Off-Grid Laws in Utah

I've spent a good chunk of time digging through Utah statutes, administrative code, and state agency pages to piece together what "off-grid" actually means legally in this state, and the honest answer is: there's no single off-grid law. Utah regulates the pieces, water, wells, wastewater, building, separately, and then hands a lot of the actual permitting and enforcement down to counties and towns. If you're planning a build here, you need to think in layers: state rules set the floor, but your county or municipal zoning and building department decides what actually happens on your parcel.

Zoning and raw land. There's no statewide rule saying you can or can't live in a yurt, tent, or RV on your own land. That's entirely a county or town zoning call. Some rural counties are permissive about temporary or alternative dwellings, others are strict. I can't give you a blanket answer here, you have to call your specific county planning office.

Tiny homes and RVs. Utah hasn't passed a tiny-home-specific statute. If your tiny home is on a permanent foundation, it typically falls under the state residential building code (based on the International Residential Code with Utah amendments). If it's on wheels, it's usually treated as an RV, which most counties don't allow as a permanent residence outside a licensed RV park. But this classification, and how strictly it's enforced, varies by county, so confirm locally before you buy or build.

Building permits and codes. This is one of the more clearly state-driven pieces. The Uniform Building Standards Act (Utah Code Title 15A) sets a statewide construction code, currently built on the 2021 IRC and IBC with Utah-specific amendments. The Division of Professional Licensing and the Uniform Building Code Commission oversee code adoption, but your city or county building department is the "compliance agency" that actually issues permits and does inspections. Local governments can add on top of the state code, but they can't weaken it.

Septic and composting toilets. Utah Admin. Code R317-4, authorized under the state's Water Quality Act, governs onsite wastewater systems statewide, but plan review and permitting is delegated to local health departments. If you want anything other than a standard septic tank, alternative systems, vault privies under a separate rule (R317-560), you'll need your local health department's sign-off, and the state division can pull that delegated authority if a county isn't doing it right.

Greywater. Utah actually has a dedicated statewide greywater rule, R317-401, which is good news, it means greywater reuse is legal here, not just tolerated. But it only covers subsurface landscape irrigation reuse. It does not cover indoor reuse or hauling greywater elsewhere. Permits are required and administered by your local health department under state authorization.

Rainwater harvesting. This is genuinely off-grid-friendly. Utah Code 73-3-1.5 lets you collect rainwater in up to two covered containers of 100 gallons max each with no registration at all. Go bigger, up to 2,500 gallons total, and you register for free with the Division of Water Rights. Water use is limited to the same parcel where it's captured.

Wells and water rights. This is the big one, and it's where Utah diverges from a lot of states. You cannot just drill a domestic well because it's "small." You need a valid water right from the State Engineer (Division of Water Rights) before construction, and a "Start Card" that functions as your permit to drill. Wells must be built by a licensed driller. There's no small-well exemption here the way there is in some states, so budget time to work through the water rights process before you plan your water source.

Living disconnected from utilities. There isn't one state law that says "you may live without grid power or municipal water/sewer." Whether you can get a certificate of occupancy without hooking into public utilities, or with just an approved well and septic, is a local building and health department call. I couldn't confirm a statewide answer here; ask your county building department directly.

Bottom line: Utah's state government controls water (heavily), wastewater rules, and the baseline building code, but zoning, dwelling type, and utility hookups are decided county by county. Call before you buy land or start building.