Off-grid site report

Okanogan County, WA

48.9372, -119.4375 · 919 ft elevation

Read this before you act on anything below. This is my researched starting point for Okanogan 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 rulesOkanogan County, WA

Zoning & raw-land occupancy

Varies locallyOkanogan County has adopted countywide zoning under Title 17A, with districts like Rural 1/5/20/160, Agriculture, and the Methow Review District. A site analysis/zoning determination from the Planning Department is required before building, even for permitted uses. source

Dwellings, tiny homes & RVs

Varies locallyThe county has a specific Mobile Home/RV Permitting ordinance (1983-001) plus its building code ordinance, but specific tiny-house-on-wheels occupancy rules were not confirmed from an official source; ask the county directly. source

Building permits & codes

Generally allowedOkanogan County adopts the state-amended IBC/IRC under RCW 19.27.074 via the Washington State Building Code Council, with a zoning site analysis required before a building permit is issued. source

Septic & composting toilets

Generally allowedThe Okanogan County Public Health District enforces onsite sewage regulations for systems under 3,500 gallons/day; resident homeowners may self-install gravity-flow systems, others need a licensed installer. source

Greywater reuse

Varies locallyState DOH guidance (WAC 246-274) allows greywater reuse via subsurface irrigation alongside a required blackwater system, but whether OCPHD accepts composting-toilet-plus-greywater-only in place of full septic is not confirmed locally. source

Rainwater harvesting

Generally allowedNo Okanogan County-specific restriction was found; the county appears to defer to Washington Department of Ecology's general policy allowing rainwater collection.

Private wells & water rights

Varies locallyWell legality depends heavily on watershed: the Methow (WRIA 48) has an instream flow rule restricting new wells, and the Okanogan (WRIA 49) caps new water use pending a new watershed plan; a site-specific determination from Ecology is essential. source

Living disconnected from utilities

Unclear - verifyNo county ordinance bans off-grid disconnection outright, but occupancy in practice requires an approved septic system and a lawful water source recognized by Ecology and the county; full disconnection isn't affirmatively authorized. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 4.4 hrs/day
Worst month (sizes an off-grid array): 1.5 hrs/day
Yearly output per 1 kW of panels: 1,204 kWh

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Weather1991-2020

Precipitation: 15 in/yr
Heating degree days: 6,342 (cold)
Frost-free season: Apr 30 to Oct 8

How far help isstraight-line

Hospital North Valley Hospital: 15.9 mi
Fire station Osoyoos Fire Hall 192: 6.2 mi
Hardware store Home Hardware: 6.7 mi
Grocery Akins: 0.7 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 98844).

Size a solar system Heat loss & insulation Firewood per winter Rainwater harvest Garden size Panel tilt

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.