The burglary took place between 4pm and 4.30pm in the Tullyowen area, on the Lifford side of the St Johnston to Raphoe Junction.
The owner of the house was only out for half an hour when the burglar struck.
It is unclear at this stage what was taken in the raid.
The burglary is understood to have gained entry through the backdoor.
Gardai are viewing CCTV footage in a bid to identify the culprit.Tags: