Bolthole Index

Butte County, Idaho

Building permits, zoning and land rules in Butte County, Idaho

40Index Score / 100
#37 of 44 in Idaho

Butte County, Idaho requires a county building permit, and Butte County Planning & Zoning publishes the application and fee-calculation information12. County zoning also applies, so the zoning district must be checked before designing or placing a home3. Southeastern Idaho Public Health handles septic permits and onsite evaluations45.

At a glance

Building permit
Required through Butte County Planning & Zoning1
Zoning
Yes; requirements depend on the parcel's mapped district36
Septic permits
Handled by Southeastern Idaho Public Health after an onsite evaluation47
RV living
Long-term occupancy on private land could not be confirmed; ask Planning & Zoning3
Tiny homes
No specific county occupancy rule was confirmed; zoning and building review still apply31
Owner-builder exemption
Could not be confirmed; ask Planning & Zoning before relying on one8
Wells
An Idaho Department of Water Resources drilling permit is required before drilling9
State-highway driveway
Requires an Idaho Transportation Department encroachment permit10

Who to call

Building permits

Butte County Planning & Zoning

Building permits and county zoning

Septic permits

Southeastern Idaho Public Health, Butte County Office

Septic permit applications, onsite evaluations and environmental health service for Butte County

(208) 234-5885

178 Sunset Drive, Arco, Idaho 83213

Contact details are copied from each office’s official page and were checked against it on September 27, 2026.

Do you need a building permit in Butte County, Idaho?

Yes. Butte County Planning & Zoning issues building permits and publishes both a Building Permit Application and an explanation of how permit fees are calculated12. Submitted plans must be complete or the county may return them11. The county's ordinance index records adoption of the International Building Code, although the currently operative local edition could not be confirmed from the available county material12. Idaho separately requires permits whenever electrical, plumbing or HVAC work is performed, and the administering jurisdiction can vary by location13. Butte County has not confirmed an owner-builder exemption, so someone intending to perform their own construction should ask Planning & Zoning what permits, plan credentials and contractor rules apply before ordering materials814.

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

Butte County Planning & Zoning is the county office for both building permits and zoning administration13. Its official page provides the Building Permit Application, fee-calculation resource, zoning ordinances and county zoning map1126. Use the office page to begin the application and confirm the current contact information before visiting14. Ask the office to identify the mapped zoning district, required land-use approvals, current building-code edition, plan submittal requirements and inspection sequence for the specific parcel. The available county material mentions building inspection but does not establish a complete inspection schedule, and it does not confirm whether a certificate of occupancy or equivalent completion document is required11.

Does Butte County have zoning?

Yes. Butte County administers county zoning and publishes a zoning map and zoning ordinances315. Published districts include Agricultural, Agricultural Transitional, Single Family Residential, Commercial and Industrial zones6. Parcel-specific requirements therefore depend on the mapped district, and the county has said changes to the zoning map are coming6. The available county material does not establish numeric minimum lot sizes, setbacks, lot coverage, building heights or minimum dwelling sizes. Before buying or designing, ask Butte County Planning & Zoning to confirm the parcel's current district and the dimensional standards that apply143. Incorporated places may have separate rules, so the county zoning answer should not be assumed to describe a parcel inside a city15.

How do septic permits work in Butte County?

Southeastern Idaho Public Health administers septic permits and onsite sewage evaluations for Butte County under Idaho's statewide onsite wastewater rules4516. A complete application needs a signed and dated form, a scaled plot plan, proof of ownership and the correct fee; every application requires an onsite evaluation, with the applicant generally providing test holes suited to the soil7. The district's Butte County office is at 178 Sunset Drive, Arco, Idaho 83213, phone (208) 234-588517. Only 21.8% of county soils are rated without severe limitations for a conventional septic drain field, so complete the site evaluation before treating a standard system as feasible18. Idaho also allows a permit denial where public or central wastewater treatment is reasonably accessible19.

