Off-grid site report

Washoe County, NV

39.5653, -119.4861 · 4,236 ft elevation

Read this before you act on anything below. This is my researched starting point for Washoe County, NV, 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 rulesWashoe County, NV

Zoning & raw-land occupancy

RestrictedWashoe County has 18 regulatory zones controlling allowed uses; the county enforces against unpermitted occupancy of raw land. Check EZ Maps for your parcel's zone. source

Dwellings, tiny homes & RVs

RestrictedRVs cannot be used as a permanent dwelling under county nuisance code, only as temporary housing alongside a valid building permit; manufactured homes are allowed only as limited accessory dwellings in certain zones. Tiny houses are treated as standard dwellings under the adopted building code.

Building permits & codes

Generally allowedWashoe County has adopted the 2018 IRC/IBC code family with local amendments under County Code Chapter 100, and permits are issued through the Planning and Building Division. source

Septic & composting toilets

Generally allowedSeptic systems require permitting through Northern Nevada Public Health Environmental Health Services, starting with a test trench inspection; composting toilets are regulated as non-sewered toilets but detailed residential standards were not confirmed, so ask NNPH directly. source

Greywater reuse

Unclear - verifyNo official Washoe County or NNPH page on residential greywater reuse was found; this is not confirmed, so contact NNPH or the county Building Program for guidance.

Rainwater harvesting

Generally allowedNevada state law (AB 138) permits single-family rooftop rainwater collection for non-potable use, and no Washoe County restriction was identified, though UNR Extension advises checking locally. source

Private wells & water rights

Generally allowedDomestic wells are exempt from state appropriation permitting, but Washoe County requires its own well construction permit through NNPH, drilled by a state-licensed driller, and water rights dedication may be required before building permits are issued. source

Living disconnected from utilities

RestrictedGrid disconnection itself isn't banned, but a legal permanent residence in unincorporated Washoe County still needs a permitted building, approved well or municipal water, and an approved septic system. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 6.0 hrs/day
Worst month (sizes an off-grid array): 4.0 hrs/day
Yearly output per 1 kW of panels: 1,701 kWh

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Weather1991-2020

Precipitation: 5 in/yr
Heating degree days: 5,486 (moderate)

How far help isstraight-line

Hospital Northern Nevada Medical Center: 11.4 mi
Fire station Sparks Fire Station 5: 10.3 mi
Hardware store Big R: 12.5 mi
Grocery Safeway: 11.6 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 89442).

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 22, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.