The 24-year-old has put pen to paper on a three-year deal at County Ground.
Yorkshire-born, Hutton has spent his entire career to date at Trent Bridge, and was Notts’ leading wicket-taker as they pipped Northants to second place and promotion from the Specsavers County Championship Division Two.
He claimed an impressive 37 wickets in nine appearances for Notts in the four-day game, with six of them coming as his team lost to Northants at the County Ground last week.
Hutton made his Championship debut for Notts in 2013, and has gone on to make 33 first-class appearances for the county, claiming 106 wickets at 29.55
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With the bat, he has scored 970 runs at 21.55, with a highest score of 74.
He has only been used sparingly in white-ball cricket, playing just nine 50 overs games and one T20 match through his time in Nottingham.
Hutton said “I want to thank Notts for everything they’ve done for me.
“My time there has made me the cricketer I am now and I’m very grateful for that, but I’m really excited about the new opportunities and challenges playing for Northants will bring.”
Northants head coach David Ripley said: “We are delighted to welcome Brett to the club.
“I’ve been particularly impressed with his desire to improve and seek more opportunity away from what is obviously a very fine club in Notts.
“He will bring quality and competition to what is already a fine group of seam bowlers.”
A right-arm bowler and right-handed batsman, also Hutton represented England Under-19s in the 2012 World Cup in Australia where he took five wickets in four games.
He went on to play 17 matches during his time with the England U19s, taking 20 wickets in total.