Huddersfield chair Dean Hoyle said Anthony Pilkington's sale to Norwich "could easily prove the best in the club's history".
Hoyle accepted an undisclosed offer from Norwich for Pilkington on Wednesday and the 23-year-old, who joined Huddersfield from Stockport in January 2009, is poised to sign a three-year deal at Carrow Road.
Hoyle said: "As I stated earlier in the week, I always believe when opportunities come in life you have to take them and as such I do not begrudge Anthony, who is a great lad, this move to the Premier League.
"Pilks deserves his chance to perform on the biggest stage in English football and I'm proud of the small role the club has played in helping him develop his talent.
"We did not need to sell Anthony for financial reasons, but at the same time we did not want to stand in his way. We have secured the deal we wanted. It's a multi-million pound deal which could easily prove the best in the club's history."