Building permits, zoning and land rules in Day County, South Dakota
46Index Score / 100 #44 of 66 in South Dakota
Unincorporated Day County, South Dakota requires a building/use permit before covered construction, structural alterations, use changes and related site work begin.1 Day County applies its zoning in unincorporated areas; the City of Webster has its own zoning documents, and other towns follow the county ordinance only if they have adopted it.23 Septic is governed by South Dakota's on-site wastewater standards at every address, and local governments may be stricter.4
At a glance
Building permit
Required before covered work begins in unincorporated areas1
Zoning
Yes in unincorporated Day County; municipal administration varies25
Septic
State standards apply; DANR review depends on system type46
RV living
Long-term occupancy rule not confirmed; ask Planning & Zoning7
Tiny home
Specific occupancy rule not confirmed; permit and district rules apply12
Manufactured home
Allowed in the Agricultural District, subject to other requirements8
Owner electrical work
Limited exemption; homeowner permit and inspections still apply9
Driveway access
Approval required for approaches on public roads or highways10
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Do you need a building permit in Day County, South Dakota?
Yes. Unincorporated Day County requires a building/use permit before a building or structure is erected, moved, added to, structurally altered or used.1 The requirement also reaches covered excavation, grading, filling, lagooning and dredging connected with future construction.1 Applications go to the Zoning Officer and may require a site plan plus information about existing or proposed water, sewer and electrical facilities.11
A conditional use, variance or other approval may also be necessary when the proposal does not qualify for straightforward approval under the ordinance.1 Day County publishes that its fee schedule is set by County Commission resolution, posted in the County Zoning Officer's office and payable before a decision, so ask Planning & Zoning for the current building/use permit charge for the exact application.127 A conditional use permit application carries a $250 base filing fee payable to the Day County Treasurer.13
Who issues building/use permits and zoning approval in Day County?
The Day County Planning & Zoning Office is the first stop for building/use permits and zoning applications on unincorporated land.11 The office is at 711 W 1st Street, Suite 203, Webster, SD 57274, can be reached at (605) 345-9502 and is available by appointment.7 Bring the parcel's legal description, proposed use and a preliminary site plan so the office can identify the needed approvals.1
Conditional uses and variances go through the Board of Adjustment.11 If a conditional-use application is required, the published process calls for a legal description, signatures and site plan; adjoining landowners receive mailed notice and public notice is published before the hearing.14 Land inside the City of Webster is covered by the city's own zoning documents, so contact Webster rather than assuming the unincorporated process applies.3 For other towns, the county's mitigation plan says they are covered under the county zoning ordinance, but the ordinance itself applies in incorporated areas only after the town board or city council adopts it, so confirm with the town.32 Septic and wastewater standards do not move to a town either way; they come from the state.4
Does Day County have zoning?
Yes. Day County zoning applies in unincorporated areas, and the City of Webster has its own zoning documents.23 Other incorporated places are covered by the county ordinance only where the town board or city council has adopted it.2 The county ordinance identifies Agricultural Fringe Protection, Agricultural, Residential, Lake Front Residential, Commercial, Highway Commercial and General Industrial districts.15 Use the official zoning map to confirm the parcel's classification before designing the project.16
The district changes the buildable envelope. Agricultural District provisions include a 75-foot road-right-of-way setback and 200 feet of frontage, while Commercial District provisions list 10-foot front and rear setbacks.1718 Commercial lots have a 2,400-square-foot minimum area, 25-foot minimum width and maximum building coverage of 90% of the lot.1920 Building-height limits also depend on structure type and district; residential-district telecommunications support structures have a 150-foot limit unless the Board grants a waiver.21
Who regulates septic systems in Day County, and how do they work?
South Dakota DANR sets the on-site wastewater standards that apply in Day County, and local governments may impose stricter requirements.4 DANR should be contacted before a new on-site system is installed except for a conventional system serving an individual residence; other systems receiving human waste require plans and specifications for review.6 The state program can answer design and review questions at (605) 773-4647.22
Plan the site evaluation early: only about 0.7% of mapped Day County soils avoid a “very limited” rating for conventional septic drain fields.23 That countywide soil measure does not determine whether one parcel will pass, but it supports budgeting for careful siting and possibly a more involved design.23 South Dakota requires certified installers for every new septic system, while a universal inspection rule for every Day County system could not be confirmed.24
Can you live in an RV or tiny home on land in Day County?
