Mansions are home to some of the protagonists, antagonists and mob bosses throughout the GTA series. Mansions can usually be purchased after a major mission is completed in the game, while other mansions cannot be purchased.
In GTA III, the Columbian Cartel use a mansion called the Cartel Mansion, which is located in Cedar Grove, Shoreside Vale, Liberty City. The complex includes a pool, garden and a garage. It is also the largest building located within Cedar Grove. Towards the end of the game, it is used by Catalina as a base of operation. It is revealed in Grand Theft Auto: Liberty City Stories that in 1998, the mansion was owned by Donald Love, until he was blackmailed by the Cartel and finally leaved the city with the help of Toni Cipriani.
In Grand Theft Auto IV there are three large mansions in Westdyke, along Owl Creek Avenue. One of them is the residence of the world's richest family, the Von Crastenburg Family and the other one next door is home to the Paris Hilton-inspired celebrity Cloe Parker. The third one is home to Bryce Dawkins and his family.