How do you get into madd dogs mansion?

Answer 1

In the Los Santos mission, Madd Dogg's Rhymes, CJ will get to access the mansion on a job for OG Loc.

Eventually, in the mission A Home In The Hills, CJ will battle to take back the mansion, including the useful contents and its use as a safehouse.

Answer 2

CJ first gets to go into Madd Dogg's mansion with the mission for his friend Loc called "Madd Dogg's Rhymes" when CJ steals Dogg's lyrics book from his recording studio in the mansion by using stealth. He has to sneak in round the back, and the mansion becomes accessible.

Later, Dogg loses the mansion, because of his drinking and financial problems, to a Vagos drug baron called Big Poppa.

To regain control of Madd Dogg's mansion, CJ has to fly in from Las Venturas with some of the triad mob, in the mission A Home In The Hills. They have to parachute on to the roof of the mansion and kill off the Vagos gang protecting the outside, before moving in for a difficult battle with the rest of Big Poppa's men. As CJ only has a handful of triad guys left to help him, he often ends up on his own. If he manages to down all the Vagos gang, the final part of the mission is to chase Big Poppa, who runs outside into his car. CJ has to drive and catch Big Poppa and eliminate him (a hard job!). Once he has done this, the mansion belongs to CJ, and Mad Dogg can start recording inside his studios again.