Bolthole Index

Clay County, South Dakota

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

50Index Score / 100
#23 of 66 in South Dakota

Clay County, South Dakota requires a separate permit before regulated work on a building, structure, fence, hard-surfaced area or excavation in unincorporated areas1. County zoning covers unincorporated land outside approved municipal joint-zoning areas, while local and joint-jurisdiction rules vary elsewhere23. South Dakota sets minimum septic rules, but local governments may impose stricter standards4.

At a glance

Building permit
Required for regulated work in unincorporated areas1
Zoning
Yes; the county ordinance covers unincorporated land outside approved municipal joint-zoning areas23
Permit fee
$75 plus $2 per $1,000 of estimated cost5
Septic
State minimums apply; DANR review generally excludes a conventional system serving one residence46
RV living
A general private-land occupancy rule could not be confirmed; ask County Planning & Zoning7
Additional dwelling
A farmstead may have an additional dwelling, with no more than two dwellings total8
Owner-builder
No county building-permit exemption; a qualifying self-contractor may avoid a state excise-tax license9
Minimum lot
Varies by district; listed residential and agricultural minimums range from 1 to 2 acres10

Who to call

Planning & zoning

Clay County Planning & Zoning

County planning and zoning, building-permit applications, land-use applications and floodplain information

(605) 677-7145

Noah.Westergaard@claycountysd.org

211 W Main St, Suite 205, Vermillion, SD 57069

Septic permits

South Dakota Department of Agriculture and Natural Resources

State onsite-wastewater installation requirements and review of systems that require submitted plans

(605) 773-4647

DANRmail@state.sd.us

523 E Capitol Ave, Pierre, SD 57501-3182

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

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Do you need a building permit in Clay County, South Dakota?

Yes. Clay County requires a separate permit before regulated construction, alteration, moving, demolition, hard surfacing or excavation on unincorporated land11. The published building-permit fee is $75 plus $2 per $1,000 of estimated cost5. A permit expires if work has not begun within 90 days or is not substantially complete within 1 year12. The Zoning Administrator may inspect to enforce the zoning ordinance, but the county materials do not establish a general building-code inspection or completion-inspection program13. International Building Codes were adopted within the joint jurisdiction, but we could not confirm the edition or countywide adoption outside that area14. Ask Clay County Planning & Zoning which standards and closeout steps apply to the parcel7.

Who issues building permits in Clay County, and how do you reach them?

Clay County Planning & Zoning is the first stop for a building permit on unincorporated land7. Reach the office at (605) 677-7145 or Noah.Westergaard@claycountysd.org, or visit 211 W Main St, Suite 205, Vermillion, SD 570697. A complete application includes owner or contractor information, property and project details, building plans, construction cost, zoning district and a signature; state wiring and plumbing inspections apply when required15. The approval path may also involve a conditional use, variance or amendment12. Before preparing plans, ask the office to identify the parcel's district and whether joint-jurisdiction rules apply1637. If land will be divided, resolve final plat approval before the building permit17.

Does Clay County have zoning for setbacks, RVs and tiny homes?

Yes. Clay County zoning applies to unincorporated land outside approved municipal joint-zoning areas, while incorporated and joint-jurisdiction rules may differ23. The county publishes NRC, A-1, RR, C, I-1, I-2 and APO districts, with parcel rules determined by the official map16. Minimum residential lot area varies by district: NRC and A-1 list 2 acres, while RR lists 1 acre10. Listed front, side and rear yards are 75/30/50 feet in A-1 and 30/10/30 feet in RR18. The district table lists no maximum height, subject to the Vermillion-Clay Airport Zoning Ordinance where applicable19. Agriculture is permitted in A-1, but a single-family home still must meet building-eligibility, access and Right to Farm Covenant conditions20.

How do septic permits work in Clay County?

South Dakota DANR administers minimum requirements for onsite wastewater systems, while local governments may impose stricter rules4. DANR review is required before a new onsite system is installed except for a conventional system serving an individual residence4. Plans and specifications must be submitted for a system receiving human waste other than a conventional individual onsite system, and every installer must be certified by the South Dakota Plumbing Commission6. Call DANR at (605) 773-4647 and ask Clay County Planning & Zoning whether local review applies to the parcel217. Only about 6.3% of Clay County soils are rated without severe limitations for a conventional septic drain field, so obtain a site evaluation before assuming a conventional layout will work22. We could not confirm a general inspection rule for every Clay County septic system.

Can you live in an RV or tiny home on your land in Clay County?

