A Wellington business representative group is urging Hutt City councillors not to commit to a new Petone stadium until it is known whether councils will amalgamate.
In February, plans were revealed for a stadium at the Petone Recreational Ground costing up to $50 million.
The Wellington Employers Chamber of Commerce says the Hutt City Council will decide on Tuesday whether to support the project, as part of Lower Hutt's draft annual plan.
The council's support could include a $25 million ratepayer contribution.
Chamber chief executive Raewyn Bleakley says the ongoing costs of the project would be about $350,000 a year.
She says the councillors should delay a decision until the Local Government Commission has made its determination on council amalgamation for the greater Wellington region later this year.
Ms Bleakley, who supports amalgamation, says the question needs to be asked as to whether the Petone stadium would benefit a super city.
"It needs to be put in to the considerations of a regional picture rather than just their area."