The singer pleaded no contest to a misdemeanor vandalism charge over the incident.
Bieber also was ordered to complete five days of community labour and a 12-week anger management programme, and to stay away from the victim and his family for two years.
The 20-year-old Grammy-nominated singer was not present for the hearing in California. His lawyer, Shawn Holley, entered the plea on his behalf.
A spokeswoman for Bieber said he is glad to have the matter resolved and behind him.
Prosecutors spent months deciding whether to file charges after the January incident. They considered felony charges because the damage was said to be more than 400 dollars (£230), the threshold for a felony.
Deputy District Attorney Alan Yochelson said he was satisfied with the misdemeanor charge and called egg throwing an "extremely immature and a silly act".
The singer's mansion was searched on January 14, and detectives later filed a search warrant to obtain images from Bieber's Instagram account to match them to surveillance footage taken from his home.
A detective wrote that a person matching Bieber's description was seen high-fiving his friends after running toward a neighbour's home, but footage of the egg attack was not captured.
Bieber was not arrested during the search of his home, but his friend and personal manager Xavier Domonique Smith was charged with felony drug possession.
Smith, an aspiring rapper who goes by the name Lil Za, pleaded no contest to felony possession of Ecstasy and was sentenced to probation and a drug treatment programme.
Bieber faces two other cases in Florida and Toronto. A Miami court has set a trial date this month for his driving under the influence case, which also includes charges that he resisted arrest without violence and was driving with an expired license.
A preliminary toxicology report showed that the singer tested positive for marijuana and the anti-anxiety drug Xanax after his arrest.
The singer turned himself in to Toronto authorities on January 29 on a charge that he assaulted a limo driver in late December.
Bieber gained stardom with his debut album aged 15 and his career has been guided by a pair of music industry heavyweights, singer Usher and manager Scooter Braun.
He was nominated for two Grammy Awards for his 2010 full-length album debut My World 2.0, but his popularity has waned.