What constitutes an ADU

[Jennifer Barr]

I invested in a great house in Portland with a couple friends. We did a bunch of upgrades to the basement turning it into living space. No kitchen but there is a small sink and we have a nice two burner cooktop a toaster over. And a microwave.  We then rented it out to a company that in turn sublet the main house for below market rent and then rents out the basement on Airbnb.  It has its own entrance.  The only shared thing other than utilities is the laundry is in the basement. (Although the plumber said we could easily put one in the garage in the future if we wanted.   Anyway my question is can we rent out the basement to someone as a separate unit from the upstairs without it being a kitchen?  We did everything by the book. All permitted and egress windows.