An assessment team would then write a report about the suitability of the address and its occupants. A judge would then have the final say.
The judge noted there were no mental health reports on file.
Given the seriousness of the allegations against the girl, he said such an evaluation was "essential''.
The report - ordered under the Oranga Tamariki Act - would look at whether the defendant was fit to stand trial and would give guidance on the type or duration of any order the court might make.
Because the teenager might end up on bail in the South, Judge Flatley said a professional from the area should be sent to complete the assessment.
Oranga Tamariki said that would require financial approval from management.
Restrictions around Youth Court reporting mean no details that could lead to the identity of the defendant can be published.