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

Yes. Unincorporated Union County requires a separate building permit for each regulated building, structure or land-use change, and a zoning permit is required before a change of use or occupancy¹. Applications go to Planning and Zoning, identify the work and property, and undergo review by the Planning Director and any department with jurisdiction¹. Fees must be paid before issuance, but we could not confirm current amounts; ask Planning and Zoning for the fee schedule^1,2. The ordinance allows authorized personnel to inspect for zoning enforcement, but we could not confirm routine county construction inspections or a general certificate-of-occupancy process^2,4.

Union County Planning and Zoning is the first stop for a building permit, zoning question or proposed subdivision in unincorporated Union County^1,2,7. Call 605-356-3354 or visit 209 E. Maint Street, Suite 100, Elk Point, SD 57025². The county page provides the building-permit application as well as variance and conditional-use forms². Before preparing plans, give the office the parcel location and intended use and ask which zoning district controls; the county ordinance includes Agricultural, Rural Residential, Commercial, Light Industrial, Heavy Industrial, Floodplain Conservation and Planned Development districts¹. Incorporated municipalities and municipal joint-zoning areas may follow different rules, so confirm the governing jurisdiction before applying¹.

Yes. Union County administers zoning for unincorporated land, with district-specific use and development standards; that does not establish what an incorporated municipality regulates^1,4. In the Agricultural District, the stated yards are 50 feet in front, 20 feet at the side and 30 feet at the rear¹. The Agricultural District ordinarily caps structures at 35 feet and requires a conditional-use permit above that height, with stated exceptions for farm structures and wind-energy systems outside an airport approach zone¹. Open-space requirements also vary: the Energy Center Planned Development District requires at least 60 percent usable open space, while its Industrial Transition Zone requires at least 80 percent¹. We could not confirm a countywide minimum dwelling size, accessory-dwelling rule or broad agricultural permit exemption; ask Planning and Zoning about the specific parcel and use².

South Dakota DANR administers statewide on-site wastewater requirements, and local governments may impose stricter standards³. DANR publishes the installation requirements and directs system-plan questions to its on-site wastewater program⁸. We could not confirm who issues a permit or requires an inspection for every conventional residential system in Union County, so ask Planning and Zoning and DANR what review applies before fixing the house location or hiring an installer^2,8. Only about 24.9% of Union County soils rate without severe limitations for a conventional drain field, making septic feasibility an important early contingency⁹. South Dakota treats unconventional sanitation systems other than vault privies as experimental and requires plans and specifications to be approved before installation¹⁰.

We could not confirm a Union County rule that specifically allows or prohibits long-term RV occupancy, temporary camping or tiny-home occupancy on private land; ask Planning and Zoning about the parcel, zoning district and proposed utilities before buying². A tiny home is not automatically outside the local process because unincorporated Union County requires permits for regulated buildings and land-use changes and applies county zoning¹. Manufactured homes have a conditional path: qualifying units must have been constructed on or after July 15, 1976, have an exterior dimension of at least 24 feet excluding overhangs, extend foundation walls and piers at least 42 inches below final grade, and have a roof pitch of at least 3 in 12¹.

1. Confirm that the site is in unincorporated Union County rather than a municipality or municipal joint-zoning area, then ask Planning and Zoning for its district and permitted-use rules^1,2.
2. Confirm legal road access; county building-eligibility provisions require approval from the appropriate governing entity for access to a public road¹¹. For a county highway, the Highway Department publishes an access-permit application, while a state-highway connection needs state permission before construction^6,12.
3. If dividing land, confirm platting and subdivision review before setting parcel lines; manufactured-home subdivisions must meet district rules and cover at least 20 acres⁷.
4. Apply through Planning and Zoning with the work and property information needed for the Planning Director's compliance review¹.
5. Confirm septic review, then obtain required state electrical and plumbing approvals^3,5,13.

Access: contact the Union County Highway Department at (605) 356-2351 at 501 E. Pleasant Street, Elk Point, SD 57025-2159 for a county-highway access application⁶. Flood risk: development in a regulated floodplain requires a permit in participating South Dakota communities, so ask Planning and Zoning who administers floodplain review for the parcel^2,14. Soils: about 24.9% of county soils rate without severe limitations for a conventional drain field, so test septic feasibility before committing to a building envelope⁹. Water: some proposed uses require a state water-right permit approved before drilling, while certain domestic uses may not; confirm the proposed use with DANR¹⁵. Taxes: the effective property-tax rate is about 1.1%, and the median annual property-tax bill is about $2,997⁹.