Off-Grid Living in Columbia County, Oregon

I've been digging into what off-grid living actually looks like in Columbia County, Oregon, and here's where things stand based on official sources.

Zoning is countywide, run by the Land Development Services Department's Planning Division. There's an adopted Comprehensive Plan and Zoning Ordinance covering resource zones like Primary Forest and Forest-Agriculture, with minimum parcel sizes and dwelling siting rules. If you're eyeing forest or ag-zoned land, expect extra state-driven tests on top of the local zoning, and I'd call Planning before you buy anything.

Dwellings, tiny homes, and RVs are a mixed bag. The zoning ordinance covers ADUs in residential zones with setback and septic/sewer hookup rules. But whether Columbia County has opted into Oregon's SB 1013 program, which lets a tiny-home-on-wheels or RV serve as a rentable long-term dwelling on rural residential land, is not confirmed anywhere I could find. You'll need to ask the Planning Division directly.

Building permits are required and issued by the county's Building Division under state building code. Before plan review even starts, you need sign-off from Planning, Septic, Road, and Fire, so budget time for that sequence.

Septic systems are permitted, and unusually, Columbia County administers its own On-site Wastewater Program under DEQ's authority rather than routing everything through the state. That's actually a plus if you want local, hands-on answers about siting and repairs. Composting toilet specifics aren't spelled out at the county level, so state OAR standards would presumably apply, but I'd confirm that with the On-site Wastewater office.

Greywater reuse falls under Oregon DEQ's statewide program. I didn't find a Columbia County-specific greywater ordinance, so the state baseline is what governs, and a DEQ permit generally isn't required for indoor greywater that goes to a sanitary sewer or approved onsite system.

Rainwater harvesting off an impervious surface like a roof is exempt from Oregon water-rights permitting, per the state Water Resources Department. Whether a large storage tank triggers county building-permit review isn't spelled out specifically for Columbia County, so ask the Building Division if you're planning something substantial.

Wells fall under the state's domestic-use exemption (up to 15,000 gallons per day for household use) without needing a water right. The county checks well and septic locations as part of the building-permit site plan, but there's no separate county well ordinance beyond state OWRD rules.

Living off-grid from utilities is permitted in principle. Nothing in the county rules bars going without grid electricity, but you do need an approved private water source and wastewater system shown on your building-permit site plan, and final occupancy won't be issued without a completed access permit.

Bottom line: this is a county that lets you build rural and off-grid, but every path runs through Land Development Services for sign-off. Confirm the SB 1013 tiny-home question directly, since that's the biggest open item.