Kim Kardashian and Kanye West have just bought an $11 MILLION MANSION!

Sources close to Kimye tell TMZ ... the future parents are now the proud owners of a 10,000-square-foot pad in an über-private, gated community in Bel Air, CA.

Kim and Kanye have owned the house for a few weeks ... and they've already gutted it and are designing a 14,000-square-foot dream home in its place.

The new home will be an Italian-style villa ... with a gym, movie theater, full hair and makeup salon, bowling alley, basketball court, indoor and outdoor pool ... oh and probably a baby nursery. Just a hunch.