It happened just after 5:30 p.m. at the building on 1000 Trinity Ave.
The child fell through a window gap where an air-conditioning unit was once located.
He was taken to Harlem Hospital where he is in stable condition.
No criminality is suspected at this time.
The investigation is ongoing.
RELATED | Woman shoved onto subway tracks during robbery in Manhattan
Woman shoved onto subway tracks during robbery in NYC
----------
* More Bronx news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube
Submit a News Tip