The incident happened sometime on Friday 18 December and caused four holes in a double glazed window.
The criminal damage is being investigated by Guernsey Police, who are searching for witnesses or anyone else who has information about what happened.
Witnesses are asked to contact police at the station on 725111. Alternatively, people can contact Crimestoppers anonymously on 0800 555 111.
Pictured top: The criminal damage was carried out at a property on Cordier Hill on Friday 18 December.