[header] How to prevent crime around rental properties [title] Meet or exceed state and local housing safety standards. [step] Check the guidelines for building security such as window locks and deadbolts and make sure your units are up to code. [substeps] You typically can find a copy of the local housing regulations at your city housing office. 
They also may be available in the local library or on your city's website. Typical requirements include peepholes and deadbolt locks.