The left-back found it hard to break into the Boro first team in his four years at the club, since joining from Doncaster in 2013.
At 23 years old, Husband spent much of his playing time on loan for Fulham and Huddersfield Town where he played 110 matches.
He joins Championship rivals Norwich City on a three-year deal and will be flying to Germany for their pre-season training camp this weekend.
Speaking about the move, Husband said that “it didn’t start off well last season,” speaking about his shoulder injury picked up in pre-season last summer.
“I got injured at the start of the year and was basically playing catch-up for the rest of the year.”
“It didn’t go to plan for me and I didn’t play as much football as I wanted.”
Norwich City boss Daniel Farke said “James is quick, he’s technically good and knows how to defend.”
“There are some things he needs to improve but he’s young and his attitude and character are excellent.”
"He's a young guy with lots of potential, but he also already has strong experience of playing in the Championship."