Bolthole Index

Walworth County, South Dakota

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

47Index Score / 100
#40 of 66 in South Dakota

Unincorporated Walworth County, South Dakota requires a county building permit and applies county zoning.12 Start with Walworth County Planning & Zoning before choosing a house site or ordering materials.3 South Dakota regulates onsite wastewater systems, while the exact approval path for a conventional residential septic system should be confirmed with the county zoning office and DANR.4

At a glance

Building permit
Required by Walworth County1
Zoning
County zoning applies in unincorporated areas2
Septic
State rules apply; confirm project-specific approval before installation4
RV living
Long-term occupancy rules are not confirmed; ask Planning & Zoning3
Tiny homes
No general occupancy or minimum-size rule confirmed; ask Planning & Zoning3
Owner electrical work
Qualifying owner-occupants may wire their own residence or farmstead with a homeowner permit and inspections5
Domestic well
A water-right permit is generally not required below the state domestic-use thresholds6

Who to call

Planning & zoning

Walworth County Planning & Zoning

County building permits and zoning for unincorporated Walworth County

(605) 649-7602

[email protected]

PO Box 292, Selby SD 57472-0292

Septic permits

South Dakota DANR On-Site Wastewater Systems

State rules and plan-review questions for individual and small onsite wastewater systems

(605) 773-4647

[email protected]

523 E Capitol Ave, Pierre, SD 57501-3182

Contact details are copied from each office’s official page and were checked against it on September 28, 2026.

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

Yes. Unincorporated Walworth County administers a county building-permit program through Planning & Zoning.1 The county page provides both building-permit guidelines and a Walworth County Building Permit Application.3 Contact the zoning office before site work so staff can match the parcel and proposed use to the current ordinance and application.3

A county permit does not settle every trade requirement. South Dakota requires plumbing inspection certificates for covered plumbing installations outside cities that run their own inspection programs.7 State-regulated electrical work also has permit and inspection steps, including rough-in inspection before wiring is covered and final inspection before occupancy.8 The county materials do not confirm a general county building-code adoption or a separate certificate-of-occupancy rule, so ask Planning & Zoning which construction standards and closeout documents apply to the specific project.3

Who issues building and zoning permits in Walworth County?

Walworth County Planning & Zoning is the starting office for county building permits and zoning questions on unincorporated land.3 The office lists a building-permit application, building-permit guidelines, the county zoning ordinance, and a zoning map on its official page.3 Call the office at the listed number or send materials to its Selby mailing address.3

Ask the office to confirm the parcel's zoning district, allowed use, setbacks, application documents, fees, and whether a conditional-use review is needed before committing to a building location.3 The available county material confirms county zoning and a building-permit program but does not confirm one universal answer for setbacks, lot coverage, or permit fees across every parcel.12 If the land is inside a city, contact that municipality because the county claim here is specifically for unincorporated Walworth County.2

Does Walworth County have zoning?

Yes. Walworth County zoning applies to unincorporated areas, and the county publishes its zoning ordinance and zoning map through Planning & Zoning.23 That makes the parcel's mapped district the first screen for a house, manufactured home, agricultural building, accessory structure, or other proposed use.3

South Dakota law allows counties to regulate building size, lot occupancy, yards, open space, density, and the location and use of buildings and land, but that statewide authority does not itself establish Walworth County's parcel-specific limits.9 The county materials do not confirm a general minimum home size, a universal setback, a lot-coverage limit, or an accessory-dwelling rule. Ask Planning & Zoning for a written district determination before relying on a seller's description of what can be built.3 Agricultural status also should not be treated as a blanket exemption from county zoning or permitting.10

How do septic permits work in Walworth County?

South Dakota DANR sets the rules for individual and small onsite wastewater systems, including systems in Walworth County.4 DANR identifies the governing state rule chapter, and installer certification is administered through the South Dakota Plumbing Commission.4 Contact DANR and Walworth County Planning & Zoning before installation because the exact permit or approval path for a conventional residential system is not confirmed for every project.113

Site conditions still matter even where a conventional design is possible: about 60.6% of county soils are rated without severe limits for a conventional septic drain field.12 Treat that countywide figure as a screening signal, not a parcel soil test. Off-grid projects also remain regulated; when water or electricity is unavailable, state rules identify specified unconventional sanitation options, and experimental systems require plan approval before installation.13

Can you live in an RV or tiny home in Walworth County?