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

We could not confirm a Butte County rule that allows or prohibits long-term RV occupancy, temporary camping on private land or tiny-home occupancy. Because Butte County has zoning and requires building permits, ask Planning & Zoning about the parcel's district, allowed residential uses, sanitation, setbacks and whether temporary occupancy is permitted while a house is under construction3114. Do not use Idaho's camping limits for wildlife management areas as an answer for private land; that rule governs designated public lands, not a privately owned Butte County parcel20. A tiny home built as a dwelling still needs to be evaluated under the county permit and zoning systems13. A new manufactured home in an area without an approved local building program needs a state installation permit and tag before installation, and every installation must be approved before occupancy2122.

What are the steps to build a home in Butte County?

  1. Ask Butte County Planning & Zoning to confirm the parcel's current zoning district and applicable development standards143.
  1. Arrange the Southeastern Idaho Public Health onsite evaluation before finalizing the house and drain-field layout7.
  1. Obtain an Idaho Department of Water Resources drilling permit before a well is drilled, and use a state-licensed well driller9.
  1. Secure an Idaho Transportation Department encroachment permit if the driveway meets a state highway; the county-road process could not be confirmed, so ask Planning & Zoning which road authority to contact1014.
  1. Submit complete plans and the building permit application to Butte County Planning & Zoning111.
  1. Obtain the separate electrical, plumbing and HVAC permits required for that work in Idaho13.
  1. Confirm required inspections with the county and the final septic inspection with the health district before occupancy2314.

What should you check before buying land in Butte County?

Start with buildability, not the listing description. Only 21.8% of Butte County soils are rated without severe limitations for a conventional septic drain field, so make the health-district evaluation a purchase contingency when possible1817. About 69.2% of the county is at a slope of 15% or less, but parcel terrain can differ sharply from the countywide figure24. Federal land makes up about 88.4% of the county, so verify legal access, boundaries and neighboring ownership carefully25. Annual precipitation is about 12.8 inches, and severe drought occurs in about 17.6% of years, making the well location and water plan central to due diligence2627. Idaho requires a permit before drilling a well9. The typical effective property-tax rate is about 0.5%, with a median annual bill near $986, but confirm the actual parcel assessment and exemptions2829.

Watch-outs

  • Butte County has said zoning-map changes are coming, so confirm the parcel's current district rather than relying on an older map6.
  • We could not confirm county rules for long-term RV living, private-land camping or tiny-home occupancy; ask Butte County Planning & Zoning before treating any of those uses as allowed314.
  • Only 21.8% of county soils are rated without severe limitations for a conventional septic drain field, so do not assume a standard system will work without an onsite evaluation187.
  • We could not confirm a Butte County owner-builder exemption; ask Planning & Zoning before assuming you can bypass contractor or plan requirements814.

Sources

  1. Butte County Planning & Zoning (2026 county census)
  2. Planning & Zoning – Butte County Idaho, quoted and re-checked
  3. Planning & Zoning – Butte County Idaho (2026 county census)
  4. Southeastern Idaho Public Health - Septic Permits (2026 county census)
  5. Septic Permits, quoted and re-checked
  6. Planning & Zoning – Butte County Idaho, quoted and re-checked
  7. Septic Permits, quoted and re-checked
  8. (2026 county census)
  9. Wells Overview (Idaho statewide rule), quoted and re-checked
  10. Types of Right-of-Way Encroachment Permits (Idaho statewide rule), quoted and re-checked
  11. Planning & Zoning – Butte County Idaho, quoted and re-checked
  12. Ordinances – Butte County Idaho, quoted and re-checked
  13. Frequently Asked Questions (FAQs) - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  14. Butte County Planning & Zoning (buttecountyid.us)
  15. Planning & Zoning – Butte County Idaho, quoted and re-checked
  16. Septic and Septage (Idaho statewide rule), quoted and re-checked
  17. Southeastern Idaho Public Health, Butte County Office (siphidaho.org)
  18. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  19. IDAPA 58.01.03 Individual/Subsurface Sewage Disposal Rules (Idaho statewide rule), quoted and re-checked
  20. Public Use of Department Lands and Access Areas (Idaho statewide rule), quoted and re-checked
  21. Building Archives - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  22. Building Archives - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  23. IDAPA 58.01.03 Individual/Subsurface Sewage Disposal Rules (Idaho statewide rule), quoted and re-checked
  24. Share of land at 15% slope or less: Bolthole Index county data
  25. Federal land share: Bolthole Index county data
  26. Annual precipitation: Bolthole Index county data
  27. Share of years in severe drought: Bolthole Index county data
  28. Effective property tax rate: Bolthole Index county data
  29. Median property tax bill: Bolthole Index county data

