Off-Grid Living in Gilliam County, Oregon

Gilliam County, out in Oregon's dry, sparsely populated wheat and wind-turbine country along the Columbia, is one of the more workable places I've researched for off-grid living, but it's a patchwork of who-does-what. The county itself keeps zoning authority, but hands off building permits to a neighboring city and septic permits to a regional health district. If you're planning to build here, expect to make three or four phone calls before you get a straight answer, not one.

Zoning is handled by the Gilliam County Planning Department, which administers the county's Comprehensive Plan and Zoning and Subdivision Ordinance. A lot of the county is zoned Exclusive Farm Use (EFU) under Oregon state statute, and that designation puts real limits on where and how you can site a rural dwelling, so this is the first call to make before you buy land.

Building permits are not issued by the county at all. Since 2021, the City of Boardman has administered building codes (electrical, plumbing, mechanical, structural) for all of Gilliam County, including Arlington, Condon, and Lonerock. I did notice one county page instead pointing people to Mid Columbia Building Code Services, so I'd call ahead to confirm which office is currently handling your permit before you submit anything.

Tiny homes and RVs don't have a Gilliam-specific ordinance that I could find. The state baseline (Oregon HB 2809, 2021) allows RV occupancy as a dwelling under certain conditions, but you'd need to check with the county Planning Department on any local zoning-permit angle.

Septic systems are permitted, but not through the county or DEQ directly. Gilliam contracts this out to the North Central Public Health District, which handles subsurface sewage disposal permitting for county residents, per DEQ's statewide practice of contracting septic permitting to local jurisdictions in all but three Oregon counties.

Greywater and rainwater harvesting don't appear to have county-specific rules on the books. My working assumption is the Oregon DEQ state baseline programs apply by default, but I'd flag this as unconfirmed at the local level.

Wells are governed entirely by the state, through the Oregon Water Resources Department, not the county. Gilliam sits above the Columbia River Basalt Group aquifer, a solid regional groundwater source, but if you're drilling yourself rather than hiring a licensed driller, OWRD has its own permitting and bonding process you'll need to go through directly.

Living off-grid (no utility hookups) doesn't appear to be prohibited anywhere in county code, but a building permit through Boardman will likely still require you to show an approved water source and septic/wastewater plan, so "off-grid" here means off the power grid, not off the permitting grid.

Bottom line: land use is Gilliam County's call, construction standards are Boardman's, septic is the health district's, and wells and water rights are the state's. Confirm each piece separately before you commit to a property.