Hawaii has explicit statutory disclosure requirements for aircraft noise — triggered both by commercial airport noise contour maps and by military installation designations. In a real estate market characterized by high property values and buyers often unfamiliar with local flight patterns, Hawaii realtors carry meaningful legal obligations when transacting near any of the state’s airports.
The Law: Hawaii’s Seller’s Real Property Disclosure Statement
Hawaii requires sellers to complete the Hawaii Seller’s Real Property Disclosure Statement — and notably, real estate agents are not permitted to help sellers fill out this form. The obligation is on the seller directly.
Hawaii law requires disclosure of airport proximity under two circumstances:
1. FAR Part 150 Airport Noise Contour Maps: Disclosure is required when residential property is within the boundaries of a noise exposure area shown on maps prepared by the Hawaii Department of Transportation (DOT) in accordance with FAR Part 150 — Airport Noise Compatibility Planning for any public airport. These maps reflect the FAA’s standard noise contour program.
2. Air Installation Compatible Use Zones (AICUZ): Disclosure is also required when residential real property lies within the boundaries of an Air Installation Compatible Use Zone (AICUZ) of any Air Force, Army, Navy, or Marine Corps airport as officially designated by military authorities — subject to the availability of maps that designate the area.
Given Hawaii’s significant military presence — Pearl Harbor-Hickam, Marine Corps Base Hawaii, Schofield Barracks, and others — the AICUZ provision creates disclosure obligations that affect a substantial portion of Oahu’s residential market.
Key law references:
- Hawaii Seller’s Real Property Disclosure Statement — Statutory form
- FAR Part 150 — Airport Noise Compatibility Planning maps (DOT Hawaii)
- AICUZ designations — U.S. military airport compatibility zones
Hawaii’s Unique Noise Environment
Hawaii’s island geography creates a distinctive aircraft noise landscape:
- Limited flight path options. Island airports have fewer runway orientation alternatives than mainland airports. Departures and arrivals are often channeled over the same residential corridors repeatedly.
- Military and civilian co-location. Honolulu’s Daniel K. Inouye International Airport (HNL) operates adjacent to Hickam Air Force Base (now Joint Base Pearl Harbor-Hickam). Military operations generate noise profiles separate from commercial aviation — and trigger different disclosure thresholds.
- Helicopter tourism. The helicopter tour industry generates concentrated, low-altitude noise over neighborhoods on Maui, Kauai, and the Big Island that is largely absent from standard FAR Part 150 noise maps. This is a material fact issue that goes beyond the statutory disclosure form.
- High property values amplify impact. At an NDI of 0.6%–1.0% per decibel, a $1.2 million Honolulu home exposed to 8 extra decibels carries an estimated $57,600–$96,000 noise discount.
Major Hawaii Airports and Military Installations
| Airport / Installation | Island | Key Consideration |
|---|---|---|
| HNL (Daniel K. Inouye International) | Oahu | Commercial hub adjacent to Joint Base Pearl Harbor-Hickam; dual noise sources |
| Joint Base Pearl Harbor-Hickam | Oahu | Active military flight operations; AICUZ maps govern disclosure |
| Marine Corps Base Hawaii (Kaneohe Bay) | Oahu | Active operations; AICUZ designation for nearby residential areas |
| OGG (Kahului) | Maui | Major inter-island hub; helicopter tour traffic concentrated over residential areas |
| KOA (Ellison Onizuka Kona) | Big Island | Resort market; flight paths over coastal residential areas |
| ITO (Hilo International) | Big Island | Windward side; different flight path exposure than KOA |
| LIH (Lihue) | Kauai | Resort/residential market; helicopter tour concentration |
Practical Checklist for Hawaii Realtors
Before listing or making an offer within relevant distance of any Hawaii airport or military installation:
- Seller fills out the disclosure form — not the agent. Hawaii law specifically prohibits real estate agents from assisting sellers in completing the disclosure form. Ensure sellers understand this requirement.
- Check Hawaii DOT FAR Part 150 noise contour maps for the relevant airport. The Hawaii DOT maintains these maps. Determine whether the property falls within any mapped noise exposure area.
- AICUZ maps for military installations: Verify current AICUZ designations for Joint Base Pearl Harbor-Hickam, Marine Corps Base Hawaii, and other active military facilities on each island. If the property is within a designated AICUZ, disclosure is required.
- Oahu transactions near Hickam/Pearl Harbor: Both commercial and military noise sources may affect the same property. Check both FAR Part 150 maps and AICUZ designations independently.
- Maui and Kauai helicopter traffic: Helicopter tour operations generate concentrated noise that is not reflected in standard airport noise maps. For properties under known helicopter corridors, consider whether the volume of helicopter overflights constitutes a material fact beyond the statutory disclosure.
- Resort market buyer counseling: Many Hawaii buyers are purchasing vacation or investment properties and may not be on-site during routine noise hours. An explicit noise profile conversation — including the FAR Part 150 map findings — is part of informed representation.
- Use aircraftnoisereport.com to generate property-level noise exposure data, particularly valuable in Hawaii’s complex multi-airport, multi-military environment.
- Document all disclosure steps in the transaction file — which maps were checked, what data was found, what was communicated.
The High-Value Market Calculus
Hawaii’s real estate market is among the highest-value in the nation. At the documented NDI range of 0.6%–1.0% per decibel, noise discounts translate into very large absolute dollar figures. A $1.5 million Oahu home in a 10 dB above-background noise corridor could carry a $90,000–$150,000 noise discount that simply never appears in the standard disclosure form’s “yes/no” framework.
For high-net-worth buyers, the implicit noise pricing calculation is real — and increasingly sophisticated buyers are doing it themselves. Realtors who surface this data proactively are delivering services commensurate with the transaction size.
Get a Property-Level Aircraft Noise Report
Before your next Hawaii transaction near an airport or military installation, run a report at aircraftnoisereport.com. Property-level noise exposure data that goes beyond what FAR Part 150 contour maps and AICUZ boundaries show.
This post is for informational purposes only and does not constitute legal advice. Consult a licensed Hawaii real estate attorney for guidance on specific disclosure obligations.