Written September 27, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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County locator

Butte County in Idaho

40
County map
Butte County highlighted among the Idaho counties · colored by Index score

How Butte County scores

Seclusion79100% ev.
Self-Sufficiency14100% ev.
Admin Boringness3890% ev.
Durability41100% ev.
Property Autonomy90100% ev.
Carry Cost85100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$196kTypical home
0.5%Property tax
$3,430Land / acre
12.8"Annual rain
17.6% of yrsSevere drought
1.9 / yr (+1.8)Mid-century 100°F days
29.4 daysMid-century dry spell
0.86" (+5.7%)Mid-century 1-day rain
1.16×Wildfire change factor
100%Forward climate coverage
$1,192Home insurance / yr
2.6% / yrInsurance growth
2.24%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
2,252Radius comparison (15 mi)
1.2People / sq mi
88.4%Federal land
69.2%Land at 15% slope or less
21.8%Septic soil without severe limits
279,105 acWorkable land screen
8.9%Wooded land
21.9 tonsBiomass / forest ac
41.8°FAvg temp

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Answers from the rulebook for Butte County

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

Butte County rules

  • Building code adoptedAdopted (with conditions)

    Building-code adoption listed in Butte County ordinances.

    • The ordinance index lists both the 2003 International Building Code adoption and the 2011 adoption of the 2009 edition; the current operative edition was not established from the opened pages.
    “2003-01 – Adoption of the Latest Version of The International Building Code 2011-02 – Adopting the 2009 edition of the International Building Code”
  • County-wide zoningPresent (with conditions)

    County zoning administered by Butte County Planning & Zoning.

    • The county publishes zoning ordinances and a county zoning map; parcel-specific requirements may depend on the mapped district.
    “Chapter 3 – Use Districts Chapter 5 – Zoning Map & Comprehensive Plan Chapter 6 – Agricultural Zone (A) Chapter 7 – Agricultural Transitional Zone (AT) Chapter 8 – Single Family Residential Zone (R-1)”
  • Zoning districtsPublished

    Butte County zoning districts and map resources.

    • The county states that changes to the zoning map are coming soon, so the published map may be subject to revision.
    “Chapter 3 – Use Districts Chapter 6 – Agricultural Zone (A) Chapter 7 – Agricultural Transitional Zone (AT) Chapter 8 – Single Family Residential Zone (R-1) Chapter 8-A – Single Family Residential Zone (R.5) Chapter 9 – Commercial Zone (C) Chapter 10 – Industrial Zone”
  • Who permits septicLocal (with conditions)

    Onsite sewage permitting and evaluation for Butte County through Southeastern Idaho Public Health.

    • The district page states that Idaho rules apply statewide and that applications require an onsite evaluation.
    • The page lists fees subject to change.
    “For additional information contact your local Environmental Health Specialist: [...] Butte and Power 208-221-3424 Mike Reas [email protected]”
  • Septic permitRequired

    Individual and subsurface sewage systems serving property in Butte County within Southeastern Idaho Public Health’s service area.

    • Applications require a completed, signed, and dated application; a scaled plot plan; proof of ownership; and the correct fee.
    • An onsite evaluation is required for all applications, with applicant-provided test holes generally 8–10 feet deep depending on soil type.
    • The 2026 application states that permits are valid for two years from issuance and may be renewed for two additional years with a $40 renewal fee paid before expiration.
    • The $925 permit and $300 speculative evaluation fees are subject to the stated 2026 application terms.

    septic permit fee: 925 USD (Permit valid for two years from issuance) · speculative onsite evaluation fee: 300 USD (Applied toward the $925 permit fee if the permit is issued within 12 months) · renewal fee: 40 USD (Renewal must be completed before expiration) · permit validity: 2 years (From date of issuance)

    “$925 - Septic Permit Permits are valid for two (2) years from the date of issuance, and may be renewed for two (2) additional years with a $40 renewal fee paid before expiration”
  • Permit feesPublished

    Butte County building-permit fee information.

    • The county page publishes a Building Permit Fee Determination resource explaining how fees are calculated; no specific fee amount was exposed in the opened page.
    “Building Permit Fees and how they are figured out.”
  • Permit processPartial

    Butte County building-permit process information.

