Hi Bao,I can understand your frustration, I have been there, making offers and other investors getting the deal.

Good point Marcia as to occupant.An occupant is any party in occupancy or possession, may or may not be a tenant or lease named in any lease or rental agreement.As to limiting occupancy, this can get touchy as a tenant has rights of quiet enjoyment, the right of use and the definition of family may include unmarried or same sex members.

What are the implications of buying a property with a registered sex offender living in it?

Oh god where do I start....You may have seen me on The First 48 following a murder In one unit of a building we have had 3 tenants die in 15 monthsVarious offers of sex for rent to maintenance staffThe Feds took over property we managed as owner turned Out to be a drug traffickerMore fires due o stove left on than I can countEmployee/ resident shot coming home late night from guy hiding in bushesTenant mad because apartment broken into and her cake she baked was stolen....not concerned about the rest of her stuff Countless tenant stole the kitchen and left water runningI could go on for days from stuff over the last 10 yearsI will challenge any pm to a trade off of great management stories.....property management nothing to it

And lest anyone suspect that "working class" is a euphemism for a certain race, we had Mexicans, Hispanic Arizonans, African-Americans, an Ethiopian immigrant, whites, veterans, and lessees of both sexes.

And some locales, as well as certain privatized military housing, have complicated formulas regarding the ages/sex of minors that can share the same bedroom with other minors and/or adults.

Provide them with neighborhood crime reports, sex offenders in proximity to the property, necessary repairs, foreclosures in the area, cheap comparables, any signs of distress in the neighborhood (vandalism), news-paper clippings with bad local economy news, etc....It would seem the ideal model might be a lower 1st with higher 2nd?

Then I had someone come back as a registered sex offender-- nice guy, good references, plenty of income.

Nationally (protecected classes highlighted):In the Sale and Rental of Housing: No one may take any of the following actions based on race, color, national origin, religion, sex, familial status or handicap:Refuse to rent or sell housingRefuse to negotiate for housingMake housing unavailableDeny a dwellingSet different terms, conditions or privileges for sale or rental of a dwellingProvide different housing services or facilitiesFalsely deny that housing is available for inspection, sale, or rentalFor profit, persuade owners to sell or rent (blockbusting) orDeny anyone access to or membership in a facility or service (such as a multiple listing service) related to the sale or rental of housing.Fair Housing--It's Your RightLocally there can be others.

You can also see population trends, # of sex offenders, and lots of other information.