W. Anderson (Andy) Barnes, executive director of the Pennsylvania Avenue Development Corp. since 1977, has resigned to enter the private real estate development field in California, a corporation spokesman said yesterday.

Barnes, 37, submitted his resignation recently to Max N. Berry, chairman of the government-sponsored redevelopment corporation, who accepted it reluctantly, according to Tom Regan, the corporation's operations director. The PADC board on Wednesday adopted a resolution commending Barnes for his service.

The second executive director in the corporation's nine-year history, Barnes took over after plans for the project were substantially completed and work was finally getting under way, replacing John Woodbridge who is now an architect in San Francisco. Western Plaza and Pershing Park, located on opposite sides of 14th Street on Pennsylvania Avenue, were developed under Barnes' general direction.

A native of Rhode Island who was educated at Yale and Harvard, Barnes came to PADC from the Rouse Co., a real estate development firm in Columbia, Md., where he still lives.

Regan said the PADC board will soon start a search for a new executive director. The post pays $50,112 a year, the maximum salary now permitted for career civil servants. PADC Director Barnes Resigns For Private Post

W. Anderson (Andy) Barnes, executive director of the Pennsylvania Avenue Development Corp. since 1977, has resigned to enter the private real estate development field in California, a corporation spokesman said yesterday.

Barnes, 37, submitted his resignation recently to Max N. Berry, chairman of the government-sponsored redevelopment corporation, who accepted it reluctantly, according to Tom Regan, the corporation's operations director. The PADC board on Wednesday adopted a resolution commending Barnes for his service.

The second executive director in the corporation's nine-year history, Barnes took over after plans for the project were substantially completed and work was finally getting under way, replacing John Woodbridge who is now an architect in San Francisco. Western Plaza and Pershing Park, located on opposite sides of 14th Street on Pennsylvania Avenue, were developed under Barnes' general direction.

A native of Rhode Island who was educated at Yale and Harvard, Barnes came to PADC from the Rouse Co., a real estate development firm in Columbia, Md., where he still lives.

Regan said the PADC board will soon start a search for a new executive director. The post pays $50,112 a year, the maximum salary now permitted for career civil servants.