Once you land onto your mansion , it will tell you to press E to enter inside, still puts the player in danger if he's pursued by other players or cops. You can use your weapons but nowhere to hide.
So as i recently discovered on the mansion dlc, if you parachute onto your rooftop, you're basically trapped outside with no way of getting in. Unless you land outside the gate to trigger the cutscene. Same goes for the helicopter, no landing cutscene you're trapped outside.