What determines whether a project qualifies as residential construction?

A project qualifies as residential construction primarily based on its intended use and the type of structures involved. When the project revolves around single-family homes or duplexes, it falls squarely within the definition of residential construction. This classification is essential because it dictates the applicable building codes, zoning regulations, and licensing requirements, which are designed specifically for residential projects to ensure safety and suitability for living conditions.

The other options focus on factors that do not inherently define a residential construction project. For example, a project being contracted for a minimum of five years does not determine its residential status but rather speaks to the duration of the contract. Similarly, the oversight of a licensed architect may be relevant to many types of construction projects but does not specifically indicate whether the project is residential. Lastly, commercial zoning approval pertains to the use of the land for business or commercial purposes, which is outside the scope of residential construction. Hence, the defining characteristic lies in the nature of the structures—single-family homes or duplexes—thereby qualifying it as residential construction.