Several Dolls Point homes were inundated when huge waves smashed over the seawall and swept across the road during weekend storms.
Part of the concrete footpath on the seawall, which was replaced only six months ago after storm damage, was uplifted, and cracks extend well beyond.
Long sections of the new aluminium fence along the walkway, as well as timber railings on the viewing platform, were swept into Botany Bay.
The viewing platform also suffered structural damage, and Rockdale Council faces another massive repair bill for all the required works.
Removing the thick covering of sand on the walkway and cycleway will be a big job in itself.
During the king tide on Sunday night, residents were shocked when waves broke over the seawall and swept across Carruthers Drive into homes.
The water also ran through backyards, inundating two homes in Smithers Avenue, which is behind Carruthers Drive.
The next day, Rockdale Council distributed 25 sandbags to each property in Carruthers Drive to counter another king tide on Monday night.
Residents filled the bags themselves from a load of sand deposited by the council.
Helen Pappas said waves smashed the brick fence of their Carruthers Drive home into pieces and water was knee-deep throughout the downstairs.
Ms Pappas, her husband Chris, and children Johnny, 20, James, 17, Alexander, 10, have been renting the two storey house since January.
The family fled upstairs as the water gushed through the downstairs.
“It was scary,” Ms Pappas said.
“So many things were ruined – the fridge, washing machine, clothes, and also our car.”
Ms Pappas said their driveway was “a mud-heap”, and she was grateful to the council for cleaning it up.
She was angry with their landlord, whom she said was slow to arrange repairs.
Ms Pappas said the landlord was not worried about the damage because he intended to knock the house down and redevelop the site.
Marilyn Smith, who lives a few doors away in Carruthers Drive, said her family was fortunate water flooded only the garage.
”The spray from the waves was as high as the power lines,” she said.
“We have been here 18 years and have never seen anything like it.
”Our next door neighbour grew up here and has not seen anything on this scale.
“The bay has changed dramatically since the runways and Port Botany were built, and the groynes that were built are no longer effective.”
Elisa Natta, who has lived in Skinners Avenue for 54 years, said water “about three inches (7.6 centimetres) deep” ran through her house.
“It has only happened one other time, and that was about 25 years ago,” she said.
