Tenders are being advertised to build a third ''teaching space'' in the wedge-shaped ''void'' on the first floor to the south of the crescent teaching block.
The 23rd and largest classroom in the Frankton school should serve up to 30 pupils by the start of term 4.
The previous ministry attempt to ease pressure on the school was the relocation of a double classroom from Queenstown Primary to Remarkables Primary earlier this year.
''These three extra teaching spaces will provide for the anticipated end-of-year roll increase,'' a ministry spokeswoman said.
What has become known as Taumata Pod, for year 3 pupils, was retrofitted to meet Queenstown Airport and Queenstown Lakes District Council standards. Newly re-elected board of trustees chairwoman Fiona Woodham said the school was no longer set up for 460 pupils.
''With the two new classrooms that are now in place, and bearing in mind the ministry's 'allocation' of 30 students per classroom, we currently have accommodation for up to 520 students,'' she said.
''With the new void space to be added towards the end of this year, we will then have accommodation for around 550 students.
''It is with this projected figure in mind that we have decided to advertise for out-of-zone placements to help ensure stability of the roll - and therefore the staffing that comes with it - before the start of next year.
''We want to be in a position to plan our staffing and attract the very best applicants to our school.''
The first ministry attempt to solve potential overcrowding was to call on the school's board of trustees to reduce the enrolment zone last year, a move which shut out many young families.
''A transitional agreement to ensure current families could continue to enrol siblings was included as part of the reduction, which meant the reduced scheme would take longer to take effect,'' the ministry spokeswoman said.
''The additional classrooms have therefore been provided to manage the roll growth until the reduction takes full effect.''
Asked at what stage the proposed primary school in Shotover Country was in terms of development and the establishment of its enrolment zone, the spokeswoman said the ministry consulted other Wakatipu schools about the proposed new school.
''We will report back to the Minister of Education who will then make a decision around the establishment of the school,'' she said.
Nominations for the establishment board of trustees have been sought from the community.
''If the new school is established, and the establishment board appointed, one of the tasks of the board will be to consult with other schools and work with the ministry to implement an enrolment scheme,'' she said.
