A family has been left shocked after they discovered someone had not only defecated on their property but also stolen an umbrella.

Bizarre footage from a home security camera showed a man walking through the front yard of the Granville property in Sydney's west in the early hours of the morning.

The man, wearing a t-shirt and pants, casually walked onto the property with a roll of toilet paper held in his hand.

The stranger walked out of the view of the camera before he allegedly defecated on the property.

The man reappeared on camera and walked off the property with the toilet paper in one hand and an umbrella in the other.

Anyone with information was urged to contact Crime Stoppers on 1800 333 000.