Port Ahuriri School announced a $3 million refurbishment during its 150th anniversary celebrations at the weekend.
More than 250 people gathered at Port Ahuriri School on Saturday for an official opening, school tour, memorabilia display and picnic.
Principal Glenn France said he announced plans for a $3m Ministry of Education refurbishment of the school during his speech at the official opening.
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He showed past pupils the plans and drawings for the "exciting" project, which is due to begin in May next year.