Chapter 2ݤ9229 TREE PRESERVATION AND PLANTING REQUIREMENTS
Ukiah Zoning Code § 9229.5 Street Tree Design Principles
Ukiah Zoning Code · 2026-07 edition · updated 2026-09-09 · Ukiah
Cite as: Ukiah Zoning Code § 9229.5 · Text as of 2026-09-09
The spacing and species selected for use as street trees and included in Table 21: Required Street Trees for Primary Streets, Table 22: Alternate Street Trees for Primary Streets, and Table 23: Required Street Trees for Nonprimary Streets, are based on the trees’ ability to grow well in Ukiah’s climate, withstand the street tree setting and the following design principles:
A. Street trees, by virtue of a narrow tree trunk, provide transparency at the pedestrian’s eye level, permitting a visual grasp of extensive areas of a city.
B. The type, spacing, structure, and pattern of street trees create a discrete rhythm that results from the arrangement of trees, expressing the particular site.
C. Street trees create a smaller scale of space with their canopies that is sympathetic to the movement and perception of pedestrians.
D. The diversity of individual trees is subordinate to the repetitive pattern of the whole, which unifies the individual parts into a single whole.
E. Street trees, when formed from a single species, can create a homogeneity of texture, pattern, light and shade, resulting in a collective impact that is more important than the individual trees.
F. The ground surface is visually unobstructed to permit a clear visual expression of trees rising out of the ground.
G. Street trees provide a buffer between the pedestrian and vehicle travel/parking lanes, creating an enhanced sense of safety. (Ord. 1139, §2 (Exh. A, 10.050), adopted 2012)
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