Walworth County's published materials do not provide a confirmed countywide answer for long-term RV occupancy, temporary camping, tiny-home occupancy, or a general minimum dwelling size on unincorporated private land. Ask Walworth County Planning & Zoning how the parcel's district treats the proposed unit and use before moving an RV onto the site or buying a tiny home.3

A small or movable structure is not automatically outside the permit system: Walworth County requires building permits and applies zoning in unincorporated areas.12 Describe whether the unit has wheels, a foundation, sleeping space, plumbing, and year-round occupancy when contacting the office, because those details let staff identify the relevant application and zoning category.3 For off-grid sanitation, South Dakota allows specified alternatives when water or electrical service is unavailable, but most unconventional systems are treated as experimental and require approval before installation.13

Building a home in Walworth County: what are the steps?

  1. Ask Walworth County Planning & Zoning to confirm that the parcel is in unincorporated county jurisdiction, identify its zoning district, and explain the building-permit application.3
  2. Set the house, driveway, well, and septic concept on one site plan, then confirm applicable setbacks and reviews with the county.3
  3. Resolve wastewater design with DANR and the county before installation; South Dakota regulates individual and small onsite systems.4
  4. Determine whether the proposed domestic well stays within the state exemption or needs a water-right permit before drilling.6
  5. Obtain the required state plumbing and electrical paperwork and schedule inspections before work is covered.78
  6. If the driveway connects to a state highway, obtain South Dakota Department of Transportation permission before construction.14
  7. Before occupancy, complete the required final electrical inspection and ask Planning & Zoning what county closeout documentation applies.153

What should you check before buying land in Walworth County?

Start with the zoning map and a parcel-specific discussion with Walworth County Planning & Zoning; county zoning applies in unincorporated areas.2 Verify legal access and determine whether a proposed driveway meets a county road or a state highway, because new or modified state-highway access requires state permission before construction.14

For water, domestic use generally avoids a water-right permit unless use exceeds 25,920 gallons per day or a peak pumping rate of 25 gallons per minute.6 For wastewater, allow room for a site evaluation because only about 60.6% of county soils are rated without severe limits for a conventional drain field.12 Check flood mapping and ask the local administrator whether the site is in a regulated floodplain; participating South Dakota communities require permits for floodplain development, but the unincorporated county's exact process is not confirmed here.16 Finally, budget around an effective property-tax rate of about 1.4%, while recognizing that the actual bill depends on assessment and classification.17

Watch-outs

  • Do not assume a farm or ranch building skips local review; the state farmstead exclusion concerns a specific default design standard and does not waive county zoning or building permits.10
  • A qualifying owner may perform electrical work only under the state owner exemption, with a homeowner permit and required inspections; the exemption is not a county building-permit waiver.5
  • Walworth County RV, tiny-home, minimum-size, and county floodplain procedures remain parcel-specific questions for Planning & Zoning.3

Sources

  1. Walworth County (SD) Planning & Zoning (2026 county census)
  2. Planning & Zoning, quoted and re-checked
  3. Walworth County Planning & Zoning (walworthco.org)
  4. South Dakota Feedlot Permit Program - Septic Tank Systems, quoted and re-checked
  5. South Dakota Electrical Commission - Homeowner Wiring (South Dakota statewide rule), quoted and re-checked
  6. Drilling a Well - Where to start, quoted and re-checked
  7. South Dakota Plumbing Commission - Inspections (South Dakota statewide rule), quoted and re-checked
  8. South Dakota Electrical Wiring Rules Bulletin (South Dakota statewide rule), quoted and re-checked
  9. 2000 Session Laws Chapter 69 — Planning and zoning statutes revised (South Dakota statewide rule), quoted and re-checked
  10. South Dakota Codified Law Chapter 11-10: Building Codes and Standards (South Dakota statewide rule), quoted and re-checked
  11. South Dakota DANR On-Site Wastewater Systems (danr.sd.gov)
  12. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  13. Administrative Rule 74:53:01 — Individual and Small On-Site Wastewater Systems (South Dakota statewide rule), quoted and re-checked
  14. Instructions: Applying for permission for driveway or intersection on a South Dakota state highway (South Dakota statewide rule), quoted and re-checked
  15. South Dakota Electrical Commission - Homeowner Wiring (South Dakota statewide rule), quoted and re-checked
  16. National Flood Insurance Program (South Dakota statewide rule), quoted and re-checked
  17. Effective property tax rate: Bolthole Index county data

Written September 28, 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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County locator

Walworth County in South Dakota

47
County map
Walworth County highlighted among the South Dakota counties · colored by Index score

How Walworth County scores

Seclusion88100% ev.
Self-Sufficiency1998% ev.
Admin Boringness49100% ev.
Durability37100% ev.
Property Autonomy67100% ev.
Carry Cost87100% ev.

