Home Improvement Star Charged With DUI and Drug Possession

We broke the story ... the 27-year-old was popped in L.A. County on Feb 1 when cops saw him behind the wheel of a Honda Accord that was parked in front of a fire hydrant. Once they investigated the situation, we're told Smith had a "strong odor" of cannabis.

If convicted on both misdemeanor counts, Smith faces up to a year and a half in jail and $1,500 in fines.