A computer-implemented system for coordinating the design and implementation of a structure is disclosed. The system includes a design workspace, a design engine which receives various inputs and produces a structure design for display in the design workspace, first and second interfaces permitting first and second users, respectively, to view and manipulate a design, either independently or concurrently, and a library of design elements and editing tools accessible to the first and second users. One or more users may be provided with controls limiting the manipulations that other user(s) may make to the design. Change tracking and error and conflict checking are provided to assist with merging design manipulations originating from separate users.