Valuing a property as it stood, at a date already gone.

The market at that date. The valuer assembles sales of comparable properties that settled around the valuation date and analyses them as a valuer at the time would have. Sales that occurred after the date are not evidence of value at the date — they are hindsight, and using them is the most common way these reports fail.

The property at that date. The house today is not necessarily the house then. A kitchen replaced in 2019 cannot be valued into a 2012 assessment. This is why documentary evidence matters so much: photographs, agents’ marketing material, building approvals and invoices for later works, historical rates or valuation notices, and plans.

The context at that date. Zoning, overlays, access and surrounding development all change. A property now overlooking a park may have overlooked a construction site; a lot now serviced may not have been. The report has to assess the property in its own period, not in ours.

A current inspection is still required. The valuer needs today’s condition as a baseline, then works backwards — removing improvements made since, restoring what documentary evidence shows was there. Working from records alone, with no inspection, materially weakens the report.

Date of death. Market value on the day the owner died, for probate, estate distribution and — where the law resets it — a beneficiary’s capital gains cost base.

Capital gains tax. The date is fixed by the legislation, not by convenience: when a main residence first produced income, when a dwelling changed use, when an asset was acquired, or where market value is substituted for consideration.

SMSF reporting. Market value at 30 June, which is frequently assessed after the fact once the auditor asks.

Family law. Sometimes a past date matters — the date of separation, or the date an asset was acquired or contributed — alongside a current figure.

Duty on a completed transfer. Where a transaction has already occurred, market value is assessed as at the transaction date.

Statutory objections. Site value as at the date the relevant Act fixes for the assessment being objected to.

Which purposes allow a retrospective date

Most useful: photographs of the property from around the valuation date — including old listing photos if it was marketed. Approvals and invoices for work done since. Historical rates or land valuation notices. Any earlier valuation or appraisal, even a rough one.

Genuinely not needed: your own estimate of what it was worth. It will not be used, and volunteering a target figure only makes the report harder to defend if it is ever tested.

Worth knowing: a longer gap does not make a retrospective valuation impossible, but it does increase the work and therefore the fee, because more of the report rests on reconstructing the property and the market from documents. A valuation to a date in the 1990s is a bigger exercise than one to last financial year, and we will quote it as one.

How a retrospective date affects the fee

Can a property valuation be backdated?

Yes. A retrospective valuation assesses market value as at a specified past date using the sales evidence that existed at that date and the property’s condition as it was then. It is standard practice for date of death, capital gains tax, separation, duty on completed transfers and statutory objections. What a valuer must not do is allow later market movement to influence the figure — that is what distinguishes a retrospective valuation from a current one with an old date on it.

How far back can you go?

There is no fixed limit. Valuations to dates decades in the past are prepared regularly, most commonly for pre-1985 acquisitions and long-held inherited property. The constraint is evidence rather than time: the further back the date, the more the report relies on documentary evidence of the property’s condition then and on historical sales records, which increases the work and the fee.

Do you still need to inspect the property?

Yes, in almost all cases. The valuer needs the property’s current condition as a baseline and then works backwards, removing improvements made since the valuation date and restoring what documentary evidence shows was there. A report prepared entirely from records without an inspection is materially weaker and is more readily challenged by a reviewer or on cross-examination.

Is a retrospective valuation more expensive?

Usually, and the reason is scope rather than surcharge. A current valuation uses live evidence; a retrospective one requires assembling period sales, analysing them as a valuer at the time would have, and establishing the property’s condition at the date from documents. The further back the date and the less documentation that survives, the more of that work there is. The fee is fixed and quoted before you instruct either way.