Canberra's Office Market Finds Its Floor — and Savvy Tenants Are Moving Fast

Canberra's CBD office vacancy rate has dropped to 9.2 percent in the June 2026 quarter, the lowest reading in three years, according to Property Council of Australia data — and the tightening is happening faster than most landlords predicted at the start of the year. For tenants who locked in leases during the post-pandemic glut of 2023 and 2024, that timing now looks prescient. For those who didn't, the window to negotiate is narrowing.

The shift matters because it arrives as investors retreat from Melbourne residential property following the Victorian budget's land-tax changes, and as AI data-centre demand starts absorbing industrial land in outer suburbs of Sydney and Brisbane. Canberra has so far avoided both pressures. Its commercial market is being driven by something more reliable: federal government lease renewals, a growing technology services sector clustered around the inner north, and a modest but real return of private-sector tenants who spent the past two years working from spare bedrooms.

Who Is Filling the Space

The action is concentrated along London Circuit and Northbourne Avenue, where B-grade stock that sat half-empty through 2024 is now commanding face rents of between $420 and $480 per square metre net annually — up roughly 8 percent on the same period last year. Sublease space, which flooded the market after Services Australia consolidated its footprint in 2023, has been largely absorbed. The Nishi building in NewActon, which blends commercial tenancies with residential and cultural uses, has reported full occupancy since March, with a waiting list for smaller suites below 200 square metres.

Technology and defence contractors are doing the heaviest lifting. Several firms with work tied to the AUKUS submarine program and the expanded Australian Signals Directorate campus in Brindabella Business Park have taken new or expanded tenancies in the first half of 2026. Brindabella, near Canberra Airport, has added approximately 4,200 square metres of committed leases since January, according to leasing agents familiar with the precinct. That precinct's proximity to the airport and its secure-facility infrastructure make it attractive in ways that inner-city coworking spaces cannot replicate.

Coworking operators are nonetheless doing well in the traditional CBD. Spaces on Mort Street in Braddon and around the Civic interchange have reported average desk utilisation rates above 78 percent through May and June, compared with roughly 60 percent for the same months in 2025. Small professional services firms — accountants, policy consultants, boutique legal practices — account for the majority of those bookings, and several have used flexible terms to test the market before committing to conventional leases.

The Data-Centre Wildcard

There is a complicating factor on the horizon. The same national conversation about AI data-centre demand that is pressuring industrial land in Sydney's outer west is beginning to reach Canberra. Two sites in the Hume industrial precinct and one near the Majura Parkway corridor have attracted feasibility assessments from infrastructure investors in the past six months, according to planning documents lodged with the ACT government. If those projects proceed, they will compete for the same electrical grid capacity that commercial buildings rely on — a constraint that could slow new office construction approvals and push tenants toward existing stock rather than speculative developments.

For businesses currently considering a move, the practical calculus is straightforward: the second half of 2026 is probably the last period in this cycle where landlords along the City Hill end of the CBD will offer meaningful rent-free incentives — typically six to nine months on a five-year deal right now — before tightening conditions allow them to walk away from those concessions entirely. Tenants in leases expiring before mid-2027 would be wise to start heads-of-agreement conversations now rather than after the September quarter data lands. The federal government's consolidation of several smaller agency footprints into the Constitution Avenue precinct, expected to complete by late 2026, will remove a significant block of sublease supply that has kept negotiating power with tenants. Once that space is off the market, the dynamic changes.