Building permits, zoning and septic rules in McCook County, South Dakota

Yes. In unincorporated McCook County, the Zoning Administrator must issue a building permit before new development, a change of use, moving in a structure, or another action regulated by the zoning ordinance¹. The landowner must submit the application, required attachments and county fee, including a scaled plan showing lot dimensions, setbacks and existing buildings¹. A permit becomes void if work does not start within 180 days or is suspended or abandoned for 180 days; one extension of up to 180 days may be available on written request¹. South Dakota's building-code default for qualifying nonresidential construction does not replace McCook County's zoning permit^1,9.

McCook County Planning & Zoning administers building permits, rural addresses, plats, conditional uses and variances². Call McCook County Planning & Zoning at 605-425-2681 for application and fee information; the mailing address is PO Box 38, Salem, SD 57058^2,10. The published building-permit fee is 0.1% of project cost plus $50, with project cost including materials and labor¹¹. Starting work before applying doubles the regular application fee, and all applicable fees must be paid before the county acts on an application or appeal¹¹. Variance and conditional-use applications cost $150 each, while an amendment or change of zone costs $250¹¹.

Yes. McCook County zoning covers all unincorporated land except areas approved for municipal joint zoning jurisdiction¹. Inside Salem, the city sets zoning; South Dakota DANR still administers state on-site wastewater requirements^3,12. Uses, structures, lots and yards must meet the applicable district rules, and a noncompliant proposal may need a variance, amendment or conditional-use approval before a building permit can issue¹. The Agricultural district requires at least 1 acre for all uses; a single-family dwelling also requires no other dwelling on the quarter-quarter section, approved public-road access and retention of the remaining land in agriculture or its present use¹. The Lake Residential District has a 9-foot minimum side-yard setback⁷. A manufactured home erected on site must have at least 950 square feet of occupied space and meet federal HUD standards¹.

South Dakota's on-site wastewater rules govern systems in McCook County, but we could not confirm whether the county adds stricter requirements⁵. State plan approval before construction applies to installations receiving human waste other than conventional individual on-site wastewater systems; all systems must follow the state chapter, and a system cannot be installed where public wastewater service is available under the rule⁴. We could not confirm a universal permit or inspection sequence for a conventional residential system, so ask DANR and McCook County Planning & Zoning before installation⁵. DANR's on-site wastewater program can be reached at (605) 773-4647⁵. Only 11.8% of McCook County soils are rated “not limited” for a conventional septic drain field, so evaluate the site early; a low rating does not mean septic is impossible¹³.

McCook County's published zoning districts cover unincorporated land except areas approved for municipal joint zoning jurisdiction, but we could not confirm a specific rule for RV or tiny-home occupancy during construction or afterward¹. Uses and structures must comply with the parcel's district, and a proposal that does not comply may need a variance, amendment or conditional-use approval¹. The confirmed 950-square-foot standard applies specifically to manufactured homes erected on site; it does not answer whether a tiny home or RV may be occupied¹. Before placing either one, call McCook County Planning & Zoning at 605-425-2681 and ask which district covers the parcel and what approval is required¹⁰.

1. Ask McCook County Planning & Zoning to identify the zoning district, allowed use, lot-area rule and applicable setbacks^2,10.
2. Prepare the landowner's building-permit application with the fee, required attachments and a scaled plan showing the lot, setbacks and existing buildings¹.
3. Complete any needed variance, conditional-use or zoning-amendment process before the building permit can issue^1,11.
4. Ask DANR and the county which septic requirements apply, including whether state plan approval is needed, and evaluate the site because only 11.8% of county soils are rated “not limited” for conventional drain fields^4,13.
5. Obtain floodplain approval when applicable and the proper road-access permission before driveway work^14,15,16.
6. Arrange electrical and plumbing permits and inspections before work is covered; state electrical inspection fees for a new single-family service up to 200 amperes are $208^17,18,19.

McCook County gets about 26.5 inches of precipitation a year, with severe drought in roughly 10.8% of years, so confirm a dependable water source before buying¹³. A well needs a water-right permit only when the proposed use triggers one under state law; when required, approval must come before drilling⁸. A test well before water-right approval requires permission from the state chief engineer⁸. Farmland runs about $6,395 an acre, the typical home value is around $300,726, and the effective property-tax rate is roughly 1%, with a median bill around $2,133 a year¹³. Also verify septic suitability, driveway authority and floodplain status before closing^13,14,15.