Skip tracing owners of Commercial property and LLCs

[Joshua McCarthy]

Does anyone have any suggestions for how to go about finding owners of commercial properties such as large apartment buildings? I believe parcel search for Erie County NY only shows results for residential. Also, I've also always had a hard time finding the owner of an LLC. If the name of the owner doesn't come up with a quick google search i'm usually just left with the address that the LLC is registered to. Does anyone have any tips that have worked for them with either?

Thanks

Josh