Buffalo County, SD: No Building Permit, No Zoning

Unincorporated Buffalo County, South Dakota has no confirmed residential building-permit process, so ask the County Auditor before starting a home, addition or structural alteration^1,2. The statewide default building standard covers qualifying nonresidential work but excludes homes, manufactured homes and farmsteads³. South Dakota DANR sets the minimum septic rules, although conventional individual residential systems do not require advance state plan review^4,5.

At a glance

Building permit: No confirmed county process published; ask the County Auditor before new work^1,2
Zoning: No operative countywide zoning ordinance confirmed; ask the County Auditor¹
Septic: DANR sets minimum rules; conventional individual residential systems need no advance state plan review^5,6
State building standard: 2024 IBC default covers qualifying nonresidential work where no local ordinance exists; homes, manufactured homes and farmsteads are excluded⁷
Farmstead buildings: Excluded from the state default building standard, but local rules may still apply⁷
Owner-builder electrical: Homeowner wiring exemption available; a permit and inspections are still required⁸
Off-grid sanitation: Vault privies may be used where water or power is unavailable; most other unconventional systems need DANR approval⁵
State-highway driveway: SDDOT access permit required before construction⁹

Who to call

Also useful

Buffalo County Auditor

County records, commission meeting scheduling and agendas, the county budget, and the general point of contact for Buffalo County government; also serves as Register of Deeds

605-293-3217

Roads & driveways

Buffalo County Highway Department

County road maintenance; the office to contact about access to or condition of a county road

(605) 293-3263

One more officeSeptic permits

Septic permits

South Dakota DANR On-Site Wastewater Systems Program

Statewide septic tank / on-site wastewater system design requirements, plan review and installer certification that apply to Buffalo County, which has no county health or septic department of its own

(605) 773-4647

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

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

Buffalo County does not publish a confirmed residential building-permit process or identify who conducts residential inspections.

Buffalo County does not publish a confirmed residential building-permit process or identify who conducts residential inspections¹. Ask the County Auditor about a new home, addition, structural alteration, inspection or occupancy approval before work begins². South Dakota law does give a firm answer for a narrow repair category: a local government may not require a building permit for listed substantially similar exterior repairs to a detached, owner-occupied single-family home, although other rules and the historic-property exception still apply⁷. For qualifying nonresidential construction begun after July 2026 where no local code ordinance exists, the state default is the 2024 International Building Code³. Homes, manufactured homes, farmsteads and farmstead accessory buildings are outside that default; the exclusion does not itself override a valid local requirement⁷.

Who handles building and zoning questions in Buffalo County, and how do you reach them?

Buffalo County does not identify a building department or publish a residential permit application.

Buffalo County does not identify a building department or publish a residential permit application¹. The Buffalo County Auditor is the practical first call because the office keeps county records and supports County Commission business². Reach the Auditor at 605-293-3217 and ask specifically about building permits, inspections, occupancy approval and any code ordinance filed with the office². South Dakota's default 2024 International Building Code standard does not prove that Buffalo County adopted or locally enforces a code; it supplies the design standard for qualifying nonresidential work when a local government has no ordinance of its own⁷. For access to or conditions on a county road, call the Buffalo County Highway Department at (605) 293-3263¹⁰. A driveway connecting to a state highway instead requires an SDDOT access permit before construction⁹.

Does Buffalo County have zoning?

We could not confirm an operative countywide zoning ordinance for Buffalo County.

We could not confirm an operative countywide zoning ordinance for Buffalo County¹. South Dakota law allows a county commission to regulate building height, lot coverage, yards, population density and land use in unincorporated areas¹¹. The available rules therefore do not establish a setback, minimum lot size, minimum home size or placement rule for unincorporated Buffalo County. Do not read the absence of a published ordinance as permission for every use. Ask the Buffalo County Auditor whether the County Commission has adopted zoning, subdivision or siting rules before laying out a home, splitting land, or placing a manufactured home². State law separately requires certain land divisions to be platted and recorded before an instrument of transfer can be recorded¹².

How do septic permits work in Buffalo County?

South Dakota DANR sets the statewide minimum requirements for on-site wastewater systems in Buffalo County, while local governments may adopt stricter rules.

