I'm certain someone has encountered this before.
One of my properties is one of a cluster of 4plexes but only one is close and open to my property. No issues for the first 4 months but then the close property had a tenant bring in a roommate with 3 kids. Now that tenant (not mine) is so loud and inconsiderant that I had one of my tenants break their lease to move.
The owner/landlord of the other property is as hands off as possible but did try to remove the roommate until he was scared of by threats of litigation. We gave the landlord a copy of the local tenant landlord act showing that the roommate could be removed without issues or courts being involved but he has backed down and I don't have a strong enough relationship with him to push it.
At this point we've been reduced to just calling police for noise complaints when other tenants let us know but I'm not sure if there is anything else I can do shy of aggressively demanding the other owner get his tenants under control. Any thoughts or suggestions would be appreciated.
You can continue trying to work with the other Landlord to help him correct the problem. That probably won't work but it's worth a shot.
If his tenants are scaring off your tenants, you could threaten to sue him for the loss of income due to his tenants' behavior. Then he can choose whether he is more afraid of you or the tenant.
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