Mayor Glenn Docherty this week officially opened the new facilities in front of club members.
The expansion includes a new junior and senior soccer pitch and a floodlit oval for football and cricket, coaches' boxes, an additional 98 car parks, landscaping and footpaths.
Mayor Docherty said it was exciting to see the centre nearing completion.
"Council's long-term investment in the Angle Vale region for sport sees the facility continue to grow. This is a major benefit to residents in this part of Playford," Mayor Docherty said.
"It is one of our city's most popular venues for sports people and supporters.
"The latest upgrade further underlines Council's commitment to creating more opportunities for local sports people of all ages.
"This upgrade is a win for more than 1230 football, soccer, cricket and netball players. Designs for the BMX track will begin soon."
The latest stage has been funded by $4.5 million from the City of Playford and a $590,000 grant from the State Government through the Grassroots Football, Cricket and Netball and Facility Program.
The work builds on previous improvements, including new clubrooms, netball courts, cricket nets, a playground and female change rooms.
The next stage includes building a BMX track, playground and public toilets.
Work will cost an estimated $730,000 and is expected to be completed by the end of the year.
The expansion of the centre began in 2013 and has been supported by funding from Council and Federal and State governments.
