Police "didn't have probable cause to search for whether she was there," Bremner said. "We don't have any restrictions."
The modest, two-story home is in a subdivision in Puyallup, Wash. Steve Powell lived there until September 2011 when police arrested him on suspicion of voyeurism. He was eventually convicted of 14 counts related to photographing young neighbor girls in various states of undress.
Steve Powell was released from prison earlier this year. Bremner also represents Steve Powell's victims, who obtained a $2 million judgment against him.
Last month, those victims used $100,000 credit from the judgment to obtain Steve Powell's home at an auction.
During Steve Powell's voyeurism trial, the mother of the girls became friends with Susan Powell's parents, Chuck and Judy Cox.
"Something the mom had promised Chuck was if she ever got the house through civil proceedings, Chuck could search it," Bremner said.
Susan Powell was last seen Dec. 6, 2009, at her home in West Valley City, Utah.