Methodology

Every number on WorthIt is calculated directly from recorded resale transactions. Nothing is estimated or modelled. This page explains exactly how each figure is produced so you can interpret it correctly — and verify it against the underlying official data.

Deal Score (the colour-coded markers)

The Deal Score compares a transaction's price per square metre against the median price per square metre of comparable nearby sales — same flat or property type, in the same area. We use the ratio (this sale's $/sqm) ÷ (nearby median $/sqm) and map it to a colour:

• Green — ratio around 0.70 or below: notably below the local median (good value).
• Blue — ratio around 1.0: roughly in line with comparable sales (fair price).
• Red — ratio around 1.30 or above: a premium to the local median.

Colours interpolate smoothly between these anchors. Because it is benchmarked to comparable sales, the Deal Score is a relative indicator of value, not a valuation or an appraisal.

Price trends

Trend charts plot average price per square metre over time rather than raw price. This is deliberate: raw average price swings month to month simply because the mix of flat sizes sold changes. Price per square metre is size-neutral, so the trend reflects genuine price movement. The 6-month, 1-year, 3-year, and 5-year change figures compare a 3-month rolling average at each end of the window, which smooths out the noise of thin-volume months.

Percentiles

The 10th to 90th percentile figures describe the spread of transaction prices for your search: the 10th percentile means 10% of sales were below that price, the 90th means only 10% were above it. The 50th percentile is the median. Percentiles give a fairer picture than a single average because they are not skewed by a few unusually high or low sales.

Units

Floor areas and price rates are displayed in square feet and price per square foot ($/sqft), converted from the square-metre values in the source data using the standard factor of 1 sqm = 10.7639 sqft.

Nearby & postal-code search

Searching a postal code finds transactions within a fixed radius of that location using mapped block and project coordinates, so results reflect the immediate area rather than a whole town.

WorthIt is informational only and is not financial, investment, or property advice. Always do your own due diligence. See data sources & limitations.