Zoning restrictions are impeding an affordable housing proposal in Peterborough’s rural district, prompting town officials to re-examine the ordinance.

Howard Shafman, co-owner of local developer Shatos Realty, consulted with the planning board on Monday in hopes of building income-restricted duplex homes at 795 Dublin Road that he said could help address Peterborough’s affordable housing shortage.

Despite overwhelming support from board members, their hands are tied. Chair Carl Staley …