    • The county Planning & Zoning page publishes links to a Building Permit Application and a Building Permit Fee Determination resource.
    • The opened page does not state the complete review, inspection, or issuance workflow.
    “All plans submitted to this office for review will be required to be complete. Submissions not meeting this requirement may be returned.”

Idaho rules that apply here

  • Building permitLimited

    New manufactured-home installations in Idaho locations without an approved local building program.

    • The installation permit and tag are required only for new homes.
    • The requirement applies in areas where there is not an approved local building program.
    • The permit must be obtained before starting installation.
    “An installation permit and installation tag (required only for new homes) is required by Idaho Division of Occupational and Professional Licenses prior to starting the installation in areas where there is not an approved local building program.”
    One more reviewed finding on this topic
  • InspectionsRequired

    All manufactured-home installations in Idaho before the manufactured home is occupied.

    • The inspection and approval are performed by DOPL or the authority having jurisdiction.
    • Inspection and approval must occur before occupancy.
    “All installations must be inspected and approved by the Idaho Division of Occupational and Professional Licenses or the authority having jurisdiction before the manufactured home is occupied.”
  • Camping on your landLimited

    Camping or parking a vehicle or trailer on Idaho Fish and Game Wildlife Management Areas and access sites separate from a WMA.

    • The restriction applies in areas posted against camping or parking.
    • Leaving an unattended camp, vehicle, or trailer for more than 48 hours is prohibited without authorization.
    • Camping or parking for more than 10 days during any 30-day period on one WMA or one separate access site is prohibited without authorization.
    • The rule permits authorization by the Commission, Director, Regional Supervisor, or designee.

    unattended duration: > 48 hours (Unless specifically authorized by the Commission, Director, Regional Supervisor, or designee.) · camping or parking duration: > 10 days during any 30-day period per WMA or separate access site (Unless specifically authorized by the Commission, Director, Regional Supervisor, or designee.)

    “camp or park a vehicle or trailer for more than ten (10) days during any thirty (30) day period”
  • Accessory dwellingsLimited

    Accessory dwelling units for Idaho DEQ wastewater-flow and septic-system sizing purposes; this claim does not establish statewide zoning permission.

    • An ADU is sized as a single-family dwelling for the cited wastewater-flow guidance.
    • An ADU may combine flows with another structure into one system.
    • Any common septic tank must be large enough to hold the required capacity from both structures.
    • Local land-use, building, and septic authorities may impose additional requirements.

    wastewater flow basis: single-family dwelling

    “Size as a single family dwelling. Can combine with another structure's flows into one system”
  • Septic inspectionRequired

    Individual and subsurface sewage disposal systems constructed or installed under Idaho’s onsite wastewater rules.

    • The Director requires one or more inspections necessary to determine compliance.
    • The permittee must uncover or make available for inspection any portion covered or concealed in violation of the rules.
    • If preparation is required, the applicant or permittee must provide at least 48 hours’ advance notice, excluding weekends and holidays.
    • For individual systems, the public health district inspects the installation.
    • Large soil absorption systems are inspected by the public health district and DEQ.

    advance inspection notice: >= 48 hours (Excludes weekends and holidays.)

    “No system may receive wastewater until the Director conducts a final installation inspection”
  • Well permitRequired

    Construction or drilling of wells in Idaho, including domestic wells.

    • Before drilling, the well owner or driller must obtain a drilling permit from IDWR.
    • All wells must be constructed by a well driller with a valid IDWR license.
    • The separate water-right permit exemption for domestic purposes does not eliminate the drilling-permit requirement.
    • For new diversions in qualifying subdivisions filed on or after July 1, 2025, a water-right permit is required in a moratorium area, critical groundwater area, or groundwater management area, except for in-home uses and watering livestock.
    • Well construction rules apply to wells and other artificial openings more than 18 vertical feet below land surface.

    well depth threshold: > 18 vertical feet below land surface (The cited well-construction rules describe covered wells and artificial openings.) · subdivision application date: >= 2025-07-01 (Applies to qualifying new diversions described in Idaho Code § 42-227(4).)

