Offset got Cardi B a pretty insane gift for her 29th birthday...a house!
Offset revealed Cardi's bday present in the middle of her star-studded party Monday night at L.A. River Studios -- he bought her a house ... with a damn pool on the roof.
The Migos rapper got on the mic and unveiled his gift with a video presentation, saying he wanted to get her something extra special after the big year they just had ... including the birth of their son last month.
It sounds like Cardi's new crib is in the Dominican Republic -- her family's homeland -- and it looks like Offset found a nice, secluded spot surrounded by palm trees.
Check out the video below!