Former mayors and councillors say a Wairarapa unitary authority would not be workable and more work is needed to find the right governance structure.
A report released by the Wellington Review Panel last week recommended Wairarapa councils become a 'local area council', which would fall under a Greater Wellington Council and be led by a lord mayor.
The review panel, Sir Geoffrey Palmer, Sue Driver, Sir Wira Gardiner and Bryan Jackson, was commissioned by Greater Wellington Regional Council and Porirua City Council earlier this year.
In response, Wairarapa mayors Adrienne Staples, Garry Daniell and Ron Mark said there were only two realistic options for the region - being part of the proposed Wellington structure or becoming a unitary authority.
A unitary authority would encompass the functions of both district and regional council.