Some properties, such as Garages, Armouries, Casino Games, Bullet Factories, and Money Transfer Agencies can be owned by players.
If you own a property the money made will go to your cash, a protection tax is taken out of this and paid into the vault of your local syndicate.
Each property is specific to the location its in.
To gain ownership of a property you must visit it (e.g. clicking on Garage in the HQ dropdown) in the location where it is unowned. Properties can be dropped by players, or become available if the player holding the property is killed.
You can drop your property, or send it to another player, by visiting Trade > Properties and clicking the appropriate button.