Off-Grid Living in Kitsap County, Washington

I've spent a while digging through Kitsap County's code and the Kitsap Public Health District's site to figure out what off-grid living actually looks like here, and the short version is: it's doable, but it's a patchwork of county zoning, a separate health district for septic and wells, and four cities that opt out entirely. Here's what I found for unincorporated Kitsap County specifically.

Zoning first. Kitsap County's Department of Community Development (DCD) administers countywide zoning under Title 17 of the county code, and it only applies outside the cities of Bainbridge Island, Bremerton, Port Orchard, and Poulsbo, each of which runs its own code. What you can do with raw land depends heavily on the zone you're in. Rural Residential (RR) and Rural Wooded (RW) zones give the most flexibility, but even there, things like manufactured/RV/tiny-home parks are conditional uses requiring a permit and minimum acreage plus setbacks. Don't assume "rural" means "no rules."

On dwellings, DCD's own tiny-home guidance is refreshingly direct: a permanently foundationed tiny home can be permitted like any small house, provided it meets minimum habitable-room standards. But tiny homes on wheels and RVs are a different story, county enforcement has stated they cannot be used as permanent dwellings, and a landowner can't host multiple RVs as housing without becoming a licensed mobile home park. There's a narrow exception for temporary RV living (up to three months, owner or family occupied) but it still requires hookups for water, power, and septic or sewer with health district sign-off.

Building permits run through DCD under the Washington State Building Code with local amendments. One interesting wrinkle: the county's EV-charging requirement doesn't apply to properties with no public utility or commercial power supply, which tells me the code does anticipate genuinely off-grid parcels.

Septic and greywater aren't handled by the county government at all, they go through the Kitsap Public Health District, a separate agency. The district's current onsite sewage ordinance (effective 2025) implements state rules found in WAC 246-272A, and composting toilets paired with an approved greywater system are explicitly recognized as an alternative to conventional septic in at least some cases. Any greywater reuse needs Health District approval as part of that same review.

Rainwater harvesting doesn't have a dedicated county or health district page that I could find, so I'd call this unclear locally, defer to Washington Department of Ecology's statewide stance and confirm nothing local overrides it.

Wells are permitted and defined by the Health District: private wells serve up to two connections, and Kitsap has a local exemption letting certain two-party systems still count as "private." New wells need a site inspection, formal approval, and a pump test. Regional groundwater in the Kitsap Peninsula is also governed by state watershed (WRIA) rules that may cap withdrawals, worth confirming directly.

Bottom line on full utility disconnection: there's no ordinance saying "off-grid is illegal," but every path, building permits, RV occupancy, septic, all assume you'll eventually plug into an approved water and waste system. Truly living unplugged from all oversight isn't clearly sanctioned or banned, it's just not addressed head-on.