    “Prior to drilling a well, the well owner or well driller must first obtain a drilling permit from IDWR.”
  • Mandatory utility hookupConditional

    Proposed individual or subsurface sewage disposal systems where public or central wastewater treatment facilities may be available.

    • The Director may deny a septic permit when public or central wastewater treatment facilities are reasonably accessible.
    • The cited rule does not establish a universal statewide requirement to connect every property to public sewer.
    • Subsurface septic discharge remains an identified onsite disposal method.
    “Public or central wastewater treatment facilities are reasonably accessible.”
  • Driveway accessRequired

    Private and public driveways or streets connecting to Idaho state highway right-of-way.

    • An ITD encroachment permit is required for private and public approaches, including driveways and streets.
    • No activity may occur on state highway rights-of-way until the Department or a delegated local highway agency issues an approved permit, except emergency approval affecting highway operations and motorist safety may precede processing.
    • A Traffic Impact Study may be required for new or expanded development seeking direct access to a state highway when the stated thresholds are met, unless waived by the District Engineer.

    peak-hour trips for possible TIS requirement: >= 100 new trips (unless waived by the District Engineer) · daily traffic for possible TIS requirement: >= 1000 vehicles per day (unless waived by the District Engineer)

    “Encroachment permits approved by the Department are required for private and public approaches (driveways and streets), utilities and other miscellaneous encroachments.”

Still unanswered

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

  • Owner-builder exemption — Owner-builder exemptions from building-permit or contractor requirements in Butte County.
  • Certificate of occupancy — Certificates of occupancy or equivalent completion documents for buildings in Butte County.
  • Local zoning — Aggregate local zoning across Butte County, including county and incorporated local jurisdictions.
  • Minimum dwelling size — Minimum dwelling size requirements in Butte County zoning districts.
  • Minimum lot size — Minimum lot size requirements in Butte County zoning districts or subdivision regulations.
10 more unanswered
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Tiny homes
  • Manufactured homes
  • Off-grid sanitation
  • Agricultural exemption
  • Building in a floodplain
  • Short-term rentals

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

Water rights & wells in Butte County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from Idaho’s water agency.

Over-appropriated / declining

The aquifer here is over-appropriated and declining. A domestic well is usually still permit-exempt, but long-term supply is a genuine risk.

Household wellExempt — no permit or water right

Groundwater for domestic purposes up to 13,000 gpd is exempt from permitting; critical-area and moratorium closures generally target new PERMITTED (non-exempt) appropriations, so a household can still drill a domestic-exempt well even inside a critical groundwater area.

Limit: 13,000 gpd (homes, stockwater, irrigation of ≤0.5 acre) under Idaho Code 42-227

Idaho Dept of Water Resources — Domestic Exemption ↗
  • Eastern Snake Plain Aquifer (ESPA) Ground Water Management Areamajority of county

    Designated a GWMA (2016); the Snake River Basin Moratorium (2022, amended 2024) bars new/pending permit applications above Swan Falls Dam, effectively closing new appropriative groundwater rights — domestic-exempt wells excepted.

    Idaho Dept of Water Resources — ESPA GWMA Order ↗

Prior-appropriation state (first in time, first in right). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the Idaho state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Butte County, Idaho

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

Butte County scores 40/100 on the Bolthole Index, a marginal county profile. Its strengths: a stronger property-autonomy legal backdrop and manageable long-term carry cost. Watch-outs: weak self-sufficiency basics: only 12.8″ of rain a year and more administrative friction around building and land use.

Do you need a building permit in Butte County, Idaho?

Butte County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Southeastern Idaho Public Health (SIPH). 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 Butte County, Idaho?

Land in Butte County runs about $3,430 per acre, based on the latest county data.

What is the water situation in Butte County?

Butte County gets about 12.8" of rain a year, with severe drought in roughly 17.6% of years. On water rights, Butte County lies in the Eastern Snake Plain Aquifer (ESPA) Ground Water Management Area — Designated a GWMA (2016); the Snake River Basin Moratorium (2022, amended 2024) bars new/pending permit applications above Swan Falls Dam, effectively closing new appropriative groundwater rights — domestic-exempt wells excepted..

How remote is Butte County?

A typical private-land location has about 2,252 people within 15 miles and 455,036 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

Off-grid gear

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

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How Butte compares in Idaho

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