Is My House Worth - What to Do When Three Agents Give You Three Different Numbers

Most homeowners who invite three agents to appraise their property expect the numbers to be close. They are rarely close. A difference of $30,000 to $50,000 between the lowest and highest appraisal on the same property is common. A difference of $80,000 or more is not unusual. And all three agents, when pressed, can produce a rationale that sounds entirely reasonable.

This is the moment that confuses most vendors. If the comparable sales are publicly available data - the same sales every agent can access - why are the numbers so different? The answer is that appraisal is not calculation. It is interpretation. And interpretation varies.

Why Comparable Sales Produce Different Conclusions

Every residential property appraisal in Australia begins with comparable sales - recent transactions of similar properties in the same suburb or nearby area. The agent reviews those sales, identifies the ones most relevant to the subject property, and uses them to form a view of what the market would pay.

The problem is that no two properties are identical. A four bedroom house that sold three months ago on the next street is comparable - but it may have a larger block, a newer kitchen, a different aspect, or a better street position than the property being appraised. Each difference requires an adjustment, and adjustments are judgment calls.

One agent looks at that comparable sale and adjusts down by $15,000 for the superior kitchen. Another adjusts down by $25,000. A third decides the kitchen difference is outweighed by the subject the superior aspect of the subject property and adjusts up by $5,000. Three agents, the same comparable sale, three different conclusions - and none of them is necessarily wrong.

Multiply that across five or six comparable sales, each requiring multiple adjustments, and the range of legitimate conclusions widens considerably. By the time three experienced agents have worked through the same data set independently, a $40,000 to $60,000 spread in their conclusions is not a sign that someone is wrong. It is a sign that the interpretation process genuinely produces different outcomes in different hands.

The data is the starting point. The appraisal is what an agent builds from it. Like any argument from evidence, it reflects the judgment of the person building it - which comparables to weight, which adjustments to make, which market signals to emphasise. Different builders, different arguments, different conclusions.

The Motivation Behind the Number - What Vendors Need to Understand

Appraisals differ for two reasons. The first is interpretation - the same data producing different conclusions in different hands. The second is motivation - agents who are not all trying to produce the same type of answer.

The evidence-based appraisal is produced by an agent whose primary objective is accuracy. They select comparables on merit, apply adjustments with reasoning they can articulate, and arrive at a number grounded in what the data actually supports. This appraisal may sit in the middle of the range or at the lower end. It is the one most likely to reflect what a buyer will pay.

The second motivation is strategy - an agent who begins with a view of what the property should sell for and then constructs a campaign strategy around a specific price position. This might be a lower list price designed to attract more buyers and create competition, or a higher list price designed to test the top of the market before adjusting. The number they present reflects their strategic recommendation rather than their pure market assessment. Both can be legitimate, but the vendor needs to understand which one they are receiving.

The third motivation is listing acquisition. Some agents quote high to win the listing. The logic is straightforward: a vendor who receives three appraisals will often instinctively favour the highest because it confirms what they hope their property is worth. The agent who quotes highest wins the listing. After a few weeks on the market with no suitable offers, the agent begins the conversation about price adjustment. The vendor, already committed, adjusts.

Buying the listing is the term used within the industry for this practice. It is not illegal. It is widespread enough that vendors should be aware of it before they sit across from three agents with three different numbers and assume the highest one is the most optimistic reading of a genuine market opportunity. It may be. Or it may be a pitch.

The Questions That Reveal Whether an Appraisal Is Grounded

A defensible appraisal and a flattering one can produce numbers that are not far apart. The difference is in what sits behind the number - the evidence, the reasoning, and the the ability of each agent to explain both.

A defensible appraisal comes with specific comparable sales - addresses, sale dates, sale prices, and a clear explanation of how each one relates to the subject property and what adjustments were made. The agent can explain why they selected those comparables and not others. They can explain what assumptions they made and what would need to change for their number to be wrong.

A flattering appraisal is long on sentiment and short on specifics. Strong market conditions. Enthusiastic buyers. Beautiful presentation. The comparables are listed but not interrogated. The adjustments are implied rather than explained. What is missing is the reasoning that would allow a vendor to evaluate whether the number is grounded.