South Dakota DANR sets the statewide minimum requirements for on-site wastewater systems in Buffalo County, while local governments may adopt stricter rules⁶. A conventional individual residential system may be designed and installed under the rules without advance DANR plan review; systems receiving human waste other than a conventional individual system require plans and specifications to be approved before construction⁵. DANR or an authorized representative may inspect a system after installation¹³. Only 21.4% of Buffalo County soils are rated without severe limits for a conventional drain field, so obtain a site evaluation before assuming a standard layout will work¹⁴. Where water or electricity is unavailable, most unconventional toilets are experimental systems requiring state approval; vault privies are the exception⁵. DANR's on-site wastewater program can be reached at (605) 773-4647⁴.

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

We could not confirm Buffalo County rules for long-term RV occupancy, temporary camping or tiny-home occupancy.

We could not confirm Buffalo County rules for long-term RV occupancy, temporary camping or tiny-home occupancy¹. The lack of a confirmed zoning ordinance or building department does not establish that an RV or tiny home is either allowed or prohibited as a residence. Before placing a tiny home, RV or manufactured home, ask the Buffalo County Auditor about current zoning, siting, sanitation and occupancy rules². An off-grid toilet does not settle the land-use question: where water or electricity is unavailable, vault privies may be used, while chemical, incinerating and composting toilets generally require DANR approval as experimental systems⁵. If the property will operate as a qualifying vacation home or other short-term lodging establishment, a state lodging license and separate health requirements may apply; that license is not county zoning approval¹⁵.

Building a home in Buffalo County: the steps, in order

Call the Buffalo County Auditor at 605-293-3217 and ask whether your parcel and project need a building permit, inspection, occupancy approval, zoning clearance or subdivision review.

Call the Buffalo County Auditor at 605-293-3217 and ask whether your parcel and project need a building permit, inspection, occupancy approval, zoning clearance or subdivision review².
If the project is a farmstead building, confirm local requirements even though farmsteads are excluded from the statewide default building standard⁷.
Have the site and septic design evaluated; conventional individual residential systems follow the statewide rules without advance DANR plan review, while other systems require state approval before construction⁵.
For a domestic well, a state water-right permit generally is not needed unless use exceeds 25,920 gallons per day or the peak rate exceeds 25 gallons per minute¹⁶.
A qualifying resident owner may do the wiring, but only the owner or spouse may perform it, the home may not be rented, and an electrical permit is still required⁸.
Obtain an SDDOT access permit before constructing a driveway onto a state highway; ask the Buffalo County Highway Department about county-road access^9,10.
Disturbing one acre or more can trigger state construction-stormwater coverage and fees¹⁷.

What to check before you buy land in Buffalo County

Before buying, obtain a septic site evaluation: only 21.4% of Buffalo County soils are rated without severe limits for a conventional drain field.

Before buying, obtain a septic site evaluation: only 21.4% of Buffalo County soils are rated without severe limits for a conventional drain field¹⁴. Check whether the driveway would meet a state highway or a county road, because the responsible road authority changes; SDDOT must issue an access permit before construction begins on a state-highway approach^9,10. We could not confirm Buffalo County's floodplain permit process, so ask the County Auditor before building near a drainage or the Missouri River². Buffalo County's effective property tax rate is about 0.8%, with a median annual bill of $843¹⁴. The county has about 4 people per square mile and roughly 1,884 residents, while the nearest city of 100,000 or more is about 127 miles from the county center¹⁴.

Watch-outs

Buffalo County does not publish a confirmed residential permit or inspection process, so ask the County Auditor about new construction, additions and structural work before relying on the absence of a listed building office^1,2.
We could not confirm whether Buffalo County's unincorporated area participates in the National Flood Insurance Program or who administers local floodplain permits, so ask the County Auditor before building near a drainage or the Missouri River^2,18.
We could not confirm Buffalo County's rules for living in an RV or tiny home on private land, so ask the County Auditor before moving one onto your land as a residence^1,2.

Sources

18 official pages, each quoted and re-checked · written October 10, 2026

Written October 10, 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.

Off-grid gear

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

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

Compared with neighboring counties

Unlike all 6 of its neighbors, Buffalo County requires no county building permit for a home.

