Routine activity theory can be applied to places in which a motivated offender encounters a suitable target that is not effectively guarded. The focus of this article was on the third aspect of this theory as the explanatory power of guardianship was examined and compared to other related contextual factors in explaining criminal victimization at micro-places. This empirical study used an observational measure of guardianship in action in residential places by observing household occupancy, monitoring by residents, and direct intervention during the daytime and nighttime. The results demonstrated the significant role of active guardianship compared to other spatio-physical and sociodemographic factors in explaining the amount of property crime recorded at the street segment level. This article is concluded by highlighting the ways in which these contextual factors help generate opportunities for capable guardianship, while simultaneously blocking opportunities for property crime.