The local boards would control council budgets and decisions for local matters in established communities.
Hutt City Mayor Ray Wallace strongly opposed recommendations to turn Wellington into a super city. "I'm clearly disappointed that the Local Government Commission has not listened to the region.
"Sure there are some who would like to see a super city in Wellington, but the very vast majority do not want [it]."
Mr Wallace said the region was already working well together. "It's unfortunate that clearly the Local Government Commission does not understand how this region works."
Wellington Mayor Celia Wade-Brown said the proposal appeared to go against the wishes of those in the Hutt Valley and Wairarapa.
"The Wairarapa councils were very clear that they wanted to be a unitary [authority] on their side of the Rimutaka and this commission has not been able to fulfil that local desire," she said. "The draft proposal is for an uber-council from Miramar to Masterton and I have consistently said that is too far for one council."
The commission said a proposal for a standalone Wairarapa council failed to meet required tests.
The commission was not satisfied such a council would have the resources to carry out all local government functions in the future.
Commission chairman Basil Morrison said the shared decision-making model of a unitary authority with local boards was the best of several options considered.
"This proposal offers the greatest opportunity to address the significant future issues facing the region."
The deadline for public submissions is March 2.