Retired Army Col. Arthur E. Allen, 80, an architect who had designed both military and civilian buildings, died of pneumonia Monday at Shibley Memorial Hospital. He had a heart ailment.

In World War II, Col. Allen supervised the design for tens of thousands of Army barracks and other buildings erected throughout the world. He also supervised construction specifications for the Pentagon.

After graduating from the Army Industrial College, he became an inspector general and traveled throughout this country, the China-Burma-India area and the Pacific Theater inspecting construction activities. He also was on special missions to heads of state in South America.

Col. Allen left active duty at the end of the war but remained in the Army Reserves until 1960.

He established a practice here as a consulting architect for Wire Properties and other construction firms and maintained the practice until 10 years ago. He designed many of Washington's apartment buildings and small shopping centers.

Col. Allen was born in Brooklyn, N.Y. He served with the Marine Corps in World War I. He then graduated from Pratt Institute and practiced architcture on Long Island, N.Y. He was cited by Fortune magazine for his design of small houses.

In 1939, he was commissioned a major in the Army Corps of Engineers and came to Washington. He had maintained a home here since then.

Col. Allen was architect emeritus ofthe American Institute of Architects. He was a member of the Congressional Country Club, the National Sojourners, and Heroes of '76 and was active in Alcoholics Anonymous.

He is survived by his wife of 51 years the former Dorothy Bogart of Washington; a daughter, Barbara AllenTroutman of Bethesda; a son, Bruce Arthur, of Fairfax; a brother and two sisters, of the New York area, and four grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Children's Hospital National Medical Center.