Here is the Seattle definition: “Discrimination” means any conduct, whether by single act or as part of a practice, the effect of which is to adversely affect or differentiate between or among individuals or groups of individuals, because of race, color, creed, religion, ancestry, national origin, age, sex, marital status, parental status, sexual orientation, gender identity, political ideology, honorably discharged veteran or military status, alternative source of income, participation in a Section 8 or other subsidy program, the presence of any disability, or the use of a service animal by a disabled person.

It went from things like wanting me to let them have a washing machine in the unit even though the owner said no to them and after I explained it's because the pipes can't handle it and sorry, I'm not losing my job over it for you (in a very nice way) -- furious reaction, no more friendship.... to wanting me to tell their neighbor to stop having such loud sex (not kidding) and when I said I don't tell other tenants how to have sex (again in a very nice way, while giggling no doubt), I lost that friendship. 

Tenants need to do some basic maintenance and upkeep themselves in SFR, in multis they generally rely on the landlord for everything.We have not seen a difference in default with our duplexes, and generally turnovers and damages are better, but we do have more day to day managing of duplexes - more maintenance, more neighbor issues (including a detailed conversation about a neighbors sex life on the other side of the shared wall), pests (much more difficult to say it is tenant caused in a multi), pet issues, lawn care.We do not have different criteria for our properties, but we score each application on a point system, and the multi's require fewer points to qualify. , because they attract a lower quality tenant.  

Ida Grochowska you need to find a way to get your hands on the actual credit report from one of the 3 bureaus - Experian, Equifax, TransUnion - a criminal background check & sex offender registration and educate yourself on how to read each one.

Other examples include violent crimes, sex offenders and really bad credit scores.

(My apartment house is across from a school so I wouldn't take sex offenders or drug sales in this particular property)

Do you check sheriff's websites for sex offenders? 

And only on their end.They would come to me and complain that so and so parks all crooked, or so and so has loud sex that wakes them up and I need to make them stop it, or they wanted permission to have a washer/dryer even if they weren't allowed because of the old plumbing system, or they wanted to let their relatives park in our parking lot and take the shuttle to the airport and leave their car in our lot while they went on vacation.It's just guaranteed that they will expect and ask for favors, that they would never expect or ask for - if the relationship was never ever perceived as a "friend" relationship.  

I've owned student rentals for 24 years and there are too many potential issues, when you just "shove" people together especially of the opposite sex.  

Also, what can I do about a unit that has a sex offender come visit everyday?