Detective Senior Constable Richard Hughes, of the Warrnambool police crime investigation unit, said entry was not gained to the home and the offender, who was wearing a hoodie, ran off.

He said that at 12.15am Thursday the victim was asleep in a rear bedroom of a home being renovated when she was woken up.

The victim looked out the bedroom window over the rear of the property and saw a person. 

"The female resident screamed and the person fled," Detective Senior Constable Hughes said.

"She saw that glass of the window had been broken and called police. The victim was not able to provide a description of the offender to police other than that person’s height."

The police officers who attended at the home found a rock on the rear patio near the window.

The victim told officers about a week ago she found the lock to her garden shed had been cut but nothing was stolen. 

She said the person wearing the hoodie was short, about 165cms tall.

The rock used to smash the window is believed to have been obtained from a neighbour's backyard. 

The hole in the window was made near the window lock, which contained a key.

The curtain was also pulled shut and there was a piece of dowel in the internal window channel.

Detective Senior Constable Hughes requested that anyone with information about the offence contact the Warrnambool CIU or Crime Stoppers on 1800 333 000.