We could not confirm a Day County rule specifically allowing or prohibiting long-term RV occupancy, temporary camping or tiny-home occupancy on private land. Ask Planning & Zoning how the unit and proposed occupancy will be classified before moving it onto an unincorporated parcel.7 A building/use permit is required for covered structures and uses, and the parcel's zoning district still controls placement and allowed uses.12
Day County expressly allows dwellings including mobile homes in the Agricultural District, subject to other requirements, but that does not automatically classify a tiny home or RV as a mobile home.8 Off-grid sanitation is a separate issue: South Dakota permits certain unconventional systems where water or electricity is unavailable, subject to state conditions.25 Ask the county about occupancy and DANR about wastewater rather than treating one approval as covering both.722
What are the steps to build a home in Day County?
Ask Day County Planning & Zoning to confirm whether the parcel is under county or municipal administration and identify its zoning district.516
Prepare the site plan and utility information, then apply for the building/use permit before covered work begins.111
Confirm setbacks, lot coverage and whether a conditional use or variance is required.262711
Evaluate the wastewater site and ask DANR whether plans must be submitted.622
Obtain approval for a public-road approach through the Planning Commission and the highway superintendent or township board; state-highway access must meet state rules.10
Obtain applicable state electrical and plumbing permissions and arrange required inspections.2829
What should you check before buying land in Day County?
Confirm the official zoning map, permitted use, lot dimensions, setbacks, building coverage and access before relying on a listing description.16302627 Public-road approaches require county-level approval, and a connection to a state highway must also comply with state regulations.10 The Day County Highway Department can discuss county highways, culverts and ditches at (605) 345-4658.31
Investigate soils before assuming a conventional drain field will work, because about 0.7% of mapped soils avoid severe limitations for that use.23 Confirm a proposed well's state water-right status before drilling.32 Also identify the local floodplain administrator: development in mapped floodplains of participating South Dakota communities requires a local permit, but we could not confirm Day County's general process.33
Watch-outs
Do not begin covered construction or site work before Day County issues the required building/use permit in unincorporated areas; inside Webster, ask the city.13
Long-term RV living, temporary camping, tiny-home occupancy and a general minimum dwelling size remain unconfirmed; ask Planning & Zoning about the parcel and proposed unit.7
A county building/use permit does not replace state electrical, plumbing, septic or state-highway access requirements.2829434
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.
Day County highlighted among the South Dakota counties · colored by Index score
How Day County scores
Seclusion83100% ev.
Self-Sufficiency1694% ev.
Admin Boringness5968% ev.
Durability45100% ev.
Property Autonomy67100% ev.
Carry Cost81100% ev.
Evidence strength: 93%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →
$269kTypical home
1%Property tax
$3,549Land / acre
23.7"Annual rain
2% of yrsSevere drought
5.4 / yr (+4.7)Mid-century 100°F days
20.1 daysMid-century dry spell
1.43" (+8.3%)Mid-century 1-day rain
1.63×Wildfire change factor
100%Forward climate coverage
$1,637Home insurance / yr
4.7% / yrInsurance growth
0.34%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
1,019People within 30 min
198,861People within 2 hr
4,341Radius comparison (15 mi)
5.3People / sq mi
28.7%Federal land
97.3%Land at 15% slope or less
0.7%Soils rated "not limited" for septic (strict USDA rating)
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Cities and towns in Day 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.
Town of Andover · Andover Township · Bristol · Bristol Township · Town of Butler · Butler Township · Central Point Township · Egeland Township · Farmington Township · Town of Grenville · Grenville Township · Highland Township · Homer Township · Independence Township · Kidder Township · Kosciusko Township · Liberty Township · Lynn Township · Morton Township · Nutley Township · Oak Gulch Township · Town of Pierpont · Racine Township · Raritan Township · Town of Roslyn · Rusk Township · Scotland Township · Troy Township · Union Township · Valley Township · Waubay · Waubay Township · Webster · Webster Township · Wheatland Township · York Township
Answers from the rulebook for Day County
What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.
Day County rules
Building permitRequired
Buildings, structures, excavation, construction, alteration, use changes, filling, grading, lagooning, or dredging related to future construction in unincorporated Day County.
A building/use permit is required before the covered work begins.
Applications require a site plan and information about existing or proposed water, sewer, and electrical facilities.
Conditional-use, variance, or other approval may be required where applicable.
“No building or other structure shall be erected, moved, added to, structurally altered or used without a permit issued by the Zoning Officer. The Zoning Officer except in conformity with the provisions of this ordinance shall issue no permit, unless he received a written order from the Board of Adjustment in the form of an administrative review, under conditional use, or variance as provided by this ordinance.”
County-wide zoningPresent (with conditions)
Zoning regulation in unincorporated Day County.
The ordinance applies within unincorporated areas.
