Israel said Tuesday that it had advanced plans to expand a Jewish district of Jerusalem in territory that was captured in the 1967 war and that the Palestinians claim as part of their future state. The move is likely to further complicate the Obama administration’s faltering efforts to restart peace talks.

The news that the building plans had moved closer to approval drew a sharp response from the White House, which has declared reviving the talks to be a major goal. Robert Gibbs, the press secretary, issued a statement saying the administration was “dismayed” and asking both parties to avoid unilateral actions that could “pre-empt, or appear to pre-empt, negotiations.”

Secretary of State Hillary Rodham Clinton recently generated a furor among Palestinians and other Arabs by praising as “unprecedented” an offer by Israel to slow down, but not stop, construction of Jewish settlements in the West Bank. Arab countries worried that the administration was backing off its previous insistence on a complete freeze, but Mrs. Clinton denied that, saying that she was offering “positive reinforcement” for policies that headed in that direction.

The Israeli move to push forward the building plans in Jerusalem comes as the Palestinians have begun seeking support for a plan to win the United Nations Security Council’s recognition of a Palestinian state, without Israel’s agreement, in the lands Israel won in 1967. Palestinian officials said they were pursuing the idea in an attempt to break the impasse in peace talks.

That initiative suffered a setback on Tuesday, just days after it surfaced. The Palestinians have called for European backing, but Carl Bildt, the foreign minister of Sweden, which holds the European Union presidency, told reporters in Brussels that a bid for international recognition of a state not yet formed would be “somewhat premature.”

The United States and Israel have already signaled their disapproval of the Palestinian initiative. A State Department spokesman, Ian C. Kelly, said Monday that the United States supported “a Palestinian state that arises as a result of a process between the two parties.”

Israel’s prime minister, Benjamin Netanyahu, has warned that a unilateral move by the Palestinians would “unravel” existing agreements and could lead Israel to respond with unilateral steps.

But the Palestinian president, Mahmoud Abbas, told reporters in Cairo on Tuesday that the proposal had the backing of Arab countries and that the deadlock in the peace process left the Palestinian leadership with no option but to try a different course.

“We feel we are in a very difficult situation,” Mr. Abbas said. “What is the solution for us? To remain suspended like this, not in peace? That is why I took this step.” Aides have said that Mr. Abbas, who said recently that he did not wish to run again for the Palestinian leadership, is dispirited by the lack of movement in the peace process.

Disagreements over settlement building are in large part the reason that the negotiations, which have been stalled for months, have not resumed. The Palestinians demand a complete freeze on settlement construction in the West Bank and the parts of Jerusalem taken over by Israel in 1967; the Israelis have rejected that.

Israel says it is willing to hold off new settlement projects for several months, but insists on allowing the completion of about 3,000 housing units already in various stages of planning and construction in the West Bank. It refuses to include Jerusalem in any freeze.

The 900 housing units that Israel said on Tuesday had moved closer toward approval are in addition to those homes. They are in Gilo, an area in southern Jerusalem considered by Israel to be a neighborhood of the city and by the Palestinians and much of the world to be a settlement that violates international law. Israel claims sovereignty over all of Jerusalem.

Saeb Erekat, the chief Palestinian negotiator, said the Palestinian Authority “strongly condemns” the decision to advance the construction in Gilo. The United Nations secretary general, Ban Ki-moon, said he “deplores” the decision.