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

Yes. In unincorporated Grant County, excavation, construction, moving or alteration of a building or accessory building cannot begin until the County Zoning Officer issues a building permit¹. The application must show dimensions, building uses, and existing or proposed water and sewer facilities, and the issued permit must be visible from the public right-of-way¹. Work must begin within 180 days and be substantially completed within one year or the permit expires¹.

Grant County does not apply one general construction code to every project; specific code requirements cover certain regulated uses and structures¹. State electrical and plumbing requirements can apply separately from the county land-use permit^4,6. The County Zoning Officer may inspect buildings or premises as needed to enforce the zoning ordinance, but the ordinance does not establish a routine inspection schedule for every permit¹. A general certificate-of-occupancy rule could not be confirmed, so ask Planning & Zoning what closeout documents apply².

South Dakota's default 2024 International Building Code standard for construction begun after July 1, 2026 does not apply to residential structures, manufactured homes or farmsteads, so the county permit and the ordinance remain the main rules for a rural home⁷.

The Grant County Planning & Zoning Office issues building permits and administers the comprehensive land-use plan, subdivision ordinance, zoning ordinance and drainage ordinance². The office also reviews plats and site plans, assigns addresses for new construction and serves as the Floodplain Administrator².

Building-permit applications are available for pickup and are approved by the Planning & Zoning Officer after review². Published structure-permit fees vary with construction cost, and the county also lists separate fees for matters such as drainage permits, plat inspections, variances and conditional uses². Contact the office at (605) 432-7580 or Steve.Berkner@grantcountysd.us, or visit 210 E 5th Ave, Milbank, SD 57252². Incorporated municipalities may administer their own land-use rules, so a parcel inside a city should start with that municipality¹.

Yes. Grant County's zoning ordinance applies to unincorporated land and includes agricultural, commercial or industrial, natural-resources, planned-development and aquifer-protection districts¹. Rules depend on the zoning district and proposed use, so confirm the parcel classification before design begins¹.

The ordinance contains district- and use-specific setbacks rather than one setback for every parcel¹. In the Agricultural District, main buildings are limited to 35 feet or two and one-half stories, with exceptions that include agricultural buildings and structures not used for human occupancy¹. Customary farm and animal fencing in that district has a specific exemption, but the cited rule does not create a general agricultural exemption from building or zoning requirements¹. Special minimum lot sizes for uses such as certain animal-feeding operations and private campgrounds are not a universal residential minimum¹.

In the Agricultural District, residential lots must be at least 2 acres, not counting road right-of-way¹. The Agricultural District requires a front yard of at least 100 feet, a side yard of at least 50 feet, and a rear yard of at least 50 feet or 20 percent of lot depth¹. Dividing land into parcels also triggers platting: South Dakota requires a recorded plat before a transfer of the parcels, and the county subdivision ordinance bars recording a plat or selling lots until approval^8,9.

South Dakota administers minimum requirements for individual and small on-site wastewater systems, and local governments may impose stricter standards³. The state septic program says South Dakota has installation requirements and a certification program for septic-system installers¹⁰. South Dakota's guidance is to contact DANR before installing any new on-site system except a conventional system serving an individual residence³. Contact the state on-site wastewater program at (605) 773-4647 for system-review questions, then ask Grant County Planning & Zoning whether a local review applies to the parcel^2,10.

A universal septic-permit or inspection path for every Grant County system could not be confirmed. The site still needs careful evaluation: only about 6.3% of county soils are rated without severe limitations for a conventional septic drain field¹¹. That soil statistic does not decide whether an individual site will pass, but it makes early soil and system planning prudent¹¹. Where water or electrical service is unavailable, state rules allow specified unconventional sanitation systems under conditions, and experimental systems require state approval before installation¹².

Grant County's general rule for living long-term in an RV on private land could not be confirmed, and the private-campground provisions do not answer that question for an individual parcel. Private campgrounds must provide electric service, potable water and sewage-disposal facilities meeting applicable rules, but that requirement does not establish a countywide utility-connection rule for ordinary homes¹. Ask Planning & Zoning whether an RV stay is an allowed principal, accessory or temporary use in the parcel's district².

A rule expressly addressing tiny-home occupancy also could not be confirmed. Covered construction, moving or alteration still requires a county permit¹. Manufactured homes have separate size, placement and design conditions; those thresholds are not a general minimum for every site-built dwelling¹. The ordinance's accessory-housing provision is limited to housing associated with a Class A concentrated animal feeding operation and requires Board of Adjustment approval, so it is not a general accessory-dwelling allowance for residential parcels¹.

1. Confirm that the parcel is outside an incorporated municipality and ask Grant County Planning & Zoning for its district, allowed use, setbacks and site-plan requirements^1,2.
2. Verify legal access and driveway placement; county driveways must be 100 feet apart on local roads, 300 feet on collector roads and 500 feet on arterial roads, and a state-highway connection needs South Dakota Department of Transportation approval before the county issues a building or use permit¹.
3. Plan water and wastewater early because a water-right permit may be required before well drilling, while septic work is subject to state minimum requirements and possible stricter local standards^3,5.
4. Submit the county building-permit application and wait for approval before excavation or covered building work begins^1,2.
5. Arrange state electrical and plumbing permits or inspections that apply; qualifying owner-occupants may perform their own electrical work only under the homeowner-permit conditions^4,6,13.
6. Ask Planning & Zoning which county inspections and occupancy closeout apply because a general county process could not be confirmed².

Start with the zoning map, allowed use, setbacks and the ability to obtain a driveway that meets county spacing rules¹. If the parcel touches a state highway, state access approval is required before a plat is filed or a county building or use permit is issued¹.

Treat wastewater feasibility as an early purchase contingency because about 6.3% of county soils are rated without severe limitations for a conventional drain field¹¹. A development permit is required before construction or development begins in an area of special flood hazard, and the Planning & Zoning Office administers that process^1,2. Confirm the proposed water use before drilling because a water-right permit may be required and, when required, must be approved before drilling⁵. For carrying costs, the county's effective property-tax rate is about 0.9%, with a median annual property-tax bill of $1,527¹¹.