Fence Regulations in Honolulu, HI: What Residents Actually Need to Know

If you live in Honolulu or are thinking about moving there, fence regulations are one of those things you probably won't think about until they affect you directly. Honolulu has 4 specific rules on the books covering different aspects of fence regulations, and some of them might surprise you.

Permit Requirements

In Honolulu, fences six feet or under are generally exempt from building permits unless on a street corner or in a flood zone. Fences taller than six feet require a permit and fire-department access approval.

Key details: Permit-exempt height: 6 ft or under (with exceptions). Permit required above: 6 ft; also fire dept. approval. Retaining wall permit: Required over 30 inches. Prohibited materials: Barbed wire, razor wire.

Unpermitted fences over 6 feet may result in stop-work orders, mandatory removal, and fines; each day of continued violation is a separate offense under ROH § 16.

Height Limits

Honolulu's Land Use Ordinance limits residential fences to 6 feet in side and rear yards and 4 feet in front yards. Fences over 6 feet require a Department of Planning and Permitting building permit.

Key details: Side/rear yard max height: 6 feet (no permit). Front yard max height: 4 feet residential. Permit-free threshold: 30 inches or under. Permit required above: 6 feet. Enforcing agency: Dept. of Planning and Permitting.

Violations result in DPP notices, fines, and mandatory removal orders. Enforcement is complaint-driven through the code enforcement division.

Neighbor Fence Rules

Honolulu's Land Use Ordinance (ROH Chapter 21) limits fences and walls to 6 feet in required yards. Fences taller than 6 feet or new fences costing over $1,000 require a building permit; shared boundary-line fences involve mutual consent and state cost-sharing law.

Key details: Max fence height (yards): 6 feet. Permit threshold: Over 6 ft or cost over $1,000. Boundary-line consent: Written neighbor permission required. Shared-cost authority: HRS Chapter 664.

Unpermitted fences over 6 feet or over $1,000 cost may result in stop-work orders and civil fines under ROH Chapter 16; removal or correction may be ordered by DPP.

Material Restrictions

Honolulu regulates fence materials through its Building Code (ROH Chapter 16) and Land Use Ordinance (ROH Chapter 21). Fences up to 6 feet using permanent materials are generally permit-exempt. Barbed and razor wire are prohibited on most residential and commercial fences.

Key details: Permit-exempt height: 6 ft or less (not on corner/flood zone). Barbed/razor wire: Prohibited in residential zones. Utility fence max: 8 ft + security wire to 9 ft total. Agricultural fence max: 10 ft. Governing code: ROH Ch. 16 § 431.2; Ch. 21 § 21-4.30.

Unpermitted fences above height limits or using prohibited materials (e.g., barbed wire in residential zones) may result in stop-work orders, mandatory removal, and fines under ROH Chapter 16 enforcement.

The Bottom Line

Honolulu's fence regulations rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Honolulu is broadly strict or permissive.

Keep in mind that Honolulu can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.