Off-grid site report
Yuma County, AZ
32.6806, -114.6240 · 200 ft elevationRead this before you act on anything below. This is my researched starting point for Yuma County, AZ, 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 rulesYuma County, AZ
Zoning & raw-land occupancy
RestrictedYuma County has countywide zoning under its Zoning Ordinance, implementing the state Comprehensive Plan mandate (ARS Title 11, Ch. 6); raw-land use depends on the assigned zoning district. Rules differ if the parcel is inside City of Yuma limits, which has its own separate zoning code. source
Dwellings, tiny homes & RVs
Varies locallyThe county's Recreation Vehicle Subdivision district permits one RV, park model, manufactured home, or site-built home per lot if district requirements are met; freestanding tiny homes on wheels outside such districts are not confirmed as permitted permanent dwellings by Yuma County. source
Building permits & codes
RestrictedYuma County Development Services is the permitting authority for unincorporated areas; manufactured homes require a county set-up/installation permit plus compliance with state (ADOH) installation standards, and other structures with plumbing/electrical generally need permits too. source
Septic & composting toilets
Generally allowedThe county administers septic permitting under Arizona Administrative Code rules, requiring an Environmental Health Plan Review and Sewage Disposal Permit with engineered plans for most systems; composting toilets are not separately addressed on county pages. source
Greywater reuse
Unclear - verifyNo distinct Yuma County greywater ordinance was found; the state's general ADEQ greywater permit tiers likely apply, administered locally, but this is not confirmed on county pages, so ask the Environmental Programs Division. source
Rainwater harvesting
Generally allowedNo Yuma County restriction on rooftop rainwater harvesting was found; this appears to inherit Arizona's statewide default of unrestricted residential collection, though it's not explicitly confirmed at the county level.
Private wells & water rights
RestrictedYuma County lies outside Arizona's Active Management Areas, so groundwater rules are lighter, but ADWR still requires well registration (Notice of Intent to Drill) statewide and a water right for non-exempt wells over 35 gallons per minute. source
Living disconnected from utilities
Generally allowedNo countywide ordinance mandating connection to municipal power, water, or sewer was found for unincorporated Yuma County, so off-grid utility setups appear permitted, though this is not explicitly confirmed as differing from the state default.
Sun30-year normals
- Peak-sun hours, annual average
- 6.7 hrs/day
- Worst month (sizes an off-grid array)
- 5.1 hrs/day
- Yearly output per 1 kW of panels
- 1,816 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 4 in/yr
- Snowfall
- 0 in/yr
- Heating degree days
- 841 (mild)
- Frost-free season
- Jan 4 to Dec 27
How far help isstraight-line
- Hospital
Onvida Health Yuma Medical Center;Yuma Regional Medical Center - 0.7 mi
- Fire station
Yuma Fire Department Station 3 - 0.5 mi
- Hardware store
Lowe's - 0.9 mi
- Grocery
Fry's Food and Drug - 0.4 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 85364).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Yuma County, AZ?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.