John Moher told the Circuit Civil Court that An Post clerk Edward Murphy had "the lights beaten out of him" after having been attacked by brothers Neil and Stephen Carroll when he complained about loud partying in their neighbouring flat.
Judge Matthew Deery also heard that Mr Murphy's sister, Helen, and his wife, Hayley, also had to flee the apartment they shared at The Crescent, Rathbourne Court, Ashtown, Dublin.
The judge said Mr Murphy had been punched and kicked around the face, head, neck and back while scuffling with Neil Carroll. Mr Murphy had claimed he was being held down and also assaulted at the time by Stephen Carroll.
Judge Deery said student Helen Murphy had suffered bruising when she had been grabbed by her arms and pinned against a wall in the hallway outside their apartment. The court heard she had been called and "English c***" and a "whore".
She had been so fearful for her safety that some months later she had returned to her native England.
The judge accepted that Hayley Murphy had not been physically assaulted, but had suffered trauma as a result of the attacks of November 7, 2010.
She and her husband Edward, with Helen, had been advised by gardai on that night to leave for their own safety.
As a result, they and Helen had lived with Mr Murphy's mother on the Navan Road, Dublin, for weeks.
Judge Deery said that when Garda David Fahey arrived at the Ashtown apartments he found Neil and Stephen Carroll with their T-shirts off. They appeared to be drunk and he had advised the Murphys to get out if they had somewhere to go.
Mr Moher told the court that the Murphys' landlord was Frank Carroll and that they had complained to him about noise and loud music from his son Neill's apartment.
Nothing had been done and when Hayley had gone to complain on November 7 she had been told to f*** off.
Later the Carroll brothers had attempted to enter the Murphy apartment, had pulled Edward into the hallway and had set upon him. The brothers denied the assault and claimed Mr Murphy had started it and had come off worst.
Judge Deery awarded Edward €12,255; Helen €9,161 and Hayley €7,147 against all three Carroll family members.
He said the father, Frank, while not involved in the assaults, had done nothing to curb the noise and partying.