Article 6 of the Zoning Ordinance limits paving and coverage of front yards.
 
For single family detached dwellings on lots containing 36,000 square feet or less in the R-1, R-2, R-3 and R-4 Districts, all parking for vehicles or trailers in a front yard must be on a surfaced area, except for  temporary parking on an unsurfaced area in a front yard for a period not to exceed 48 hours for loading, unloading, cleaning or repair of vehicles or trailers. In addition, on a lot with a single-family detached dwelling and containing 36,000 square feet or less, in the R-1 and R-2 Districts, no more than 25 percent of any front yard and in the R-3 and R-4 Districts, no more than 30 percent of any front yard may be surfaced area for a driveway or vehicle/trailer parking area; provided, however, that these limitations may be exceeded for a surfaced area that is:

1. Limited to 2 side-by-side parking spaces as long as the surfaced area is not more than 25 feet long and 18 feet wide;
2. On a lot which has its primary access from a major thoroughfare and consists of 2 side-by-side parking spaces and a vehicular turn-around area as long as the surfaced area is not more than 25 feet long and 18 feet wide and the turn-around area does not exceed 150 square feet; or
3. Provided as an accessibility improvement as approved by the Zoning Administrator.

Surfaced area includes asphalt, poured or precast concrete, brick, stone, gravel, or any other impervious surface, or grasscrete or other similar pervious surface. On a pipestem lot, the surfaced area within the pipestem driveway is not be included in calculating front yard coverage.