Rule	Buffalo County	Brule County	Hand County	Jerauld County	Lyman County	Hyde County	Aurora County
Building permit	Not required	Required	Required	Required	Required	Limited	Limited
County zoning	No	Yes	Yes	Yes	Not published	Yes	Yes
Septic permits	DANR	DANR	DANR	DANR	DANR	DANR	DANR

Answers from the rulebook for Buffalo County

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

Buffalo County rules

County-wide zoningAbsent
Buffalo County's official department list includes no planning and zoning office, and no countywide zoning ordinance was found; zoning is a local-option power in South Dakota.
Buffalo County, South Dakota - County Offices ↗From the county’s own site, awaiting a second reviewer

South Dakota rules that apply here

Building permitLimited
Existing exterior repairs or substantially similar replacements involving a detached single-family owner-occupied residential structure in Buffalo County, including doors, downspouts, fascia, fencing panels or posts, gutters, nonstructural siding, soffits, and same-dimension windows.
- The exemption applies only to repair or substantially similar replacement of the listed existing exterior parts.
- For doors and windows, dimensions must remain the same.
- Siding must be nonstructural.
- The homeowner must still comply with every other applicable building code or ordinance.
- A county, municipality, or township may require permits for repairs or substantially similar replacements involving exterior parts of a designated historical property under chapter 1-19B.
“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: (1) Door, if the dimensions remain the same; (2) Downspout; (3) Fascia, (4) Fencing panel or post; (5) Gutter; (6) Siding, if nonstructural; (7) Soffit; and (8) Window, if the dimensions remain the same.”
SDLRC - Codified Law 11-10 - Building Codes and Standards ↗Re-checked Oct 1, 2026
One more reviewed finding on this topic
- Limited — Electrical wiring and fixture installations in an owner-occupied residence or farmstead under the South Dakota Electrical Commission.
  “You MUST have an approved homeowner permit BEFORE starting any electrical work. [...] a wiring permit is required when a $30 or more fee is generated (see below).”
  South Dakota Electrical Commission - Homeowner Wiring ↗Re-checked Sep 12, 2026
Owner-builder exemptionConditional
Owner-performed electrical wiring for a person's residence in South Dakota, including Buffalo County where state electrical rules apply.
- The applicant must not have applied for an Owner's Exemption permit 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.
- The applicant or the applicant's spouse must be the only persons performing the wiring.
- A wiring permit is required for electrical wiring performed under an owner's exemption.
- A permit used in violation of the rule receives a final subject or final void.
“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.”
ARSD 20:44:18:06 Criteria for permits for single-family dwelling units under an Owner's Exemption ↗Re-checked Oct 6, 2026
One more reviewed finding on this topic
- 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”
  South Dakota Electrical Commission - Homeowner Wiring ↗Re-checked Sep 12, 2026
Building code adoptedPartial
Buffalo County and every South Dakota local unit of government that has not adopted an ordinance prescribing building standards under SDCL 11-10-5; the state default concerns covered nonresidential construction and does not establish that Buffalo County itself adopted a local code.
- For construction commenced after July 1, 2026, the design standard must be based on the 2024 International Building Code when the local unit of government has not adopted an ordinance under § 11-10-5.
- Each local unit of government may adopt an ordinance allowing local administration and enforcement of the design standard.
- The default does not apply to a residential structure as defined in § 11-10-12, a mobile or manufactured home, a farmstead, or an accessory structure or building thereto.
- A farmstead means a farm or ranch, including any structure or building located on the land.
- The default does not apply to a nonresidential mobile or manufactured home constructed in compliance with applicable prevailing HUD standards if it complies with applicable accessibility standards for the intended occupancy.
- The default does not apply to a specialty resort or vacation home establishment constructed in compliance with Group R-3 of the 2024 International Building Code.
- If a local governing body adopts an ordinance prescribing covered standards, that ordinance must comply with the 2024 International Building Code; municipal amendments become effective upon adoption and filing with the municipal finance officer, and county amendments become effective upon adoption and filing with the county auditor.
- Under § 11-10-12, a municipality may adopt the 2024 International Residential Code for residential structures, but may not require residential sprinklers or impose requirements more stringent than that code.
default-code: 2024 International Building Code (Applies to covered construction in a local unit of government that has not adopted an ordinance under § 11-10-5.) · construction commencement threshold: > 2026-07-01 (The statute states construction commenced after July 1, 2026.)
