Greenpeace has submitted plans to London's Islington Council to erect the turbines, complete with six-and-a-half foot long rotors, on the rear edge of its main office building.
It claims they will reduce carbon emissions by 6.4 tonnes per year and make the building, which is already solar powered, more energy efficient.
But neighbours are not convinced. Dave Jones, a local resident and retired printer, said the turbines were an eyesore. "There may be an old dear that lives next to it and that's part of her view," he said. "Can't they do this without putting raised obstructions above the profile of the original building?"
Checho Castrillon, who has lived in the area for 12 years, added: "Greenpeace is not engaged with local activities around here. It's just an office."
Islington Council and the local newspaper said residents had expressed concern about noise from the turbines and the lack of consultation by Greenpeace.
Simon Reddy, policy director of Greenpeace, said he wanted to reassure local people that the turbines would not create a noise nuisance and that their appearance would be in keeping with the affluent surroundings.
"We made every effort to go above and beyond the basic requirements of the planning guidelines, and we put a four-page information sheet through the doors of all of the neighbours," he said. "If we missed anyone, we're very sorry."