Incorporated areas are covered only upon adoption by the applicable Town Board or City Council, with enforcement left to the town or city.
“The provisions of this Ordinance shall apply within the unincorporated areas of Day County.”
One more reviewed finding on this topic
Present — Zoning in unincorporated Day County.
“The provisions of this Ordinance shall apply within the unincorporated areas of Day County. This Ordinance will only apply in incorporated areas upon adoption of the plan and ordinances by Resolution of the Town Board or City Council. The enforcement of said plan and resolutions will be left to the Town or City.”
Local zoningVaries (with conditions)
Aggregate of local zoning in Day County: county zoning applies to unincorporated areas and most municipalities, while the City of Webster has its own zoning documents.
This aggregate does not mean the county administers every incorporated municipality.
The official county mitigation plan states that all municipalities except Webster are covered under county zoning and that county enforcement manages county zoning.
“all of the municipalities except for Webster are covered under the County Zoning Ordinances and Comprehensive Plan”
2 more reviewed findings on this topic
Varies (with conditions) — Aggregate local zoning across Day County: county zoning applies in unincorporated areas, while incorporated municipalities require their own adoption and enforcement.
“This Ordinance will only apply in incorporated areas upon adoption of the plan and ordinances by Resolution of the Town Board or City Council. The enforcement of said plan and resolutions will be left to the Town or City.”
Varies (with conditions) — County aggregate of county zoning and any incorporated-municipality zoning within Day County.
“The enforcement of said plan and resolutions will be left to the Town or City.”
Zoning districtsPublished (with conditions)
Zoning districts in unincorporated Day County.
The Official Zoning Map is the final authority for current zoning status.
The ordinance establishes seven district types: Agricultural Fringe Protection, Agricultural, Residential, Lake Front Residential, Commercial, Highway Commercial, and General Industrial.
“For the purposes of this Ordinance, there are hereby created seven (7) types of districts by which the jurisdictional area defined in ARTICLE 2 shall be divided:”
One more reviewed finding on this topic
Published — The Day County zoning jurisdiction.
“For the purposes of this Ordinance, there are hereby created seven (7) types of districts by which the jurisdictional area defined in ARTICLE 2 shall be divided: Agricultural Fringe Protection District (AGFP) Agricultural District (AG) Residential District (R-1) Lake Front Residential District (R-2) Commercial District (C) Highway Commercial District (HC) General Industrial District (I)”
Minimum lot sizeDistrict specific (with conditions)
Minimum lot requirements in Day County zoning districts.
Requirements vary by zoning district.
minimum lot area: >= 7000 square feet (single- and multi-family dwellings in the cited district) · minimum lot area: >= 2400 square feet (cited district) · minimum lot area: >= 30000 square feet (permitted uses in the cited district)
“The minimum lot area shall be seven thousand (7,000) square feet for single and multi-family dwellings. [...] The minimum lot area shall be two thousand four hundred (2,400) square feet. [...] The minimum lot area for permitted uses shall be thirty thousand (30,000) square feet.”
One more reviewed finding on this topic
Specified — Commercial District lots in unincorporated Day County.
“two thousand four hundred (2,400) square feet”
SetbacksSpecified
Agricultural District setbacks in unincorporated Day County.
Shelterbelts have separate setback rules; existing farmstead shelterbelts are exempt from the minimum shelterbelt setback.
State and federal regulations apply to shelterbelts along state and federal highways.
“There shall be a minimum setback from the property line of not less than seventy-five (75) feet from public road right-of-ways. There shall be a frontage of not less than two hundred (200) feet across the front yard.”
2 more reviewed findings on this topic
District specific (with conditions) — Yard and setback requirements in Day County zoning districts.
“There shall be a minimum setback from the property line of not less than seventy-five (75) feet from public road right-of-ways. [...] There shall be a minimum set back from the property line of not less than one hundred fifty (150) feet set back from the center of the public road.”
Specified — Commercial District setbacks in unincorporated Day County.
“All permitted structures located on the lot shall have a front yard setback of a least ten (10) feet and a minimum rear yard setback of ten (10) feet. Minimum side yard setbacks to be determined by location and circumstances defined in permit, and agreements(s) of adjoining landowners.”
Lot coverageSpecified
Buildings in the district governed by the cited maximum-coverage provision.
The limit is district-specific.
maximum lot coverage: <= 90 percent (all buildings in the cited district)
“The maximum lot coverage for all buildings shall not be more than ninety percent (90%) of the total lot area.”
2 more reviewed findings on this topic
District specific (with conditions) — Lot-coverage controls in Day County zoning districts.