“The design standard for construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal, and demolition of any building commenced after July 1, 2026, within the boundaries of any local unit of government that has not adopted an ordinance prescribing the standards pursuant to § 11-10-5, must be based on the 2024 edition of the International Building Code as published by the International Code Council, Incorporated. Each local unit of government may adopt an ordinance allowing local administration and enforcement of the design standard. The provisions of this section do not apply to any residential structure as defined in § 11-10-12, mobile or manufactured home, or farmstead and any accessory structure or building thereto.”
2026 Senate Bill 129 — update references in certain statutes to the 2024 standard building codes ↗Re-checked Oct 1, 2026
5 more reviewed findings on this topic
- Partial — Buildings commenced after July 1, 2026, within any South Dakota local unit of government that has not adopted an ordinance prescribing standards under South Dakota Codified Law § 11-10-5.
  “any building commenced after July 1, 2026 [...] must be based on the 2024 edition of the International Building Code”
  SDLRC - Codified Law 11-10-6 - New construction standards--No building code ordinance--International Building Code applied--Exclusions ↗Re-checked Sep 10, 2026
- Adopted (with conditions) — Construction within a South Dakota local unit of government that has not adopted a local ordinance under SDCL 11-10-5, subject to the statutory exclusions.
  “building commenced after July 1, 2026, within [...] any local unit of government that has not adopted an ordinance [...] must be based on the 2024 edition”
  SDLRC - Codified Law 11-10 - BUILDING CODES AND STANDARDS ↗Re-checked Oct 1, 2026
- Partial — Statewide South Dakota building standards for construction and related work within a local unit of government that has not adopted an ordinance prescribing standards under SDCL § 11-10-5.
  “The design standard [...] of any building commenced after July 1, 2026 [...] must be based on the 2024 edition of the International Building Code”
  Codified Law 11-10 - Building Codes and Standards ↗Re-checked Oct 1, 2026
- Partial — South Dakota building-code standards for construction within local units of government, including unincorporated county areas.
  “The design standard for construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal, and demolition of any building commenced after July 1, 2026, within the boundaries of any local unit of government that has not adopted an ordinance prescribing the standards pursuant to § 11-10-5, must be based on the 2024 edition of the International Building Code as published by the International Code Council, Incorporated. [...] The provisions of this section do not apply to any residential structure as defined in § 11-10-12, mobile or manufactured home, or farmstead and any accessory structure or building thereto.”
  Chapter 11-10: Building Codes and Standards ↗Re-checked Oct 1, 2026
- Partial — South Dakota building-code adoption framework for local governments, including residential structures and county or municipal construction standards.
  “The governing body of a municipality may enact requirements for construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal, and demolition of a residential structure by adopting the 2024 edition of the International Residential Code, as published by the International Code Council, Incorporated.”
  Codified Law Chapter 11-10 — Building Codes and Standards ↗Re-checked Oct 1, 2026
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.”
South Dakota Plumbing Commission - Inspections ↗Re-checked Sep 12, 2026
One more reviewed finding on this topic
- Limited — Electrical wiring installations subject to South Dakota Electrical Commission inspection.
  “A final inspection is required for all jobs prior to occupancy.”
  South Dakota Electrical Commission - Homeowner Wiring ↗Re-checked Sep 12, 2026
Minimum dwelling sizeDistrict specific (with conditions)
State statutory allocation of authority for county controls concerning the size of residential buildings and structures.
- A county board may adopt a zoning ordinance; SDCL 11-2-13 does not itself state a statewide minimum dwelling-size measurement.
- Any actual dimensional requirement depends on the county zoning ordinance adopted for the applicable area or district.
“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.”
SDCL 11-2-13, Adoption of zoning ordinance ↗Re-checked Nov 4, 2026
SetbacksDistrict specific (with conditions)
State statutory allocation of authority for county yard and open-space controls that may include setbacks.
- A county board may adopt a zoning ordinance; SDCL 11-2-13 does not itself state a statewide setback distance.
- Any actual setback depends on the county zoning ordinance adopted for the applicable area or district.
“The regulations may include maps for highways, roadways, parkways, roads, and streets showing the exact alignments, gradients, dimensions, and other pertinent features, and including specific controls for setbacks from the right-of-way against encroachment by buildings or other physical structures or facilities.”
