Ashley Greene -- Nightmare Tenant

Ashley Greene's condo fire was tragic but also not totally shocking to other residents in the building, who say the actress was trouble.

Multiple sources in Ashley's West Hollywood condo building tell TMZ ... the actress was an utter nuisance -- they say her unit was a revolving door for her fellow actors, friends and others who came and went in the middle of the night. The people who lived below Ashley say there was so much commotion above them they had trouble sleeping.

On top of that, residents complained that Ashley didn't control her dogs -- which were incessant barkers.

We're told residents complained to building management, but nothing happened.

Here's the kicker ... The owner of the unit will be fixing it up, and she says Ashley is welcome to live there again -- that's because Ashley has always paid her rent. Wow.