We live in a two-story duplex in Portland, OR. It's a converted single family home with an interior stairway connecting the two units. There's a door at the bottom of the stairway which sort of locks but not really. How do we deal with this? Special snowflake details inside.
The door at the bottom of the stairs is just a normal solid-core interior door with two slide locks, one on each side. Prior to today we didn't really think this was a problem. The downstairs tenants were respectful, and the tenants before them were the owners of the house.
The tenants just moved out and the cleaning crew was over, and one of them just opened the door and walked up the stairs. We wouldn't have even known he was here except that he started calling the landlord asking why there was a bunch of crap in the stairwell (we use it for storage).
I've asked the landlord on multiple occasions, both written and verbally, to install a lock on the door that neither tenant has a key to. So far it seems to have fallen on deaf ears. I just now submitted another maintenance request to have that done and threatened to install our own hasp and masterlock and mail them a key. Let's assume for a second nothing happens.
Is it legal to install our own lock on that door? What are the ramifications of doing something like that? This previous question
had some good answers about the possibility of just jamming the door shut, but it opens into their apartment so jamming it isn't viable.