Ask three different sources what your property is worth and you will usually get three different numbers. The bank will say one thing, a property website another, and a registered valuer’s report something else again. Owners often assume at least one of the three must be wrong, when in fact each is answering a different question.

Understanding what each number is for, and who it is prepared for, clears up most of the confusion. It also tells you which number you can rely on when money, tax or a court is involved.

What a bank valuation is actually for

A bank valuation is commissioned by and for the lender. The bank is asking what the property is worth as security if you stop paying and it has to sell, which is a different question from what your property would fetch on the open market. That framing shapes everything about the report.

Lender valuations are generally conservative. The valuer is instructed by the bank, owes their duty to the bank, and works within the bank’s lending guidelines. Many are not full inspections at all. A desktop valuation is done from sales data and records without anyone visiting the property. A kerbside valuation is a drive past to confirm the property exists and looks roughly as described. A full internal inspection is uncommon in routine lending.

Two consequences follow. First, you generally cannot rely on a bank valuation for anything beyond that loan. In many cases you will not even see the figure; you are simply told the loan is approved or that you need more equity. Second, a low bank valuation does not mean your property has lost value. The bank has simply priced its lending risk on that particular loan on the day.

What the algorithm can and cannot see

Online estimates are automated valuation models. They take recorded sales in your suburb, adjust for land size, bedrooms, bathrooms and recency, and produce a figure with a confidence range. For a standard house in a suburb full of standard houses that have sold recently, they can land surprisingly close.

The model works entirely from recorded data. It cannot see:

  • Condition. A renovated kitchen and a rotting subfloor look identical in a dataset. So do a restored Queenslander and one that has not been touched since the 1980s.
  • Improvements that never reached the record. A new pool, a granny flat or a full renovation completed since the last sale does not exist as far as the model is concerned.
  • The block itself. Slope, flood exposure, easements, planning overlays, street position and outlook drive real differences in Brisbane values. Two similar houses, one on a flat dry block and one that went under in 2022, can carry the same online estimate.
  • Anything unusual. Acreage, mixed-use property, partly built homes and one-off houses defeat the model, because there is nothing comparable to average.

The other limit is thin data. In a pocket with few recent sales, or in a market moving quickly, the algorithm is averaging stale evidence. The confidence range widens and the headline number drifts toward a guess. An online estimate is a reasonable starting point if you are curious, but courts, auditors and revenue offices generally will not accept one as evidence.

What a market valuation actually is

A market valuation prepared by a registered valuer answers the question the other two numbers do not: what this property would exchange for between a willing buyer and a willing seller, each acting knowledgeably and without compulsion, after proper marketing. That is the recognised definition of market value applied by the Australian Property Institute and used in valuation practice internationally.

Getting there takes a full internal and external inspection, measurement, analysis of truly comparable sales, and the adjustments a model cannot make for condition, renovations, easements and flood mapping. The result is a signed report that sets out its evidence and reasoning, signed by a valuer who is registered, insured and personally accountable for the figure.

That accountability matters. A signed valuation can be examined and defended if it is challenged, which is why the ATO, the Queensland Revenue Office, SMSF auditors and the courts ask for one.

When a certified valuation is the right instrument

The common situations look like this:

  • Tax events. Transfers between related parties, a home becoming a rental, and other capital gains tax events generally turn on market value at a specific date. The ATO expects a supportable figure, and a signed valuation, including a retrospective one, is the standard way to establish it.
  • Transfer duty. Where property changes hands between family members or for less than full price, the Queensland Revenue Office generally requires evidence of market value before assessing duty.
  • SMSF property. Fund assets must be reported at market value each year, and the fund’s auditor needs objective evidence to sign off. An online estimate on its own generally will not satisfy them.
  • Family law. Separating couples commonly rely on a single expert valuer appointed under the family law rules, so one independent figure serves both parties and the court.
  • Estates and disputes. Probate, deceased estates and disagreements between co-owners or beneficiaries need a number everyone can accept, prepared by someone with no stake in the outcome.

In each of these situations the number carries real consequences, and the parties relying on it need to know who stands behind it.

None of this makes bank valuations or online estimates useless. Each serves its own purpose, whether that is protecting the bank’s loan book or satisfying your curiosity, but neither will stand in for a signed valuation when one is required.

If you are weighing up which number matters for your situation, call the practice on 07 5550 4055. A short conversation will usually establish what kind of valuation you need, and whether you need one at all.