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Home My WebLink AboutTR_Tree_Retention_Worksheet_250507_v1rentonwa.gov/permitcenter | planningcustomerservice@rentonwa.gov | 425-430-7294 10/6/2022 Page 1 of 3 CITY OF RENTON Ι PERMIT CENTER TREE RETENTION AND CREDIT WORKSHEET TREE RETENTION REQUIREMENTS A minimum retention of thirty percent (30%) of all significant trees (as defined in RMC 4-11-200) is required on site. Please complete the form below to verify compliance with minimum tree retention requirements. • Identify total number of trees 6-inch caliper or greater (or alder or cottonwood trees 8-inch caliper or greater) on site: Trees Trees Trees Trees Trees Trees Required Trees Proposed •Deductions – Certain trees are excluded from the retention calculation: o Trees that are high-risk, as defined in RMC 4-11-200: o Trees within existing and proposed public right-of-way: o Trees within wetlands, streams, very high landslide hazards, protected slopes, and associated buffers: •Total remaining trees after deductions: •Required tree retention (30%): •Identify number of trees proposed for retention: •Identify number of trees requested for replacement in lieu of retention (skip page 3 if no tree replacement is requested):Trees TREE CREDIT REQUIREMENTS Tree credit requirements apply at a minimum rate of thirty (30) credits per net acre. Complete the form below to determine minimum tree credit requirements. •Gross area of property in square feet: Square Feet •Deductions: Certain areas are excluded from tree credit calculation: o Existing and proposed public right-of-way: Square Feet o Wetlands, streams, very high landslide hazards, protected slopes, and associated buffers: Square Feet •Total excluded area:Square Feet •Net land area (after deductions) in square feet:Square Feet •Net land area (after deductions) in acres:Acres •Required tree credits:Tree Credits Required rentonwa.gov/permitcenter | planningcustomerservice@rentonwa.gov | 425-430-7294 10/6/2022 Page 2 of 3 TREE RETENTION AND CREDIT WORKSHEET PROPOSED TREE CREDITS Please complete the table below to calculate the total tree credits proposed for your project. Identify the quantity of trees for each tree category, after deducting trees within excluded areas, as shown in the previous section. TREE SIZE TREE CREDITS TREE QUANTITY TOTAL TREE CREDITS RETAINED TREES Preserved tree 6 – 9” caliper 4 Preserved tree 10 – 12” caliper 5 Preserved tree 12 – 15” caliper 6 Preserved tree 16 – 18” caliper 7 Preserved tree 19 – 21” caliper 8 Preserved tree 22 – 24” caliper 9 Preserved tree 25 – 28” caliper 10 Preserved tree 29 – 32” caliper 11 Preserved tree 33 – 36” caliper 12 Preserved tree 37” caliper and greater 13 NEW TREES New small species tree (30' or less at maturity) 0.25 New medium species tree (30' to 50' at maturity) 1 New large species tree (50' or more at maturity) 2 TREE CREDITS PROPOSED: rentonwa.gov/permitcenter | planningcustomerservice@rentonwa.gov | 425-430-7294 10/6/2022 Page 3 of 3 TREE RETENTION AND CREDIT WORKSHEET TREE REPLACEMENT JUSTIFICATION Replacement may be authorized as an alternative to 30% retention provided the removal is the minimum necessary to accomplish the desired purpose and provided the proposal meets one of the following options: a. There are special circumstances related to the size, shape, topography, location, or surroundings of the subject property; or b. The strict application of the code would prevent reasonable use of property; or c. The strict application of the code would prevent compliance with minimum density requirements of the zone; or d. The project is a short plat with four (4) or fewer lots. Please attach a written justification demonstrating compliance with the requirements and criteria as descripted above. TREE REPLACEMENT QUANTITY Tree replacement quantity is determined based on the credit value of the trees proposed for removal. Larger, higher priority trees shall be used for calculation of tree replacement. Identify the quantity of each tree requested to be removed in lieu of 30% retention, based on tree size. List the identification number of each tree, as indicated in the arborist report. TREE SIZE TREE CREDITS TREE QUANTITY TREE INDENTIFICATION # TOTAL TREE CREDITS Tree 37” caliper + 13 Tree 33 – 36” caliper 12 Tree 29 – 32” caliper 11 Tree 25 – 28” caliper 10 Tree 22 – 24” caliper 9 Tree 19 – 21” caliper 8 Tree 16 – 18” caliper 7 Tree 12 – 15” caliper 6 Tree 10 – 12” caliper 5 Tree 6 – 9” caliper 4 REPLACEMENT CREDITS REQUIRED: TREE REPLACEMENT PLANTING Identify the quantity of proposed new replacement trees (minimum size of 2-inch caliper). The total replacement credits proposed should be equal to or greater than the replacement credits required, as shown in the previous section. TREE SIZE TREE CREDITS TREE QUANTITY TOTAL TREE CREDITS New small species tree (30' or less at maturity) 0.25 New medium species tree (30' to 50' at maturity) 1 New large species tree (50' or more at maturity) 2 REPLACEMENT CREDITS PROPOSED: May 7, 2025 Job No. 2328-001-022 Planning Division City of Renton 1055 South Grady Way, 6th Floor Renton, WA 98057 RE: Tree Retention Justification Memo Windsor Court Subdivision To Whom it May Concern: Please accept this memo as justification for alternative tree replacement in lieu of retaining 30% of existing trees for Windsor Court, a proposed 20-lot subdivision. Of the 57 healthy existing trees at the subject property, three (3) are proposed for retention. Three retained trees amount to just over 5% retention, which is less than the 30% required by code. Factors leading to shortfall in tree retention are as follows:  Healthy trees/root systems will be encroached by the required stormwater facility located at the low point of the site  Healthy trees/root systems will be encroached by the required 3’ dedication and right-of-way improvements along 108th Ave S, including the likely removal of an existing rockery that abuts a cluster of healthy conifers (City of Kent)  Healthy trees/root systems will be encroached by 53’ of required right-of-way with a 20’ emergency vehicle access (EVA) tract  Healthy trees/root systems will be encroached by the single-family residences and driveways o Maximum density is 14 DU/acre; proposed density is 11.4 DU/acre o Minimum lot size in R-14 is 3,000 ft2; average lot size is 3,238 ft2 and 12 of the 20 proposed lots are 3,007 ft2 or less While the subject property fronts two roads, access is limited to 108th Ave S because 107th Ave S is privately owned. R-14 is a mixed residential zone that supports multifamily developments. The intensity of development in higher density residential zones can conflict with tree retention strategies on infill sites like the subject property. Tree credits required to both meet minimum tree density and mitigate for insufficient retention amount to 184 credits total. While replacement plantings are proposed, there is insufficient space on site for all required plantings. Therefore, fee-in-lieu of $375 per replacement tree is proposed for a 93.75 credit shortfall. Planning Division Director May 7, 2025 Page 2 Please accept this alternative planting plan and justification in lieu of 30% tree retention. Do not hesitate to call or email if you have questions about or issues with the materials submitted. Thank you for your attention to this project. Sincerely, ESM CONSULTING ENGINEERS, LLC DAVID ALDRIDGE III SENIOR PLANNER \\esm8\engr\esm-jobs\2328\001\022\document\letter-002.docx