Kapolei's Landscaping Rules: The Rules That Matter

Every city handles landscaping rules a little differently. In Kapolei, Hawaii, there are 9 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Water Restrictions

Kapolei outdoor water use is regulated by ROH Chapter 30 and Board of Water Supply shortage stages that restrict irrigation during leeward droughts.

Key details: Code: ROH Sec. 30-2.3. Operational rules: BWS shortage stages 1-4. Non-potable source: Honouliuli recycled water. Context: Leeward drought priority.

BWS can issue warnings and escalating penalties during declared shortages. Repeat or commercial-scale Kapolei violations may lead to flow restrictors or service cuts.

Tree Trimming

Kapolei homeowners and businesses need an Urban Forestry permit before trimming street trees along Kapolei Parkway and commercial districts under ROH Sec. 10-1.4.

Key details: Code: ROH Sec. 10-1.4. Permit issuer: Parks and Recreation Urban Forestry. Scope: Public right-of-way trees. Main corridor: Kapolei Parkway.

Unpermitted trimming can lead to citation, arborist-assessed damage claims, and replanting orders. Commercial violators near Ka Makana Alii face larger restitution.

Native Plants

Kapolei landscape designs may substitute native Hawaiian species for standard street trees under LUO Sec. 21-4.70; no mandatory native-only rule applies.

Key details: Code: LUO Sec. 21-4.70. Mandate: None for natives. Climate fit: Leeward drought palette. Guidance: BWS Xeriscape Program.

No penalties apply for voluntary native landscaping. Commercial Kapolei projects that miss LUO Sec. 21-4.70 landscape area minimums can face permit denial.

If you are coming from a city with tighter rules, you will find Kapolei gives residents more flexibility on native plants.

Grass Height Limits

Kapolei residents and commercial landowners must keep vegetation from becoming a public nuisance under ROH Chapter 16A, especially near Second City corridors.

Key details: Code: ROH Chapter 16A, Article 2. Compliance window: 30 days after notice. Enforcement: Planning and Permitting. Focus: Second City corridors.

DPP issues a written notice. After 30 days without compliance, the city may enter, cut vegetation on the Kapolei property, and bill abatement costs as a lien.

Composting

Kapolei households and food businesses follow ROH Sec. 42-3.5 food waste recycling, including the G.R.O.W. curbside program under Ordinance 23-30.

Key details: Code: ROH Sec. 42-3.5. Curbside program: G.R.O.W. food scraps. Effective: Phased from April 2025. Setout rule: ROH Sec. 42-1.4.

Improper Kapolei cart setout or contaminated green carts may draw warning tags and fines. Commercial food operators face escalating penalties for failing diversion.

Weed Ordinances

Kapolei vacant and partially developed parcels must control weeds under ROH Sec. 16A-2.1 et seq., with a 30-day notice before city abatement.

Key details: Code: ROH Sec. 16A-2.1 et seq.. Notice: 30-day written compliance. Remedy: City abatement and lien. Local driver: Leeward fire risk.

After 30 days of noncompliance, the city may clear the Kapolei lot and charge all abatement costs. Unpaid charges attach as a lien on the property title.

Tree Removal & Heritage Trees

Removing a designated exceptional tree in Kapolei requires a Parks and Recreation permit under ROH Chapter 40, Article 8.

Key details: Code: ROH Secs. 40-8.1 to 40-8.9. Register: ROH Sec. 40-8.7. Emergencies: ROH Sec. 40-8.9. State law: HRS Chapter 58.

Unpermitted Kapolei removal of an exceptional tree can trigger misdemeanor charges, mitigation planting, and restitution based on arborist replacement value.

Compared to other cities, Kapolei takes a harder line on tree removal & heritage trees. The enforcement and penalty structure reflects that.

Rainwater Harvesting

Kapolei residents may install residential rain barrels without a Honolulu ordinance permit; small catchment up to 360 gallons is exempt under state plumbing code.

Key details: City code: No specific ordinance. Plumbing code: Up to 360 gallons exempt. Incentive: BWS rebate programs. Climate fit: Dry leeward offset.

No ordinance penalties apply for compliant catchment. Larger commercial Kapolei cistern systems may need plumbing plan review if they exceed code exemptions.

If you are coming from a city with tighter rules, you will find Kapolei gives residents more flexibility on rainwater harvesting.

Artificial Turf

Kapolei has no specific Honolulu ordinance on artificial turf; LUO Sec. 21-4.70 governs whether synthetic turf counts toward required landscape area.

Key details: City code: No specific turf rule. LUO landscape: Sec. 21-4.70 applies. Heat issue: Second City sun exposure. HOA layer: Design review common.

No ordinance penalties apply to private Kapolei turf use. Commercial projects can be denied permits if LUO landscape area minimums are not otherwise satisfied.

The rules around artificial turf in Kapolei lean permissive, but that does not mean anything goes.

The Bottom Line

Compared to many U.S. cities, Kapolei gives residents more room on landscaping rules. 3 of the 9 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

These rules come from Kapolei's publicly available municipal code. For complete penalty schedules, exemption details, and answers to common questions, see the individual ordinance pages throughout this guide.