Our Hobart project got its building approval on 20 May 2026, while NCC 2025 was briefly in force in Tasmania. Which edition applies to our project now?

Your approval sits in a five-week window with no clean answer written into the legislation, and the honest advice is to get your project's status confirmed in writing rather than assume either way.

The facts of the window: NCC 2025 became operative in Tasmania on 1 May 2026. [1] The Building Amendment Act 2026 (Act 6 of 2026) then reinstated NCC 2022 Amendment 2 from 5 June 2026, keeping it in force until 30 April 2027, with the latest edition applying from 1 May 2027. [2]

The problem for your 20 May approval: the reinstating Act contains no savings or transitional clause for approvals granted while NCC 2025 was operative. The legislation simply does not say whether your approval is preserved under NCC 2025 or is now read against NCC 2022. That cohort of approvals is being handled administratively by CBOS. [2]

What that means in practice:

• Do not assume the reversion retrospectively converts your approval to NCC 2022.
• Do not assume it preserves NCC 2025 either.
• Contact CBOS and confirm in writing which edition your approval is taken to have been granted under, before documentation or construction decisions that differ between the editions.
• Involve your building surveyor, who holds the approval record and will be the contact point for any administrative determination.

The practical exposure is small for provisions that are identical across the two editions, but where the editions differ on something material to your project, the edition question decides compliance, and only a written confirmation protects you.