Landlords cannot choose renters or buyers based on a person’s race, creed, color, national origin, ancestry, nationality, marital or domestic partnership or civil union status, sex, gender identity or expression, disability, affectional or sexual orientation, family status or source of lawful income or source of lawful rent payment (such as rental assistance from the Housing Choice Voucher Program formerly known as Section 8).

But if you are 45 years old and your vehicle is a BMX bike with a blue tooth speaker taped to the handle bars and living with your mother because she is eligible for HUD, stamps and EIB, The only thing you may have to offer the opposite sex is the fact that you have access to running water.

Note that if this property IS in Seattle,  it is ILLEGAL to consider criminal history on your background check,   with a few very narrow exceptions,  basically for sex offender status. 

Both registered sex offenders, one with minor children by force the other with adults with violent force. 

if you deviate from one tenant to another that is where your discrimination/fair housing complaint comes in because you are make differences between different people. i.e. married vs unmarried, mixed sex or races, comfort animals, etc. 

This ensures you don't have a good tenant move in and then later add their drug-dealing boyfriend or sex offender uncle.

Found an omitted sex offender that way once.

Drunks stumbling around, sex offenders, stabbings and even now shootings in some of those neighborhoods.

Parent is squeeky clean but son is a sex offender or had a record dealing drugs.Young women (especially single moms) move into a rental and are great tenants.

I'm interested to know more about the concerns between roommates; sex assault, theft and just general bickering/fighting.