Tree Definitions 20250407 — File 25-0737

Somerville Zoning Ordinance Date Printed: 7/12/2023 1 2.1.1 General a. The following words, phrases, and terms in this Ordinance are defined in this Section. (Ord. 2024-13, 11/26/2024; Ord. 2024-14, 11/26/2024; Ord. 2024-15, 12/12/2024) Ord. 2024-15 effective February 1, 2025. Large Tree A woody plant tree with an expected mature height of thirty (30) feet or more and a mature width of twenty (20) feet or more. Small Tree A woody plant tree with an expected mature height of less than thirty (30) feet or a mature width of less than twenty (20) feet.

Somerville Zoning Ordinance Date Printed: 7/12/2023 1 10.4.5 Calculation Table 10.4.1 Green Score Calculation Credit Multiplier Soils Landscaped area with a soil depth < 24 inches actual sf 0.3 Landscaped area with a soil depth => 24 inches actual sf 0.6 Pervious Paving with 6 to 24 inches of subsurface soil or gravel actual sf 0.2 Pervious Paving with more than 24 inches of subsurface soil or gravel actual sf 0.5 Groundcovers Turfgrass, mulch, and inorganic surfacing materials actual sf 0.1 Plants Vegetation less than two (2) feet tall at maturity actual sf 0.2 Vegetation at least two (2) feet tall at maturity 12 sf/plant 0.3 Trees Small tree or columnar tree 50 sf/tree 0.6 Large tree 450 sf/tree 0.6 Preserved Tree 65 sf/tree 0.8 Engineered Landscape Vegetated Wall actual sf 0.1 Rain gardens, bioswales, and storm water planters. actual sf 1.0 Vegetated Roof with up to 6” of growth medium (under solar systems) actual sf 0.1 (0.3) Vegetated Roof with 6”-10” of growth medium (under solar systems) actual sf 0.4 (0.6) Vegetated Roof of 10”-24” growth medium (under solar systems) actual sf 0.6 (0.8) Vegetated Roof of over 24” growth medium – per individual landscape elements