Dissatisfaction with them was highlighted in a community views survey last year.
The plan will be put in place with the help of Sport Whanganui, which will begin a development plan for Springvale Park.
It allows for council to contribute $200,000 (10 per cent) toward a hockey turf, $75,000 (20 per cent) toward football improvements at Wembley Park, $20,000 (20 per cent) toward an indoor cricket facility and $100,000 (20 per cent) toward netball facility improvements.
There is also a possible $50,000 (20 per cent) to create a River Activity Hub.
"I really like this model, of council partnering with the community and Sport Whanganui. We have only got limited resources and we can do a lot more if we work together," councillor Helen Craig said.
There has already been extensive consultation on the plan, and more submissions will be accepted until April 12.
Submissions can be made online at the council's website, or emailed to policysubmissions@whanganui.govt.nz. There are also paper copies of the plan and submission forms at four council venues.