Bloomberg's main home is a five-story townhouse on Manhattan's ritzy Upper East Side, which he bought in 1986 for $3.5 million. At the end of his last term as mayor, the billionaire spent at least $1.7 million renovating the home. Zillow estimates its value at $17.7 million.
Bloomberg bought up units in the neighboring brownstone and tore down walls to combine the spaces with his primary home, The New York Times reported in 2009.
The former New York City mayor also owns a fifth-floor condo at 610 Park Avenue, a Trump Organization development, which he bought in 2000 for $3.8 million, Will Bredderman reported for Crain's.