In which scenario would a grading and drainage permit be required?

A grading and drainage permit is typically required in situations where significant alterations to the land's topography or drainage patterns are involved. Stripping of topsoil can lead to changes in how water flows across a property, possibly affecting drainage in the surrounding areas. This type of activity can result in erosion, increased runoff, or unexpected flooding in neighboring properties if proper drainage is not maintained.

In contrast, constructing a small garage, installing a new fence, or pouring a concrete patio generally involve less earth movement and are less likely to affect existing drainage patterns significantly. Therefore, while these activities might require other types of permits, they don't typically necessitate a grading and drainage permit. The requirement for a grading and drainage permit is specifically linked to actions that have the potential to disrupt the natural landscape and water flow in a more substantial way, which is why the stripping of topsoil stands out as the appropriate scenario.