Off-Grid Living in Washington County, Utah

I've spent a lot of time digging through county code libraries for these guides, and Washington County, Utah is a good example of a place where "off-grid" is legally possible but administratively a real project, not a loophole.

First, the basics: Washington County's Community Development Department handles zoning and building permits for unincorporated land. But if you're inside city limits (St. George, Hurricane, Ivins, Washington City, etc.), that city's own planning and building department is in charge instead, with its own rules layered on top of or different from the county's. Always confirm which jurisdiction your parcel sits in before you plan anything.

On zoning, the county code sets up agricultural and residential zones (RA-1, RA-2.5, A-10, A-20, and others) with minimum lot sizes, and some areas like Pine Valley have an overlay zone with stricter add-on rules. There's no blanket allowance in the code I found for just living on raw land in a tent or yurt; occupancy is tied to actually getting a building permit, which loops in water, septic, access, and power requirements.

Speaking of which, the county's own FAQ lays out a checklist before it will issue a dwelling permit: your lot has to meet zone minimums, you need approved access, a confirmed water source, septic feasibility signed off by the Southwest Utah Public Health Department, a power source (which can be "alternative energy," not necessarily grid electric), and a fire suppression plan. That's a meaningfully open door for solar-based power, but water and septic are the sticking points.

Septic permitting itself runs through the Southwest Utah Public Health Department, with the Washington County Water Conservancy District weighing in on density questions in its service area, all under the state's R317-4 standard. I did not find a composting-toilet-specific policy on the county's official pages, so that's genuinely unconfirmed, ask the health department directly. Greywater similarly just defers to the state rule (R317-401) with no county-specific twist that I could confirm.

Rainwater harvesting looks fine; state law already allows it and I found no county restriction layered on top.

Wells and water rights are state-controlled through the Division of Water Rights, but the county's building checklist requires proof of a metered connection, a producing well, or culinary water rights before it issues a permit. One rule worth flagging clearly: county subdivision code appears to prohibit hauling water in as a residence's primary water supply, except for the planning commission approving it for bona fide agricultural operations. That effectively rules out a common off-grid workaround (trucking in water long-term) as a legal path to a dwelling permit here.

Bottom line on utilities: going off-grid on power is realistically achievable since alternative energy is explicitly accepted. Going off-grid on water and septic is much harder, since the county ties your building permit to state-and-county approved water and waste systems before it will let you build at all.