Bolthole Index

Power County, Idaho

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

58Index Score / 100
#26 of 44 in Idaho

Unincorporated Power County, Idaho requires building permits before site preparation and construction, with limited exemptions12. Power County zoning districts govern land use, while incorporated cities have separate authority34. Septic permits and site evaluations come from Southeastern Idaho Public Health5.

At a glance

Building permit
Required before site preparation, construction, alteration and other covered work in unincorporated Power County1
Zoning
Yes; county zoning districts, overlay districts and setbacks apply367
Septic permits
Southeastern Idaho Public Health handles applications and site evaluations89
Agricultural buildings
A limited exemption applies on qualifying agricultural land, but a development permit and inspections still apply1011
RV or tiny-home living
An RV cannot be used as a single-family dwelling except for up to one year after a home is destroyed; tiny-home rules remain unconfirmed12
Owner-builder exemption
Owners may do their own work without contractor registration if they do not intend to sell within 12 months; permits and inspections still depend on the work1314
Private wells
An Idaho Department of Water Resources drilling permit is required before drilling15

Who to call

Building permits

Power County Building Administrator / Planning and Zoning

Building permits, inspections, zoning, subdivision and land-use questions in Power County

208-226-7625

73 Fort Hall Ave. Ste. A American Falls, ID 83211

Septic permits

Southeastern Idaho Public Health, Power County Office

Septic applications, site evaluations and onsite-system permitting for Power County

(208) 226-5096

590 1/2 Gifford, American Falls, ID 83211

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Off-grid gear

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

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

Unincorporated Power County requires building permits before site preparation, construction, alteration and other covered work; the county also lists re-roofing, re-siding, manufactured-home placement and outbuildings over 120 square feet12. Power County adopts the 2018 International Building, Residential, Energy Conservation, Fire and Existing Building codes, with county amendments16. Separate Idaho electrical, plumbing or HVAC permits apply to covered trade work17. Building-permit fees are valuation-based, and plan review may cost up to 65 percent of the building-permit fee18. County construction requires six inspections before the next construction stage begins1920. A certificate of occupancy is required before a regulated building or use is occupied; a temporary certificate for weather-delayed improvements may last no more than 180 days2122.

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

Power County Building Administrator / Planning and Zoning handles county building-permit and land-use questions at 73 Fort Hall Ave. Ste. A American Falls, ID 83211, phone 208-226-762523. Submit complete blueprints 10 to 14 days before building, with a site plan showing property lines, structures, septic and wells, driveway access, easements and natural features; incomplete applications are not accepted2425. Inside American Falls, the city issues building permits26. Pocatello, mainly in Bannock County but reaching into Power County, also issues its own building permits27. Septic permitting for Power County addresses remains with Southeastern Idaho Public Health; Pocatello also regulates sewer connection and eligibility for private septic528. Idaho owners doing their own work on their own land without intending to sell within 12 months are exempt from contractor registration, but applicable permits and inspections still apply29.

Does Power County have zoning?

Power County has zoning districts, overlay districts and an official zoning map; land uses may require site-plan approval or a conditional-use permit, or may be prohibited330. The county rules here concern unincorporated land; Pocatello, a city reaching into Power County from Bannock County, has its own zoning, while septic permits remain with the health district315. Power County lists dwelling setbacks of 50 feet along arterial roads and 35 feet along other roads, measured from property lines, plus 10-foot side and rear setbacks in AG or RR zones327. A permitted residence generally needs 1 acre; certain approved subdivisions with central systems may have smaller lots, capped at 3 residences per acre3334. In RR Rural Residential, minimum lots increase to 5 acres on slopes over 15 percent and 2.5 acres in groundwater-vulnerability areas on slopes of 8 to 15 percent; RR buildings are capped at 35 feet3536. Ask Building Administrator / Planning and Zoning for parcel standards and the county clerk about later ordinances that may supersede posted code2337.

How do septic permits work in Power County?

Southeastern Idaho Public Health evaluates sites, issues septic permits and inspects installations in Power County under Idaho rules538. The Power County office is at 590 1/2 Gifford, American Falls, ID 83211, phone (208) 226-509639. Applications need a complete, signed and dated form, a warranty deed or tax notice, a to-scale plot plan and applicant-provided test holes 8 to 10 feet deep, depending on soil940. The district lists $300 for a speculative site evaluation and $925 for a full evaluation and permit if suitable; fees may change9. Only 35.4 percent of county soils are rated without severe limitations for conventional drain fields, so resolve septic feasibility before choosing the house location41. A septic system may not receive wastewater until final installation inspection and completion of as-built drawings; inspections requiring preparation need at least 48 hours’ notice, excluding weekends and holidays42. An onsite permit may be denied where public or central wastewater treatment is reasonably accessible43.

