The three signals that move before prices do
Three inputs in the growth score, listing scarcity, rental vacancy and approval lags, typically shift months before a suburb's median price does, and each is weighted differently in the model.
Prices are a lagging number
A median price is the last thing to move. By the time it shows up in a quarterly release, the conditions that produced it have usually been building for six to twelve months. Our growth score is weighted to catch that build-up early, and three of its nine inputs do most of that early work: listing scarcity, rental demand and new supply pressure. Sales momentum and days on market confirm the trend once it is underway; these three tend to announce it first.
Signal one: listing scarcity
Listing scarcity carries 15% of the score, the second-heaviest weight after sales momentum, because stock on market relative to a suburb’s five-year norm is one of the cleanest early reads we have. Midland, WA is the sharpest current example: vacancy at 0.5%, days on market down to 10, and a growth score of 66 that was still in the low 50s a year ago. None of that shows up in the median price yet in a way most buyers would notice; the scarcity was there first.
Signal two: rental pressure
Rental demand carries 14% of the score, built from vacancy and rental growth relative to the state benchmark. Palmerston, NT shows this in its purest form: vacancy of 0.8%, a 6.3% gross yield, and interstate investor inquiry up 94% year on year. Tight rental markets tend to pull sale prices along behind them within a year, as renters who can afford to buy start doing so rather than compete for scarce leases.
- Scarcity answers: how much stock is actually on the market right now?
- Rental pressure answers: are tenants competing hard enough that buying starts to look better than renting?
- Approval lags answer: is new stock coming that will relieve both of the above?
Signal three: approval lags
New supply pressure is the only negative-weighted input, 5% of the score, and it works in reverse: a rising share of approved dwellings against existing stock pulls the score down, because it signals relief is on the way. Fortitude Valley illustrates the flip side. Vacancy there has loosened to 2.5% and days on market has stretched to 55 even as twelve-month growth sits at 19.8%, a sign that unit supply is starting to catch up with demand faster than the median price has adjusted to reflect it.
Scarcity, rental pressure and approval lags move first because they describe behaviour, not transactions. A transaction is the last step in a chain that starts with someone deciding there isn’t enough to go around.
No single signal is reliable alone. Scarcity without rental pressure can just mean a quiet quarter. Rental pressure without approval data can hide a wave of new supply about to land. The three together, read against a suburb’s own five-year norm rather than a national average, are what the growth score is built to weigh at once, precisely so that no single input dominates the read on its own.
The bottom line
Listing scarcity, rental pressure and approval lags move before the median price does because they measure intent and constraint rather than settled sales. Watching all three together, rather than waiting for a price release to confirm what they already show, is the difference between reacting to a market and anticipating one.