Mr Goff told the Herald: "This is a stuff up and it needs to be repaired."
Dr Smith said the issue only arises as a problem in the event that the developers in those special housing areas do not have their applications for plan changes and qualifying developments in before the 16th of September and the hearings panel(for the Unitary Plan) decides that these areas not be residential.
He said the issue will not become clear until the hearings panel makes its recommendations to the council in July.
"I'm encouraging all of the developers to move forward as quickly as possible with their applications.
"It would be unusual for the hearings panel to not support an area being residential when both the council and the Government have approved it to be just that," he said.
The Government, Dr Smith said, was open-minded about legislation to effectively extend the Special Housing Area legislation but would not make a decision until it had seen the plan recommended by the hearings panel and the council's response.
"We do not want to have any legislative barriers to seeing as much residential housing proceed as quickly as possible," Dr Smith said.