A plan for 272 new homes in West Bank settlements was approved on the eve of U.S Secretary of State John Kerry's departure Monday, Israel's Peace Now movement said.
Israel had been expected to announce new settlement plans alongside the release of Palestinian prisoners last week in a bid to ease the concerns of hardliners as it engages in US-brokered peace talks.
Peace Now said the construction of 250 homes at Ofra and 22 at Karnei Shomron was approved by the Israeli military administration charged with the settlements.
The anti-settlement group said in a statement "building could begin rapidly", noting that "a government seeking a two-state solution won't worsen the conflict by building in the settlements, especially those with no chance of remaining under Israeli sovereignty in the event of a peace deal with the Palestinians".
Kerry left Israel on Monday after his tenth trip to the region since last March, insisting progress had been made despite failing to reach a framework to guide Israeli-Palestinian peace talks.
Israel freed 26 long-serving Palestinians last week, the third of four tranches it plans to free in line with commitments made as part of the latest peace talks. The first two releases were accompanied by the announcement of new settlement construction plans in the occupied West Bank and annexed east Jerusalem.
Some 350,000 Jewish settlers live in West Bank settlements, in addition to another 200,000 Israelis settled in occupied and annexed east Jerusalem.
The international community considers the colonization of occupied land to be illegal, and the Palestinians have long viewed settlement construction as a key obstacle to reaching a peace agreement.