We rate every suburb with a Strong, Good, Fair, or Weak signal. On 12,360 walk-forward postcode-months, those ratings stack strictly monotonically against the next 12 months of market-adjusted returns.
1.85×
Strong Signal growth vs market (12mo)
71%
Strong Signal beat-market rate
12,360
Postcode-months backtested
The signal-strength rating is the headline output of the system. Detection answers one question. Ranking answers another. We run both — then combine them into a four-tier rating.
The five-signal formula answers “is something actually happening here?” It catches suburbs where growth, DOM, vacancy, yield and headroom all fire at once — 85.7% detection accuracy, zero false positives on the decade backtest. This is the entry trigger. The methodology, signals, and 42-suburb breakdown are below.
Detection alone can't tell you how much room is left to run. A suburb at 1.6× the city median that's already rallied is a different bet than one at 0.7× the median just starting to move. Headroom answers “is there still gap to close?”
| Tier | Rule | Share | 12mo growth (median) | Beat market |
|---|---|---|---|---|
| Strong | Currently booming, below market median, less than 30% of affordability gap consumed | 17.0%(n=2,103) | 16.4% | 71% |
| Good | Warming or booming, below market median | 27.1%(n=3,349) | 9.2% | 55% |
| Fair | Warming or booming, priced between 1.0x and 1.5x the city median | 46.8%(n=5,788) | 6.6% | 47% |
| Weak | Expensive (1.5x or more than the city median) | 9.1%(n=1,120) | -0.1% | 28% |
After subtracting the broader market's monthly performance — so we're measuring suburb-vs-suburb skill, not just being long the Australian property market — the four signal tiers stack cleanly. Over the next 12 months, Strong Signal suburbs grew at a median of 16.4% while the median Australian suburb grew 8.9% — that's roughly 1.85× the market growth rate, and Strong Signal beat the market 71% of the time. Weak Signal, at the other end, barely moved. Monotonic across all four tiers is the test that matters — it says the rating is actually ranking, not just sorting noise.
Signal-strength discrimination backtest: 12,360 historical postcode-months since January 2015 across the SQM-derived price universe. Walk-forward, no lookahead — signals are assigned using only data available at each evaluation date, then scored against the following 12 months.
Real suburbs, real data, real outcomes — at three different time horizons.
Median at detection: $725K
Score
65
Annual Growth
13.5%
Days on Market
23 days
Vacancy
1.6%
Detected Q1 2021. Brisbane values rose 75% from June 2020. Falling vacancy trend signalled tightening supply.
Median at detection: $265K
Score
87
Annual Growth
24%
Days on Market
22 days
Vacancy
0.4%
Detected Q1 2022. Elizabeth suburbs saw 33%+ growth through 2022. Ultra-low vacancy and fast sales confirmed the boom.
Median at detection: $365K
Score
81
Annual Growth
9%
Days on Market
11 days
Vacancy
0.65%
Detected Q3 2022. Perth's south-east corridor saw 34% growth over the following year. Just 11 days on market.
Median at detection: $550K
Score
74.5
Annual Growth
22%
Days on Market
20 days
Vacancy
0.4%
Detected 2024. Rapid growth in Perth's affordable outer ring. Sub-1% vacancy and strong yields.
Median at detection: $370K
Score
92
Annual Growth
33.33%
Days on Market
15 days
Vacancy
<1%
Flagged in the latest production run. Exceptional growth rate with fast turnover — classic boom signature.
Median at detection: $544K
Score
82.17
Annual Growth
23.08%
Days on Market
15 days
Vacancy
<1%
Flagged late 2025. North Queensland showing strong momentum with tight rental markets.
Validated across 78 Australian suburbs — 42 within our target price range of ≤$800K.
24/28
Boomed suburbs correctly detected (≤$800K)
0/14
Non-booming suburbs incorrectly flagged
85.7%
Sensitivity (true positive rate)
100%
Specificity (zero false positives)
Every suburb in the backtest within our ≤$800K target range — boomed, missed, and correctly identified non-booms.
| Suburb | State | Median | Score | Classification | Result |
|---|---|---|---|---|---|
| Stones Corner | QLD | $725K | 65 | Early Boom | ✓ Detected |
| Armadale | WA | $365K | 81 | Boom | ✓ Detected |
| Elizabeth | SA | $265K | 87 | Boom | ✓ Detected |
| Mandogalup | WA | $550K | 74.5 | Boom | ✓ Detected |
| Mildura | VIC | $452K | 69 | Early Boom | ✓ Detected |
| Rangeway | WA | $370K | 92 | Boom | ✓ Detected |
| Heatley | QLD | $544K | 82.2 | Boom | ✓ Detected |
| Kalbarri | WA | $320K | — | Boom | ✓ Detected |
16 more rows hidden
| Suburb | State | Median | Score | Classification | Result |
|---|---|---|---|---|---|
| Bundaberg South | QLD | $350K | <65 | Warming | ✗ Missed |
| Kwinana Town Centre | WA | $390K | <65 | Warming | ✗ Missed |
| Shorewell Park | TAS | $355K | <65 | Warming | ✗ Missed |
| Berriedale | TAS | $480K | <65 | Warming | ✗ Missed |
All 4 missed suburbs had decelerating quarterly growth despite strong annual growth — the formula caught the slowdown.
| Suburb | State | Median | Score | Classification | Result |
|---|---|---|---|---|---|
| Southbank | VIC | $600K | — | Stable | ✓ Correct |
| Darwin CBD | NT | $475K | — | Stable | ✓ Correct |
| Nar Nar Goon | VIC | $580K | — | Stable | ✓ Correct |
| Crib Point | VIC | $540K | — | Stable | ✓ Correct |
| Bangholme | VIC | $620K | — | Stable | ✓ Correct |
| Ballarat Central | VIC | $450K | — | Stable | ✓ Correct |
| Bendigo | VIC | $480K | — | Stable | ✓ Correct |
| Rye | VIC | $720K | — | Stable | ✓ Correct |
| Lalor Park | NSW | $750K | — | Stable | ✓ Correct |
| Jilliby | NSW | $780K | — | Stable | ✓ Correct |
| Shoalhaven Heads | NSW | $690K | — | Stable | ✓ Correct |
| Red Hill | ACT | $750K | — | Stable | ✓ Correct |
| Geilston Bay | TAS | $480K | — | Stable | ✓ Correct |
| Youngtown | TAS | $420K | — | Stable | ✓ Correct |
These suburbs showed no boom-level growth — none were falsely flagged by the formula.
Under the hood. A suburb must fire on all of these signals simultaneously — that's what separates a boom from a blip.
Is the suburb accelerating?
Compares quarterly growth to annual growth — catching acceleration before the headline number catches up.
How strong is the absolute growth?
Annual growth rate thresholds that separate normal appreciation from boom-level movement.
How fast do properties sell?
Days on market plus vacancy rate — when both are low, demand is outstripping supply.
Will growth continue?
Rental yield and vacancy trend direction — high yield with falling vacancy signals ongoing demand.
Room to grow?
Price relative to the city median — suburbs well below the metro average have more room to run.
A suburb must fire on multiple signals at once to score above the boom threshold. One strong metric alone isn't enough — the formula demands convergence.
Suburb-level data tables grouped by metric, refreshed every cycle.
Sign in with your name and Australian mobile to access the full scored suburb map and your watchlist. We'll only contact you about your watchlist and any matched property professionals — and only introduce you to a specific professional after you confirm that introduction.
Sign in to BoomAUReply STOP to opt out anytime. Privacy Policy.