Off-grid site report

Brookings County, SD

44.3209, -96.7512 · 1,654 ft elevation

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

Zoning & raw-land occupancy

RestrictedBrookings County has a countywide Zoning Ordinance administered by the Planning & Zoning Department, and the Agricultural District has been documented (in a 2014 conditional-use record) as requiring a 35-acre minimum lot size for residential use. Land near the City of Brookings also falls under a separate Joint Jurisdiction Zoning Ordinance, so check which zone your parcel sits in with the county. source

Dwellings, tiny homes & RVs

RestrictedThe county zoning ordinance excludes motorhomes and campers from being used as a permanent dwelling, and manufactured/mobile homes need a building permit from the County Zoning Official plus skirting; a second manufactured home on a farmstead needs a conditional use permit. Tiny homes aren't separately addressed, so it's not confirmed whether they'd be treated as manufactured housing or fall under the new residential code, ask Planning & Zoning directly. source

Building permits & codes

RestrictedBrookings County adopted Ordinance 2026-01, bringing in the 2021 International Building Code and 2021 International Residential Code, which is a change from the no-code baseline seen in many rural South Dakota counties. Permits and inspections go through the county's Planning & Zoning office. source

Septic & composting toilets

Generally allowedSeptic systems are permitted statewide under South Dakota's Administrative Rules Chapter 74:53:01, which require a permit and a soil and site evaluation for every new system (no DIY installs for new construction); Brookings County Planning & Zoning coordinates locally on compliance. Composting toilets aren't addressed on any official county or DANR page I found, so that's not confirmed, ask the county or DANR. source

Greywater reuse

Unclear - verifyI couldn't find a Brookings County or South Dakota DANR page that addresses residential greywater reuse specifically, so this is not confirmed. Contact Brookings County Planning & Zoning directly if you're planning a greywater system.

Rainwater harvesting

Unclear - verifyNo Brookings County ordinance or state DANR rule specifically addressing rainwater harvesting turned up in my research, so this remains not confirmed. Check with Brookings County Planning & Zoning before relying on rainwater collection as your primary supply.

Private wells & water rights

Generally allowedPrivate wells on unincorporated county land fall under South Dakota DANR's statewide well construction and water rights program; I didn't find a Brookings-County-specific well ordinance layered on top. The municipal well system referenced for the City of Brookings only applies inside city limits, not to private rural wells.

Living disconnected from utilities

Varies locallyNothing in the county ordinances bans living off the grid, but any electrical or plumbing work you do still has to meet state code, electrical under the National Electric Code and plumbing under the Uniform Plumbing Code, both inspectable by state inspectors. An owner can do the work themselves in an owner-occupied structure, but permits come from the South Dakota Electrical Commission and South Dakota Plumbing Commission. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 4.9 hrs/day
Worst month (sizes an off-grid array): 3.1 hrs/day
Yearly output per 1 kW of panels: 1,433 kWh

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Weather1991-2020

Precipitation: 24 in/yr
Snowfall: 32 in/yr
Heating degree days: 8,430 (severe)
Frost-free season: May 6 to Sep 26

How far help isstraight-line

Hospital Avera Flandreau Hospital: 20.2 mi
Fire station Brookings Fire Department: 1.2 mi
Hardware store Lowe's: 0.6 mi
Grocery Aldi: 0.6 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 57006).

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.