7. Cornell Tech Campus
Estimated Cost: $2 Billion
We are continuing our list of biggest construction projects in NYC with Cornell University that is completely transforming Roosevelt Island with the construction of its new tech campus. The campus will be a home for students, academics, faculty and staff and tech companies. It is being built in phases and the first, a state-of-the-art dormitory will open this year. The 26-story building will be the largest, energy-efficient dorm in the world at a cost of $115 million.