Which of the following activities does not require a permit?

The correct activity that does not require a permit is the installation of a fence less than 7 feet high. Many jurisdictions have specific regulations that allow homeowners to build fences under a certain height without needing to obtain a permit. This is because shorter fences are generally considered to have minimal impact on the surroundings and the overall aesthetics of a property. Keeping such requirements helps to streamline the permitting process for minor projects, allowing homeowners to make improvements without excessive bureaucratic hurdles.

In contrast, the other activities listed typically involve more significant alterations to one’s property, which can affect drainage, property lines, or the structural integrity of existing buildings. Building a garage, constructing a gazebo, and adding a swimming pool usually require permits to ensure that they meet safety standards and zoning regulations, protecting both the property owner and the community at large.