Donald Lewis Brown, 58, president of the Aldon Construction Co. and vice president of the Aldon Management Corp., died Friday at George Washington University Hospital after a heart attack.

He and his brother, Alvin I. Brown, founded the companies in Washington in 1937 and expanded them into a national operations. They built both homes and commercial buildings.

They constructed the Bethesda Medical Building at 8218 Wisconsin Ave., Bethesda, and built and managed numerous apartment houses, including 8200 Wisconsin Avenue, Bethesda and the Jocelyn and the Brittany on Connecticut Avenue in Washington.

Mr. Brown was born in Philadelphia. He served in the Coast Guard in World War II.

He was a member of the Home Builders Association here, the Washington Hebrew Congregation and the Woodmont Country Club.

For the last seven years, he had divided his time between his home in Washington and a working far, "Den of Wolves," in Thurmont, Md.

In addition to his brother, of Washington, he is survived by his wife, Doreen L. Brown, and two daughters, Claudia and Nicole Brown, all of the homes; a son, James N. Dulca, of Washington, and a sister, Fay Gruber, of Washington.

The family suggests that expressions of sympathy may be in the form of contributions to the Donald Brown Fund at George Washington University Medical Center.