Vacancy under 1%: which capitals are tightest and why
Eighteen of the 64 suburbs in our published sample now report rental vacancy under 1%, and two-thirds of them sit in Perth or Adelaide rather than Sydney or Melbourne.
What “under 1%” actually means
A rental market is generally considered tight below 2% vacancy and genuinely scarce below 1%. In our published sample of 64 suburbs, 18 are currently under 1%, which is a higher share than most people assume when they picture the national rental market as uniformly stretched. It isn’t uniform. It’s concentrated, and the concentration has a clear geography.
Perth and Adelaide, not Sydney and Melbourne
Of those 18 suburbs, seven are in greater Perth and five are in greater Adelaide. Between them, that’s two-thirds of the tightest rental markets in the sample sitting in two cities that don’t usually lead vacancy headlines. Sydney contributes one (Penrith), and Hobart and Darwin metro areas make up the rest. Not a single Melbourne or Brisbane suburb in our sample cracks the sub-1% threshold; the loosest readings we track, Footscray at 2.1% and Fortitude Valley at 2.5%, both sit in those two cities.
| Suburb | State | Vacancy | Rental yield | Days on market |
|---|---|---|---|---|
| Midland | WA | 0.5% | 4.5% | 10 |
| Penrith | NSW | 0.6% | 3.0% | 31 |
| Rockingham | WA | 0.6% | 4.0% | 10 |
| Armadale | WA | 0.6% | 4.5% | 10 |
| Joondalup | WA | 0.7% | 3.5% | 12 |
| Norwood | SA | 0.7% | 2.3% | 24 |
| Fremantle | WA | 0.8% | 3.3% | 15 |
| Leederville | WA | 0.8% | 3.0% | 12 |
| Mandurah | WA | 0.8% | 4.2% | 12 |
| Prospect | SA | 0.8% | 2.5% | 22 |
Why Perth clusters at the bottom
Perth’s outer suburbs, Midland, Rockingham, Armadale and Mandurah, pair sub-1% vacancy with days on market in the low teens or single digits. That combination is unusual: tight rentals and fast-selling houses at the same time. It points to population growth outrunning new dwelling approvals across the metro area rather than any single suburb-level story. The yields in this group, 4.0-4.5%, are also comfortably above the sample median, so investors chasing income are being rewarded here alongside the capital growth.
Adelaide’s cluster looks different. Norwood, Unley and Prospect combine sub-1% vacancy with yields of 2.3-2.5%, well below the sample average of 4.0%. These are blue-chip inner-Adelaide addresses where scarcity is a function of a fixed, character-housing supply rather than a growing population chasing too few new builds. Tight rentals here say more about stock that will never be replaced than about a housing shortfall being built out of.
The same vacancy number, sub-1%, means something structurally different in outer Perth than it does in inner Adelaide. One is a supply race; the other is a supply ceiling.
The bottom line
Rental scarcity below 1% is real but geographically concentrated, sitting mostly in Perth and Adelaide rather than the two largest capitals. The cause differs by city, undersupply in outer Perth against a structural ceiling in inner Adelaide, and that distinction matters more for strategy than the vacancy number alone.