Final answer:
A permit is typically required for structural changes, major remodeling, significant electrical or plumbing work, and HVAC installations. The definition of a substantial improvement depends on local codes. It's essential to check local regulations to ensure compliance.
Step-by-step explanation:
Projects that typically require a permit are those that involve substantial changes to the structure, systems, or footprint of a building. These are often referred to as substantial improvements. Common examples include adding an extension, major remodeling, structural changes, significant electrical or plumbing work, and installation of heating or cooling systems. Local building codes and regulations define the specifics of what constitutes a substantial improvement and when a permit is necessary. It is crucial for anyone planning construction or remodeling work to check with their local building department or authority to ensure compliance with the necessary building permits and regulations.