The 40-year-old is normally based in Las Vegas, where he lives in his extraordinary 'Big Boy Mansion'. He also owns a massive property in Miami which cost a reported NZ$10.5million.
Now, in the neighbourhood famous for the glitz and glamour of its A-list residents, Mayweather is enjoying a life of luxury in the 15,096 square-foot, six bedroom house next to the famous Beverly Hills Hotel.
'Money' showed off his extensive glass-faced wine cellar as well as his remarkable array of jewel-encrusted watches.
"Relaxing in 90210," Mayweather wrote alongside a photo of him inside the mansion, that includes a sculptural staircase with an LED-lit banister, a living room with 10 sets floor-to-ceiling French doors and an ebony-panelled library.
Videos posted on the former fighter's Instagram showed Mayweather in a vast room surrounded by a marble fireplace and impressive chandeliers.
After flirting with retirement on a number of occasions in the past, the 40-year-old claimed he will give up the game for good after beating McGregor at the T-Mobile Arena.