9-402.050 - REQUIRED TREES

(a)

On-Site Trees. To provide cooling and improve air quality, trees must be provided as follows:

(1)

Residential Zones. One tree for every 5,000 square feet of lot area for residential development. The Zoning Administrator may grant a reduction to this ratio.

(2)

Commercial Zones. One tree for every 2,000 square feet of lot area.

(3)

Public Facilities, Mixed-Use and Airport Zones. One tree for every 2,500 square feet of lot area.

(4)

Industrial Zones. One tree for every 5,000 square feet of lot area with none required for the I-G and I-T zones.

(5)

Agricultural Zones. None.

(6)

Off-Site Planting. If the lot size or other site conditions make planting of the required trees impractical, the Zoning Administrator may allow the required trees to be planted off-site at twice the required ratio.

(7)

Exception for Existing Trees. If the required number and size of trees already exists on the site, the applicant shall not be required to plant new trees on-site.

(b)

Street Trees. All development in the Residential and Commercial zones must provide at least one street tree for each 60 linear foot of street frontage or one per lot frontage unless the Zoning Administrator determines that a different number of trees is warranted because of existing conditions and/or the number of street trees in the vicinity.

(1)

Spacing. Trees shall be spaced at a maximum of 60-foot intervals or a minimum of one tree per lot frontage.

(2)

Corner Lots. For corner lots, street trees shall be required on both street frontages.

(3)

Size. Trees shall be at least 15 gallons in size or 1½ inches in diameter at breast height.

(4)

Location from Driveways. Trees shall be located a minimum of ten feet from driveways.

(5)

Location from Rights-of-Way. Trees shall be located a minimum of four feet and a maximum of ten feet outside of the road right-of-way.

(6)

Street Frontages. Street trees shall be required along frontages where noise attenuation walls are required. They shall be placed in the yard or integrated with a serpentine wall.

(7)

Type. The types of trees shall be well suited to the climate of the region and as approved by the County.

(8)

Timing of Installation. Required street trees, including irrigation systems, shall be completely installed prior to the final inspection of the building or site, if no buildings are proposed.

(c)

Maintenance. All trees must be maintained to be free from physical damage or injury arising from lack of water, chemical damage, accidents, vandalism, insects, and disease. Any tree showing such damage to the extent that its life would be impaired must be replaced with another tree.

(Ord. No. 4671, § 26, 5-13-2025)

9-402.060 - REQUIRED LANDSCAPE PLANS AND SUPPORTING MATERIALS

(a)

General Requirements. Documentation must be provided to the Zoning Administrator on the forms required by the MWELO for all non-exempt landscape projects. Streamlined submittals are available for:

(1)

Small Sites. A project with a landscape area of 2,500 square feet or less that complies with the prescriptive measures listed in subsection (h), below, is exempt from certain submittal requirements for the MWELO Landscape Documentation Package.

(2)

Graywater or Rainwater Projects. A project that meets the lot or site's landscape water requirement entirely with treated or untreated graywater or through stored rainwater captured on site is subject only to certain requirements.

(3)

Existing Landscape. All existing landscape over one acre in size may be required to have an irrigation audit if a property owner proposes an expansion of floor area that is more than 10 percent of existing floor area or structural alterations that exceed 10 percent of the replacement cost of the building. Restrictions on overspray and runoff may be imposed as conditions of approval of a discretionary permit in order to conserve water.

(b)

Landscape Documentation Package. A Landscape Documentation Package meeting the requirements of the MWELO must be submitted to the Zoning Administrator by the project applicant for review and approval prior to start of construction.

(c)

Prescriptive Compliance Option for Smaller Sites. Landscape projects that involve 2,500 square feet or less of landscape area may be approved through a Zoning Compliance Review if the applicant meets all of the following requirements. Under this procedure, Landscape Documentation requirements of the MWELO are waived.

(1)

Submit a Prescriptive Compliance Form or Performance Checklist providing the required MWELO information.

(2)

At the time of final inspection of a smaller site, provide the owner of the property with a Certificate of Completion, Certificate of Installation, Irrigation Schedule, and a Schedule of Landscape and Irrigation Maintenance.