On any zoning lot located partially within the designated open space, the City Planning Commission may grant a special permit to allow a building to encroach on the designated open space where development is not feasible without encroachment on the designated open space. As a condition for permitting such construction, the Commission shall find that the development, as authorized, will result in the minimum interference with the designated open space that must be permitted in order to allow reasonable development and bulk distribution under the regulations of the underlying district or as such regulations are modified by the provisions of this Chapter.

The Commission may prescribe appropriate conditions and safeguards to enhance the character of the designated open space.