His former home is being sold to the family of two girls who were the victims of Powell's voyeurism, and the search will be coordinated between that family and Susan Powell's parents, Judy and Chuck Cox, said their attorney Anne Bremner.
Susan Powell's husband, Josh Powell, has long been suspected of involvement in her disappearance and afterward went to live at the home of his father Steven Powell, who had an obsession with Susan Powell. Josh later killed himself and his two young sons in a fiery explosion at another home where he went to live.
Bremner said no date has been set for the search, but the Coxes want to do it soon. It's believed that many of Steven Powell's belongings are still inside the house, but have not been claimed by him.
"It's what any parent would do, with having a missing child, and they don't know if Susan is alive or dead. Chuck wants to satisfy himself about what is actually there or not there," Bremner said.
Police have earlier searched the home, looking for Susan Powell's journals, and inadvertently found evidence that Steven Powell was illegally videotaping two young girls using the bathroom at the home of the neighbor who is now buying the property.
But Bremner said it isn't known whether police ever searched the property for evidence that Susan's remains might be there. She added that there have been tips in the past from people who said she had been seen at Steven Powell's home.
The home also will be searched for other types of evidence that might shed some light on Susan Powell's fate, Bremner said, such as documents and records that might not have been covered by the search warrant obtained by police.
"From what we know of the search that happened years ago, where they found the voyeuristic materials, they didn't 'carte blanche' search the house for evidence of other types of things, as far as we know," Bremner said.
Bremner said it's impossible to say whether the search is a long shot.
"There have been years of hope, and there have been years of dashed hopes, but for my clients - they still have hope until they find (Susan), and they don't know if she's alive or dead. So they will always have hope of some information, of finding their daughter, of knowing where she is."