Which action must be taken before starting the demolition of a building?

Before beginning the demolition of a building, obtaining a demolition permit is a crucial step. This permit is typically required by local government authorities to ensure that the demolition is conducted safely and in compliance with established codes and regulations. The process often involves submitting plans and notifying various agencies, which helps to assess any potential hazards and environmental concerns associated with the demolition.

Having this permit ensures that the necessary guidelines are followed to protect public safety, preserve the environment, and safeguard the surrounding infrastructure. It's important to note that working without a permit can lead to legal ramifications, delays in the demolition process, and potentially hazardous conditions.

While other actions may be necessary, such as notifying fire departments in certain cases or ensuring safety measures with utility companies, the fundamental requirement of obtaining a demolition permit stands out as the initial legal step before any demolition activities can commence.