Building permits, zoning and land rules in Hawaii County, Hawaii

Yes. Hawaii County requires a permit before most construction, alteration, repair, relocation, conversion or demolition of a building or structure begins¹. Limited exemptions apply, and the Building Division guidelines identify fences 6 feet or less and qualifying like-for-like maintenance repairs valued at no more than $4,000 in any 12-month period⁸. Building-permit fees follow a published valuation schedule; plan review adds 20% of the permit fee, with a $50 minimum¹². Required work is inspected for code compliance¹. A certificate of occupancy is generally required before use or a change in occupancy classification, but Group R, Division 3 and Group U occupancies are not issued one under the cited county provision¹.

Hawaii County's Department of Public Works Building Division has a Hilo office at Aupuni Center, 101 Pauahi Street, Suite 7, (808) 961-8331, and a Kona office at West Hawaiʻi Civic Center, 74-5044 Ane Keohokālole Highway, Building E, 1st Floor, (808) 323-4720⁸. Counter assistance is available on weekdays beginning at 7:45 a.m., and applications and payments can go through Papa'aukahi⁸. The county's published process says approving agencies review applications accepted in Hilo or Kona, so applicants do not route them personally². Planning handles zoning, Special Management Area review and possible second-dwelling approvals, while Engineering reviews proposed improvements in FEMA-designated floodplains⁸.

Yes. Hawaii County regulates land through Chapter 25, with ordinary and special districts that include village, commercial, university, project and agricultural project districts^4,13. A parcel's district controls uses, building height, setbacks, parking, open space and the share of the lot that structures may occupy^2,9. The RS district has a 7,500-square-foot minimum building site and a 35-foot height limit, while the A agricultural district has a 5-acre minimum and a 35-foot residential height limit⁹. Accessory dwellings are permitted in RS, RD, RA, FA and A districts, subject to additional agricultural requirements where applicable and a final inspection before use⁹. We could not confirm a countywide minimum floor area for an ordinary dwelling; ask Planning about the parcel before designing a very small home⁸.

The Hawaii Department of Health Wastewater Branch, not Hawaii County, administers individual wastewater systems statewide^3,5. A dwelling without county sewer needs a system designed by a Hawaii-licensed civil engineer, and construction or modification requires state approval^6,8. The engineer must provide the state a final inspection report within 30 days after construction is complete⁶. Only 3% of Hawaii County soils are rated without severe limitations for a conventional drain field, so settle wastewater feasibility before fixing the house location¹⁴. Approved equipment includes septic tanks, aerobic units, certain passive aerobic systems and bioreactor gardens; composting or incinerator toilets handle toilet waste only, leaving shower and kitchen wastewater to be treated and disposed of separately⁵.

Hawaii County's residential code recognizes a tiny house as a single dwelling unit; Appendix Q limits it to 500 square feet or less excluding lofts, allows no more than one loft, and restricts a lofted tiny house to use as a detached single-family dwelling⁷. That definition does not waive building permits, zoning or wastewater approval^1,2,6. We could not confirm a countywide rule allowing temporary camping or RV residence on private land, so ask Planning about the parcel and proposed occupancy before relying on an RV during construction⁸. Camping in county parks is allowed only in designated areas, which does not answer private-land occupancy¹⁵. State law also limits nighttime vehicle habitation on public property and requires authorization for parking and habitation on private property¹⁶.

1. Ask Planning to confirm the parcel's zoning, Special Management Area status and any approval needed for an additional dwelling⁸.
2. For a site without sewer, have a Hawaii-licensed civil engineer design the individual wastewater system for state review^6,8.
3. Have Engineering review the proposal if the property is in a FEMA-designated floodplain; building, occupancy, grading, development and subdivision approvals in a special flood-hazard area receive floodplain review^8,17.
4. Address access: a driveway built within a county right-of-way needs a permit².
5. Submit plans through the Hilo or Kona Building Division or Papa'aukahi; county approving agencies route the review^2,8.
6. Complete required inspections before occupying the project, following the certificate rules that apply to its occupancy group¹.

Confirm the zoning classification rather than relying on a district list, because the published framework does not establish any particular parcel's zoning². If land will be divided, Hawaii County requires approval of subdivision plats and streets or ways created to partition land¹⁸. Check legal access and determine whether a proposed driveway enters a county or state right-of-way, since each can trigger a different permit^2,19. Review flood status early because permits, occupancy approvals and subdivision proposals in special flood-hazard areas are checked for floodplain compliance¹⁷. Test wastewater feasibility because only 3% of local soils are rated without severe limitations for a conventional drain field¹⁴. A new well or pump installation needs a Commission on Water Resource Management permit before work begins²⁰.