1. The entire site complex shall have a unity of design by use of similar wall and roof materials, roof slopes and window patterns, in order to reduce adverse visual impacts to those on and along major access routes and to mitigate adverse impacts from major access routes on nearby, less intensive uses.

2. Rooftop equipment shall be visually screened pursuant to LUC 20.20.525. The design and color of rooftop mechanical screening should be integrated with the building architectural style.

3. The building should include architectural elements that provide weather protection such as overhangs and recesses at building entrances.

1. The provisions of LUC 20.20.520, Landscape development, except as they conflict with this section, shall apply to development in the OLB District.

2. Except for retail auto sales uses, a minimum of 15 percent of the property area of each site shall be in landscaped open space. For each percent that a structure’s ground floor area exceeds 15 percent, the landscaping requirements for that site shall be increased by 0.5 percent to a maximum of 20 percent of the property area of the site.

3. Service yards and at-grade mechanical equipment shall be sight-screened from adjoining property or streets or highways by a solid planting of evergreen trees and shrubs at least as high as the equipment or use being screened within two years from the time of planting.

4. Except for retail auto sales uses, parking areas shall include plantings using trees of 3 inches caliper or 14 to 16 feet high and 42-inch-high shrubs at approximately 35 feet on-center parallel to the aisle, or shall be screened as a service yard using similar materials. Other parking lot landscaping shall meet LUC 20.20.590 requirements for Type V landscaping. Plantings shall include a minimum of 50 percent native species. Noxious species, as designated by the Director in submittal requirements, are prohibited.

5. When property abuts the right-of-way for I-90, I-405, or SR 520 highways, or abuts parallel frontage roads of said highways, plant material shall be planted and spaced in a planting area a minimum of 10 feet wide. Deciduous trees shall have a minimum caliper of 3 inches, evergreen trees shall have a minimum height of 14 to 16 feet tall and shall be at intervals of no greater than 35 feet on-center along the right-of-way. No more than 30 percent of the trees shall be deciduous. Trees shall have a minimum mature height of 45 feet. Shrubs shall be a minimum of 42 inches high.

6. Trees installed as part of general site landscaping shall be a minimum of 1.5 inches in caliper or 8 to 12 feet high.

7. Accessible outdoor gathering areas should be provided for the employees, general public and visitors to the site.

8. Outdoor display of vehicles for retail auto sales uses shall meet the requirements of LUC 20.20.520 for Type V landscaping for auto display areas and LUC 20.20.520.F.2.c for vehicle storage yards.