This Honolulu Ordinance requires that green roofs have a slope no greater than 20 percent, at least 2 inches of soil media, and at least 2 inches of drainage layer.
Policy Details:
Locale: City and County of Honolulu, Hawaii [West]
Climate zone: Zone 1A: Very Hot Humid
Jurisdiction: Municipality [>150K]
Policy Type(s): City Code
Citation:
Honolulu, Haw., Dep’t of Plan. & Permitting, Rules Relating to Water Quality § 20-3-61(a)(1) (July 2024).
