Justin Bieber‘s Calabasas neighbors can finally breathe a sigh  of relief … because the Biebs is moving out —  after scoring a million  dollar profit from the new buyer … Khloe  Kardashian.

We broke the story … Bieber decided to move out of  Calabasas in January after numerous run-ins with neighbors and law enforcement  — where he felt trapped in his own home — and now he dumped it off on  Khloe.

Bieber bought the house in 2012 for just over $6 mil.  Real  estate sources tell TMZ … Khloe bought the home for $7.2  million.

As for Khloe … she sold  her Tarzana estate to “Big Bang Theory”  star Kaley Cuoco for $5.49 mil.

The move makes sense for  K.K. — her sister Kourtney recently  purchased the nearby home of Keyshawn  Johnson … who had his fair share of beef with J.B.

We’re  told Khloe will do some remodeling, because Justin’s 19-year-old taste doesn’t  suit her.

He’s all yours Atlanta!