Unlike most areas in Northern Virginia, the land around Clifton is far less built up than nearby areas, especially to its east and southwest. This was out of the worry that overdevelopment near Bull Run and the Occoquan River would be environmentally damaging to the Occoquan Reservoir. Consequently, as development edged near the area in the late 1970s and early 1980s, an ordinance was enacted stating that only one building could be placed on parcels that have not already been divided. Today, the southern and eastern portions of the area are heavily forested, with single-family homes, while the northern area has become equestrian areas.