The infrastructure project landscape across Australia and New Zealand heading into 2026 shows significant variation in progress, with some major works advancing on schedule while others face delays or scope revisions.

Melbourne’s Suburban Rail Loop remains the single largest active infrastructure project in either country, with construction of the East section well underway. The project hit a significant milestone in December with completion of the first major tunnelling contract, though overall costs continue tracking above initial estimates. Current projections put the East section at around $50 billion, up from the original $34.5 billion estimate.

Sydney Metro West is progressing more smoothly than some anticipated, with tunnelling now 65% complete. The project is roughly on schedule for the 2030 opening target, though there’s minimal buffer in the timeline. The December update confirmed that station excavation has commenced at five of the seven planned stations.

Western Sydney Airport infrastructure is advancing on multiple fronts. The airport itself remains on track for late 2026 opening, while supporting road and rail connections face more variable timelines. The M12 Motorway is substantially complete, but the airport rail link timeline has been pushed back from 2026 to 2028.

Brisbane’s Cross River Rail achieved a major milestone with completion of all tunnelling works in November. The project is now focused on station fit-outs and systems installation, with the 2025 completion target seemingly achievable. This represents one of the infrastructure success stories of recent years—delivered on time and close to budget.

In New Zealand, Auckland’s City Rail Link continues to face challenges. The project timeline has extended again, with the latest forecast suggesting opening in late 2026 rather than mid-2026 as previously indicated. Cost overruns have been substantial, with the project now expected to exceed $5.5 billion compared to initial estimates of $2.5 billion.

The Transmission Gully motorway in Wellington, which opened in 2022, continues to experience operational challenges. Ongoing remediation work is required due to construction quality issues, creating additional costs that are subject to commercial disputes between the government and contractors.

Queensland’s Bruce Highway upgrades represent a portfolio of projects at various stages. The Cairns Southern Access Corridor is progressing well and should open in mid-2026, while the Caloundra Road to Sunshine Motorway upgrade has commenced construction. Overall, the Bruce Highway program is consuming approximately $2 billion annually in combined federal and state funding.

South Australia’s North-South Corridor program is advancing incrementally, with the Darlington to Torrens section now substantially complete. The next phase, Torrens to Tom’s Court, is in detailed design, but construction commencement has been delayed from 2026 to 2027 due to funding constraints.

Perth’s Metronet program continues to deliver projects, though not always to original timelines. The Morley-Ellenbrook line opened successfully in 2024 and is performing well. The Byford extension is under construction and tracking to a 2027 opening. The Airport line has been delayed again, with opening now expected in 2028.

New Zealand’s roading investment has shifted toward maintenance and smaller projects rather than major new highways. The previous Labour government’s pivot away from large highway projects has continued under the National-led coalition, though with more emphasis on targeted congestion relief rather than pure maintenance.

The trans-Tasman data cable project that’s been discussed for several years remains in planning stages. While both governments have expressed support, actual funding commitments haven’t materialised. The project’s business case continues to be refined, but procurement hasn’t commenced.

Renewable energy infrastructure is seeing substantial investment in both countries. Australia has numerous large-scale solar and wind projects under construction, with combined capacity of roughly 8 GW expected to come online during 2026. New Zealand’s renewable energy pipeline is smaller in absolute terms but proportionally significant, with around 1.5 GW of new wind and solar capacity in development.

Port infrastructure upgrades are proceeding at multiple locations. Port Botany’s expansion is continuing, though environmental challenges have slowed some elements. Port of Melbourne’s Webb Dock expansion is substantially complete. In New Zealand, the Ports of Auckland automation project is advancing, though it has faced industrial relations challenges.

Water infrastructure is receiving renewed attention after being underinvested for decades. Melbourne’s Western Treatment Plant upgrade is underway, while Sydney Water has commenced the Upper Canal project. New Zealand’s Three Waters reform program remains politically contentious, with the new government working to substantially revise the previous framework.

Social infrastructure projects show mixed progress. Several major hospital redevelopments are underway—Melbourne’s Footscray Hospital, Sydney’s Westmead expansion, and Auckland’s new Waikato Hospital are all in construction. However, school infrastructure programs in both countries are being scaled back as government budgets tighten.

The defence infrastructure pipeline has expanded significantly, particularly in Australia. AUKUS-related construction at various naval bases is ramping up, though much of this work is not publicly detailed for security reasons. The Garden Island expansion in Sydney and Henderson complex upgrades in Perth are both substantial programs.

Looking at the overall pipeline, Infrastructure Australia’s latest priority list includes 152 projects with a combined value exceeding $200 billion. However, funding commitments exist for less than half of these projects. New Zealand’s equivalent pipeline totals around $40 billion but faces similar funding constraints.

Project delivery capability remains a constraint in both countries. Engineering and construction firms report skilled labour shortages in specific trades, particularly electrical and mechanical work required for complex projects. Some projects are experiencing delays simply due to inability to mobilise sufficient workforce.

The cost escalation environment has improved somewhat from the extreme levels of 2021-2023, but construction costs remain elevated. Material costs have stabilised but not declined meaningfully. Labour cost growth continues at 4-5% annually, above general inflation.

Looking ahead to 2026, the infrastructure outlook is for steady progress on committed projects but minimal new major project announcements. Government fiscal positions in both countries aren’t strong enough to support major new infrastructure commitments. The focus will be on delivering what’s already underway rather than expanding the pipeline.