'Million Dollar Listing' Star Josh Flagg -- This House Is Flippin' Awesome ... Watch Me Triple My Money

Josh Flagg ... star of "Million Dollar Listing Los Angeles" ... just dropped $5 mil on a Beverly Hills pad -- and now he's gonna gut the place in hopes of making a bundle.

Josh’s new pad has 4 beds, 6 baths and over 4,889 sq ft. It also has a 12-car motor court -- so it's pretty sweet as is, but Josh has big plans.

Our real estate sources say Flagg's gonna flip the place after a slew of changes, including:

• Expanding to 8,000 sq ft
• Expanding the pool to 100 ft
• Full interior overhaul
• Changing the exterior to a Nantucket/Hampton look

When it's all said and done ... Josh plans to sell it for $15 million, we're told.