SDCL 11-2-13, Adoption of zoning ordinance ↗Re-checked Nov 4, 2026
Lot coverageDistrict specific (with conditions)
State statutory allocation of authority for county lot-coverage controls.
- A county board may adopt a zoning ordinance; SDCL 11-2-13 does not itself state a statewide maximum lot-coverage percentage.
- Any actual lot-coverage limit depends on the county zoning ordinance adopted for the applicable area or district.
“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.”
SDCL 11-2-13, Adoption of zoning ordinance ↗Re-checked Nov 4, 2026
Manufactured homesLimited
Manufactured homes used as dwellings in South Dakota, regarding state construction preemption and the continued applicability of zoning.
- The construction preemption applies only if the manufactured home complies with the applicable standards.
- The State Fire Marshal may promulgate fire-safety rules under SDCL 13-25-1 and 13-25-2.
- SDCL 34-34A-16 expressly does not apply to zoning or taxation; local zoning may therefore govern siting or occupancy.
“The provisions of this section do not apply to zoning or taxation.”
SDCL 34-34A-16 — Additional construction requirements not applicable--Zoning and tax laws applicable ↗Re-checked Nov 4, 2026
Who permits septicState (with conditions)
On-site wastewater systems in Buffalo County under South Dakota's statewide regulatory program.
- The authority is found in SDCL Chapter 34A-2 and ARSD Article 74:53:01.
- The state standards are minimum requirements; local governments may adopt more stringent requirements.
- 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 installations receiving human excreta other than a conventional individual onsite system, under ARSD 74:53:01:03.
- For works of sanitary significance, plans and specifications must be submitted at least 30 days before planned construction under ARSD 74:53:04:05.
- Installers of individual and small wastewater systems must be certified by the South Dakota Plumbing Commission.
“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.”
South Dakota Feedlot Permit Program - Septic Tank Systems ↗Re-checked Oct 7, 2026
2 more reviewed findings on this topic
- State (with conditions) — On-site wastewater systems in Buffalo County and elsewhere in South Dakota.
  “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.”
  South Dakota Feedlot Permit Program - Septic Tank Systems ↗Re-checked Oct 7, 2026
- 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.”
  On-Site Wastewater Systems in South Dakota ↗Re-checked Sep 12, 2026
Septic permitLimited
On-site wastewater systems in Buffalo County, under South Dakota's statewide minimum requirements.
- South Dakota's rules are minimum requirements and standards; local governments may impose more stringent regulations.
- 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 to DANR for any installation receiving human excreta other than a conventional individual onsite system, under ARSD 74:53:01:03.
- For works of sanitary significance, plans and specifications must be submitted at least 30 days before planned construction.
- All persons intending to install individual and small wastewater systems must be certified by the South Dakota Plumbing Commission.
- Septic systems serving more than 20 people that qualify as Class V wells require DANR notification and approval; notification is not required for septic systems serving 20 or fewer people.
advance submission period for works of sanitary significance: >= 30 days (before the planned commencement of construction) · Class V septic system service population requiring DANR notification and approval: > 20 people (Notification is not required for septic systems serving 20 or fewer people)
“These regulations are the state’s minimum requirements and standards, but local governments may have more stringent regulations.”
South Dakota Feedlot Permit Program - Septic Tank Systems ↗Re-checked Oct 5, 2026
4 more reviewed findings on this topic
- Limited — On-site wastewater systems in Buffalo County, including conventional individual systems and other systems receiving human excreta.
  “A conventional individual on-site wastewater system may be designed and installed”
  One-Stop Permitting and Regulation Guide (2025 Edition) ↗Re-checked Oct 5, 2026
- Limited — Individual and small on-site wastewater systems in South Dakota, including systems located in Buffalo County.
  “These regulations are the state’s minimum requirements and standards, but local governments may have more stringent regulations. [...] 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. Plans and specifications must be submitted to DANR for any installation that will receive human excreta other than a conventional individual onsite system, per ARSD 74:53:01:03. For works of sanitary significance, plans and specifications must be submitted at least 30 days prior to the planned commencement of construction, per ARSD 74:53:04:05. All persons who intend to install individual and small wastewater systems must be certified by the South Dakota Plumbing Commission (605) 773-3429.”
  One-Stop Permitting and Regulation Guide (2025 Edition) ↗Re-checked Oct 7, 2026
- Limited — Installations receiving human excreta under South Dakota Administrative Rule 74:53:01:03.
  “submitted to the secretary for review and approval prior to construction.”
