Letitia Humphries was on Wednesday sentenced to 12 months imprisonment with the whole sentence suspended if she's on good behaviour for two years.

Justice David Mossop also ordered the 21-year-old complete 80 hours of community service.

The ACT Supreme Court heard that the group of friends had been out drinking at a bar in Mitchell when one woman alleged a man in Spence had committed a crime against her.

It was after 1am and the group drove to the Spence home where they banged on the door and then punched the window through which they all climbed in.

The court heard that once inside, members of the group punched the man and broke a plate over his head.

"Where's your phone?" a member of the group said to him.

The court heard they pushed his pregnant sister and mother aside.

The group grabbed the man's phone and later destroyed it at back at the club.

Humphries was arrested a few days later with some of her co-offenders and spent three days in custody.

She later pleaded guilty to a charge of aggravated burglary.

Justice Mossop said Humphries did not join in the kicking of the door, nor breaking the home's window.

She also did not join in the assault of the man inside.

The 21-year-old's role was significantly less than that of her co-offenders, he said.

He said the sentence was more lenient that it would have been because of her youth and the positive changes she'd made in the time since.

The judge told Humphries he hoped she was on the right track and that he would not see her in court again.

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