Which of the following tasks must be performed by a licensed contractor?

A licensed contractor is required to perform tasks that involve building, construction, or substantial alterations, which is why carpentry falls under their scope of work. Carpentry involves more than basic handyman tasks; it requires knowledge of construction standards, building codes, and safety regulations that a licensed contractor is trained to handle. This ensures that the work meets legal and quality standards.

On the other hand, tasks like mowing lawns, cleaning gutters, and painting indoors often do not require a specific license because they are generally considered maintenance or minor home improvement tasks. These activities can typically be performed by anyone without specialized training or licensure, allowing homeowners more flexibility in choosing how they maintain their property. Only operations that significantly affect the structure or integrity of a building, such as carpentry, necessitate the oversight of a licensed contractor to ensure compliance with safety regulations and construction standards.