I just saw this while reading the morning news: JPMorgan Plans New Manhattan Headquarters for 15,000 Workers. Source: Bloomberg.
The new building could be as much as 500 feet taller than the current building 270 Park Ave, which is 707 feet (215m). That would yield a 1200 footer!
Excerpt...
Group Five Headquarters
Group Five Headquarters at the Waterfall Business Estate comprises of approximately 20 650m² of bulk, spread over 4 floors of office space.
Group Five will house all their business units into this new facility. The space is arranged in 5 main wings that are linked by a...