Based primarily in California’s upscale Hidden Hills and Calabasas neighborhoods, the crew—reportedly collectively worth an estimated $2 billion, per Forbes—has built quite the real estate empire. In over a decade, they have bought and sold several over-the-top mansions, many of which Architectural Digesthad the chance to tour. And while the beloved reality show is drawing to a close, the Kardashian-Jenner family is continuing to add to their impressive, ever-growing collection, most recently with Kourtney’s La Quinta purchase.