Building permits, zoning and land rules in Campbell County, South Dakota

The best available answer for a home in unincorporated Campbell County is that a general county building permit is not required, but we could not confirm that answer in a current official ordinance¹. Ask the Campbell County Auditor to confirm the rule for the parcel and project before ordering materials⁵. For qualifying construction begun after July 1, 2026, South Dakota's default standard is based on the 2024 International Building Code where a local government has not adopted its own ordinance; residential structures, mobile or manufactured homes, farmsteads and their accessory buildings are excluded from that specific default⁶. State law also bars local governments from requiring a building permit for substantially similar repairs or replacements of listed exterior parts of an owner-occupied detached house, including same-size doors and windows, nonstructural siding, gutters and fencing, except on designated historic property¹⁰. Other applicable codes and ordinances still apply¹⁰.

We could not confirm a dedicated Campbell County building, planning or zoning office, so the practical first call is the Campbell County Auditor at (605) 955-3366^1,5. The state directory lists the Auditor at PO Box 37, Mound City, 57646⁵. Ask that office whether the county has adopted a building-code ordinance, whether a local permit or inspection applies, who handles county-road approaches, and whether the parcel lies under a floodplain program⁵. Electrical and plumbing are separate state-administered tracks: qualifying electrical work requires notice, rough-in review before concealment and a final inspection before occupancy, while statewide plumbing inspection applies outside cities that administer their own inspection requirements^3,4. Development in a floodplain needs a permit only where the relevant local community participates in the National Flood Insurance Program, and we could not confirm Campbell County's participation status¹¹.

Campbell County's current zoning status is not established by a current official county ordinance, map or statement¹. Available information reports no county zoning, but a buyer should not treat a parcel as unrestricted without current confirmation from the County Auditor^1,5. South Dakota law allows a county board to regulate uses, building size, height, yards, lot coverage and population density through zoning, but that authority alone does not prove Campbell County adopted those controls¹². Ask the County Auditor for any current zoning ordinance, subdivision rules, setbacks and parcel-specific restrictions before closing⁵. We also could not confirm county rules for minimum lot size, minimum dwelling size, accessory dwellings, manufactured-home placement or short-term rentals¹. A vacation home operated as a lodging establishment needs a South Dakota Department of Health lodging license, but that state license does not settle county land-use approval¹³.

South Dakota DANR administers the minimum on-site wastewater rules throughout Campbell County, subject to any stricter local requirements². A conventional individual residential system may be designed and installed under the state chapter without submitting plans and specifications for DANR review, while a nonconventional installation or deviation requires state review and approval before construction¹⁴. Installers of individual and small wastewater systems must be certified by the South Dakota Plumbing Commission². DANR or its authorized representative may inspect an installation, equipment or operation at any time, but the rule does not mandate the same routine inspection for every system¹⁴. A private system cannot be used when the property falls within a municipality or sanitary district, public sewer is within 400 feet, and that jurisdiction requests to serve it¹⁴. Across Campbell County, 58.1% of soils lack severe limits for a conventional drain field, so obtain a parcel-level site evaluation⁹. DANR answers plan-review questions at (605) 773-4647².

We could not confirm a current Campbell County rule that allows or prohibits living in an RV or tiny home on private land¹. Campbell County's uncertain zoning status is not permission to occupy either type of unit, so ask the County Auditor about the specific parcel, duration and sanitation plan^1,5. South Dakota's campground license covers a regulated campground business and requires state review and an on-site health inspection; that rule does not answer whether an owner may live in a personal RV on private land¹⁵. Off-grid sanitation has a clearer state framework: where water or electricity is unavailable, vault privies may be used, while chemical, incinerator and composting toilets are experimental systems requiring DANR approval before installation¹⁴. A tiny home still needs a lawful wastewater solution even though its county occupancy and placement rules remain unconfirmed^1,16.

1. Ask the Campbell County Auditor in writing to confirm the current building-permit, zoning, subdivision, floodplain and county-road-access requirements for the parcel^1,5.

1. Determine the water source; a state water-right permit applies only to covered water uses, must precede drilling when required, and every well driller must hold a license⁸.

1. Have the septic site evaluated and contact DANR before choosing any system that is not a conventional individual residential installation^2,14.

1. Obtain the homeowner electrical permit before personally wiring a qualifying home or farmstead, then arrange the required rough-in and final inspections³.

1. Arrange the state plumbing certificate and inspection unless a city-administered program applies⁴.

1. Obtain SDDOT approval before building an approach to a state highway, and finish right-of-way construction within 45 days after starting it¹⁷.

1. For disturbance of one acre or more, prepare the stormwater plan and submit the state notice with the first-year fee at least 15 days before construction; published fees run from $100 for less than 5 acres to $750 for 80 acres or more¹⁸.

Start with written confirmation from the County Auditor because Campbell County's general building-permit and zoning positions are not backed by a current ordinance in the available record^1,5. Test the proposed home and drain-field area because only 58.1% of county soils lack severe limits for a conventional septic field⁹. Campbell County averages about 19 inches of precipitation a year, and severe drought occurs in 11.6% of years, so verify well yield and water rights before treating a water plan as settled^8,9. The land is mostly gentle and open, with 97.2% at a slope of 15% or less and 0.7% forest cover, which makes wind exposure and shelter planning practical due-diligence items⁹. Campbell County has 1.8 people per square mile, and the nearest city of 100,000 or more is about 170 miles from the county center, so confirm contractor travel costs and emergency access⁹. The median property-tax bill is about $1,266 a year, with an effective rate near 1.4%⁹.