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Chapter 2ݤ9229 TREE PRESERVATION AND PLANTING REQUIREMENTS

§9229.5 STREET TREE DESIGN PRINCIPLES

Ukiah Zoning Code · 2026-07 edition · updated 2026-07-07 · Ukiah

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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▸ Contents — Ukiah Zoning Code
Ukiah Zoning Code
  1. Chapter 2
  2. ▸ Chapter 2
    Overview
    1. §9055 PURPOSE AND INTENT
    2. §9056 PURPOSE AND INTENT
    3. §9057 PURPOSE AND INTENT
    4. §9058 PURPOSE
    5. §9067.5 LOT COVERAGE
    6. §9135 PURPOSE AND INTENT
    7. §9170 PURPOSE AND INTENT
    8. §9174 PURPOSE
    9. §9220 PURPOSE
    10. §9221 APPLICABILITY
    11. §9222 ZONING
    12. §9223 BUILDING AND SITE USES
    13. §9224 STANDARDS FOR SPECIFIC LAND USES
    14. §9225 SITE AND BUILDING DEVELOPMENT STANDARDS
    15. §9227 HISTORICAL BUILDING STANDARDS
    16. §9228.1 PARKING REQUIRED
    17. §9228.2 NUMBER OF PARKING SPACES REQUIRED
    18. §9228.3 REDUCTION OF REQUIRED VEHICLE PARKING
    19. §9228.4 EXCESS PARKING
    20. §9228.5 LOCATION OF REQUIRED VEHICLE PARKING
    21. §9228.6 PARKING STALLS AND DRIVE AISLES
    22. ▸ §9229 TREE PRESERVATION AND PLANTING REQUIREMENTS
      Overview
      1. §9229.1 PURPOSE
      2. §9229.2 APPLICABILITY
      3. §9229.3 TREE PRESERVATION
      4. §9229.4 PLANTING REQUIREMENTS
      5. §9229.5 STREET TREE DESIGN PRINCIPLES
      6. §9229.6 USE OF ALTERNATE TREE SPECIES
      7. §9229.7 REQUIRED STREET TREES
      8. §9229.8 ALTERNATE STREET TREES FOR PRIMARY STREETS
      9. §9229.9 REQUIRED STREET TREES FOR NONPRIMARY STREETS
      10. §9229.10 REQUIRED PARKING LOT TREES
      11. §9229.11 ALTERNATE PARKING LOT TREES
      12. §9229.12 REQUIRED RIPARIAN TREES
    23. §9230 CIRCULATION STANDARDS
    24. §9231 ADMINISTRATION AND PROCEDURES
    25. §9232 GLOSSARY

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