Off-Grid Living in Jefferson County, Washington

I've been digging into what off-grid living actually looks like in Jefferson County, Washington, the Port Townsend / Olympic Peninsula area, and the short version is: this is a county that regulates pretty thoroughly compared to some rural counties. There's no gap where you can just quietly settle raw land and be left alone.

Zoning is countywide under the Jefferson County Unified Development Code (UDC), administered by the Department of Community Development (DCD). Residential, Mountain Residential, Suburban Residential, Agricultural, and some Planned Development zones all allow single-family dwellings, and DCD says there's no minimum size requirement for a permanent home as long as it meets current building code. Camping on your own residential land is capped at two cumulative weeks a year unless camping is a permitted use in your specific zone.

Dwellings, tiny homes, and RVs: a tiny home on a permanent foundation is treated as a regular single-family dwelling. On wheels, it's a different story, it needs to sit in a Mobile Home Park zone or a Planned Development that allows mobile homes/RVs, and park-model RVs or tiny homes on wheels need a placement permit so the county can check setbacks, water/waste hookups, and critical-area/shoreline location. Container homes are allowed too, treated as single-family residences if the plans meet code.

Building permits run through DCD's Building Division, which has adopted the International Building Code and International Residential Code (the county cites the 2018 editions, adopted by county ordinance in 2022). Some permits also trigger land-use reviews like Conditional Use Permits or Shoreline Substantial Development Permits, so ask DCD early.

Septic is locally administered by Jefferson County Environmental Public Health under its own onsite sewage chapter of county code, built on top of state RCW and WAC authority. Composting toilets are allowed but reviewed and approved at the state Department of Health level. Greywater has to meet the same treatment standard as a combined system, and a standalone greywater setup paired with a composting toilet needs a site-specific soils evaluation from a designer.

Rainwater harvesting doesn't have a distinct Jefferson County rule that I could confirm, this is one to ask DCD or Ecology about directly rather than assume.

Wells: the county requires proof of adequate water quantity and quality for any building permit relying on a well, including recent bacteria/nitrate/chloride testing and a minimum production standard (or a recorded title notice if the well doesn't meet it). This all sits on top of Washington's post-Hirst framework, where counties must independently confirm water availability, and some subbasins (like Big Quilcene) have extra registration requirements through Ecology.

Full utility disconnection isn't banned outright by name, but living without a legal sewage system is treated as a code violation the county actively investigates. Practically, going off-grid here means separately satisfying the building code, septic rules, and water-adequacy requirement, there's no single off-grid exemption.

Bottom line: Jefferson County is workable for off-grid living but expects you to permit almost everything. Start with DCD for zoning/building and Environmental Public Health for septic and wells.