A £250,000 refurbishment programme is under way at Manchester's Broughton Jewish Primary.
Funded by a local authority grant, the project will provide tutor rooms and a remodelled reception area and administrative offices.
The building work - due to be completed in January - reflects a growing pupil population. "The number of students increases every year," governor Leonard Seitler said.
With top academic results and a high level of Jewish content in its curriculum, Broughton Jewish attracts a mix of mainstream and strictly Orthodox pupils.
Next summer, a second phase of development will add a crèche, extra classrooms and a new school hall. Around half the funding for stage two is already secured, partly through bequests.