Honolulu Zoning Districts Explained: From R-3.5 Residential to BMX Mixed-Use
Honolulu's zoning map uses a district code system that is compact but not self-explanatory. Every compliance calculation — setbacks, height, lot coverage, permitted uses — starts with correctly identifying the zoning district. This guide explains the major district categories, what each allows, and how to read and verify a parcel's designation.
How zoning districts work in Honolulu
The Land Use Ordinance (ROH Chapter 21) establishes zoning districts for the City and County of Honolulu, which covers the entire island of Oahu. Each district designation carries a set of regulations: permitted uses (what can be built there), dimensional standards (setbacks, height, lot coverage, FAR), and development standards (parking, landscaping, signs).
The zoning designation for a specific parcel is determined by the Official Zoning Map, maintained by DPP. The map is the controlling document — not the district name or a general description. A parcel may be zoned R-5 on a block where most surrounding parcels are R-7.5, and its standards are those of R-5, regardless of what neighbors are subject to.
How to verify a parcel's zoning:Look up the TMK number in DPP's online permit portal or the City's Property Information Portal. The zoning designation shown in those systems reflects the current Official Zoning Map. For projects with any complexity, also verify whether any conditional zoning, development agreement, or special district overlay applies.
District reference by category
Representative values — verify against current adopted ROH Chapter 21 for each specific district.
Residential (R)
| Code | Min lot | Max height | Notes |
|---|---|---|---|
| R-3.5 | 3,500 sq ft | 25 ft or 2.5 stories | Most compact urban residential. Common in established Honolulu neighborhoods. |
| R-5 | 5,000 sq ft | 25 ft or 2.5 stories | Standard single-family residential throughout much of Oahu. |
| R-7.5 | 7,500 sq ft | 25 ft or 2.5 stories | Suburban residential, typically found in hillside and planned neighborhoods. |
| R-10 | 10,000 sq ft | 25 ft or 2.5 stories | |
| R-20 | 20,000 sq ft | 25 ft or 2.5 stories | Estate residential, low density. |
Apartment (A)
| Code | Min lot | Max height | Notes |
|---|---|---|---|
| A-1 | 5,000 sq ft | 60 ft / 6 stories | Low-rise multi-family. Townhomes, small apartment buildings. |
| A-2 | 5,000 sq ft | 150 ft / 15 stories | Mid-rise residential. Common in urban core neighborhoods. |
| A-3 | 5,000 sq ft | 350 ft / 45 stories | High-rise. Downtown Honolulu, Kakaako corridor. |
Business (B)
| Code | Min lot | Max height | Notes |
|---|---|---|---|
| B-1 | 3,500 sq ft | 45 ft | Neighborhood-scale commercial. Ground-floor retail with residential above. |
| B-2 | 3,500 sq ft | 60 ft | Larger commercial uses, strip centers, professional offices. |
| B-3 | 3,500 sq ft | Varies | Broader commercial uses, auto-oriented. |
Business Mixed-Use (BMX)
| Code | Min lot | Max height | Notes |
|---|---|---|---|
| BMX-3 | None specified | 45 ft | Mid-scale mixed-use. Encourages ground-floor retail with residential above. Zero setbacks common. |
Special districts and overlays
In addition to base zoning districts, some areas of Honolulu are subject to special district regulations that layer additional requirements on top of the base district rules. Special districts take precedence over base district rules where there is a conflict. Major special districts include:
- Kakaako (HCDA jurisdiction). The Hawaii Community Development Authority (HCDA) has jurisdiction over most of Kakaako. Development in this area is governed by HCDA rules, not DPP's LUO, for most matters. Projects in Kakaako should be reviewed against HCDA rules first.
- Special Management Area (SMA). Not a zoning district, but an overlay that applies within approximately 300 feet of the shoreline. SMA permit requirements apply in addition to the base zoning requirements.
- Historic districts. Some neighborhoods have Historic District overlays that impose design review requirements on exterior alterations. DPP's Historic Preservation Division reviews projects in these areas.
- Flood zones. FEMA flood zone designations affect construction requirements (elevation, flood-proofing) independently of zoning. A parcel in AE flood zone has both its base zoning regulations and the flood zone construction requirements to satisfy.
The most common zoning district errors in plan submissions
- Wrong district cited in general notes. A parcel along a transitional boundary may be zoned differently than its immediate neighbors. Always verify the TMK against the Official Zoning Map.
- Applying residential rules to a BMX project. BMX districts have different setback, height, and use rules than R districts. A design that complies with R-5 standards may not comply with BMX-3 standards, and vice versa.
- Missing HCDA review for Kakaako projects. Projects submitted to DPP for parcels within HCDA's jurisdiction may be returned — DPP does not have jurisdiction for some approvals in that area.
- Not checking for conditional zoning. A parcel with conditional zoning has requirements beyond those of the base district. These conditions appear in the property's permit history and should be identified before starting design.
Parcel-aware compliance checking for your project.
Ikena Permit looks up your parcel's actual zoning designation and runs your plan set against the right district rules — not generic defaults. Citation-anchored results in about 30 minutes.
Request early access →Published by Ikena Permit, a DBA of Ikena Design & Build LLC, Honolulu, HI. Informational only. Verify all district regulations against the current Official Zoning Map and adopted ROH Chapter 21. Last reviewed May 2026.