§ 16-34.013. Supplemental zone.

For purposes of these regulations, the area between any building, parking garage, or parking lot and the required sidewalk, when no intervening building exists, shall be defined as the supplemental zone. Supplemental zones shall meet the following requirements. Except as otherwise specified below, the square footage contained within a supplemental zone which meets all the following supplemental zone requirements may be counted towards UOSR or public space requirements.

1.

Supplemental zone general requirements.

a.

When sidewalk level residential units are provided, supplemental zone shall be landscaped with the exception of terraces, porches, stoops and walkways, which may occupy a maximum of two-thirds of the supplemental zone area;

b.

Terraces, porches and stoops shall have a maximum finished floor height of 24 inches above finished-grade, unless existing topographical considerations render this requirement unreasonable, subject to the provisions in subsection 16-25.002(3);

c.

The supplemental zone shall be no more than 24 inches above the adjacent public sidewalk for a minimum linear distance of 15 feet from the nearest edge of the adjacent public sidewalk, unless existing topographical considerations render this requirement unreasonable; and

d.

Any authorized walls surrounding landscaped and grassed areas shall not exceed a maximum height of 24 inches, except retaining walls, which shall not exceed a maximum height of 36 inches unless existing topography requires a retaining wall of greater height.

e.

Fencing permitted only when:

i.

The supplemental zone is located between sidewalk level residential units and the adjacent street; or

ii.

Said fencing is used to separate authorized outdoor dining from the required sidewalk.

2.

Supplemental zone widths. Along front and side façades shall be a minimum width of five feet when located along streets which function as arterial streets and collector streets.

3.

Supplemental zones containing a depth of 15 feet or less shall meet the following additional requirements:

a.

No balcony shall encroach more than ten feet into the supplemental zone area.

b.

Shall not be counted towards UOSR or public space requirements unless visible and accessible to the general public from the adjacent public sidewalk, with the exception of areas adjacent to sidewalk level residential units.

4.

Supplemental zones containing a depth greater than 15 feet shall be counted towards UOSR or public space requirements only when the following additional requirements are met:

a.

Shall permit and encourage pedestrians to walk on a minimum of 80 percent of the surface of the supplemental zone excluding fountains, pedestrian furniture, public art and similar elements.

b.

When adjacent nonresidential ground floor uses are provided, shall be visible and accessible from any point along 90 percent of any adjacent sidewalk.

c.

When adjacent nonresidential ground floor uses are provided, all sides of buildings fronting said zone meet the requirements of subsection 16-34.014(6).

d.

When adjacent residential ground floor uses are provided, shall provide a pedestrian walkway from said space to the adjacent public sidewalk. Said pedestrian walkway shall be perpendicular to the street and shall connect directly to the public sidewalk and shall be uncovered and open to the sky along its entire length.

5.

Developments of greater than one acre in area and adjacent to existing transit stops which have no shelters shall provide a shelter within the supplemental zone for a minimum of one such stop. The design and location of such stop shall be approved by the director of the bureau of planning.

(Ord. No. 2002-40, § 1, 5-28-02)