Which entity typically enforces building codes?

Building codes are primarily enforced by local government authorities. These entities are responsible for ensuring that construction projects comply with established safety standards, zoning regulations, and building codes specific to the area. Local governments employ building inspectors who review plans, conduct site visits, and verify that construction meets the relevant codes. This enforcement can vary from one locality to another, reflecting the unique standards and needs of individual communities.

State environmental agencies focus more on environmental regulations rather than direct building code enforcement, while national contractors' organizations typically provide guidelines and support for contractors but do not enforce codes. Homeowners' associations can set specific rules or guidelines for properties within their jurisdiction, but they do not have the authority to enforce building codes in the way that local government authorities do. Hence, local government authorities are the correct answer as the primary enforcers of building codes.