Kylie Jenner -- Kim & Kanye Can Party Next Door ... in My New $6 Mil Crib (PHOTO)

Kylie Jenner is getting the hell outta Dodge ... or at least Calabasas, but she'll still be within arms reach of her mom.

TMZ has learned the 18-year-old just snapped up a $6 million dollar home in Hidden Hills ... the same neighborhood Kris Jenner, and Kim Kardashian call home.

It's quite the upgrade ... she bought her last pad a year ago for $2.7 million. We're told there are already offers on Kylie's old pad, and it should go quickly for just under $3 mi.

Kylie's new crib is a Cape Cod stunner -- 6 bedrooms, 7 baths over 7,000 square feet. It's got a pool and wine cellar, plus a walk-in closet bigger than most master bedrooms. Key feature for chicks in her fam.