The grandstand was closed to the public in April last year after an independent engineering assessment deemed its degrading state severely compromised the structure's safety.

Demolition of the grandstand will require a one-off cost of up to $25,000.

Hindmarsh Shire mayor Cr Ron Ismay said a proactive decision was made on the grandstand.

"The fact is that it needs to come down, we may as well do it. It needs to be demolished anyway; it's come to the end of its life," Cr Ismay said.

"There were sections of it that had rotted away. The thing was built an awful long time ago. It's just had its life.

"There had been assessments on repairing it, but they can't give any guarantee of longevity.

"It's one of those things that you could throw a heap of money at it and still have something that 10 years down the track you might be back in the same space."

A council report explored possibilities of strengthening works on the grandstand and the option of constructing a new structure.

Strengthening works, estimated to cost $250,000, were expected to extend the life of the grandstand by five to 10 years.

Replacement offered a "useful life" of approximately 50 years, at an estimated cost of $1.5 million.

Council allocated $100,000 in its 2019-20 budget towards facilities at Davis Park. Further funding will be sought to construct a replacement grandstand.

"We've allocated some money out of our budget towards doing something with it (grandstand), but we haven't got the funding to be able to replace it," Cr Ismay said. "We are in the process of applying for grants, and we're quietly confident we'll get something.

"All these things (grants) all get oversubscribed, so it's the luck of the draw a little bit. But, we've got to be in there trying. It may take a while."

Cr Ismay said the new grandstand was likely to take a different form, with the council forced to comply to modern standards.

"It (grandstand) will probably be something different," he said. "The worst of it is all this commercial stuff. You could put up a hay shed and have seating in it, but once it becomes commercial, you've got all this other damned business with public safety stuff and this and that.

"It escalates the cost through the roof.

"We're looking at our options at what is out there."

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