At a hearing last week Mr Justice Forbes granted a teenage resident the right to challenge the closure decision.
He said 15-year-old Miss T, who lives under council care at the Broadland Children's Home, had an 'arguable case' that Northamptonshire had ignored her right under the Children Act 1989 to be consulted about the decision, taken in February.
The judge described the case as 'a matter of some urgency', and ordered that it take priority for a full hearing on 15 May.
Miss T's counsel, John Friel, told the judge staff and children had been 'taken by surprise' by the closure decision.
The council had originally planned to close the two remaining homes in Northampton, but elected to close Broadlands instead when it was pointed out that it would be inappropriate to close both.