The South Korean company on Thursday will break ground on the $300 million project with the planting of the first of 700 trees on the 26-acre site.
Opponents on the New Jersey and New York side of the river say the 143-foot-high building in Englewood Cliffs exceeds a 35-foot height limit on buildings and would ruin the natural beauty of Palisades Interstate Park.
A protest is planned at Thursday's groundbreaking, led by Larry Rockefeller, grandson of John D. Rockefeller, who donated 700 acres of land above the Palisades in the 1930's.
LG officials tell The Record (http://bit.ly/1aE8ZbD ) newspaper the structure will blend into its surroundings and boost the economy.
Opponents are appealing a judge's decision in favor of the project.