Investment Growth Rate FAQ

The investment growth rate is our estimate of how quickly property values have changed in a locality (street, area, or district), based only on homes with repeat sales.

What data is included?

• Only properties with at least two recorded sales with valid prices.
• The first and latest sale are used for each property.
• Pairs less than one year apart are excluded to avoid noisy annualised percentages.

How is growth calculated per property?

For each repeat-sale property, we calculate annualised growth (CAGR):

CAGR = (latest_price / first_price)^(1 / years_held) - 1

This gives a yearly rate, so properties held for different lengths of time are comparable.

How is growth calculated for a street, area, or district?

• We compute CAGR for each eligible property in that locality.
• We report the median of those annual growth rates, not the average.
• The median is less affected by one-off spikes or unusual sales.

What does “over the last X years” mean?

X years is the time window from the earliest first-sale date to the latest re-sale date among the repeat-sale properties used in that locality metric.

Why might a page not show this metric?

• There may be too few repeat-sale properties in that locality.
• Sales may be missing prices or valid dates.
• Available repeat sales might be too close together in time (< 1 year).

Important caveat

This is a directional indicator, not a valuation model or financial advice. It reflects historical recorded transactions in the Property Price Register and does not control for extensions, renovations, property condition, or market micro-cycles.