As REALTORs we are not actually tell you what is safe or unsafe in general. The best advice that I could give to you is searching the address of the home on the web - google the address, then look up the the zip code or subdivision on the web as well. There are numerous sites that will allow you to get information on crime stats, or sex offenders and even pinpoint where they are registered. You should also check out the local or Houston Police Department's crime records and statistics.
Another great way to find out for yourself is to drive the community at different times of the day especially at night to get a feel for the area and neighbors.
Good luck to you and if you need further assistance please email me!