Explainer
How does migration affect housing demand in Australia?
Explains why migration can create immediate housing demand while supply responds slowly, and how TAMM turns NOM into a dwelling-demand signal.
Migration affects housing demand because new usual residents need somewhere to live immediately, while new housing supply takes time. TAMM turns NOM into an estimated dwelling requirement by dividing the net population addition by an average household-size assumption.
Demand moves faster than supply.
When people arrive and become usual residents, housing demand appears quickly. New dwellings require land, approvals, finance, materials, trades, infrastructure, and time.
That timing gap is why migration can be economically positive at the national level while still causing visible pressure in local rental markets.
Location matters as much as the national number.
A national NOM figure does not tell you where pressure lands. If new arrivals concentrate in Sydney, Melbourne, Brisbane, Perth, or other tight markets, the local housing effect can be stronger than the national average suggests.
TAMM therefore includes both a NOM lever and a capital-city concentration lever. The model rewards migration settings where housing delivery and settlement capacity keep pace with population growth.
Related questions
Does migration explain every housing problem?
No. Housing pressure also depends on planning, finance, domestic population change, household formation, investor behaviour, construction costs, and infrastructure.
Why does TAMM use household size?
Household size is a simple way to translate population growth into approximate dwelling demand. It is a model assumption, not a precise allocation of people to homes.
Sources
- ABS National, state and territory population, June 2025 Estimated Resident Population of 27,614,411 at 30 June 2025, annual growth of 420.1k, and annual NOM of 305.6k.
- ABS National, state and territory population, September 2025 Estimated Resident Population of 27,724,744 at 30 September 2025, with annual NOM of 311k.
- ABS Regional Population 2024-25 Capital city populations at 30 June 2025, including Sydney, Melbourne, and Brisbane.
- National Housing Supply and Affordability Council, March 2026 219k homes completed over five Accord quarters.
- HIA skilled trades shortage, February 2025 Cites an estimated need for 83k additional workers in key residential construction trades to meet the Housing Accord target.
The full evidence trail is on the Sources page.