Honolulu limits carports and detached garages to maximum horizontal dimensions of 20 by 20 feet under ROH Sec. 21-2.140-1, with hillside Type V-B carports allowed to exceed one story under specified conditions.
ROH Sec. 21-2.140-1 sets dimensional rules for carports and detached private garages islandwide. The maximum horizontal footprint is 20 feet by 20 feet per structure. A carport of Type V-B construction on a hillside lot may exceed one story when conditions in the section are met, accommodating Oahu's steep terrain. Carports remain subject to yard and street setback rules in Sec. 21-4.30 and overall height limits in Sec. 21-4.60. Building permits under Chapter 18 are generally required for new carports.
Oversized carports, encroachment into required yards, or construction without a permit can result in notices of violation, fines, and required modifications.
Honolulu County, HI
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See how Honolulu County's carport rules rules stack up against other locations.
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