13 August 2026 market diary: Price per square foot needs a clear denominator

Retrospective market diary for 13 August 2026, prepared on 5 November 2026. The coverage date is an editorial reference, not a claim of original publication or a new event that day.

A price-per-square-foot figure looks precise because it is expressed as a neat number. Its usefulness depends on what area sits underneath it. Land area, built-up space and a strata parcel are not interchangeable measures. This diary entry examines how an apparently cheap listing can become a misleading comparison when the area basis is unclear. It does not publish a new district price index for the day.

Identify the figure being quoted

Ask the advertiser whether an area describes land, built-up space, a particular parcel or another measure. For a landed home, record land and interior space separately. For a strata unit, ask how accessory areas such as parking are described in relevant records. Have material discrepancies checked professionally. A portal field is a starting point for a question, not definitive proof of legal dimensions.

Imagine two terrace homes with the same asking price. One advertisement divides the price by land area; another uses a larger built-up figure after an extension. The resulting ratios cannot establish which is cheaper. Even if both use the same basis, condition, tenure, position and approvals may still explain a difference. Keep those attributes beside the calculation rather than hiding them behind the smallest ratio.

Use narrow comparable groups

Compare similar properties within the same development or immediate area before expanding. A high-rise unit and a landed house may serve different needs and include different rights and upkeep obligations. Where NAPIC transaction resources inform the research, check the record definitions and sale timing. Do not mix a historical transaction measure with today's advertisement without explaining what is being compared.

A buyer should also measure usable space during the viewing. A long corridor, awkward room or inaccessible storage can make a nominally larger home less functional. An efficiently planned smaller unit may be more useful for a particular household. That is not an argument to ignore area; it is a reminder that area and layout answer different questions.

Improve the comparison sheet

• Keep the original quoted area and identify its stated basis.
• Record uncertain measurements instead of silently correcting them.
• Separate land, interior layout and accessory rights.
• Compare similar property types and dates.
• Obtain appropriate professional verification when the difference matters.

Advertisers can help by naming the area basis clearly and correcting inconsistent fields. Readers can resist the temptation to treat a calculated ratio as a valuation. The best use of price per square foot is to organise a relevant comparison whose inputs are understood, not to manufacture certainty from incomplete listing data.