Systems and methods for interacting with and customizing a dynamically extensible and automatically configurable BAS. In one embodiment, the BAS includes a plurality of end devices, at least one communication network, a protocol-independent server engine, and a user interface. User customization options are presented by and accomplished through a graphical user interface. In addition to providing a portal through which users may access, manage, and customize the BAS, the user interface itself is customizable in accordance with and complimentary to the dynamic extensibility of the system.