1. Industrial, at least seven percent of the gross area. This may be reduced to not less than five percent upon approval of the review committee. (The gross area to be landscaped may only be reduced by the review committee if there is a showing by the applicant that the intent and purpose of this chapter and subsection B of this section are met.)

2. Commercial, at least seven percent of the gross area. This may be reduced to not less than five percent upon approval of the review committee. (The gross area to be landscaped may only be reduced by the review committee if there is a showing by the applicant that the intent and purpose of this chapter and subsection B of this section are met.)

3. Multiple-family, 25 percent of the gross area. This may be reduced to not less than 15 percent upon approval of the review committee. (The gross area to be landscaped may only be reduced by the review committee if there is a showing by the applicant that the intent and purpose of this chapter and subsection B of this section are met.)

4. A parking lot or parking structure built in any zone providing parking spaces as required by the zoning ordinance shall be landscaped in accordance with the commercial requirements set forth above in subsection (A)(2) of this section.

5. Any addition to or expansion of an existing structure or parking lot which results in additional lot coverage shall be landscaped as follows: Divide the amount of additional lot coverage (building area, not including basement or upper floors, plus required parking and loading zones) by the amount of the existing lot coverage (building area, not including basement or upper floors, plus required parking and loading zones), multiply by the percentage of landscaping required in the zone, multiply by the total lot area of both the original development and the addition; however, the total amount of the landscaping shall not exceed the requirements set forth in this subsection.

1. Compatibility with the proposed project and the surrounding and abutting properties and the uses occurring thereon.

2. Screening the proposed use by sight-obscuring, evergreen plantings, shade trees, fences, or combinations of plantings and screens.

3. The retention of existing trees and natural areas that may be incorporated in the development of the project. The existing grade should be preserved to the maximum practical degree. Existing trees shall be provided with a watering area equal to at least one-half the crown area.

4. The development and use of islands and plantings therein to break up parking areas.

5. The use of suitable street trees in the development of new subdivisions, shopping centers and like developments. Certain trees shall be prohibited in parking areas: poplar, willow, fruit, nut, birch, conifer, and ailanthus.

6. Suitable watering facilities or irrigation systems must be included in or near all planted areas;