What is the primary function of the Georgia Department of Community Affairs?

The primary function of the Georgia Department of Community Affairs is to administer building codes and standards in residential construction. This agency plays a crucial role in ensuring that residential buildings meet safety, health, and structural standards as set forth in the state's building codes. By doing so, it helps to protect the welfare of the public and maintains the quality of construction throughout Georgia. The Department provides guidance and oversight to local governments and builders, ensuring that all constructions comply with established regulations.

The other choices do not align with the core responsibilities of this agency. Immigration enforcement, oversight of public transportation, and regulation of financial institutions fall under different state or federal agencies and are not part of the duties handled by the Georgia Department of Community Affairs.