Verifying Owner's # of Rental Units

[Ryan H.]

Hello, in Portland, Oregon, we have a tenant protection ordinance that has landlords assist with relocation expenses for no-cause evictions, but not if the owner has no other rental units.  Currently, I'm a tenant on a property that is about to be sold, and the new landlord may or may not want me to leave.  How do I determine/verify how many rental units the new owner has?  Is there a way to look this up online?

Best,

Ryan