Per a 2018 Independent story, Fred Trump's first business venture was when he started adding garage extensions to houses as a teenager.
Fred Trump built his career as a real estate mogul in the mid-1900s through construction projects in Brooklyn and Queens and parts of Pennsylvania and Virginia during World War II.
His July 1999 New York Times obituary called him a "self-made man" who built "27,000 apartments and row houses in the neighborhoods of Coney Island, Bensonhurst, Sheepshead Bay, Flatbush, and Brighton Beach in Brooklyn and Flushing and Jamaica Estates in Queens."
In 1973, the Justice Department sued the Trump Management Corporation for "discrimination against [B]lacks in apartment rentals." Fred and Donald were both named as defendants on the suit. Donald Trump called the charges "absolutely ridiculous."
At the time of his death, his estate was estimated to be somewhere between $250 million and $300 million.
A 2018 NYT investigation found that President Trump has received over $400 million from his father's real estate empire, adding that "much of this money came to Mr. Trump because he helped his parents dodge taxes."
Responding to the Times investigation, the Trump family said, "All appropriate gift and estate tax returns were filed, and the required taxes were paid. Our father's estate was closed in 2001 by both the Internal Revenue Service and the New York State tax authorities, and our mother's estate was closed in 2004. Our family has no other comment on these matters that happened some 20 years ago, and would appreciate your respecting the privacy of our deceased parents, may God rest their souls."