A general Clay County rule allowing or prohibiting full-time RV occupancy on private land could not be confirmed. Clay County regulates designated multi-site campgrounds, including review of whether electrical, water and sewer facilities are adequate for the RVs or tents served23. That campground rule does not answer whether one RV may be occupied on a private parcel, so ask Clay County Planning & Zoning for a parcel-specific determination7. A tiny-home-specific occupancy rule and general numeric minimum dwelling size also could not be confirmed; the ordinance's 1,800-square-foot minimum applies only to bed-and-breakfast establishments24. A residence still faces the county permit process, district setbacks and any applicable building eligibility1118. A mobile or manufactured home must conform to the ordinance, have building eligibility where required and meet its district rules25.

How do you build a home in Clay County, step by step?

  1. Confirm with Clay County Planning & Zoning whether county, municipal or joint-jurisdiction zoning governs the parcel37.
  2. Verify the zoning district, residential use, building eligibility, lot size and setbacks before commissioning final plans161018.
  3. If the parcel is being divided, complete the required subdivision and final-plat steps before seeking a building permit17.
  4. Evaluate septic and water feasibility; DANR review depends on the system, and covered water uses need an approved water-right permit before well drilling4626.
  5. Submit the county application with plans, site details and the published fee155.
  6. Confirm the inspection path and arrange applicable state wiring and plumbing inspections1315.
  7. If acting as general contractor solely for your own use, ask the state whether the contractor's excise-tax exemption applies; it does not waive Clay County's building permit911.
  8. Confirm who controls the road entrance: public-road access approval is expressly required for a building-eligibility transfer, while a state-highway approach needs South Dakota DOT permission2728.

What should you check before buying land in Clay County?

Start with jurisdiction because county, municipal and joint-jurisdiction zoning can differ across Clay County3. Confirm the district, building eligibility, minimum lot area and setbacks with Clay County Planning & Zoning before relying on an advertised use1610187. Subdivision plans must comply with the flood-damage ordinance and show mapped floodway and 100-year flood-zone boundaries, but we could not confirm the complete general floodplain building-permit process29. Test septic feasibility early because only about 6.3% of Clay County soils are rated without severe limits for conventional drain fields22. Confirm driveway approval with the government that controls the road because the county source establishes public-road approval only for a building-eligibility transfer27. Clay County's median property-tax bill is about $2,879 per year and its effective property-tax rate is about 1.3%3031.

Watch-outs

  • A Clay County permit expires if work does not begin within 90 days or is not substantially complete within 1 year after issuance12.
  • Agriculture is permitted in A-1, but a home site still needs at least 2 acres plus building eligibility, access approval and a Right to Farm Covenant20.
  • Final subdivision approval must come before the county approves a building permit17.

Sources

  1. Clay County Zoning Ordinance, compiled through Ordinance 2024-04, quoted and re-checked
  2. Clay County Zoning Ordinance, updated through Ordinance No. 2024-04, quoted and re-checked
  3. Zoning - County, quoted and re-checked
  4. One-Stop Permitting and Regulation Guide (2025 Edition), quoted and re-checked
  5. Clay County, South Dakota - Zoning - County, quoted and re-checked
  6. One-Stop Permitting and Regulation Guide (2025 Edition), quoted and re-checked
  7. Clay County Planning & Zoning (claycountysd.org)
  8. Clay County Zoning Ordinance, compiled through Ordinance 2024-04, quoted and re-checked
  9. Self-Contractors, quoted and re-checked
  10. Clay County Building Permit, quoted and re-checked
  11. Clay County Zoning Ordinance, compiled through Ordinance 2024-04, quoted and re-checked
  12. Clay County Zoning Ordinance, updated through Ordinance No. 2024-04, quoted and re-checked
  13. Clay County Zoning Ordinance, compiled through Ordinance 2024-04, quoted and re-checked
  14. Clay County Ordinances, quoted and re-checked
  15. Clay County Building Permit, quoted and re-checked
  16. Clay County Zoning Ordinance, compiled through Ordinance 2024-04, quoted and re-checked
  17. 2014 Revised Subdivision Ordinance of Clay County, South Dakota, quoted and re-checked
  18. Clay County Zoning Ordinance, compiled through Ordinance 2024-04, quoted and re-checked
  19. Clay County Zoning Ordinance, compiled through Ordinance 2024-04, quoted and re-checked
  20. Clay County Zoning Ordinance, updated through Ordinance No. 2024-04, quoted and re-checked
  21. South Dakota Department of Agriculture and Natural Resources (danr.sd.gov)
  22. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  23. claycountysd.org, quoted and re-checked
  24. Clay County Zoning Ordinance, Compiled Through Ordinance 2024-04, quoted and re-checked
  25. Clay County Zoning Ordinance, updated through Ordinance No. 2024-04, quoted and re-checked
  26. South Dakota Water Rights - Drilling a Well, quoted and re-checked
  27. claycountysd.org, quoted and re-checked
  28. Instructions: Applying for permission for driveway or intersection on a South Dakota state highway (South Dakota statewide rule), quoted and re-checked
  29. 2014 Revised Subdivision Ordinance of Clay County, South Dakota, quoted and re-checked
  30. Median property tax bill: Bolthole Index county data
  31. Effective property tax rate: Bolthole Index county data

Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like all 6 of its neighbors, Clay County has countywide zoning.

RuleClay CountyUnion CountyYankton CountyLincoln CountyTurner CountyBon Homme CountyHutchinson County
Building permitRequiredRequiredLimitedRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsDANRSD DANRCounty Planning & ZoningCounty Planning & Zoning Dept.SD DANRDANRDANR

County locator

Clay County in South Dakota

50
County map
Clay County highlighted among the South Dakota counties · colored by Index score

How Clay County scores

Seclusion47100% ev.
Self-Sufficiency29100% ev.
Admin Boringness49100% ev.
Durability47100% ev.
Property Autonomy67100% ev.
Carry Cost68100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$292kTypical home
1.3%Property tax
$7,445Land / acre
28"Annual rain
18.6% of yrsSevere drought
12.3 / yr (+10.3)Mid-century 100°F days
21.7 daysMid-century dry spell
1.55" (+8.8%)Mid-century 1-day rain
1.59×Wildfire change factor
100%Forward climate coverage
$2,010Home insurance / yr
4% / yrInsurance growth
0.77%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
39,394People within 30 min
934,345People within 2 hr
18,704Radius comparison (15 mi)
37.5People / sq mi
0.6%Federal land
98.2%Land at 15% slope or less
6.3%Soils rated "not limited" for septic (strict USDA rating)
16,427 acWorkable land screen
2.1%Wooded land
61.8 tonsBiomass / forest ac
47.8°FAvg temp

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Cities and towns in Clay County

Inside a city, town or township here, that government usually sets zoning and may issue its own building permits; the county’s rules above cover land outside them.

Bethel Township · Fairview Township · Garfield Township · Glenwood Township · Meckling Township · Norway Township · Pleasant Valley Township · Prairie Center Township · Riverside Township · Spirit Mound Township · Star Township · Vermillion · Vermillion Township · Town of Wakonda

Answers from the rulebook for Clay County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Clay County rules

  • Building permitRequired

    Buildings, structures, fences, hard surfacing, or excavations regulated by Clay County ordinance.

    • A separate permit must be obtained from the Zoning Administrator before the regulated work is undertaken.
    • No permit may issue except in conformity with the ordinance, unless written approval is received for a conditional use or variance.
    • The application must include required attachments and county fees, three copies of scaled plans showing lot dimensions, setbacks, existing buildings, and proposed work, plus any additional information lawfully requested by the Zoning Administrator.
    • A permit expires if work has not begun within 90 days or has not been substantially completed within one year of issuance; further work requires a new permit.
    • The current county fee page lists the building permit fee as $75 plus $2 per $1000.
    • Fees are established by County Commission resolution, are nonrefundable, and applications or appeals receive no action until applicable fees are paid in full.

    building permit fee: 75 USD (plus $2 per $1000) · work commencement deadline: 90 days (permit expires if work has not begun) · substantial completion deadline: 1 year from issuance (permit expires if work has not been substantially completed)

    “No building, structure, fence, hard surfacing or excavation regulated by ordinance of Clay County shall be erected, constructed, enlarged, altered, prepared, moved, improved, removed, converted or demolished unless a separate permit for each building, structure, fence, hard surfacing or excavation has first been obtained from the Zoning Administrator.”
    2 more reviewed findings on this topic
    • Required — Buildings, structures, fences, hard surfacing, and excavations regulated by Clay County ordinance in unincorporated areas.
      “No building, structure, fence, hard surfacing or excavation regulated by ordinance of Clay County shall be erected, constructed, enlarged, altered, prepared, moved, improved, removed, converted or demolished unless a separate permit for each building, structure, fence, hard surfacing or excavation has first been obtained from the Zoning Administrator.”
    • Required — Buildings, structures, fences, hard surfacing, and excavations regulated by Clay County ordinance in unincorporated areas.
      “separate permit [...] first been obtained”
  • Building code adoptedPartial

    The Clay County-City of Vermillion Joint Jurisdiction area.

