  The electronic design industry has undergone a significant transformation,
transitioning from traditional hand-drawn designs to modern automated design
processes. While Computer-Aided Design (CAD) tools emerged alongside the
electronic industry, the current building design process has little to no
automation. There is a need for a unified platform to address the complexity of
building design and provide a more systematic approach. Platform-based design
(PBD), originally developed in the electronic industry, enables efficient
design processes by promoting the reuse of hardware and software systems. It
also facilitates design space exploration while optimizing performance. This
paper proposes a modular approach that divides the building into various
disciplines and introduces a design flow using the PBD framework to streamline
the design process. We also present a case study that demonstrates the use of
the PBD framework in the Heating, Ventilation, and Air Conditioning (HVAC)
systems design.
