A skate park and synthetic playing surfaces are included in improvements that will be made to sporting precincts at Rockdale and Brighton-Le-Sands.
The state government will fund works costing $20 million as part of the M6 (F6) stage one motorway project.
The improvements will take place adjacent to the PCYC building in Ador Park Precinct and McCarthy Reserve at Rockdale and the Brighton Memorial Playing Fields at Brighton-Le-Sands.
Transport for NSW said construction was expected to begin in mid-2020 and be completed in late-2021.
Ador Park Precinct and McCarthy Reserve will have an upgraded full-sized synthetic field, new mid-size grass field, inclusive playground, BBQs and skate park
A new amenities building will include change rooms, canteen and public toilets.
New and upgraded lighting will be provided, along with tree planting and landscaping, a pedestrian and cyclist path and a pedestrian bridge over Muddy Creek
West Botany Street Bridge will be upgraded to include a shared pedestrian and cycle path, the car park will be relocated, with an increase in spaces and the vehicle access point will also be changed.
Brighton Memorial Playing Fields will be improved with an upgraded full size synthetic field, new mid-sized grass fields, play area, memorial garden and lawn areas.
A new amenities building will include change rooms, canteen and public toilets.
The car park will be upgraded, with increased capacity and new and upgraded lighting will be provided. Access from Sybil Lane will be improved.
Draft sports precinct plans were released for community comment late last year.