Evidence strength: 99%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$141kTypical home
1.4%Property tax
$2,513Land / acre
19.6"Annual rain
10.2% of yrsSevere drought
9.4 / yr (+7.6)Mid-century 100°F days
21 daysMid-century dry spell
1.38" (+8.7%)Mid-century 1-day rain
1.45×Wildfire change factor
100%Forward climate coverage
$1,590Home insurance / yr
2.2% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
782People within 30 min
86,224People within 2 hr
2,136Radius comparison (15 mi)
7.4People / sq mi
20.1%Federal land
97.1%Land at 15% slope or less
60.6%Septic soil without severe limits
259,230 acWorkable land screen
0.7%Wooded land
9.6 tonsBiomass / forest ac
43.7°FAvg temp

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Answers from the rulebook for Walworth County

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

Walworth County rules

  • County-wide zoningPresent

    Zoning regulation in the unincorporated areas of Walworth County.

    “Walworth Co Zoning Ordinance Adopted Amended 10-15-24”
  • Building permitRequired

    Walworth County Planning & Zoning provides a county Building Permit Application and administers building permits under its zoning ordinance.

    Walworth County (SD) Planning & Zoning ↗Scouted from the county site, not yet independently re-checked

South Dakota rules that apply here

  • Owner-builder exemptionAvailable (with conditions)

    An individual owner personally installing electrical wiring and fixtures in a residence or farmstead owned and resided in by that individual.

    • The exemption is from electrical licensure requirements, not from permitting or inspection.
    • An approved homeowner permit must be obtained before electrical work begins.
    • The exemption does not apply to commercial or rental property.
    • Mobile-home and modular-home installations are allowed only when the unit is on an owner-occupied lot at the time of installation; otherwise a licensed South Dakota electrical contractor is required.
    • A final inspection is required before occupancy.
    “an "owner's exemption" as an exemption from licensure requirements”
  • InspectionsRequired

    Plumbing installations in South Dakota outside cities that administer their own plumbing inspection requirements.

    • The exception is for cities with their own inspection requirements.
    • Inspection requests generally require at least 72 hours advance notice, excluding weekends and holidays.
    • Inspections occur after a plumbing installation certificate is secured.

    installation certificate fee: 20 USD · single-family inspection fee: 110 USD · small-structure inspection fee: 100 USD (Five or fewer fixtures.) · large-structure inspection fee: 275 USD (Six or more fixtures.)

    “You must have a plumbing inspection certificate for all plumbing installations.”
    One more reviewed finding on this topic
  • Who permits septicState

    South Dakota regulation of individual and small on-site wastewater systems, including Walworth County.

    • South Dakota DANR identifies Chapter 74:53:01 as the governing state rule chapter.
    • Installer certification is administered through the South Dakota Plumbing Commission.
    “South Dakota's regulations for on-site wastewater systems are found in the Administrative Rules of South Dakota, Chapter 74:53:01 at this link.”
    One more reviewed finding on this topic
    • 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.”
  • 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-right permitting for wells and groundwater uses serving property in Walworth County.
      “The only type of water use which does not require a water right permit is domestic use. However, even domestic use of water requires a permit if your water use exceeds either 25,920 gallons per day or a peak pump rate of 25 gallons per minute.”
  • Agricultural exemptionAvailable (with conditions)

    Farmsteads and accessory structures or buildings thereto under South Dakota's default construction-design standard when the local unit of government has not adopted an ordinance prescribing standards under SDCL 11-10-5.

    • The default standard applies to building work commenced after July 1, 2026.
    • The local unit of government may adopt an ordinance allowing local administration and enforcement of the design standard.
    • The exclusion is from SDCL 11-10-6's default 2024 International Building Code design standard; it does not establish that all local zoning, building, occupancy, or other requirements are waived.
    • The statute defines farmstead as a farm or ranch, including any structure or building located on the land.
    • Residential structures and mobile or manufactured homes are also excluded from this specific default-standard provision.

    construction commencement date: > 2026-07-01 (The provision applies to buildings commenced after July 1, 2026.) · building standard: 2024 International Building Code (The default standard does not apply to a farmstead or accessory structure or building thereto.)

    “farmstead and any accessory structure or building thereto.”
  • Driveway accessLimited

    New or modified driveways and intersections connecting to South Dakota state highways.

