Off-grid site report
Grays Harbor County, WA
47.0547, -124.1395 · 128 ft elevationRead this before you act on anything below. This is my researched starting point for Grays Harbor County, WA, 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 rulesGrays Harbor County, WA
Zoning & raw-land occupancy
Varies locallyGrays Harbor County has countywide zoning for unincorporated areas under Title 17, with districts like R-1, R-2, R-3, Rural Residential, and General Development. Raw-land occupancy legality depends entirely on the parcel's district; incorporated towns have separate codes. source
Dwellings, tiny homes & RVs
RestrictedState building code governs permanent dwellings; county caps accessory structures at 800 sq ft and 200 sq ft as non-habitable if permit-exempt. RV-as-permanent-dwelling rules aren't confirmed at the county level. source
Building permits & codes
Generally allowedBuilding permits are required for most construction, issued by the county Building Division through its SmartGov portal; small sheds under 200 sq ft are exempt. source
Septic & composting toilets
Generally allowedSeptic systems are permitted and designed by a state-licensed On-Site Designer or Professional Engineer, administered by the county's Environmental Health Division; no point-of-sale inspection is required countywide. source
Greywater reuse
Unclear - verifyNo county-specific greywater ordinance was found; likely inherits the state WAC 246-274 baseline. Confirm with Environmental Health Division.
Rainwater harvesting
Unclear - verifyNo county-specific rainwater harvesting rule was found; likely inherits the state Department of Ecology baseline.
Private wells & water rights
Varies locallyGroup B water systems and subdivision water-availability evaluations are reviewed by the county Environmental Health Division; single domestic wells follow the state's exempt-well statute RCW 90.44.050. source
Living disconnected from utilities
Unclear - verifyNo standalone county ordinance addresses full utility disconnection; approval depends on separately meeting zoning, building, and septic/water requirements for the parcel.
Sun30-year normals
- Peak-sun hours, annual average
- 3.6 hrs/day
- Worst month (sizes an off-grid array)
- 1.2 hrs/day
- Yearly output per 1 kW of panels
- 1,051 kWh
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Weather1991-2020
- Precipitation
- 116 in/yr
- Snowfall
- 3 in/yr
- Heating degree days
- 5,912 (cold)
- Frost-free season
- Apr 29 to Oct 19
How far help isstraight-line
- Hospital
Harbor Regional Health Community Hospital - 14.8 mi
- Fire station
Grays Harbor Fire District #7 - 1.8 mi
- Hardware store
Dependable Glass & Screens - 1.1 mi
- Grocery
Dollar General Market - 2.9 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 98535).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Grays Harbor County, WA?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 21, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.