"He has approved accommodation with his family well away from the place of his crime, but clearly, because he is to go to a dependency treatment unit programme this week, he is not ready for release," Judge Mike Behrens QC, said in the parole report, released today to NZME.
Windley has a low security classification in prison and has undertaken a "medium intensity rehabilitation programme", however, in October and March he had two "misconducts".
"Last week he was caught with a cell phone and is facing court.... in respect of that offence," the parole report says.
Windley has also undertaken other prison programmes and works as a jail recycler and sorter.
Last week Mr Valentine's step-father John Timmer-Arends told NZME he and wife Lynda were relieved with the board's decision.
"Lynda said it's so cruel that as a mother she had to re-live this only 15 months after the trial. It's unbelievable. This guy's killed someone and we're talking [parole] 15 months after the trial," Mr Timmer-Arends said.
"It's pretty draining but it was a good result. It's the first time in this whole process that something's gone right."