These are my belongings.
My belongings are missing.
Whose are these belongings?
Your belongings are also your property in the sense that you own them. But the word you are looking for is "belongings". "Property" can include everything, including your car or house.
"We are not wholly bad or good, who live our lives under Milk Wood"
prayer of the Reverend Eli Jenkins in Under Milk Wood by Dylan Thomas