  South Dakota Administrative Rules, Article 74:53—Water Supply and Treatment Systems ↗Re-checked Nov 4, 2026
- Limited — New on-site wastewater (septic) systems in South Dakota; state DANR pre-installation contact/plan submission
  “you should contact danr prior to the installation of any new on-site system except those conventional on-site systems serving an individual residence.”
  One-Stop Permitting and Regulation Guide (2025 edition), SD DANR ↗Re-checked Nov 6, 2026
Septic inspectionLimited
Installation, equipment, and operation of on-site wastewater systems statewide.
- The secretary or the secretary's authorized representative may inspect at any time; the rule authorizes inspection but does not make every installation inspection mandatory.
“may be made at any time by the secretary or the secretary's authorized representative.”
South Dakota Administrative Rules, Article 74:53—Water Supply and Treatment Systems ↗Re-checked Nov 4, 2026
One more reviewed finding on this topic
- Limited — Installation, equipment, and operation of on-site wastewater systems in Buffalo County.
  “may be made at any time”
  Rule 74:53 Water Supply and Treatment Systems ↗Re-checked Sep 10, 2026
Off-grid sanitationLimited
Off-grid sanitation using unconventional systems where a water or electrical system is unavailable in Buffalo County.
- Vault privies, chemical toilets, incinerator toilets, or composting units shall be used when a water or electrical system is not available.
- Except for vault privies, all unconventional systems are considered experimental systems and plans and specifications must be submitted to the secretary for approval as an experimental system before installation.
- Unconventional systems must be sized, installed, operated, and maintained according to the manufacturer's specifications.
- Waste from unconventional system units must be disposed of in vault privies, holding tanks, or in accordance with section 74:53:01:41.
- Systems employing new technology are experimental and must provide for a backup system if the system does not function properly or creates a public-health hazard.
- Local governments may impose more stringent requirements.
“With the exception of vault privies, all unconventional systems are considered experimental systems”
ARSD Chapter 74:53:01 — Individual and Small On-Site Wastewater Systems ↗Re-checked Oct 5, 2026
2 more reviewed findings on this topic
- Prohibited — Construction or post-February 28, 1975 operation of cesspools and pit privies in Buffalo County.
  “Cesspools and pit privies prohibited.”
  Rule 74:53 Water Supply and Treatment Systems ↗Re-checked Sep 10, 2026
- Allowed (with conditions) — Unconventional off-grid sanitation systems where a water or electrical system is unavailable statewide.
  “all unconventional systems are considered experimental systems”
  Administrative Rule 74:53:01 — Individual and Small On-Site Wastewater Systems ↗Re-checked Sep 12, 2026
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.”
South Dakota Water Rights — Drilling a Well ↗Re-checked Sep 12, 2026
2 more reviewed findings on this topic
- Limited — Private well water use and well drilling in Buffalo County.
  “domestic use of water requires a permit if your water use exceeds either 25,920 gallons per day”
  Using Water in South Dakota ↗Re-checked Sep 10, 2026
- Limited — Drilling a water well in South Dakota; a state water right permit is needed only for certain water uses, not for every well
  “if a water right permit is needed, state law requires the permit to be approved prior to doing any well drilling.”
  South Dakota Water Rights - Drilling a Well (DANR) ↗Re-checked Nov 6, 2026
Mandatory utility hookupSewer (with conditions)
Buildings with plumbing fixtures, under SDCL 9-48-53's municipal sewer-connection rule.
- A public sewer system is available to a premises used for human occupancy when its property line is within 200 feet of the system.
- The statute does not apply to municipalities of the first class.
- The statute does not require a municipality to provide municipal service outside its boundaries.
public sewer system availability distance: <= 200 feet (Measured from the property line of a premise used for human occupancy to the system.)
“Each building in which plumbing fixtures are installed shall connect to a public water sewer system if available.”
South Dakota Codified Laws, Chapter 9-48—Sewer Systems ↗Re-checked Nov 4, 2026
2 more reviewed findings on this topic
- Sewer (with conditions) — Use of an on-site wastewater system versus connection to a public wastewater system in Buffalo County.
  “within 400 feet”
  Rule 74:53 Water Supply and Treatment Systems ↗Re-checked Sep 10, 2026
- Water (with conditions) — Buildings with plumbing fixtures, under SDCL 9-47-28's municipal water-connection rule.
  “Each building in which plumbing fixtures are installed shall connect to a public water supply system if available.”
  South Dakota Codified Laws, Chapter 9-47—Water Supply Systems ↗Re-checked Nov 4, 2026
Agricultural exemptionConditional
Farmsteads and their accessory structures or buildings in South Dakota, including applicable property in Buffalo County, when the statutory conditions for the default state building-design standard are met.
