Why it happens
Understand the mechanism before you dispute the number. Lender valuations are procured under cost and time pressure, and frequently are not full inspections at all.
Automated or desktop assessment
No inspection occurred. The figure is modelled, so renovations, condition and outlook are invisible to it.
Missed comparable sales
Very recent sales, off-market transactions and settlements not yet recorded may not have been available to the valuer.
Conservative instruction
Some lender instructions require the valuer to adopt a cautious position, particularly for unusual property or in falling markets.
Property type risk flags
Small units, student accommodation, serviced apartments, high-density towers and rural-residential holdings all attract policy caution.
Undocumented improvements
Work without council approval or without documentation is often discounted, because the valuer cannot verify it.
What to do first
Ask for the valuation, or at minimum for the comparable sales relied on. You cannot dispute a figure you cannot see the basis of. Lenders vary in what they will release, but the comparables are frequently obtainable and are the whole argument.
Then check those comparables yourself against your property. The three questions that matter: are they genuinely similar in land size, condition and position? Are they recent? And is there a better sale the valuer missed? A single genuinely comparable sale at a higher price, in the same pocket, within the last three months, is more persuasive than any amount of assertion.
Building the review request
Submit a written request for review through your broker or lender, with an evidence pack attached. Keep it factual and short — the credit team reading it has minutes, not hours.
Comparable sales
Three to five recent sales, with addresses, dates and prices, and one line on why each is comparable to yours.
Improvement documentation
Council approvals, building plans, certificates and invoices for renovations, with before-and-after photographs.
Correction of factual errors
Wrong land area, wrong bedroom count, missed second dwelling, missed subdivision potential — factual errors are the strongest ground.
An independent valuation
A full valuation from a registered valuer where the gap is material and the above has not resolved it.
When an independent valuation is worth commissioning
It is worth it when the gap is large enough to change your outcome — pushing you above 80 per cent loan-to-value and into lenders mortgage insurance, blocking a refinance, or threatening a purchase — and when you have a genuine basis to believe the lender's figure is wrong.
It is not worth it if you simply hoped for a higher number. An independent valuation is evidence, not advocacy: a registered valuer will produce the figure the evidence supports, which may confirm the lender's assessment. If it does, you have learned something useful for a few hundred dollars.
The alternative route: change lender
Different lenders use different valuers, different panels and different risk policies. The same property can be assessed materially differently by two institutions in the same week, particularly for unit stock or unusual holdings.
Where a review fails and the gap remains material, a broker moving the application to a lender with a more suitable policy is frequently faster and cheaper than continuing to fight the first valuation. Weigh that against any rate or fee consequences before you commit.