Prime Minister Jacinda Ardern will officially open the block at a ceremony on April 5 as part of her lower South Island visit, which will also include Queenstown and Wanaka.
Waitaki Boys’ High School rector Darryl Paterson said confirmation that Ms Ardern would unveil a plaque dedicated to the largest capital development at the school in more than 20 years was "great news".
"When thinking about how it should be opened, I flippantly said to the planning manager, ‘Why don’t we get the Prime Minister down here’. We got in touch with Zelie Allan [Labour candidate for Waitaki] ... she got back to me quite quickly and said, ‘April 5’."
Mr Paterson said the project was 15, if not 20, years in the making and would be of huge benefit to the school’s pupils.
A Labour Party spokesman said Ms Ardern was looking forward to spending some time in Oamaru. He has previously said the way the town had embraced its heritage and preserved its history was "phenomenal".
It has not been confirmed if Ms Ardern will add to her Oamaru itinerary.
