A modular stackable enclosure system is disclosed herein. The system includes a base structure including a cavity that includes a component mounting surface. The base structure also includes a plurality of modular ports configured to provide openings to the cavity. The base structure also includes a plurality of accessory mount interfaces, configured to receive a plurality of corresponding toolless-attachable accessory mounts. The system also includes a plurality of port plates, each configured to fit into a port of the plurality of modular ports. The system also includes a plurality of port plate attachments, each configured to fit into a corresponding port plate. The system also includes a cover, configurable to attach to the base structure, such that the cover is movable to cover or expose the cavity.