Sheriff's officials removed Lohan's bracelet monitoring equipment shortly before 10 a.m., according to Los Angeles County Sheriff's Department spokesman Steve Whitmore.
The charge violated the terms of her 2007 conviction for driving under the influence.
Her punishment was reduced from 120 days to 35.
Last week, Lohan met with a judge after reports that the actress drank during a rooftop party at her Venice home June 12.
At the meeting, the judge scolded her but ruled that she did not violate the terms of her probation. The judge did tell Lohan she could no longer hold parties while serving her sentence.
Now that her house arrest stint is over, the "Mean Girls" star must complete the 480 hours of community service as part of her punishment given over her theft case.