Isaac Pazornick, 57, a retired Washington real estate investor and general contractor, died Saturday at Walter Reed Army Hospital after a heart attack.

Mr. Pazornick was born in New York and lived in Baltimore before coming to Washington in 1951. He was a real estate salesman, broker, then investor until retiring from that business in the late 1960s.

Since that time he had operated a general contracting business in Washington until retiring for reasons of health in March 1980.

He served with the Navy in the Mediterranean during World War II. He had been a member of the Jewish War Veterans' Post No. 692 in Silver Spring.

Mr. Pazornick was a member of the Ohev Sholom Talmud Torah Congregation in Washington.

Survivors include his wife of 29 years, the former Doris L. Seidenberg, and four sons, Elliott Michael, Raymond Ira, David Stanley, and Robert Jay, all of Washington; another son, Herschel Martin, of Indianapolis; his father, Phillip, a sister, Charlotte Sherman, and a brother, Sol, all of Baltimore.

The family suggests that expressions of sympathy be in the form of contributions to the Boys Division of Yeshiva High School in Silver Spring, or to the Ohev Sholom Talmud Torah Congrogation in Washington.