Off-grid site report

Roberts County, SD

45.5529, -96.9456 · 1,178 ft elevation

Read this before you act on anything below. This is my researched starting point for Roberts 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 rulesRoberts County, SD

Zoning & raw-land occupancy

RestrictedRoberts County has adopted a countywide zoning ordinance under state law (SDCL 11-2) covering unincorporated areas; land use depends on the zoning district. source

Dwellings, tiny homes & RVs

Varies locallySingle-family dwellings are a named use in the county ordinance, but tiny homes and RVs as permanent dwellings aren't specifically addressed; likely case-by-case via the Zoning Officer or Board of Adjustment. source

Building permits & codes

RestrictedA county Building/Use Permit is required, with permits tied to progress deadlines and state law compliance; a specific adopted building code edition was not confirmed, so ask Planning and Zoning. source

Septic & composting toilets

Generally allowedSeptic systems are regulated under South Dakota DANR's administrative rule (Title 74, Chapter 74:53:01), and the county requires proof of compliance in the building permit process; composting toilets aren't separately addressed, so ask the county. source

Greywater reuse

Unclear - verifyNo county ordinance or state rule specific to greywater reuse was found; this is genuinely unconfirmed, so ask Roberts County Planning and Zoning or the Community Health office.

Rainwater harvesting

Unclear - verifyNo county ordinance addressing rainwater harvesting was found; this inherits the unclear state baseline, so confirm locally before installing a system.

Private wells & water rights

Generally allowedNo county-specific well ordinance was found; wells are regulated at the state level through South Dakota DANR's Water Rights Program.

Living disconnected from utilities

Varies locallyNothing in the county ordinance bars living disconnected from utilities, but electrical and plumbing work still require separate state acknowledgment permits from South Dakota. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 4.7 hrs/day
Worst month (sizes an off-grid array): 2.7 hrs/day
Yearly output per 1 kW of panels: 1,377 kWh

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Weather1991-2020

Precipitation: 25 in/yr
Snowfall: 43 in/yr
Heating degree days: 8,518 (severe)
Frost-free season: May 9 to Sep 25

How far help isstraight-line

Hospital Coteau des Prairies Health Care System Hospital: 8.8 mi
Fire station: none within range
Hardware store Browns Valley Hardware Hank & Rental: 6.2 mi
Grocery Maynard's Food Center: 6.1 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 57257).

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.