Manhattanites are rallying to chop the tops off so-called supertall skyscrapers.

A court last week ruled that SJP Properties and Mitsui Fudosan must demolish the top 20 floors of their skyscraper at 200 Amsterdam Avenue (pictured top) after Supreme Court Justice W. Franc Perry found they had flouted zoning regulations.

Now, activists are looking to apply the same rules to a second supertall at 430 East 58th Street.

“This groundbreaking decision averts a dangerous precedent that would have ultimately affected every corner of the city,” said Elizabeth Goldstein, president of the Municipal Art Society of New York (MAS) which led the case against the 200 Amsterdam developers.