The test is direct. Ask each agent to identify the three comparable sales that most influenced their number and explain the adjustments they made for each one. Specificity in the answer signals an evidence-based appraisal. Deflection toward market conditions, buyer demand, or presentation quality signals the alternative.

The second test is asking each agent what would need to happen for their number to be wrong. An agent who has genuinely interrogated the evidence knows the assumptions their appraisal rests on and can articulate them. An agent who cannot answer that question has not built an appraisal - they have built a pitch.

How to Navigate Conflicting Appraisals Without Choosing the Wrong One

Averaging three conflicting appraisals is a common response and an unreliable one. The middle number is not a more accurate assessment of market value - it is a mathematical compromise between three different interpretations. The accuracy question requires looking at the evidence behind each number, not the position of each number relative to the others.

The more productive approach is to go back to the comparable sales. Request the specific sales each agent used and compare the lists. Where agents agree on the relevant comparables, look at how their adjustments differ. Where they disagree on which comparables are relevant, that disagreement itself is informative - it tells you something about which agent understands your property type and buyer profile better.

If two of the three agents used similar comparables and reached similar conclusions, and the third used a different selection and reached a significantly different number, the outlier warrants scrutiny. It may be correct - the third agent may have identified a comparable the others missed. Or it may reflect the listing acquisition motivation.

Pricing at the defensible value produces a stronger outcome than pricing above it. Overpriced properties attract fewer buyers, spend more days on market, and are often sold for less than they would have achieved at a realistic entry price - because the extended campaign communicates to buyers that something is wrong, and that perception shifts the negotiating dynamic against the vendor.

The question is not which agent told you what you wanted to hear. The question is which agent can show you the evidence behind the number they gave you.

House Appraisal Questions - Answered

Can I trust a real estate agent appraisal?

A well-constructed appraisal based on relevant comparable sales and considered adjustments will typically fall within five to ten percent of the eventual sale price in a stable market. The accuracy depends on the quality of the comparable sales available, the the agent knowledge of local buyer behaviour, and the stability of market conditions at the time of the appraisal. In thin markets with low transaction volumes, or during periods of rapid price movement, the margin of error widens. An appraisal is a professional opinion, not a guaranteed price - and it should be evaluated on the quality of the evidence behind it rather than the confidence with which it is delivered.

Is it normal to get very different appraisals from different agents?

Receiving significantly different appraisals from different agents is common and does not necessarily mean any of them is wrong. Appraisals differ because comparable sales require interpretation - which sales are most relevant, how to adjust for differences between comparable properties and the subject property, and what weight to give to current market conditions. Different agents apply different judgment to the same data and reach different conclusions. The additional factor is motivation - not every appraisal is produced with the same objective, and understanding the difference between an evidence-based appraisal, a strategic recommendation, and a listing acquisition pitch is what allows a vendor to evaluate the numbers they receive.

Is the agent with the highest valuation the right one to choose?

The highest appraisal is the least reliable starting point for agent selection. It is the number most likely to reflect optimistic interpretation or a deliberate listing acquisition strategy rather than a genuine evidence-based assessment. The test is not the number itself but the evidence behind it - which comparables were used, what adjustments were made, and whether the agent can articulate the assumptions their number rests on.

What is the difference between a property appraisal and a valuation?

A real estate agent appraisal is a professional opinion of likely sale price, provided at no cost as part of the agent selection process. It is not a certified valuation. A formal property valuation is conducted by a licensed valuer, follows a regulated methodology, and produces a report that lenders and legal processes will accept. Certified valuations typically cost between $300 and $800 depending on property type and complexity. For most residential sales, an agent appraisal is the appropriate starting point - a formal valuation is required when a lender needs security assessment, a legal matter requires an independent opinion, or a vendor wants a certified benchmark before proceeding.

The Northern Adelaide View on Property Appraisal and Agent Selection

For vendors across the Gawler District considering an appraisal, the most useful preparation is understanding that the numbers they receive will likely differ - and that the difference is informative rather than alarming, provided they know which questions to ask of each agent who delivers one.
www.gawlereastrealestate.au
supports homeowners across the Gawler District and northern Adelaide suburbs with residential property appraisals built on specific comparable-sales evidence - with the selection criteria, adjustments, and assumptions explained so vendors can interrogate the number the same way a buyer would.