    • The official county ordinance list identifies Ordinance #11-05 as adoption of International Building Codes within Joint Jurisdiction.
    • The official joint-zoning page identifies the Joint Jurisdiction as a separate area with its own zoning ordinance and process.
    • The source material reviewed did not establish a current countywide building-code adoption outside the Joint Jurisdiction.
    “Adoption of International Building Codes within Joint Jurisdiction”
    One more reviewed finding on this topic
    • Partial — International building-code adoption within the Clay County joint jurisdiction identified in the county ordinance index.
      “#11-05 RE: Adoption of International Building Codes within Joint Jurisdiction”
  • InspectionsLimited

    Inspections conducted by the Clay County Zoning Administrator or authorized representatives to enforce the county zoning ordinance.

    • The ordinance authorizes entry and inspection whenever necessary to enforce provisions of the zoning title.
    • For occupied premises, credentials must be presented and entry requested first.
    • For unoccupied premises, a reasonable effort must first be made to locate the owner or person in control and request entry.
    • If entry is refused, the county must use a lawful remedy, such as an inspection warrant, to secure entry.
    • The source does not establish a countywide building-code inspection program or a required completion inspection.
    “Whenever necessary to make an inspection to enforce any of the provisions of this title, the Zoning Administrator and authorized representatives may enter such building or premises at all reasonable times to inspect.”
    One more reviewed finding on this topic
    • Limited — Projects using the Clay County building permit form.
      “State wiring and plumbing inspections are required, if applicable.”
  • County-wide zoningPresent (with conditions)

    Unincorporated Clay County outside areas approved for municipal joint zoning jurisdiction.

    • The ordinance expressly excludes areas approved for municipal joint zoning jurisdiction.
    • The ordinance states that the most restrictive lawfully adopted requirement governs where requirements conflict.
    “The regulations and zoning district boundaries set forth in this Ordinance shall apply to all unincorporated land within Clay County except those areas which have been approved for municipal joint zoning jurisdiction.”
    One more reviewed finding on this topic
    • Present — County zoning on unincorporated land, excluding areas approved for municipal joint zoning jurisdiction.
      “The regulations and zoning district boundaries set forth in this Ordinance shall apply to all unincorporated land within Clay County except those areas which have been approved for municipal joint zoning jurisdiction.”
  • Local zoningVaries (with conditions)

    Local zoning across Clay County, including county zoning and the separate joint-jurisdiction area around Vermillion.

    • The county zoning ordinance divides the county into seven listed districts: NRC, A-1, RR, C, I-1, I-2, and APO.
    • Clay County and the City of Vermillion jointly administer a separate zoning jurisdiction covering approximately 16 square miles surrounding Vermillion, with its own ordinance, map, and land-use process.
    • Municipal zoning rules may apply within incorporated municipalities.
    “Clay County and the City of Vermillion have a Joint Jurisdiction Zoning agreement that covers approximately 16 square miles surrounding the City of Vermillion. This Jurisdiction has its own unique zoning ordinance, zoning map, and process for the administration of land use regulations.”
    One more reviewed finding on this topic
    • Varies (with conditions) — Aggregate zoning across Clay County, incorporated municipalities, and joint jurisdictions.
      “The regulations and zoning district boundaries set forth in this Ordinance shall apply to all unincorporated land within Clay County except those areas which have been approved for municipal joint zoning jurisdiction.”
  • Zoning districtsPublished (with conditions)

    District designations published in Clay County's current compiled zoning ordinance.

    • The ordinance identifies the following districts: NRC Natural Resource Conservation, A-1 Agricultural, RR Rural Residential, C Commercial, I-1 Light Industrial, I-2 General Industrial, and APO Aquifer Protection Overlay.
    • The ordinance separately provides district regulations and an official zoning map framework.
    • Specific parcel applicability depends on the official zoning map and district-boundary rules.
    “The county is hereby divided into the following districts: NRC Natural Resource Conservation A-1 Agricultural RR Rural Residential C Commercial I-1 Light Industrial I-2 General Industrial APO Aquifer Protection Overlay”
    One more reviewed finding on this topic
    • Published (with conditions) — Clay County zoning districts and district regulations.
      “NRC: Natural Resource Conservation District [...] A-1: Agricultural District [...] RR: Rural Residential District [...] C-1: Commercial District [...] I-1: Light Industrial District [...] I-2: General Industrial District [...] APO: Aquifer Protection Overlay District”
  • Minimum dwelling sizeSpecified

    Residential structures used as bed-and-breakfast establishments under Clay County zoning; this does not establish a general minimum floor area for ordinary dwellings.

