A Thurgoona home has been trashed after 100 young people swarmed on the site after being alerted to the gathering on social media.
The large group of teenagers attended the Feathertop Circuit home on Saturday night.
Previous tenant Karen Gray and her son had moved out just three days earlier.
She received a call from frightened neighbours on Saturday night as a growing crowd of teenagers descended on the home.
Windows were smashed, plaster pulled from walls, a door ripped off and broken, and blood and alcohol left inside.
Dozens of cans and bottles were scattered.
Ms Gray said it was shocking to see the family home she raised her son in damaged in such a way.
"I lived there for seven years and I cried seeing it like that," she said.
"The neighbours were frightened, everyone was a bit shaken by it.
"It was just unbelievable."
Ms Gray said there had been 100 people at the site when she arrived, with teenagers blocking the road.
Multiple calls were made to police and the group scattered when they attended.
"The police let me go inside the house and it was completely trashed," she said.
"I'd only handed the keys in on Wednesday and we'd spent weeks cleaning it from head to toe and doing up the yard for the owner to move back in.
"It was heartbreaking to see.
"My son and I were very attached to the house, it was a very sentimental place for us."
Police stopped and spoke to 17 youths at the scene.
A spokeswoman said the damage was "extensive".
A nearby resident, who lives on her own, said it had been "terrifying".
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"I was shaking, shaking like a leaf," she said.
"I was still worked up about it the next day.
"Nobody was arrested, they couldn't target anyone as the damage had already been done."
Another neighbour said there had been "people everywhere, in and out of the house, cars coming and going".
"When the police came, it was like ants or spiders running from a nest, they took off down the street," she said.
The owner was preparing to move back into the residence.
The damage bill is likely to be several thousand dollars.
A police spokeswoman said officers attended the home about 9.30pm and said there were about 100 people at the scene.
"It's believed the party was arranged via social media," the spokeswoman said.
"As inquiries continue, anyone with information is urged to contact Albury Police on 6023 9299, or Crime Stoppers on 1800 333 000."
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