The Property Council is concerned that Christchurch City Council's draft plan for the central city restricts developers and will deter investment.
Public submissions on the draft plan, which sets out how the central city will be redeveloped and rebuilt, closed on Friday.
The Property Council says it supports the broad vision of trying to encourage residential and commercial development back into the central city.
However, chief executive Connal Townsend says much of what is in the detail of the plan is not grounded in commercial reality, and the city will struggle to attract investors.
"Worse than that, if in fact the plan was implemented as it's written, there's a real danger that it might drive investment out of the city, which is the last thing we want."
The city council will hold hearings on the submissions early next month and will deliver its final plan in late December.