17 year old Kylie Jenner buys $2.7million home (see photos)

Is she even old enough to own a home, let alone live by herself? TMZ reports exclusively below...

Sources tell TMZ, Kylie has inked a deal to buy this 4,900 square foot house in The Oaks, an exclusive gated community in Calabasas. The house - which is a block from Kourtney and Khloe -- has a sick home theater, a pool, 5 bedrooms, an awesome kitchen, and on and on.

Kylie has made a lot of money on KUWTK. To give you an idea, we're told Scott Disick banks $4 million a season, so she's got the cash. We're told Kris Jenner is "helping her" with the purchase, but we're told it's Kylie loot."