After state politicians yesterday said they were satisfied Richard Rogers had no solid links to an anti-Israel group in London, the architect is set to get back to work on plans to make improvements to the Jacob K. Javits Center.

Lord Rogers last month allowed a group called Architects and Planners for Justice in Palestine, which has said it favors a boycott of Israel because of the construction of a security fence between Israel and the Palestinian territories, to use space at his office. Lord Rogers said he never had any knowledge of the group’s anti-Israel policies when he welcomed it into his office.

Over the last week, the Assembly speaker, Sheldon Silver, Rep. Anthony Weiner, and several Jewish groups have had meetings with Lord Rogers to clarify his relationship with the group, culminating with a lengthy summit yesterday morning. Several groups, including the Anti-Defamation League and the Conference of Presidents of Major Jewish Organizations, said they were satisfied with Lord Rogers’s explanation earlier in the week, and the New York politicians were appeased yesterday.

“I accept Mr. Rogers’s explanation for his involvement with the group,” Mr. Silver said. “I am also withdrawing my opposition to letting him be the lead architect” on the Javits project.

The head of the Empire State Development Corporation, Charles Gargano, said in a statement that he was gratified with the development.

“I spoke with Lord Rogers a short time ago and told him, ‘Now it’s time to get back to work.'”

Lord Rogers said he allowed the group, which was then called Architects and Planners for Justice in Israel and Palestine, to use his office on one occasion. He said he gave “abstract” opening remarks about helping rebuild devastated areas before leaving for another meeting after 10 minutes. In the following days he underwent surgery and missed the press coverage of the group while he was recovering in the hospital. News reports at the time mentioned the boycott.

Calling the Palestinian territories a “terror state,” he said he has always been an ardent supporter of Israel.

“I have always been a strong believer in that state,” Lord Rogers said at a press conference. He admitted he had made a mistake in not following the early press reports of the group and not taking a stronger public stand against its support of a boycott right away.

The preliminary $1.7 billion plans to improve the Javits Center, which is named after a Republican senator who was a strong campaigner for Israel, include doubling the exhibition space and adding paths lined with trees. A special flat tax of $1.50 is being levied at hotels across the city to finance the project.