Australia

Australia's residential market closed 2025 with demand still materially above prepandemic norms, supported by population growth and tight rental conditions. Net overseas migration was 306,000 in FY2024-25 (down from 429,000 a year earlier), which still adds meaningful incremental households in Sydney, Melbourne, Brisbane and Perth. Supply remains the binding constraint: National Cabinet's Housing Accord targets 1.2 million new welllocated homes over five years from 1 July 2024, yet independent analysis has warned the system is unlikely to meet the trajectory without faster planning approvals, higher construction productivity and more build capacity. Construction indicators were uneven through late 2025; ABS building approvals showed volatility monthtomonth (for example, total approvals fell in Oct 2025 then rebounded strongly in Nov 2025), consistent with developers managing financing and cost pressures. Price momentum reaccelerated in 2025: Cotality's Home Value Index rose 8.6% over the calendar year (about $71,400 added to the national median dwelling value). PropTrack's index also showed broadbased appreciation over the year to Dec 2025, with house values up 9% and unit values up 8.3% (national medians about $977k for houses and $717k for units). Rents stayed a core driver of investor maths: SQM Research reported the national rental vacancy rate at 1.4% in Dec 2025 (43,850 vacant dwellings), still below longrun averages even after a seasonal lift. Consumer behaviour is increasingly 'downmarket': affordability is pushing buyers toward smaller dwellings, outerring suburbs and select regional nodes, with regional values outperforming capitals in 2025 (+9.7% vs +8.2% per Cotality commentary). Technology is now a competitive moat: realestate.com.au is deploying AIdetected listing features and OpenAIpowered conversational experiences for valuation and search, while Domain has been building AI assistants for internal listing/metrics workflows. Into 2025, the opportunity set was concentrated in supplyadd strategies (infill, apartments, and buildtorent aligned with policy targets) and data/AIenabled lead conversion. Key risks were 'higherforlonger' rates and sharper compliance expectations (pricing transparency, privacy, and rentallaw reforms). A major sentiment inflection was CoStar's acquisition of Domain (binding agreement announced May 2025; completion announced Aug 2025), which resets competitive dynamics in Australian property classifieds and is likely to increase product spend, agent incentives and innovation pace across the sector.

Australia's portal market experienced its most significant structural shift in 2025 with CoStar Group's acquisition of Domain Holdings, completing in August 2025. This transforms what was previously a stable duopoly into a different competitive dynamic: REA Group (realestate.com.au) as the clear market leader, now facing a challenger backed by one of the world's most capitalised commercial data and analytics businesses.

For REA Group, the CoStar-Domain combination creates a more sophisticated competitor than the old Domain under Nine Entertainment. Domain under Nine was primarily a media business that operated a portal; Domain under CoStar will be a proptech business with access to CoStar's commercial data infrastructure, AI tooling, and international reference cases. REA Group's response is a deepening of its own integrated platform: mortgage brokering through REA Financial Services, agent operating system products (Agency Advantage), and the PropTrack data intelligence layer. The REA-CoStar duopoly that is emerging is fundamentally different from the media-era portal competition of 2015-2020.

The CoStar playbook for Domain will likely mirror elements of its Homes.com strategy in the US: invest heavily in content quality, introduce agent-level brand differentiation tools, and cross-sell commercial and residential intelligence to the same professional client bases. In Australia, CoStar already has a commercial property data presence through CoStar Australia, which gives Domain access to a professional data client base that REA does not service directly. The cross-market data product opportunity is significant for institutional clients, fund managers, and developers operating across both residential and commercial.

On the market fundamentals, Australia is experiencing a housing supply crisis that creates an unusual paradox for portals: constrained supply means fewer listings per agent, which could reduce portal inventory attractiveness, but high prices and competitive buyer markets make portal visibility more valuable per listing. REA Group's data shows median days-on-market declining in most capital cities through 2025, which supports engagement quality metrics even as overall listing volumes stay below pre-rate-rise peaks.

For operators in the Australian market in 2026: the REA Group platform remains essential for residential reach in every major capital city market. Domain's product quality is improving under CoStar and is worth re-evaluating seriously, particularly for agencies with commercial cross-over. PropTrack intelligence (available through REA professional subscriptions) is increasingly useful for vendor education and comparative market analysis. The AI-driven features on both platforms — particularly listing appraisal support, predictive buyer matching, and natural-language search — are improving rapidly and rewarding agents who invest in listing quality.

The Australian market's housing supply crisis adds a distinctive structural layer to portal strategy: when active listing inventory is constrained, every listed property receives more views per listing, making listing presentation quality and upgrade tier selection more consequential per property. In this environment, vendor education about depth product value is a core agent skill, not just a portal upsell. Agents who can demonstrate the concrete view and inquiry uplift from a Premiere+ listing versus Standard — using REA Group's or Domain's own analytics dashboards — will convert vendor investment more consistently. The migration of PropTrack and Pricefinder analytics into agent-facing dashboards is making this data increasingly accessible for those conversations.

The rental affordability crisis in Australian capital cities adds a dimension to portal strategy that is distinct from sales market dynamics. Vacancy rates in Sydney, Melbourne, Brisbane, and Perth have been at multi-decade lows through 2024-2025, generating high-intent rental search traffic that both REA Group and Domain are monetising through rental listing upgrades and tenant application tools. For property managers, the combination of high demand, low vacancy, and regulatory change (rental reform across multiple states) means that listing presentation quality and tenant screening tools — both of which portals increasingly provide — are directly relevant to management efficiency and owner outcomes.