    • The 1,800-square-foot minimum applies to a bed-and-breakfast establishment, not expressly to every dwelling.
    • The establishment must be in a residential structure.
    • The use must be incidental to an owner-occupied principal dwelling.
    • No more than five bedrooms may be used for the bed-and-breakfast purpose.
    • The length of stay may not exceed fourteen days during any 120-day consecutive period.
    • The building must meet applicable building codes and zoning requirements.

    minimum overall floor area: >= 1800 square feet (Applies to bed-and-breakfast establishments; no general dwelling minimum was located.)

    “A. Bed and Breakfast establishments shall be limited to a residential structure with an overall minimum of 1,800 square feet of floor area.”
  • Minimum lot sizeSpecified

    County zoning districts in unincorporated Clay County.

    • The applicable minimum varies by district and use.

    NRC lot area: >= 2 acres · A-1 lot area: >= 2 acres · RR lot area: >= 1 acre · L-1 and I-2 lot area: >= 10000 square feet

    “NRC 2 Acres 200 Feet 50 Feet 30 Feet 75 Feet A1 Agricultural 2 Acres 200 Feet 75 Feet 30 Feet 50 Feet RR: Rural Residential 1 Acre 125 Feet 30 Feet 10 Feet 30 Feet”
    2 more reviewed findings on this topic
    • Specified — Single-family dwelling eligibility in the A-1 Agricultural District.
      “Each quarter-quarter section shall have three (3) building eligibilities when all the following conditions are met: a. The lot area shall be a minimum of two (2) acres.”
    • Specified — Residential lots in Clay County's NRC, A-1, and RR zoning districts.
      “All Uses 1 acre 125 feet 30 feet 10 feet 30 feet None*”
  • SetbacksSpecified

    Building setbacks in county zoning districts.

    • The applicable setback varies by zoning district and use.

    NRC front/side/rear yards: 50/30/75 feet · A-1 front/side/rear yards: 75/30/50 feet · RR front/side/rear yards: 30/10/30 feet

    “County ZO Lot Area Lot Width Front Yard Side Yard Rear Yard”
    One more reviewed finding on this topic
  • Building heightSpecified

    Building height in county zoning districts.

    • The ordinance states that maximum height is none in the listed district table, subject to the Vermillion-Clay Airport Zoning Ordinance where applicable.
    “All Uses 2 acres 200 feet 50 feet 30 feet 75 feet None*”
    One more reviewed finding on this topic
  • Manufactured homesLimited

    Mobile/manufactured-home occupancy in county zoning districts.

    • A mobile/manufactured home must conform to Section 3.10.
    • A building eligibility must exist on the parcel where required by the district regulations.
    • Applicable district lot, yard, and other zoning rules continue to apply.
    “Mobile home/manufactured home in conformance with Section 3.10 and a building eligibility shall exist on the parcel”
    One more reviewed finding on this topic
  • Accessory dwellingsLimited

    Additional dwellings within an A-1 agricultural farmstead.

    • The A-1 provision allows an additional dwelling within a farmstead only where there will be no more than two dwellings within the farmstead.
    • The residential structure may be a single-family dwelling, manufactured home, or mobile home.
    • Other districts and municipal joint-zoning areas may have different rules.

    maximum dwellings within farmstead: <= 2 dwellings

    “Additional dwelling within a farmstead (Provided there will be no more than two dwellings within the farmstead and the residential structure may be a single-family dwelling, manufactured home or mobile home)”
    One more reviewed finding on this topic
    • Limited — Additional dwellings within a farmstead under Clay County zoning.
      “Additional dwelling within a farmstead (Provided there will be no more than two dwellings within the farmstead and the residential structure may be a single-family dwelling, manufactured home or mobile home)”
  • Mandatory utility hookupConditional

    Designated campgrounds with more than four campsites.

    • Accessory buildings and electrical, water, and sewer facilities must be adequate for the recreational vehicles or tent camps served.
    • Adequacy is reviewed by the Planning Commission at the conditional-use hearing.
    “Accessory buildings, electrical, water, and sewer facilities shall be designed to provide services adequate for the type of recreational vehicles and/or tent camps to be served.”
  • Agricultural exemptionConditional

    Agricultural uses and agricultural district residences in unincorporated Clay County.

