ROH §21-4.70
Landscaping and screening rules for parking, trash, and rooftop equipment
Read the official text at honolulu.gov ↗This section requires landscaping or screening for parking lots, trash areas, utility substations, and rooftop machinery in most zoning districts. It sets minimum heights for screens and requires permanent irrigation. Some exceptions apply, such as for solar panels and certain industrial or low buildings.
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The ordinance, as written (Honolulu County) — Landscaping and screening
A copy, taken August 22, 2026. The version published by Honolulu is the one that governs, and it may have changed since. Check it before relying on anything here.
Parking lots, vehicle service stations, trash enclosures, and rooftop-mounted machinery must be landscaped or screened in all zoning districts as follows.
(a) Parking lots and structures must be landscaped as required in Article 6 .
(b) All outdoor trash storage areas, except those for single-unit, two-unit, or duplex-unit dwelling use, must be screened on a minimum of three sides by a wall or hedge at least 6 feet in height. The wall must be painted, surfaced, or otherwise treated to blend with the development it serves. All trash storage areas must be curbed or graded to prevent runoff from reaching storm drains or surface water.
(c) Within the country, residential, apartment, apartment mixed-use, and resort zoning districts, utility substations, other than individual transformers, must be enclosed by a solid wall or a fence with a screening hedge a minimum of 5 feet in height, except for necessary openings for access. Transformer vaults for underground utilities and similar uses must be enclosed by a landscape hedge, except for access openings.
(d) All plant material and landscaping must be provided with a permanent irrigation system.
(e) All rooftop machinery and equipment, except for solar panels, antennas, plumbing vent pipes, ventilators, and guardrails, must be screened from view from all directions, including from above; provided that screening from above is not required for any machinery or equipment whose function would be impaired by the screening. Rooftop machinery and equipment in the industrial zoning districts, and on structures or portions of structures less than 150 feet in height will be exempt from this subsection.
Published by the City and County of Honolulu through American Legal Publishing.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.