Documenting cultural heritage has become increasingly critical in the evolving domains of digital libraries, computing, and global information studies. Architecture and its expressions constitute a central component of this endeavor, given their intrinsic connection to human societies and their role as enduring manifestations of cultural heritage. The CIDOC CRM is a well-established and continuously emerging reference model aiming to represent cultural heritage information. This paper establishes a data model for the documentation of vernacular architecture using CIDOC CRM, thereby bridging a critical gap in the representation of culturally embedded architectural practices. In this paper, we discuss the notion of vernacular architecture and the previous work on documenting architecture. Through the classes and properties provided by the CIDOC CRM, we model the formative contexts of vernacular architectural practices, we represent the distinctive constructional, morphological, and typological consistencies inherent in vernacular architecture, and document the interrelations among vernacular stylistic traditions, including their temporal relationships and mutual influences.