How Perth Got Here: The Migration Surge Decades in the Making

Perth's population crossed 2.3 million last financial year, according to Australian Bureau of Statistics estimates, and the rate of growth has not slowed. In the twelve months to June 2025, Western Australia recorded net overseas migration of roughly 54,000 people and net interstate migration that flipped decisively positive for the first time since the last iron ore boom peaked in 2013. The city absorbing most of that movement is Perth — and it did not happen overnight.

Understanding the pressure on suburbs from Ellenbrook in the north-east to Cockburn Central in the south requires going back further than the post-COVID mobility wave that most commentators reach for. The foundations were poured across several policy cycles, investment decisions, and global commodity shifts that all landed on Perth at roughly the same moment.

The Structural Forces That Stacked Up

The first force was federal. AUKUS, announced in September 2021, committed billions of dollars in defence infrastructure to HMAS Stirling on Garden Island — the naval base at the mouth of Cockburn Sound that will anchor Australia's nuclear-powered submarine program. Defence Housing Australia began acquiring and building properties across the Rockingham and Baldivis corridor almost immediately, drawing uniformed personnel and a shadow workforce of engineers, contractors, and security-cleared tradespeople from the eastern states. That pipeline has not stopped.

The second force was the state budget. WA's iron ore royalty windfall — the state collected more than $11 billion in royalties in the 2023-24 financial year alone — funded the Cook Labor government's Metronet rail expansion, which by mid-2026 has extended electrified lines to Morley-Ellenbrook and is under construction toward Byford in the south-east. Infrastructure at that scale creates jobs before a single train runs: civil engineers, environmental consultants, signalling specialists. Many of them moved here.

The third force was housing price relativity. Sydney's median house price sat above $1.6 million through most of 2025. Melbourne's hovered above $900,000. Perth's median, even after a sustained run of annual growth above 15 percent, remained under $750,000 for detached dwellings as recently as last December, according to REIWA data. That gap drove a calculable wave of interstate movers — many of them working remotely in tech, finance, or professional services — who traded a Sydney mortgage they couldn't afford for a Fremantle bungalow or a High Wycombe townhouse they could.

The Suburbs Feeling It Most

The geographic footprint of growth is uneven. The City of Swan, which takes in Midland, Ellenbrook, and the Ballajura corridor, added thousands of dwellings across 2024 and 2025 and its planning office has been operating with an extended backlog for development approvals. The City of Rockingham processed a record number of subdivision applications in the same period, driven almost entirely by defence-adjacent demand near the naval base.

Closer to the CBD, the inner-suburb rental market seized. Median weekly rents in Northbridge and Leederville hit $650 and $680 respectively by the first quarter of 2026, according to CoreLogic figures — up more than 40 percent from three years earlier. The community housing sector, led by organisations including Shelter WA and the Community Housing Council of WA on Pier Street in the city centre, has spent two years warning that the social housing waitlist — sitting above 25,000 households — would worsen before any state investment could absorb the demand.

State government construction programs, including Metronet transit-oriented development sites at Morley and Ellenbrook stations, are intended to deliver medium-density housing near rail. The first residential towers at those stations are not expected to settle until late 2027 at the earliest. For the tens of thousands of people who moved here in the past three years, that timeline offers little immediate relief. The city they chose is still building itself around them.