Te Kura o Kokohuia, in Matipo St, has 90 children. It is decile 1, and most of the children are Māori. The Castlecliff area is reinventing itself and the school's catchment is "a neglected area", Ms Haira said.
The facilities will make sport more attractive and improve health in the suburb.
"Our kids deserve the best. And people from the area will be able to come and play basketball outside of school time."
The school has already sold chocolate and had a kai evening to raise nearly $9000, and the board will contribute $10,000. Other businesses or sponsors will be welcomed.
Ms Haira has also made an application to another gaming trust, which could fund the rest of the project.
The New Zealand Community Trust gets money from gambling machines in six Whanganui venues: Caroline's Boatshed, Castlecliff Hotel, Shotz, Tandoori Spice Bar, Stellar Bar and the Red Lion Inn.