    • Agriculture is a permitted use in the A-1 Agricultural District.
    • A single-family dwelling requires building-eligibility conditions, including a minimum two-acre lot, public-road access approval, retention of the remaining quarter-quarter section as agricultural land or present use, and a Right to Farm Covenant before permit issuance.

    minimum lot area: >= 2 acres

    “A single-family dwelling if the following provisions for building eligibility are met:”
  • Subdividing landRegulated (with conditions)

    Subdivision plats and development in unincorporated Clay County.

    • Preliminary and final plans are reviewed through the Zoning Administrator and Board of County Commissioners.
    • No work, utility installation, or lot sales may occur before final plat approval and recording.
    • No building permits issue until required assurances are filed or road improvements completed.

    preliminary-plan approval period: 3 years (one-year extension may be granted under stated conditions)

    “No work shall be done on the subdivision including the making of any road improvements or installation of any utilities, and no lots sold before the final plat is approved and recorded.”
    One more reviewed finding on this topic
  • Driveway accessLimited

    Entrances from Clay County highways, including driveway entrances requiring the county highway department's driveway application process.

    • The official Clay County Highway page provides an Application for Entrance from a Clay County Highway, identified as a Driveway Application.
    • The opened official page does not state the application's approval criteria, measurements, fees, or exceptions; those details remain unresolved.
    • This claim does not establish a countywide requirement for every driveway or for subdivision access.
    “Application for Entrance from a Clay County Highway (Driveway Application)”
    One more reviewed finding on this topic
    • Limited — Access to a public road when transferring building eligibility between contiguous parcels.
      “Approval has been granted by the appropriate governing entity for access onto a public road.”
  • Building in a floodplainLimited

    Subdivision plans and plats in unincorporated Clay County.

    • Subdivision plans must comply with the Flood Damage Protection Ordinance as amended or revised.
    • Preliminary plans must show floodway and 100-year flood-zone boundaries from FEMA Flood Insurance Rate Maps or a Letter of Map Revision.
    • The reviewed materials did not establish the complete general building permit process for floodplain development.

    flood-zone mapping requirement: 100-year flood zones (FIRM or LOMR delineation)

    “D. Flood Damage Protection Ordinance, as amended or revised.”
    One more reviewed finding on this topic
    • Required — Development in areas of special flood hazard under Clay County's flood-damage-prevention ordinance.
      “Review, approve or deny all applications for development permits required by adoption of this Ordinance.”
  • Permit feesPublished

    County planning and zoning permit applications.

    • The county zoning page labels the schedule as an updated 2026 price chart.

    building permit base fee: 75 USD (plus $2 per $1,000 of estimated cost) · CUP fee: 200 USD · variance application fee: 100 USD · rezone/amendment petition fee: 250 USD · board of adjustment appeal fee: 100 USD · plat application fee: 100 USD

    “Building Permit $75 plus $2 per $1000 CUP $200 Variance Application $100 Rezone/Amendment petition $250 Board of adjustment Appeal $100 Plat application $100”
    One more reviewed finding on this topic
    • Published — Clay County Planning and Zoning fee schedule shown on the county zoning page and building permit forms.
      “Building Permit $75 plus $2 per $1000 CUP $200 Variance Application $100 Rezone/Amendment petition $250 Board of adjustment Appeal $100 Plat application $100”
  • Permit processPartial

    Clay County building permit applications.

    • Applicant provides owner/agent/contractor contact information, property information, development type, description of work, attached building plans, cost of construction, zoning district, and signature.
    • The Zoning Administrator records the file number, permit number, date, action, and explanation.
    • State wiring and plumbing inspections are required if applicable.
    • Permit expiration applies after ninety days without commencement or one year without substantial completion.
    “Completed applications shall be returned to the Zoning Administrator for review. To be considered complete, the application form shall be accompanied by the following additional items:”
    2 more reviewed findings on this topic
    • Published (with conditions) — County building, moving, demolition, rezoning, conditional-use, variance, and plat processes.
      “If the work described in any permit has not begun within ninety days or been substantially completed within one year of the date of issuance, said permits shall expire.”
    • Published (with conditions) — County building, moving, and demolition permit process.
      “To be considered complete, the application form shall be accompanied by the following additional items: 1. Any required attachments and County fees. 2. Three copies of plans drawn to scale”

