Finding owners of apartment building (commercial properties)

[Michael Williams]

How would I locate the owner of an apartment building (commercial multi family property)? I use the assessor website in my county to find property owners but 80% of the time it'll be under a trust, LLC or property manager, is there a website where I can find the name and address of the person/ people who own the building? I'd like to send them a post card with a letter of intent to purchase and not have to worry about my letter/ post card being discarded.