- The construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal, or demolition must be commenced after July 1, 2026.
- The property must be within the boundaries of a local unit of government that has not adopted an ordinance prescribing standards pursuant to SDCL § 11-10-5.
- The exclusion applies to a farmstead and any accessory structure or building thereto.
- A farmstead means a farm or ranch, including any structure or building located on the land.
- Each local unit of government may adopt an ordinance allowing local administration and enforcement of the design standard; local ordinances and other applicable requirements may therefore affect the project.
construction commencement date: > 2026-07-01 · default design standard: 2024 edition of the International Building Code (The default standard applies only where the local unit of government has not adopted an ordinance prescribing standards pursuant to § 11-10-5.)
“The provisions of this section do not apply to any residential structure as defined in § 11-10-12, mobile or manufactured home, or farmstead and any accessory structure or building thereto. For purposes of this section, "farmstead" means a farm or ranch, including any structure or building located on the land.”
SDLRC - Codified Law 11-10 - Building Codes and Standards ↗Re-checked Oct 5, 2026
One more reviewed finding on this topic
- Available (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.
  “farmstead and any accessory structure or building thereto.”
  South Dakota Codified Law Chapter 11-10: Building Codes and Standards ↗Re-checked Sep 12, 2026
Shed and accessory-building permit exemptionConditional
State default International Building Code design standard for buildings in local units of government that have not adopted their own building code ordinance; exclusion covers farmstead accessory structures and buildings
- Applies only to the statewide default IBC standard under SDCL 11-10-6, which governs buildings within a local unit of government that has not adopted an ordinance under SDCL 11-10-5.
- The default standard applies only to a building commenced after July 1, 2026 (construction commenced on July 1, 2026 is not covered).
- Exclusion covers any residential structure as defined in SDCL 11-10-12, mobile or manufactured home, or farmstead and any accessory structure or building thereto.
- 'Farmstead' means a farm or ranch, including any structure or building located on the land.
- Each local unit of government may adopt an ordinance allowing local administration and enforcement of the design standard; local ordinances under 11-10-5 are not displaced by this exclusion.
- No statewide accessory-structure size threshold was found.
default design standard: 2024 International Building Code (does not apply to residential structures, mobile/manufactured homes, or farmsteads and their accessory structures or buildings) · building commenced: > 2026-07-01 (applies only to buildings commenced after July 1, 2026)
“the provisions of this section do not apply to any residential structure as defined in § 11-10-12, mobile or manufactured home, or farmstead and any accessory structure or building thereto. for purposes of this section, "farmstead" means a farm or ranch, including any structure or building located on the land.”
SDCL 11-10-6 New construction standards--No building code ordinance--International Building Code applied--Exclusions ↗Re-checked Nov 6, 2026
One more reviewed finding on this topic
- Conditional — Farmstead accessory structures and accessory structures of one/two-family dwellings and townhouses, excluded from the default 2024 IBC design standard in local units without an adopted building code ordinance. This is NOT a floor-area building-permit exemption.
  “the provisions of this section do not apply to any residential structure as defined in § 11-10-12, mobile or manufactured home, or farmstead and any accessory structure or building thereto.”
  SDCL 11-10-6 New construction standards - IBC applied - exclusions ↗Re-checked Nov 6, 2026
Subdividing landRegulated (with conditions)
Division of a government subdivision or platted tract or lot, within or outside municipal corporate limits, into parcels for transfer when the parcels cannot be described except by metes and bounds.
- The parcels must be platted into lots, numbered, and the plat recorded before any instrument of transfer may be recorded.
- If an actual survey is necessary, the land must be surveyed and the plat recorded.
- The requirement does not apply to parcels subject to a contract with the United States Secretary of Agriculture under the Conservation Reserve Program that are being transferred to or from the South Dakota Building Authority.
“within or without the corporate limits of any municipality [...] he shall cause the parcels of land so divided to be platted into lots”
South Dakota Codified Law Chapter 43-21, Survey and Recording of Plats ↗Re-checked Oct 5, 2026
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.”
Instructions: Applying for permission for driveway or intersection on a South Dakota state highway ↗Re-checked Sep 12, 2026
One more reviewed finding on this topic
- Required — A driveway or intersection connecting to a South Dakota state highway, including such access in Buffalo County
