The property, located behind Chateau Marmont in the Hollywood Hills, has four bedrooms and six bathrooms.
Lovato purchased the property in 2016.
Meanwhile, Selena Gomez has broken her silence over Lovato's battle with addiction, saying she had reached out to her in private.
"All I'm saying is, I reached out personally," Gomez said. "I didn't do a public thing. I didn't want to. I … I love her. I've known her since I was seven. So … it's … that's what I'll say."
Lovato publicly dissed her one-time BFF in 2014, saying she was sick of her "bulls**t".
"Swimming away from the bulls*** bye b****," she tweeted — and promptly deleted — in July last year.
She later confirmed on TV that she was fine with not being in Gomez's life anymore.
However, the pair is said to be closer again and that much of the drama between the two was due to Gomez's relationship with ex, Justin Bieber.\