A proposal by U2 guitarist The Edge to construct five mansions overlooking Malibu was rejected Thursday by the California Coastal Commission.

Despite pledges by The Edge, whose real name is David Evans, that the project would be environmentally-friendly, the commission ruled 8-4 against the development, citing concerns over habitat, water quality and views, the Los Angeles Times reported.

"In 38 years of this commission's existence, this is one of the three worst projects that I've seen in terms of environmental devastation," the agency's executive director Peter Douglas said.

"It's a contradiction in terms -- you can't be serious about being an environmentalist and pick this location," Douglas said, adding that he expected Evans to take the matter to court.

PHOTOS: The Edge's Mansion Plans.

Commission reports have already twice recommended against the development which Evans has been fighting for since 2006. Opponents of the project say it would scar the ridgeline in the hills above Malibu.