Chadwick, who played under Grant and Alan Pardew at West Ham, has been a regular in Tony Pulis' side this season, featuring in the recent 5-0 drubbing of the Canaries, but is now completing a medical before completing a deal until January 3rd.
Nigel Worthington has previously tried to sign Chadwick, eventually buying Lee Croft for the right midfield role. Chadwick has now stated that he was devastated at the break-down of the summer move, but delighted to be joining now.