Michael Jordan -- I'm Building a $12.4 Million Cigar-Smoking MANSION

Consider the world record for "largest humidor ever" broken -- Michael Jordan's $12.4 MILLION Jupiter, FL palace is juuust about ready to move in to ... and it features an insane cigar-friendly home theater.

His Airness -- rarely seen these days without a tightly-rolled Cuban between his teeth -- has been building the 28,000 square foot estate for the past three years, complete with a giant state-of-the-art home theater ... outfitted with special equipment made to handle mass amounts of cigar smoke.

The 3-acre, 11-bedroom compound is being built in the middle of an ultra-exclusive golf course community called the Jack Nicklaus' Bear Club ... where Tiger Woods also lives.

It's unclear where Jordan plans to display his 5 MVP trophies and 6 NBA Championship rings ... but between the main house, the pool house, the guest house, and the 2-story guard house ... he's got plenty of choices.

FYI -- There's also a ridiculous athletic facility ... complete with b-ball court, naturally.