Town said the council will be holding its breath and hoping for a minimum number of appeals to the plan.
Appeals of a geographic or policy nature could lead to administrative and complex challenges, he said.
Town said planning applications still in the works at the date the plan becomes operative will still be processed under old plans.
Asked how the council could build the infrastructure to meet the housing targets in the Unitary Plan and population growth, Town said the city was moving into an era with the crown and council working closer together to make sure infrastructure was there.
The city, growing at 3 per cent, was still in catch up mode and would not get on top of it without working with large developers, bankers, funders and central government, Town said.
A level of understanding had been reached between council and central government there are debt constraints, a desire to retain the council's AA credit rating.