In this paper, we analyze the distribution of Late Postclassic (A.D. 1250–1500) architecture and associated artifacts of the Maya site of Caye Coco, Belize. Artifact density and distribution suggest that different buildings served different functions and reflect a range of domestic and non-domestic activities at the island. An assessment of the labor investment required to build the seventeen structures at Caye Coco provides evidence of the degree of social hierarchy at this site, as many more people would have been required to build its elite residences than could have lived in them. The shift in the focus of architectural construction to the island at Progresso Lagoon in the Late Postclassic contrasts with the predominance of construction on the west shore during the Terminal Classic period. This trend reflects the emergence of a new political center among the lagoon settlements. It also may suggest an increased concern with aquatic transportation of trade goods during the Postclassic period, as Caye Coco is the most prominent island of the lagoon, which connects directly to the Caribbean Sea. The architecture at Caye Coco suggests that Late Postclassic political organization of northeastern Belize was more hierarchical than has been previously documented. This paper is the first systematic effort to quantify architectural labor investment and size distribution at a southern lowland Postclassic Maya site in order to address the issue of sociopolitical hierarchy.