Leaders of the project for a cross-communal Jewish primary in Finchley will discuss the plans with Department for Education officials this month.
Interim governors' chair Martin Blain said that, although the DfE interview did not "mean we have the green light", it demonstrated that the free school application was being taken seriously. "We need an almighty push to get through this final stage."
He pointed out that "any educational trusts [Jewish or other] which might be interested in becoming involved would be a welcome addition to our case".
To date, there have been 216 registrations of interest in the one-form entry school, 59 for places in 2013.
Matt Plen - the new Masorti chief executive and a member of the parents' steering group - said that a significant number were from families belonging to the New North London in Finchley and other Masorti congregations. "But we have been trying to reach out to all sections of the Jewish community."
Free schools can reserve only half their places for pupils from one faith and Mr Plen welcomed the challenge of establishing "a Jewish school that successfully integrates non-Jews".