Guelph Police were called to a Paisley Road address for the report of a break and enter on Saturday.
The residents were away and when they returned, the front door was open and the lock had been damaged.
The entry is believed to have occurred between the night of June 28 and the morning of June 30.
No theft appears to have occurred, police said in a Monday press release.
Anyone with information about the incident are asked to contact police.