    • Permission from the South Dakota Department of Transportation is required for access to a state highway.
    • The application may require an access approach design, vicinity map, estimated traffic volumes, three copies of a site plan, traffic-control plan, liability insurance, development plan, drainage plan, traffic-impact study, and revegetation plan.
    • Construction cannot begin until the access permit is issued.
    • The permittee pays construction, maintenance, and removal costs.
    • The permit expires if access is not under construction within one year, subject to one written one-year extension.
    • Access construction must be completed within 45 days after initiation within the highway right-of-way.

    application review update threshold: 30 days (If the application is not completed within 30 days, a Department employee will contact the applicant with an update.) · construction completion period: 45 days (Measured from initiation of construction within the highway right-of-way.)

    “Construction of the access shall not proceed until the access permit is issued. The access shall be completed in an expeditious and safe manner and shall be finished within 45 days from the initiation of construction within the highway right-of-way.”
  • Building in a floodplainRequired

    Development in floodplains within South Dakota communities participating in the National Flood Insurance Program, including incorporated and unincorporated areas administered separately by local governments.

    • Participating communities must adopt and enforce a flood-damage-prevention ordinance.
    • Permits are required for all types of development in the floodplain.
    • New or substantially improved homes and manufactured homes must be elevated above the Base Flood Elevation.
    • Non-residential buildings must be elevated or flood-proofed.
    • Elevation Certificates are required to document compliance.
    • NFIP participation and eligibility are established separately for incorporated and unincorporated areas; the source does not establish a single uniform permit process for every South Dakota location.
    “Require permits for all types of development in the floodplain.”
  • Permit feesPublished (with conditions)

    South Dakota state electrical wiring permits, including residential and farmstead wiring subject to state administration.

    • A wiring permit is required for electrical service entrances over 60 amperes, owner-exemption wiring, and other installations with an estimated inspection fee of at least $30.
    • Local inspection systems may have their own procedures, inspection fees, and regulations.
    • Inspection fees are separate from the $20 wiring-permit fee.

    wiring permit fee: 20 USD · permit validity: 3 years (A new permit is required if the installation extends beyond three years.) · late permit administrative fee: 250 USD (Applies when the permit is not dated at job start or is not renewed before expiration.)

    “A wiring permit may be obtained for twenty dollars from the commission office. A wiring permit is valid for three years from the date the permit is issued.”
  • Permit processPublished (with conditions)

    South Dakota state electrical wiring permits and inspections.

    • The installer must send the white permit copy to the Commission within 15 calendar days after starting the installation.
    • The permit hard copy must be posted at the job site when electrical work starts.
    • At least 72 hours' notice is required before inspection.
    • A rough-in inspection must occur before wiring is covered, and a final inspection is required before occupancy.
    • Homeowner permits are limited to qualifying owner-occupied residences or farmsteads and cannot be used for commercial or rental property.

    white permit copy submission deadline: 15 calendar days after starting installation · inspection notice: >= 72 hours

    “Within fifteen calendar days after starting an electrical installation, the installer shall send the white copy to the office of the commission.”
  • 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.”

Still unanswered

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

  • Building code adopted — General building-code adoption in unincorporated Walworth County.
  • Certificate of occupancy — Certificate-of-occupancy requirements in unincorporated Walworth County.
  • Minimum dwelling size — Minimum dwelling size in unincorporated Walworth County.
  • Lot coverage — Lot-coverage limits in unincorporated Walworth County.
  • Living in an RV — Residential or long-term RV occupancy on private land in unincorporated Walworth County.
8 more unanswered
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Septic permit
  • Septic inspection
  • Mandatory utility hookup
  • Subdividing land
  • Short-term rentals

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 Walworth County, South Dakota

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

Walworth County scores 47/100 on the Bolthole Index, a solid county profile. Its strengths: deep seclusion — about 782 people within a 30-minute drive and manageable long-term carry cost. Watch-outs: thin water margin (19.6″/yr rainfall) and elevated current hazard exposure.

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

Walworth 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 Walworth County, South Dakota?

Land in Walworth County runs about $2,513 per acre, based on the latest county data.

What is the water situation in Walworth County?

Walworth County gets about 19.6" of rain a year, with severe drought in roughly 10.2% of years.

How remote is Walworth County?

A representative private-land location has about 782 people within a 30-minute drive and 86,224 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.

Off-grid gear

Going off-grid in Walworth County means bringing your own water and power. The kit we’d start with:

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How Walworth compares in South Dakota

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