Deputy Secretary of State John C. Whitehead will meet with congressional leaders today to answer questions about a report that the administration has decided to rebuild the top five stories of the new, electronic bug-ridden U.S. Embassy building in Moscow, congressional sources said yesterday.

Administration spokesmen sought to quell congressional concern that the administration already has made the decision without consulting Congress and reached an agreement with the Soviet Union allowing for "deconstruction" of the five floors.

"No decision has been made," State Department spokeswoman Phyllis Oakley said yesterday.

"The administration is continuing its discussions internally. We're consulting with Congress as we seek the best means of assuring a safe and secure environment in which to conduct our diplomatic business in the Soviet Union," she said.

White House spokesman Marlin Fitzwater said a report in yesterday's New York Times that the administration has all but formally reached a decision to rebuild only the top five floors of the main eight-story embassy office building at an estimated cost of $92 million was "a little premature" but reflected general administration thinking on the matter.

The report also said the administration has abandoned a proposal to build a separate annex containing the embassy's communications equipment to ensure its security.

Rep. William S. Broomfield (R-Mich.), ranking member of the House Foreign Affairs Committee, said he was "troubled" by the report. "I thought we had their {the administration's} word they would not make a decision until Congress was consulted," he said. "We don't need this kind of confrontation."

A Broomfield aide said there was concern that Secretary of State George P. Shultz and Soviet Foreign Minister Eduard Shevardnadze had arranged some kind of "done deal" in their meetings last week that would allow the United States to rebuild part of the new U.S. Embassy chancery, the main office building.

In return, Shultz would have tacitly agreed not to open the question of expelling the Soviets from their Mount Alto embassy compound in Washington, as a number of congressmen have demanded, and not to demand that American diplomats and U.S. facilities located in Moscow be treated generally the same way Soviet diplomats and buildings here are treated.

A State Department official denied that the two foreign ministers had arrived at any such "done deal." The official said that Shultz, in his talks with Shevardnadze, had only stressed that the United States needed, and expected, Soviet cooperation in reconstructing a secure embassy in Moscow. "No agreement was reached nor details discussed," the official said.

"Shultz said the United States will be coming back to them," the official added.

Whitehead is expected to meet today with House leaders, including the chairman and ranking Republican members of the House Foreign Affairs and Intelligence committees and the foreign operations subcommittee of the Appropriations Committee.

The Broomfield aide said the lawmakers wanted to know what "understandings," if any, Shultz had reached with Shevardnadze and what the administration finally has decided to do about security at the Moscow chancery building. U.S. experts have found virtually the entire building to be riddled with listening devices the Soviets secretly installed in pillars, walls and floors.

The aide said it appeared the entire building could be torn down and rebuilt for $10 million to $15 million more than the reported $92 million it will cost to rebuild the top five floors.