Which agency should be contacted first when demolishing a three-story structure?

The local building department is the most relevant agency to contact when planning to demolish a three-story structure. This department is responsible for overseeing the enforcement of building codes and regulations within a specific municipality. They ensure that any demolition project adheres to safety standards and local zoning laws.

Engaging with the local building department first is crucial for obtaining the necessary permits and approvals required before commencing demolition. They can provide guidance on the legal requirements that must be fulfilled, including notifying utility companies, and ensuring that environmental regulations are considered.

While state and county agencies are important for broader regulations and permits, the local building department has direct jurisdiction over construction and demolition activities within its area, making it the initial point of contact in such situations. The national level does not typically engage with specific building projects unless they involve significant federal funding or oversight, which is less common in typical demolition projects.