Off-Grid Living in Smith County, Kansas

I'll be upfront: Smith County, Kansas is a tough one to research online. Searches for "Smith County" keep pulling up Smith County, Tennessee, and I was not able to locate Smith County, Kansas's own zoning ordinance, building permit page, or a dedicated well/rural water district page. So a fair amount of this guide is "here's the Kansas state baseline, and here's what's confirmed versus not" rather than a clean county rulebook. If you're planning a build here, treat this as a starting point and call the county directly.

Zoning. Kansas law (state statute) lets a county's board of commissioners adopt zoning for unincorporated land by resolution, but it's optional, county by county. I could not confirm whether Smith County has actually adopted countywide zoning for its unincorporated area. The city of Smith Center does have its own zoning function inside city limits. If your land is outside any city, you need to ask the county directly whether zoning applies to your parcel.

Dwellings, tiny homes, RVs. No Smith County document was found addressing tiny homes or RV occupancy specifically. Kansas has no statewide statute on this either, so it falls to local rule, and I couldn't confirm what that local rule is here.

Building permits and codes. Kansas doesn't impose a mandatory statewide building code outside state-owned property, so unless Smith County or Smith Center has adopted its own code (not confirmed in my research), this is genuinely an open question you need to ask the county about.

Septic and composting toilets. This one I can confirm with more confidence: the Kansas Department of Health and Environment (KDHE) lists Smith County as having its own adopted sanitary code, dated 1995. That means septic systems here are governed both by KDHE's statewide onsite wastewater standards and by the county's own code, which would set permitting, siting, and inspection rules. I could not read the actual PDF of the Smith County code, so I can't tell you how it treats composting toilets specifically, if at all. Ask the county environmental health authority (routed through KDHE's county code listing) for that detail.

Greywater. Not confirmed at the county level. Kansas counties typically fold greywater into their sanitary code's general "effluent" or wastewater definitions rather than regulating it separately, but I don't have the Smith County text to confirm that's the case here.

Rainwater harvesting. No Smith County restriction found. This inherits the Kansas state baseline: ordinary household rainwater catchment is treated as a domestic use exempt from water-rights permitting.

Wells. Domestic well construction is regulated statewide by KDHE, and drilling must be done by a state-licensed water well contractor. KDHE's Geology and Well Technology Unit handles technical questions. No separate Smith County well ordinance or rural water district page was found.

Utility disconnection. No Smith County ordinance requiring hookup to public water, sewer, or electric was found, and Kansas has no state law mandating it either. Any such requirement would have to come from a local rule I couldn't locate, so treat this as unconfirmed rather than a green light.

Bottom line: septic is the one area where Smith County clearly has its own code on the books. Everything else, zoning, building, tiny homes, greywater, and utility rules, needs a direct call to the county before you buy or build.