Final answer:
The building department is tasked with enforcing building codes, not writing them. These codes ensure the safety and livability of buildings.
Step-by-step explanation:
The building department does not write the code; rather, it is responsible for enforcing the building codes that are established by legislative bodies or specialized code councils. These codes include a variety of safety requirements such as the necessity for running water, working ventilation and heating systems, structurally safe construction, smoke detectors, and properly installed electrical wiring. The main goal of these safety codes, while occasionally seen as burdensome and costly to enforce, is to protect the inhabitants of the buildings.