On just five blocks of Madison Avenue, a multibillion-dollar development battle is brewing. 
Within a matter of months, Extell Development and Related Cos. have set in motion plans for ultra-luxury skyscrapers on the eastern corners of 60th and 59th streets. The developers are known to be aggressive, being responsible for shaping Billionaires’ Row and Hudson Yards, but their investments are just the start of the area’s rebirth.
“The Plaza District in general is in the midst of a $15B to $20B makeover when you total up all of the projects that are either recently completed, under development or proposed,” Eastdil Secured Managing Director Will Silverman said. “I think people have not…