The injuries to the firefighters was described as "non-life-threatening" by Fire Commissioner Daniel Nigro.
"It was a very hard fire, as you can imagine", Mr Nigro said outside the building in midtown Manhattan.
Unfortunately, a resident in an apartment on the 50th floor was rushed to a nearby hospital where he was pronounced dead.
Todd Brassner purchased the high-rise flat in 1996, based on land records. An investigation is ongoing.
Water pours from the window of a fire damaged apartment in Trump Tower Saturday, April 7, 2018, in NY. Very confined (well built building).
Trump's then-under construction Trump World Tower near the United Nations was also grandfathered in because he had submitted building permits before the local law was signed.
Asked if that assessment was accurate, Nigro said, "It's a well built building. The upper floors, the residence floors, are not sprinklered".More news: Zuma defiant as South African corruption case starts
Trump called city officials like famed Queens politician Archie Spigner, whose council committee compiled the bill, to argue that sprinklers were too expensive - at $4 per square foot - to install throughout an entire building, the New York Times reported at the time.
Donald Trump pushed to block a requirement for fire sprinklers in city high-rises in the late 1990s.
Officals confirmed that no members of the Trump family were in the building at the time of the disaster. The Trump Organization, which owns the 263-unit condo and office building at 721-725 Fifth Avenue, houses their headquarters on the 26th floor.
Nigro said firefighters and Secret Service members checked on the condition of Trump's apartment. Six firefighters were injured, none seriously, before the blaze was put out. "Instead they received an automatic notification that there was a fire inside".