Urban Honolulu, HI Tree Protection: Tree Ordinances (2026)

Honolulu operates one of Hawaii's most established tree protection programs. Under ROH Chapter 41, the Exceptional Tree Ordinance designates individual trees or stands as Exceptional Trees based on size, age, rarity, aesthetic value, cultural significance, or historical importance. Once designated, these trees are protected regardless of whether they are on public or private property. The Arborist Advisory Committee recommends designations to the City Council, which formally designates trees by resolution. Trimming, relocation, or destruction of an Exceptional Tree requires a permit from the Department of Parks and Recreation (DPR), Division of Urban Forestry, and violation can result in fines and mandatory replacement. At the state level, HRS Chapter 58 supports the local program with tax benefits for Exceptional Tree owners, including expense deductions of up to 3,000 dollars every three years for qualified tree care work performed by certified arborists. Other trees on private property not designated as Exceptional are generally the property owner's to manage, but tree work within public rights-of-way, on City property, or in parks requires DPR approval. Tree damage during construction is a significant concern — construction within the drip line of an Exceptional Tree requires special protection measures. Root and canopy encroachment across property lines is handled under common law principles recognized in Hawaii courts. Coastal and scenic view protections under HRS 205A may apply in SMA areas. Street trees in residential neighborhoods are typically maintained by the City.