“The maximum lot coverage for all buildings shall not be more than ninety percent (90%) of the total lot area.”
Specified — Commercial District buildings in unincorporated Day County.
“The maximum lot coverage for all buildings shall not be more than ninety percent (90%) of the total lot area.”
Building heightDistrict specific (with conditions)
Height controls under the Day County zoning ordinance.
Height requirements depend on the applicable district and structure type.
The ordinance also contains separate telecommunications height standards.
telecommunications support structure height in non-residential districts: <= 199 feet (subject to the ordinance's telecommunications provisions) · telecommunications support structure height in residential districts: <= 150 feet (subject to Board waiver upon satisfactory showing of need)
“In non-residential districts, Support Structures shall not exceed a height of one hundred ninety-nine (199) feet from the base of the structure to the top of the highest point. [...] In residential districts, Support Structures shall not exceed a height equal to one hundred fifty (150) feet from the base of the structure to the top of the highest point.”
One more reviewed finding on this topic
Specified — Telecommunications support structures in Day County zoning districts.
“In residential districts, Support Structures shall not exceed a height equal to one hundred fifty (150) feet from the base of the structure to the top of the highest point.”
Manufactured homesLimited
Manufactured or mobile homes in the Agricultural District.
The ordinance expressly lists mobile homes as permitted in the Agricultural District; other districts and placement requirements may differ.
A building/use permit is required.
“Dwellings and their normal accessory buildings including mobile homes;”
One more reviewed finding on this topic
Allowed (with conditions) — Manufactured or mobile homes used as dwellings in the Agricultural Fringe Protection and Agricultural Districts.
“Dwellings and their normal accessory buildings including mobile homes, subject to compliance with other ordinances or restrictions;”
Subdividing landRegulated (with conditions)
Every addition to or subdivision within Day County, South Dakota, and the prescribed area of extraterritorial jurisdiction.
The regulations apply to every addition to or subdivision within Day County and the prescribed area of extraterritorial jurisdiction.
No subdivision plat may be filed or recorded until submitted to the Planning and Zoning Commission for review and approved by the Day County Commissioners.
“The provisions of these regulations shall apply to every addition to, or subdivision within Day County, South Dakota, and their prescribed area of extra-territorial jurisdiction.”
Driveway accessRequired
Approach access on public roads or highways in unincorporated Day County.
Planning Commission approval is required.
Approval may require highway superintendent or township board approval.
Approach access on a state highway must comply with state regulations.
“All approaches on public roads or highways are subject to approval permitted by the Planning Commission, subject to approval permitted by the Planning Commission with approval of the highway superintendent or township board. Approach access on a state highway will need to comply with state regulations.”
One more reviewed finding on this topic
Required — Approaches on public roads or highways in unincorporated Day County.
“All approaches on public roads or highways are subject to approval permitted by the Planning Commission, subject to approval permitted by the Planning Commission with approval of the highway superintendent or township board. Approach access on a state highway will need to comply with state regulations.”
Building in a floodplainLimited
Concentrated animal feeding operations and related facilities in Day County floodplain Zones A and B.
In Floodplain Zoned A, new CAFOs, expansion beyond 300 animal units, earthen storage basins and lagoons, and stockpiling solid waste are prohibited.
In Floodplain Zoned B, new or expanded Class A and B CAFOs and earthen storage basins and lagoons are prohibited.
New Class D and expansion of existing Class D up to 999 animal units are allowed in Zoned B by conditional use.
The county may require soil borings; applications are reviewed site-specifically.
maximum existing CAFO expansion in Zoned A: <= 300 animal units · maximum Class D expansion in Zoned B by conditional use: <= 999 animal units
“The following uses are prohibited in a floodplain Zoned A: 1. New Concentrated Animal Feeding Operations after adoption of this ordinance. 2. Existing Concentrated Animal Feeding Operations will not be able to expand beyond a total of 300 animal units. 3. Earthen storage basins and lagoons. 4. Stockpiling of solid waste.”
Permit feesPublished (with conditions)
Building permits, certificates of zoning compliance, appeals, and other matters under the county zoning ordinance.
The Board of County Commissioners establishes the schedule by resolution.
The schedule is posted in the County Zoning Officer's office and may be altered or amended only by the Board.
All applicable fees must be paid before a decision is made.
“The Board of County Commissioners shall, by resolution, establish a schedule of fees, charges, and expenses and a collection procedure for building permits, certificates of zoning compliance, appeals, and other matters pertaining to this Ordinance, The schedule of fees shall be posted in the office of the County Zoning Officer and may be altered or amended only by the Board of County Commissioners.”
