Off-grid site report

Bon Homme County, SD

42.8736, -97.8127 · 1,201 ft elevation

Read this before you act on anything below. This is my researched starting point for Bon Homme County, SD, not legal advice and not a guarantee. Rules change, and the deciding facts on any specific parcel (setbacks, perc results, overlay districts, deed restrictions, road frontage) live at the county or town office, not in any database. Before you buy land or build, confirm the current rules directly with the local zoning and health offices - the sources on this page tell you exactly who to call.

The local rulesBon Homme County, SD

Zoning & raw-land occupancy

Varies locallyBon Homme County has its own zoning ordinance (No. 99-1, amended through 2015) creating Agricultural and Rural Residential districts, and living on raw land may need conditional-use approval depending on the district. Incorporated towns like Tyndall, Avon, and Springfield have their own separate zoning, so check which jurisdiction you're in. source

Dwellings, tiny homes & RVs

Unclear - verifyI couldn't find an official Bon Homme County provision specifically addressing tiny homes, RVs, or accessory dwellings as a distinct use. This is a question to put directly to the county's zoning office rather than assume either way.

Building permits & codes

Varies locallySouth Dakota has no mandatory statewide building code, so permitting authority is local. I could not confirm whether Bon Homme County itself has adopted the IBC/IRC for unincorporated areas, while incorporated towns like Avon and Springfield run their own permitting through their town halls. source

Septic & composting toilets

Generally allowedSeptic and onsite wastewater systems are permitted and regulated statewide by South Dakota DANR under ARSD 74:53:01, with installation required through certified installers. Bon Homme County's own local septic rules (lot size, setbacks) weren't posted online, so confirm specifics with the county. source

Greywater reuse

Unclear - verifyNeither South Dakota state rules nor Bon Homme County's own ordinance appear to address residential greywater reuse specifically. Ask the county zoning or health authority directly since no official guidance was found.

Rainwater harvesting

Unclear - verifyNo county ordinance or state DANR rule on rainwater harvesting was found, and domestic water use is generally exempt from DANR water-rights permitting, but there's no explicit collection/storage rule confirmed for Bon Homme County.

Private wells & water rights

Generally allowedPrivate wells are permitted statewide and regulated by South Dakota DANR's Water Rights Program under statewide well construction standards, typically requiring a licensed driller. No stricter Bon Homme County-specific well rule was found.

Living disconnected from utilities

Varies locallyI found no state or Bon Homme County law that outright bars living off the utility grid, but South Dakota's Electrical Commission governs electrical work statewide, which would still apply in the county. Confirm any self-wiring provisions with the Dept. of Labor and Regulation. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 5.0 hrs/day
Worst month (sizes an off-grid array): 3.4 hrs/day
Yearly output per 1 kW of panels: 1,439 kWh

JFMAMJJASOND

Weather1991-2020

Precipitation: 25 in/yr
Snowfall: 36 in/yr
Heating degree days: 7,137 (cold)
Frost-free season: Apr 28 to Oct 5

How far help isstraight-line

Hospital Saint Michael's Hospital Avera: 8.6 mi
Fire station Niobrara Fire Station: 14.0 mi
Hardware store Ace Hardware: 20.8 mi
Grocery Walmart Supercenter: 21.0 mi

From OpenStreetMap. Road miles will be longer, often much longer in hill country.

Plan this spot

These open with this location's real numbers already filled in (ZIP 57062).

Size a solar system Heat loss & insulation Firewood per winter Rainwater harvest Garden size Panel tilt

Sources: US Census Bureau geocoder; NLR PVWatts v8 (solar); NOAA NCEI 1991-2020 climate normals (nearest station) or Open-Meteo (ZIP-centroid) for weather; Open-Elevation; OpenStreetMap contributors. Public data retrieved Aug 22, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.