Sydney's famous Andrew Boy Charlton Pool will be open to "pooch pool parties" one day a year, following a decision passed on Monday night.

In a unanimous decision, Sydney City Council passed a motion forwarded by Deputy Lord Mayor Linda Scott to allow for a "doggy pool party" for one day only on the final day of the summer swim season, at the famed harbourside pool.

Pooch pool party people. From left to right: Sam Nolan, Colin Crowley with Rupert (dog), Matt Baker with Pepa (dog), Councillor Linda Scott with Tumshee (dog) and Nicola O’Hanlon with Towskey (dog). Credit:Dean Sewell

Councillors moved to investigate options for the opening of the seasonal pool to dogs, upon confirmation from the NSW Department of Health that the activity is suitable, and safe and healthy for dogs - and subject to cleaning costs following the event.

As the pool is usually cleaned when it closes for the winter season, this doesn't add any significant cleaning costs Councillor Scott said.