National Codes

Model codes may be developed by an international body and adopted or supported at the national level. The primary objective of a building code is to provide minimum safety, guard public health, and provide energy efficiency in new construction. Existing structures generally are required to meet the code that was in place when the property was built. However, newer codes may apply to an existing building when it is altered or a permit is required. A change in occupancy may also impact which code applies.