South Dakota rules that apply here

  • Owner-builder exemptionAvailable (with conditions)

    Electrical wiring permit for an applicant's personal residence in Clay County and elsewhere in South Dakota; this is not a waiver of Clay County's separate zoning/building permit requirement

    • The applicant must not have applied for a permit under the Owner's Exemption in the preceding three years.
    • The applicant must occupy or intend to occupy the residence as the applicant's personal dwelling unit.
    • The applicant may not rent or lease any part of the residence.
    • Only the applicant or the applicant's spouse may perform the wiring.
    • The rule states an effective date of May 26, 2020.
    • A permit used in violation of the rule receives a final subject or final void.

    prior Owner's Exemption application lookback: 3 years · eligible occupancy: applicant's personal dwelling unit · rental or lease of residence: false · persons performing wiring: applicant or applicant's spouse only

    “A permit for wiring a person's residence may only be issued if: (1) The applicant has not applied for a permit under the Owner's Exemption in the last three years; (2) The applicant occupies or intends to occupy the residence as his or her personal dwelling unit; (3) The applicant does not rent or lease any part of the residence; and (4) The applicant or applicant's spouse are the only persons performing the wiring.”
    2 more reviewed findings on this topic
    • Available (with conditions) — A project owner acting as the general contractor on a construction project solely for the owner’s use, for South Dakota contractor’s excise tax purposes; this is not a Clay County building-permit exemption.
      “If your project is solely for your use and you do not intend to sell or lease it, you do not need a contractor’s excise tax license. A project owner acting as the general contractor on their construction project does not owe the contractor’s excise tax on their work.”
    • Available (with conditions) — An individual owner personally installing electrical wiring and fixtures in a residence or farmstead owned and resided in by that individual.
      “an "owner's exemption" as an exemption from licensure requirements”
  • Who permits septicState (with conditions)

    On-site wastewater systems serving property in Clay County, including systems in the county's aquifer protection overlay districts

    • South Dakota state minimum requirements are in SDCL Chapter 34A-2 and ARSD Articles 74:53:01.
    • Local governments may adopt more stringent requirements.
    • In Clay County Aquifer Protection Overlay Zones A and B, new or replacement septic tanks and associated drain fields must conform to South Dakota Department of Environment and Natural Resources regulations.
    • DANR contact/review requirements differ for conventional on-site systems serving an individual residence and other systems receiving human excreta.
    “The authority for regulating on-site wastewater systems is found in SDCL Chapter 34A-2. The regulations are in the ARSD Articles 74:53:01. These regulations are the state’s minimum requirements and standards, but local governments may have more stringent regulations.”
    2 more reviewed findings on this topic
    • State (with conditions) — On-site wastewater systems in Clay County, including individual and small systems, subject to any more stringent local requirements.
      “The authority for regulating on-site wastewater systems is found in SDCL Chapter 34A-2. The regulations are in the ARSD Articles 74:53:01. These regulations are the state’s minimum requirements and standards, but local governments may have more stringent regulations.”
    • State — Individual and small on-site wastewater systems statewide in South Dakota.
      “The authority for regulating on-site wastewater systems is found in SDCL Chapter 34A-2.”
  • Septic permitLimited

    New individual and small on-site wastewater systems, including conventional individual-residence systems and nonconventional systems, in Clay County.

    • DANR should be contacted before installation of any new on-site system except a conventional on-site system serving an individual residence.
    • Plans and specifications must be submitted for any installation receiving human excreta other than a conventional individual onsite system.
    • All installers must be certified by the South Dakota Plumbing Commission.
    • Local governments may impose more stringent requirements.
    “You should contact DANR prior to the installation of any new on-site system except those conventional on-site systems serving an individual residence. DANR will review information about the on-site system to make sure it complies with the regulations.”
  • Off-grid sanitationAllowed (with conditions)

    Unconventional off-grid sanitation systems where a water or electrical system is unavailable statewide.

    • Vault privies, chemical toilets, incinerator toilets, or composting units must be used when a water or electrical system is unavailable.
    • Except for vault privies, all unconventional systems are experimental systems and require plans and specifications submitted to the secretary for approval before installation.
    “all unconventional systems are considered experimental systems”
  • Well permitLimited

    Water-well drilling and proposed water uses statewide in South Dakota.

