The sports complex took about two years to complete.
Sir John, MP George Hawkins, city councillor Arthur Anae, and other guests were welcomed with a haka and the national anthem, sung by the students.
The school is one of 23 to benefit from Sir John Walker's Find Your Field of Dreams Primary Sport initiative in the area.
This costs around $250,000 a year, and reaches about 3500 school pupils.
The organisation will help provide the school with resources for coaching and implementing sports programmes inside and outside school hours.
Additional funding for the sports hall came from community fundraising and the Ministry of Education.
Redoubt North principal Jane Milner said the complex would have an emphasis on character building.
"This will be an outstanding learning environment for the children of this community. Today is the culmination and celebration of nearly two years of hard work."