'Botched' Star Dr. Paul Nassif -- Gets a Nip/Tuck In The Housing Department

"Botched" star Dr. Paul Nassif is used to putting people under the knife, but now he's cutting about 15,000 square feet from his living space.

The former hubby of "Real Housewives of Beverly Hills" star Adrienne Maloof scooped up a $5M bachelor pad in Bel-Air. The new 4 bedroom/5 bath digs are pretty baller at 5,135 sq. ft. ... unless you compare it to his old crib.

He and Adrienne used to share a 20,000 sq. ft. palace, but Paul's a pro ... size doesn't matter.

As the good doc might put it -- it's no D-cup but it's plenty ample.