Short answer
The absence of a recent identical sale does not, by itself, mean a property cannot be valued. It also does not establish a ceiling on its value. The valuer considers a wider evidence set, tests its relevance and explains the reasoning behind the conclusion.
Where reliable evidence remains limited, the report should explain the resulting uncertainty. Some instructions may need further investigation or a revised scope before a supportable opinion can be provided.
Start with the market in which the property competes
A quiet suburb or unusual property can have few directly comparable transactions. The useful question is which properties compete for the same buyers, rather than which sales happen to be closest on a map.
A larger rural residential holding, a compact unit and a renovated family house can require very different evidence searches. Not every nearby sale belongs to the same market. The comparable sales guide explains how location, property characteristics and transaction circumstances affect relevance.
How can the evidence search be broadened?
Possible responses include:
- Looking further back in time for strongly comparable transactions.
- Considering nearby or competing locations with similar buyer demand.
- Analysing properties with different but identifiable land, accommodation or condition attributes.
- Examining a wider price bracket to establish useful superior and inferior comparisons.
- Investigating transaction terms, marketing history and the reasons a sale may be unusual.
Older evidence with strong comparability may be more informative than a recent sale of a fundamentally different property. The valuer must still consider whether market conditions changed between the sale and valuation dates.
Is there an evidence hierarchy?
Verified transactions involving comparable property interests usually provide stronger direct support than asking prices or broad market commentary. Their usefulness still depends on the date, circumstances and comparability of each transaction.
Listings can indicate competing stock, marketing expectations and buyer alternatives. They do not establish the price at which a transaction has occurred. Broad indices and commentary are contextual checks, particularly where the subject property’s market segment may behave differently.
The RICS comparable evidence standard discusses evidence sources and their relative importance. A hierarchy supports judgement; it does not remove the need to assess the actual evidence. See also why market evidence matters.
Can older sales be adjusted for market movement?
Where supportable, the valuer can analyse movement between the transaction and valuation dates. Relevant evidence might include repeat transactions, comparable sales over time and changes within the same property segment.
Applying a city-wide growth percentage to every older sale can be misleading. There may be insufficient evidence to isolate a precise adjustment. The report should explain the basis used and avoid presenting uncertain inputs as exact calculations. Read how valuers use market updates.
Can another valuation method help?
Depending on the property and available information, land-value evidence and a Summation or Cost Approach may offer a cross-check. Building expenditure is not automatically the market contribution of the improvements.
For income-producing property, rental evidence, outgoings and investment-market evidence may also be relevant. A method is useful only if its assumptions and inputs are supportable and it reflects how the relevant market operates.
The residential valuation methods guide explains why adding a weak secondary calculation does not necessarily improve a valuation.
How is a conclusion reached without identical sales?
The valuer compares the subject’s strengths and weaknesses with the evidence, using qualitative and quantitative analysis where appropriate. An adjustment needs market support; there is no standard percentage for every extra bedroom, larger block or renovation.
The conclusion is a reasoned reconciliation, not the average of the available prices. The report should explain which evidence carried the greatest weight and why. Residential sales evidence and rural residential comparisons illustrate how the relevant attributes can differ.
What should the owner provide?
Provide the valuation purpose and date, property address, plans, renovation history and any known transactions that may assist. Include information about unusual features, title or planning issues and any limited inspection access.
The valuer should identify material evidence gaps and assumptions and limitations. A lack of transactions is a reason for careful analysis and clear reporting, not a reason to invent precision.
For property in Canberra, the ACT or surrounding NSW, Northbourne Valuers can discuss whether the proposed instruction and evidence are sufficient to proceed.
Prepared by: Tigran Amiyants, Certified Practising Valuer (CPV), Managing Director, Northbourne Valuers.
Last reviewed: 12 September 2026.
General information note: This page provides general property valuation information and is not a valuation report or legal, taxation, accounting or financial advice. A valuation depends on the agreed property interest, purpose, valuation date, evidence, scope and intended users. Obtain advice appropriate to your circumstances.