Roger William Eisinger Sr., 82, a Washington area builder and real estate developer for many years, died at Georgetown University Hospital Friday of cardiac arrest.

Mr. Eisinger originated the idea for the Bethesda Air Rights Building over the B&O railroad tracks on Wisconsin Avenue in Bethesda. The building was put up, and the development continues under the direction of Mr. Eisinger's son and namesake.

A native of Washington, Mr. Eisinger graduated from the old Central High School and earned a law degree at the old National Law School. He practiced law in the real estate department of a Washington bank, and then in 1926, took over the Eisinger Mill and Lumber Co., which had been founded in Bethesda by his father.

In the same year, he founded the Chevy Chase Federal Savings and loan Association, which merged with Perpetual Savings and Loan in the 1950s. Mr. Eisinger ran the lumber company and the savings and loan association until his retirement in 1954.

He was a member of the Explorers Club, and he and his wife, Marie Hall Eisinger, traveled widely. They were among the first tourists to visit Antarctica by cruise ship.

Mr. Eisinger also had been a founding member of the Potomac Yacht Club. He rowed single, double and eight oared sculls and had represented the club in competition.

In addition to his wife, of the home in Washington, survivors include three sons, Roger Williams Jr., of Potomac, Donald Lee, of Frederick, Md., and Richard Hall, of Annapolis; two daughters, Elizabeth de Guevara, of Caracas, Venezuela, and Margaret E. Logan, of Seattle; three brothers, John O., of Palm Beach, Fla., Constantine C., of Bethesda, and Walter G. Jr., of Washington; a sister, Octavia E. Webb, of Chevy Chase; 18 grandchildren, and one great-grandchild.