  “Construction of the access shall not proceed until the access permit is issued.”
  Access Management ↗Re-checked Oct 5, 2026
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.”
National Flood Insurance Program ↗Re-checked Sep 12, 2026
Short-term rentalsLimited
Short-term lodging establishments in Buffalo County that fall within South Dakota Department of Health lodging licensure requirements, including vacation-home lodging
- South Dakota Department of Health licensing applies to lodging establishments for sanitation and safety purposes.
- Effective July 1, 2026, paper applications are no longer accepted; applications must be submitted through the online system.
- For lodging construction, submit a detailed floor plan to the Regional Advisor 30 days before construction starts; floor plans are required for hotels and specialty resorts but not vacation homes.
- Plans must be stamped by a professional engineer or architect for facilities larger than 4,000 square feet.
- Private sewer or water systems must be approved by the South Dakota Department of Agriculture and Natural Resources.
- Submit the online license or registration application with the correct fee 30 days before completion of construction.
- The cited state materials establish licensing and construction conditions, not a county zoning determination or a general authorization to operate irrespective of other applicable rules.
construction floor-plan submission lead time: 30 days before construction starts (Floor plans are required for hotels and specialty resorts, not for vacation homes.) · license or registration application lead time: 30 days before completion of construction · professional engineer or architect stamp threshold: > 4000 square feet
“Get a lodging establishment license for a bed and breakfast, specialty resort, hotel, or vacation home with these four steps.”
Food and Lodging Licensure and Codes ↗Re-checked Oct 5, 2026
Permit feesPublished (with conditions)
Construction activities in South Dakota, including residential, commercial, industrial, road, and access-road construction, that disturb one or more acres or are part of a larger common plan of development.
- Coverage under the General Permit is required when the applicable acreage threshold is met.
- The first year's stormwater fee must accompany the Notice of Intent.
- A 2.5% credit-card charge or 0.75% eCheck charge applies when using those payment methods.
construction stormwater fee for project area under 5 acres: 100 USD · construction stormwater fee for project area from 5 to under 40 acres: 250 USD · construction stormwater fee for project area from 40 to under 80 acres: 500 USD · construction stormwater fee for project area of 80 acres or more: 750 USD
“NOIs must also include the first year's stormwater fee, billed to the owner of the project, as follows: Construction Stormwater Fees <5 acres | $100 5 to < 40 acres | $250 40 to < 80 acres | $500 80+ acres | $750”
Stormwater Permit for Construction Activities ↗Re-checked Sep 10, 2026
One more reviewed finding on this topic
- Published (with conditions) — South Dakota state electrical wiring permits, including residential and farmstead wiring subject to state administration.
  “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.”
  South Dakota Electrical Wiring Rules Bulletin ↗Re-checked Sep 12, 2026
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.”
South Dakota Electrical Wiring Rules Bulletin ↗Re-checked Sep 12, 2026
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.”
2000 Session Laws Chapter 69 — Planning and zoning statutes revised ↗Re-checked Sep 21, 2026
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:”
New non-residential construction standards--Building code ordinance--Compliance with International Building Code--Modifications--Exclusions ↗Re-checked Oct 1, 2026

Set by your township or city, not the county

In South Dakota, zoning is adopted by each township or city, so Buffalo 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.

Zoning districts
Minimum lot size
Building height
Living in an RV
Camping on your land
Tiny homes
Accessory dwellings

Still unanswered

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

Certificate of occupancy — Certificate-of-occupancy or certificate-of-compliance requirements in Buffalo County, South Dakota.
Local zoning — Municipal, township, and other local zoning within Buffalo 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 Buffalo County, South Dakota

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

Buffalo County scores 43/100 on the Bolthole Index, a marginal county profile. Its strengths: deep seclusion — about 64 people within a 30-minute drive and manageable long-term carry cost. Watch-outs: thin water margin (22.1″/yr rainfall) and elevated current hazard exposure.

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

Land in Buffalo County runs about $1,941 per acre, based on the latest county data.

What is the water situation in Buffalo County?

Buffalo County gets about 22.1" of rain a year, with severe drought in roughly 10.6% of years.

How remote is Buffalo County?

A representative private-land location has about 64 people within a 30-minute drive and 100,717 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.

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