    • A water-right permit is required only for proposed water uses that fall within the permitting requirements; the official page directs applicants to the Using Water in SD page to determine whether a permit is needed.
    • When a water-right permit is required, state law requires approval before well drilling.
    • The chief engineer may permit construction of a test well before obtaining the water-right permit; the test well may serve as the production well if the application is approved.
    • A water-right permit, when required and approved, provides five years to construct the water-use system and an additional four years to place all water to beneficial use.
    • A well driller's license is required before drilling any well or contracting to drill a well.

    construction period after water-right permit approval: 5 years · period to place water to beneficial use: 4 years

    “If a water right permit is needed, state law requires the permit to be approved prior to doing any well drilling.”
    One more reviewed finding on this topic
    • Limited — Water uses and wells serving Clay County.
      “If a water right permit is needed, state law requires the permit to be approved prior to doing any well drilling.”
  • county zoning authorityGeneral

    South Dakota county boards' authority to adopt zoning ordinances, including for unincorporated county land.

    • The authority is granted for promoting the health, safety, or general welfare of the county.
    • The statute authorizes regulation of building and land-use characteristics including height, number of stories, building and structure size, lot coverage, yards, courts, open spaces, population density, and locations and uses of buildings, structures, and land.
    • The authorized purposes expressly include trade, industry, residence, flood plain, and other purposes.
    • This claim identifies statewide enabling authority; whether a particular county has adopted an ordinance is a separate local question.
    “For the purpose of promoting health, safety, or the general welfare of the county the board may adopt a zoning ordinance to regulate and restrict the height, number of stories, and size of buildings and other structures, the percentage of lot that may be occupied, the size of the yards, courts, and other open spaces, the density of population, and the location and use of buildings, structures, and land for trade, industry, residence, flood plain, or other purposes.”
  • county building authorityLimited

    County authority to prescribe building standards and issue building permits for construction in South Dakota, including unincorporated areas.

    • Section 11-10-5 expressly addresses ordinances adopted by any local unit of government, and expressly provides for amendments to a county ordinance filed with the county auditor.
    • That provision concerns buildings other than residential structures as defined in § 11-10-12.
    • Section 11-10-12 expressly authorizes a municipality to enact residential-structure requirements using the 2024 International Residential Code, rather than expressly extending that authorization to counties.
    • A county, municipality, or township may not require permits for specified repairs or substantially similar replacements to existing exterior parts of a detached single-family owner-occupied residential structure, except designated historical property repairs authorized under chapter 1-19B.
    • Construction under the default § 11-10-6 standard is subject to the residential, manufactured-home, farmstead, accessory-structure, and specialty-resort exclusions stated there.

    nonresidential code: 2024 International Building Code (County ordinances may amend, modify, or delete portions before enactment; HUD-compliant mobile or manufactured homes and specified Group R-3 specialty resorts or vacation home establishments are excluded; no single-family dwelling fire sprinkler may be required.) · permit exemption effective date: 2026 (Applies to listed repairs and substantially similar replacements of existing exterior parts.)

    “Additional deletions, modifications, and amendments to the county ordinance may be made by the governing body and are effective upon their adoption and filing with the county auditor. [...] Notwithstanding any authority granted to a county, municipality, or township to prescribe building codes or standards or to issue building permits, a county, municipality, or township may not require a building permit for the repair or substantially similar replacement of any of the following existing exterior parts of a detached single-family owner-occupied residential structure:”

Set by your township or city, not the county

In South Dakota, zoning is adopted by each township or city, so Clay County has no county-wide answer on these. Find your township or city in the list of places on this page, or call its clerk or zoning administrator.

  • Lot coverage
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Short-term rentals

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Certificate of occupancy — Certificates of occupancy in Clay County.
  • Septic inspection — Inspection requirements for onsite wastewater systems in Clay County.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Clay County, South Dakota

Is Clay County a good place to live off-grid or homestead?

Clay County scores 50/100 on the Bolthole Index, a solid county profile. Its strengths: manageable long-term carry cost and a stronger property-autonomy legal backdrop. Watch-outs: workable self-sufficiency basics (28″/yr rainfall).

Do you need a building permit in Clay County, South Dakota?

Clay County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by South Dakota Department of Agriculture and Natural Resources (DANR). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Clay County, South Dakota?

Land in Clay County runs about $7,445 per acre, based on the latest county data.

What is the water situation in Clay County?

Clay County gets about 28" of rain a year, with severe drought in roughly 18.6% of years.

How remote is Clay County?

A representative private-land location has about 39,394 people within a 30-minute drive and 934,345 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Clay compares in South Dakota

Compare side-by-side →See all 66 South Dakota counties ranked →