Howard B. Dominick, 75, an architect who retired from the General Services Administration in 1962 after 35 years of government service, died Friday at the Newberry County Hospital in Newberry, S. C. He had pneumonia.

Mr. Dominick first came to Washington in 1927 and became an architect in the office of the supervising architect of the Treasury Department. These functions later were taken over by the GSA, the government's real estate and housekeeping agency. Mr. Dominick's job was to supervise the construction of government buildings and among those on which he worked are the buildings that comprise the Federal Triangle at Constitution and Pennsylvania Avenues, N.W.

At the time of his retirement, Mr. Dominick was chief of production services in the office of design and construction at the GSA.

Mr. Dominick was born in Newberry, S.C., and graduated from Clemson University. He later studied at the Fontainebleu School of Fine Arts in France. He worked for a private architectural firm in Columbia, S.C., before moving to Washington. He maintained homes in Washington and Hollywood, Md., before moving to Prosperity, S.C., in 1969.

Mr. Dominck was a member of the American Institute of Architects and was a 32nd degree Mason.

Survivors include his wife, the former Ethel Wannamaker, of the home in Prosperity; a daughter, Mrs. Plato Cacheris, of Alexandria; a son, Hayne B., of Troy, Mich., a brother, John B., also of Prosperity; a sister, Elizabeth D. Raskind, of Memphis, Tenn., and four grandchildren.