Doors will "slam closed" on the aspirations of young people if a new waterfront AFL stadium isn't built, a parliamentary debate on the divisive project has been told.

Construction of a roofed stadium at Macquarie Point in Hobart is a condition of the Tasmania Devils entering the AFL and AFLW in 2028.

The $1.13 billion project requires the approval of both houses of state parliament to proceed, with debate under way in the lower house.

It is expected to pass the chamber on Thursday night with the support of the governing Liberals and Labor opposition.

However, it faces a far trickier passage in the upper house in December when a handful of independent MPs will decide its fate.

The stadium proposal was inviting Tasmania to be bold, ambitious and forward-looking, Minister for Macquarie P

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