Off-grid site report
Fauquier County, VA
38.7174, -77.7932 · 558 ft elevationRead this before you act on anything below. This is my researched starting point for Fauquier County, VA, 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 rulesFauquier County, VA
Zoning & raw-land occupancy
RestrictedFauquier County has an adopted, countywide Zoning Ordinance administered by the Zoning & Development Services Division; a Zoning Permit is generally required before placing a structure or starting most non-agricultural uses on land. source
Dwellings, tiny homes & RVs
Varies locallyFoundation-built tiny homes are treated as standard dwellings under the state building code and county zoning; tiny houses on wheels are classified as RVs, and long-term residential use as a THOW is likely not allowed though not confirmed on an official page. ADUs are allowed in some districts with added review. source
Building permits & codes
Generally allowedThe county administers the state Uniform Statewide Building Code locally through Building, Permitting & Inspections; most new construction and accessory structures need a Building/Zoning Permit, and delinquent taxes must be resolved first per state and county rules. source
Septic & composting toilets
Generally allowedSeptic systems are permitted through the Fauquier County Health Department, a local office of the Virginia Department of Health, with additional county code requirements for licensed installers, tank access, and pumping frequency. Composting toilets are allowed under state regulation. source
Greywater reuse
Unclear - verifyNo Fauquier-specific greywater ordinance was found; this appears to default to the state baseline enforced by the Health Department (a VDH office), so confirm directly with that office. source
Rainwater harvesting
Unclear - verifyNo county-specific rainwater harvesting rule was found; presumed to follow the general state baseline, but this is not confirmed for Fauquier specifically.
Private wells & water rights
Generally allowedPrivate wells are permitted through the Fauquier County Health Department (VDH office), with drillers licensed under county code; Fauquier is also on a state list of counties allowed to require extra well-water testing before building permits, though whether Fauquier adopted that ordinance is not confirmed. source
Living disconnected from utilities
Unclear - verifyNo ordinance was found requiring grid electric connection, but occupancy still requires an approved water source and septic/sewage system before a Certificate of Occupancy; the zoning ordinance does include a waiver category for public/central water systems. source
Sun30-year normals
- Peak-sun hours, annual average
- 4.9 hrs/day
- Worst month (sizes an off-grid array)
- 3.6 hrs/day
- Yearly output per 1 kW of panels
- 1,362 kWh
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Weather1991-2020
- Precipitation
- 44 in/yr
- Snowfall
- 16 in/yr
- Heating degree days
- 4,700 (moderate)
- Frost-free season
- Apr 10 to Oct 31
How far help isstraight-line
- Hospital
Reston Hospital Center - 28.6 mi
- Fire station
Warrenton Volunteer Fire Company - 0.7 mi
- Hardware store
The Home Depot - 1.5 mi
- Grocery
Harris Teeter - 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 20187).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Fauquier County, VA?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.