Off-grid site report
Maui County, HI
20.8030, -156.3107 · 2,618 ft elevationRead this before you act on anything below. This is my researched starting point for Maui County, HI, not legal advice and not a guarantee. Rules change, and the deciding facts on any specific parcel (setbacks, perc results, overlay districts, deed restrictions, road frontage) live at the county or town office, not in any database. Before you buy land or build, confirm the current rules directly with the local zoning and health offices - the sources on this page tell you exactly who to call.
The local rulesMaui County, HI
Zoning & raw-land occupancy
Varies locallyMaui County applies one countywide zoning code (Title 19) within State Land Use Commission districts (Urban/Rural/Agricultural/Conservation); allowed uses depend entirely on the parcel's district, per the county. source
Dwellings, tiny homes & RVs
RestrictedAccessory dwellings ('ohana') and mobile/trailer homes are permitted only in districts that allow them, following standard zoning and setback rules set by the county; full-time RV or non-foundation tiny home occupancy outside licensed parks is not confirmed as lawful. source
Building permits & codes
RestrictedMaui County's Development Services Administration requires building permits and enforces its own adopted version of the International Residential Code with state and county amendments. source
Septic & composting toilets
Generally allowedSeptic and composting/incinerator toilets are permitted under Hawaii Department of Health's Individual Wastewater System program (state-run, not county); composting toilets alone don't cover kitchen/shower wastewater. source
Greywater reuse
Unclear - verifyA state-affiliated technical report says greywater reuse is not currently permitted in Maui County without a full treatment system, but county water conservation rules exempt greywater irrigation from watering restrictions; confirm directly with DOH and County Water Supply before installing.
Rainwater harvesting
Generally allowedRainwater catchment is permitted and even referenced as an exempt water source in county conservation rules, though Maui County's water code disclaims responsibility for catchment water quality. source
Private wells & water rights
Generally allowedPrivate wells are regulated at the state level by DLNR's Commission on Water Resource Management under the State Water Code; no distinct Maui County well permit was found. source
Living disconnected from utilities
Unclear - verifyNo Maui County ordinance explicitly bans or authorizes full off-grid utility disconnection; legality depends on separately meeting zoning, building/Certificate of Occupancy, wastewater, and water-source rules, case-by-case with Planning and DSA.
Sun30-year normals
- Peak-sun hours, annual average
- 5.8 hrs/day
- Worst month (sizes an off-grid array)
- 5.2 hrs/day
- Yearly output per 1 kW of panels
- 1,645 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 23 in/yr
- Snowfall
- 0 in/yr
- Heating degree days
- 666 (mild)
How far help isstraight-line
- Hospital
Kula Hospital - 7.6 mi
- Fire station
Makawao Fire Station - 2.6 mi
- Hardware store
True Value - 2.1 mi
- Grocery
Foodland - 3.2 mi
From OpenStreetMap. Road miles will be longer, often much longer in hill country.
Plan this spot
These open with this location's real numbers already filled in (ZIP 96768).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Maui County, HI?The rules above are the jurisdiction. The land check runs the parcel itself: flood zone, soils and septic suitability, wetlands, slope, access, climate, and these verdicts, from a parcel number or coordinates.
Check a parcel →Share or save this report:New report
Sources: US Census Bureau geocoder; NLR PVWatts v8 (solar); NOAA NCEI 1991-2020 climate normals (nearest station) or Open-Meteo (ZIP-centroid) for weather; Open-Elevation; OpenStreetMap contributors. Public data retrieved Aug 22, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.
New here, or not sure where this fits? Start here walks through the whole thing in order.