Honolulu LUO · Residential
What is R-3.5 zoning in Hawaii?
The most compact single-family residential district in the City & County of Honolulu. R-3.5 allows smaller lots and is common in older, denser Honolulu neighborhoods near the urban core.
Code
R-3.5
Category
Residential
Min. lot size
3,500 sq ft
Jurisdiction
Honolulu (Oʻahu)
What you can build in R-3.5
- Single-family detached dwellings (one per lot, subject to density rules)
- Accessory Dwelling Units (ADUs) on qualifying lots — confirm eligibility with DPP
- Customary residential accessory uses (garages, ʻohana under specific conditions)
Check the zoning on a specific property
Zoning is assigned parcel by parcel. To see the district, lot size, and land details for any Hawaii property, look it up by its Tax Map Key (TMK).
Look up a parcel by TMK →This is a plain-English overview, not legal or zoning advice. Districts, permitted uses, and minimum lot sizes change and vary by county. Always confirm the current rules for a specific parcel with the relevant county planning department (on Oʻahu, the Department of Planning & Permitting) before relying on them.