Building Setbacks & Zoning in Honolulu County, HI (2026)

3 county-level rules, plus city-specific rules for 10 cities in Honolulu County, Hawaii.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Honolulu County. If you live within an incorporated city, that city's own rules apply — see the city list below.

Setback Rules

Honolulu County's LUO Section 21-4.30 sets front, side, and rear yard setbacks for every zoning district across Oahu, with companion residential standards in ROH 21-3.70-1.

ROH Sec. 21-4.30 Setback Rules

Heavy Restrictions

Full ordinance details →Official source ↗

Structure Height Limits

Honolulu County's LUO Section 21-4.60 sets maximum structure heights and building envelope plane rules, with residential districts capped at 25 to 30 feet under ROH 21-3.70-1.

ROH Sec. 21-4.60 Structure Heights

Heavy Restrictions

Full ordinance details →Official source ↗

Lot Coverage Limits

Honolulu County's LUO Section 21-3.70-1 caps impervious surface at 75 percent of lot area for residential dwellings permitted after May 1, 2019, to control runoff and preserve neighborhood character.