Tenders are expected to be called to remove Otumoetai Primary's historic original classroom from its site of 116 years.
Ross List, a member of the group that has campaigned for the classroom to remain on the school grounds, understood the Ministry of Education would be calling tenders to shift the building to another location.
The group, with more than 100 supporters, put together a package that would have freed the school from future financial liability for the building by creating a trust to restore and maintain the classroom.
But school principal Geoff Opie said the old building was classified as teaching space when it was no longer suitable to be used for classrooms and that compromised the school. It had been used by the after-school care programme which will be shifting across the road to the Otumoetai Baptist Church.
And even if the ministry had entered into a maintenance agreement with the group and the building was removed from the school's footprint for classrooms, the ministry would still have tied the Board of Trustees to take responsibility for the old classroom, and the board did not want that.