An end-of-summer party turned into booze-soaked rager on Long Island, as cops caught nearly 400 teens at a house in Great Neck.

Nassau County Police said they responded Tuesday night to a house on Old Mill Road, where they found “a large house party consisting of approximately 400 people, most of whom were underage.”

Two 15-year-olds and a 16-year-old girl were taken to a hospital suffering from severe intoxication.

The homeowner received an appearance ticket for violating the Social Host Law, and is due in court later next month. 

An attorney for the family said the party was supposed to be a small end-of-summer get-together for their 16-year-old daughter.

But according to authorities, word about the party got out on social media, and teens from New Jersey and Connecticut showed up. 

As of Wednesday afternoon, several bottles that smelled like alcohol could still be seen outside the sprawling home. 

Photo Credit: AP