Leon Bangura, 20, Adam Dugdale, 55, and Carrie-Anne Hall, 51, have all been charged with the crime.
It comes after Kalvin Taylor was discovered dead in a ground-floor flat in Lefroy Road, Mile Cross, on September 21.
Kalvin Taylor (Image: Norfolk Constabulary) Mr Taylor, from London, is thought to have been dead for nearly a week before he was found. He had suffered a single stab wound on September 15.
Bangura, from London, Dugdale, of Shorncliffe Avenue in Norwich, and Hall, of Lodge Breck also in Norwich,........