Off-Grid Living in Washington County, Colorado

I've spent a good bit of time digging through Washington County, Colorado's official pages, and the honest answer is: this is classic sparse rural Colorado country, big lots, a light-touch land use office, and a regional health district handling the messy stuff. Here's what I found, level by level.

Zoning is handled by the Washington County Land Use Office for unincorporated land. The county has a Planning Commission and Board of County Commissioners who sign off on land use changes, and there's a specific "Exemption from Subdivision" process for parcels of 35 acres or less. One residence per parcel is the norm; if you want more than one dwelling on less than 35 acres, you're generally looking at merging exemptions back into a larger tract, plus health department sign-off on septic capacity for multiple households. Applications go to the Planning Commission first, then the Commissioners for final say.

Dwellings: the county requires building permits for "residences, all categories, including mobile/manufactured homes." I could not find county-specific language on tiny homes on wheels or RVs used as full-time housing. My guess, and it's only a guess, is Washington County defaults to the state's general treatment of these as RVs rather than permanent dwellings, but confirm this with the Land Use Office directly before you buy or move one in.

Building permits are required countywide in unincorporated areas for residences, garages, additions, decks with roofs, and screened porches. I didn't find published fee schedules or turnaround times on the official site, so don't take any number you hear secondhand as gospel, call the Land Use Office.

Septic is not handled by a county health department here; it's the Northeast Colorado Health Department (NCHD), a six-county regional health district, that issues Onsite Wastewater Treatment System (OWTS) permits. Any building generating wastewater and not tied to a city sewer needs one of these permits, whether you're building new or repairing an old system. Composting toilets don't appear to have county-specific carve-outs, so the state's baseline OWTS rules likely apply until NCHD says otherwise.

Greywater and rainwater are both areas where I found no county or NCHD-specific program. Colorado's statewide baseline rules (which generally require a locally adopted program for greywater, and set modest limits for rainwater collection) appear to be what governs here by default. Not confirmed at the county level, so ask NCHD and the county directly.

Wells are permitted by the state, through the Division of Water Resources, not the county. The county's only role is feeding land-use referral information (for subdivision exemptions and special use permits) to DWR for water-supply review. Exempt-well eligibility follows the general state statute for parcels outside designated basins.

Utilities: I found no Washington County ordinance forcing you to connect to grid power or municipal water/sewer on unincorporated land. That said, you'll still need your building permit and, if you're generating wastewater, your OWTS permit, off-grid living doesn't exempt you from those two. If you're inside an incorporated town like Akron or Otis, check that town's own code separately, since town rules can be stricter than the county's.