Hagit Ofran yesterday said the plans were adopted last week, and involve small settlements in the Ariel area in the northern West Bank, the Carmel settlement in the Hebron area and the Gush Etzion settlement bloc.
According to the NGO, the move marks the end of an informal construction freeze in the Palestinian territory that lasted 18 months.
Peace Now said on December 28 that Israel was working to revive and extend plans for new Jewish settler homes in the contentious area of the occupied West Bank known as E1.
E1 and the adjacent Maaleh Adumim settlement form an Israeli buffer east of Jerusalem that the Palestinians say would divide the West Bank and badly hurt the possibility of a contiguous Palestinian state.
"The area of Maale Adumim and E1 is one of the most sensitive areas in terms of the chances for two state solution," Peace Now wrote.
The United States, the United Nations and the European Union oppose all Israeli settlement building but have voiced particular concern about plans for E1.
In 2013, faced with international pressure, Israeli Prime Minister Benjamin Netanyahu vetoed construction of some 1,200 homes there but Peace Now said the housing ministry had hired architects to prepare fresh blueprints.
"This planning, which contradicts any possible commitment to a two-state solution, continues," said last month's Peace Now report, although it also added that the plans could be years from fruition.
US-backed peace talks between the Palestinians and Israel collapsed in April 2014 amid bitter mutual recriminations.
