Off-grid site report
Humboldt County, CA
40.3401, -124.0023 · 558 ft elevationRead this before you act on anything below. This is my researched starting point for Humboldt County, CA, 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 rulesHumboldt County, CA
Zoning & raw-land occupancy
RestrictedHumboldt County Planning & Building Department sets minimum densities by zone, ranging from roughly one dwelling per 40 acres in some Timberland zones to denser Rural Residential and Community Planning Area designations depending on utility availability. Raw land occupancy isn't permitted by right; check your parcel's zoning first. source
Dwellings, tiny homes & RVs
RestrictedThe county's Modified Limited Density Owner-Built Rural Dwelling Regulations (AOB) program lets owners self-build rural homes without public utilities, but tiny houses are only allowed as accessory dwelling units and RVs generally can't be full-time standalone residences outside designated parks. source
Building permits & codes
RestrictedThe Humboldt County Planning and Building Department enforces California's model building codes locally through permit review and inspection, with the AOB program as the county's specific flexible track for off-grid rural dwellings. source
Septic & composting toilets
Generally allowedSeptic (OWTS) systems are permitted and regulated under the county's Local Agency Management Program, approved by the Board of Supervisors and the North Coast Regional Water Quality Control Board, and administered locally by the Division of Environmental Health.
Greywater reuse
Generally allowedHumboldt County has its own greywater ordinance (Title VI) and Division of Environmental Health issues a specific Graywater Permit, going beyond the state baseline.
Rainwater harvesting
Generally allowedNo Humboldt County-specific ordinance was found restricting rainwater harvesting beyond the state's general framework; treat it as allowed but confirm with the county for larger systems.
Private wells & water rights
RestrictedWell construction, modification, and destruction require a permit from the Division of Environmental Health Land Use Program and must be done by a licensed professional.
Living disconnected from utilities
RestrictedFull off-grid utility disconnection is achievable mainly through the county's AOB program for owner-built rural dwellings without public water or sewer, alongside required septic/well permits; unpermitted occupancy isn't a safe harbor.
Sun30-year normals
- Peak-sun hours, annual average
- 5.0 hrs/day
- Worst month (sizes an off-grid array)
- 2.8 hrs/day
- Yearly output per 1 kW of panels
- 1,374 kWh
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Weather1991-2020
- Precipitation
- 56 in/yr
- Snowfall
- 1 in/yr
- Heating degree days
- 4,489 (moderate)
- Frost-free season
- Mar 7 to Nov 30
How far help isstraight-line
- Hospital
Redwood Memorial Hospital - 18.1 mi
- Fire station
CalFire Weott Station - 4.3 mi
- Hardware store
Ace Hardware - 18.9 mi
- Grocery
Market - 8.5 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 95571).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Humboldt County, CA?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.