Smart Buildings are composed of heterogeneous sensing, actuation and control devices across multiple network layers to provide energy efficiency, security, comfort, safety and operational efficiency. However, the increasing complexity and attack surface of Building Automation Systems have created the need to implement advanced security measures. Studies, aimed at improving security in Smart Buildings implementations, have been slowed by the scarcity of realistic network topologies both for developing, testing and evaluating security measures. In literature, topology generators already exist; however, they focus more on structural graph properties than domain-specific constraints, essential in Smart Buildings, such as protocol compatibility and device capacity limits.