One more reviewed finding on this topic
Published (with conditions) — Day County conditional-use permit applications.
“The application, along with a $250.00 base cost plus addl $250.00 per million filing fee, made out to “Day County Treasurer” must be completed and returned to the Day County Planning and Zoning Director”
Permit processPublished (with conditions)
Conditional-use permit process administered by the Day County Planning and Zoning Commission.
Submit the application, legal description, signatures, and site plan.
Adjoining landowners receive mailed notice and public notice is published in designated county newspapers.
Applicant should attend the hearing.
A granted conditional use not used within two years is invalid.
“All adjoining landowners will be notified by mail and public notice will be published in the designated newspapers of Day County, South Dakota with the date and time of hearing of the conditional use request.”
One more reviewed finding on this topic
Published (with conditions) — Day County building/use permits and related zoning applications.
“Application for building and use permits shall be made to the Zoning Officer upon forms approved by the Board of County Commissioners. These forms shall be filled in by the owner, or authorized agent. All applications for permits shall be accompanied by a site plan”
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”
Building code adoptedPartial
South Dakota building-code adoption framework for local governments, including residential structures and county or municipal construction standards.
For residential structures, the statute authorizes the governing body of a municipality to adopt the 2024 International Residential Code; the quoted residential authorization does not name counties.
A residential-structure rule may not require installation of a sprinkler system and may not impose requirements more stringent than the 2024 International Residential Code.
A residential structure means a detached one-family or two-family dwelling, a townhouse not more than three stories with a separate means of egress, and related accessory structures.
For buildings other than residential structures, a local-unit ordinance must comply with the 2024 International Building Code, subject to statutory exclusions and permitted amendments.
The nonresidential rule does not apply to HUD-compliant mobile or manufactured homes, may not require fire sprinklers in a single-family dwelling, and does not apply to qualifying specialty resorts or vacation-home establishments constructed to Group R-3 requirements.
Where a local unit has not adopted a qualifying ordinance, the default 2024 International Building Code design standard applies to covered construction commenced after July 1, 2026, but the default does not apply to residential structures, mobile or manufactured homes, farmsteads, or accessory structures.
residential model code: 2024 International Residential Code (Municipal governing body authorization; no sprinkler requirement; no requirements more stringent than the code) · nonresidential model code: 2024 International Building Code (Statutory exclusions apply) · default nonresidential design-standard commencement: > 2026-07-01 (The default does not apply to residential structures, mobile or manufactured homes, farmsteads, or accessory structures)
“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.”
2 more reviewed findings on this topic
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”
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.”
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.
“You must have a plumbing inspection certificate for all plumbing installations.”
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.”
Who permits septicState
Individual and small on-site wastewater systems statewide in South Dakota.
The South Dakota Department of Agriculture and Natural Resources secretary or authorized representative administers the state on-site wastewater requirements.
The state rules are minimum requirements; local governments may impose more stringent requirements, according to the DANR permitting guide.
“The authority for regulating on-site wastewater systems is found in SDCL Chapter 34A-2.”
One more reviewed finding on this topic
State — On-site wastewater systems in Day County, subject to any more stringent local requirements.
“These regulations are the state’s minimum requirements and standards, but local governments may have more stringent regulations.”
Septic permitLimited
New or modified on-site wastewater systems in Day County.
DANR should be contacted before installation of any new 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.
Local requirements may be more stringent.
“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.”
One more reviewed finding on this topic
Limited — New or modified on-site wastewater systems in Day County other than conventional systems serving an individual residence.
“except those conventional on-site systems serving an individual residence.”
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.”
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.”
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 Day 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.
Minimum dwelling size
Living in an RV
Camping on your land
Tiny homes
Accessory dwellings
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 for buildings in unincorporated Day County.
Septic inspection — Inspection of on-site wastewater systems in Day County.
Mandatory utility hookup — Water and sewer connection requirements for development in unincorporated Day 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 Day County, South Dakota
Is Day County a good place to live off-grid or homestead?
Day County scores 46/100 on the Bolthole Index, a marginal county profile. Its strengths: deep seclusion — about 1,019 people within a 30-minute drive and manageable long-term carry cost. Watch-outs: thin water margin (23.7″/yr rainfall).
Do you need a building permit in Day County, South Dakota?
Day County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by South Dakota DANR - On-Site Wastewater Program. 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 Day County, South Dakota?
Land in Day County runs about $3,549 per acre, based on the latest county data.
What is the water situation in Day County?
Day County gets about 23.7" of rain a year, with severe drought in roughly 2% of years.
How remote is Day County?
A representative private-land location has about 1,019 people within a 30-minute drive and 198,861 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.