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

Unincorporated Power County prohibits using an RV or travel trailer as a single-family dwelling except to replace a home destroyed by fire or another catastrophe, for up to one year12. County-owned or leased land allows camping only at designated recreational facilities, where stays are limited to 14 consecutive nights unless the operator authorizes more time44. We could not confirm temporary camping rules for private land, tiny-home occupancy or a general minimum dwelling floor area; ask Power County Building Administrator / Planning and Zoning how the proposed structure and use fit the parcel’s zoning and building requirements2330. A manufactured home requires a county placement permit and inspection approval before occupancy under Idaho rules245.

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

  1. Ask Power County Building Administrator / Planning and Zoning to confirm the mapped zoning district, setbacks, subdivision restrictions and current forms236746.
  1. Arrange the septic application and site evaluation with Southeastern Idaho Public Health9.
  1. Have Power County Highway District personnel approve the travel way before seeking a building permit for a new dwelling4748. A driveway connecting to a state highway separately needs an Idaho Transportation Department encroachment permit49.
  1. If a private well is planned, obtain an Idaho Department of Water Resources drilling permit before drilling and use a state-licensed well driller15.
  1. Submit the complete plans 10 to 14 days before building and obtain state electrical, plumbing or HVAC permits where applicable2417. Before applying for or using electrical service, secure the county building permit; structures exempt from the IBC receive a zoning permit number instead50.
  1. Schedule the county’s six mandatory inspections, arrange the septic final inspection before wastewater use, then obtain the certificate of occupancy before using or occupying the regulated building204221.

What should you check before buying land in Power County?

Start with septic feasibility: only 35.4 percent of Power County soils are rated without severe limitations for a conventional drain field, and the health district requires test holes as part of its review419. Confirm legal access early because the travel way to a new dwelling needs Power County Highway District approval before the building permit is issued47. Construction, fill and other development in a special flood-hazard area require a development permit before work; all grading and excavation in the Floodplain Overlay District need a permit, including agricultural grading otherwise exempt5152. Water planning matters in a county averaging 16.1 inches of precipitation annually, and a new well needs an Idaho Department of Water Resources drilling permit before work starts5315. The effective property-tax rate is about 0.8 percent and the median annual property-tax bill is about $1,5775455.

Watch-outs

  • Power County will not issue a building permit for a new dwelling until Highway District personnel approve the travel way47.
  • Only 35.4 percent of Power County soils are rated without severe limitations for a conventional septic drain field, so obtain a site evaluation before fixing the house location41.
  • An RV or travel trailer cannot serve as a single-family dwelling in unincorporated Power County except for up to one year as a replacement after a home is destroyed by fire or another catastrophe12.
  • Power County’s agricultural-building exemption is limited to qualifying agricultural land of at least 5 acres, and exempt buildings still require a development permit and inspections10.

Sources

  1. 8-1-4: Permits Required, quoted and re-checked
  2. Building Administrator / Planning and Zoning, quoted and re-checked
  3. codelibrary.amlegal.com, quoted and re-checked
  4. Power County Comprehensive Plan, quoted and re-checked
  5. Septic Permits, quoted and re-checked
  6. Building Administrator / Planning and Zoning, quoted and re-checked
  7. Basic Requirements for Building Permits, quoted and re-checked
  8. Septic Permits, quoted and re-checked
  9. Septic Permits, quoted and re-checked
  10. 8-1-12: Exemptions, quoted and re-checked
  11. Building Permits, quoted and re-checked
  12. Power County Code § 10-1-5: Definitions, quoted and re-checked
  13. Frequently Asked Questions (FAQ) - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  14. How To Purchase a Trade Permit (Idaho statewide rule), quoted and re-checked
  15. Wells Overview (Idaho statewide rule), quoted and re-checked
  16. 8-1-13: Adoption of Codes, quoted and re-checked
  17. Frequently Asked Questions (FAQs) - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  18. 8-1-8: Fees, quoted and re-checked
  19. Building Permits, quoted and re-checked
  20. Six Required Inspections – Reminder to Contractors, quoted and re-checked
  21. 8-1-13-1: International Building Code Amendments, quoted and re-checked
  22. codelibrary.amlegal.com, quoted and re-checked
  23. Power County Building Administrator / Planning and Zoning (powercounty.gov)
  24. Basic Requirements for Building Permits, quoted and re-checked
  25. 10-2-2: Permit Requirements and Procedures, quoted and re-checked
  26. American Falls: American Falls Code § 9-2-2, Permit required (Power County), quoted and re-checked
  27. Pocatello: 15.04.030: Permits Required (Power County), quoted and re-checked
  28. Pocatello: 13.16.085: Connection To Proximate Sewer Required (Power County), quoted and re-checked
  29. Frequently Asked Questions (FAQ) - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  30. codelibrary.amlegal.com, quoted and re-checked
  31. Pocatello: Pocatello, ID Code of Ordinances (Power County), quoted and re-checked
  32. Basic Requirements for Building Permits, quoted and re-checked
  33. codelibrary.amlegal.com, quoted and re-checked
  34. 10-13-3: Adequate Infrastructure, quoted and re-checked
  35. 10-8-5: Specification Standards, quoted and re-checked
  36. 10-8-5: Specification Standards, quoted and re-checked
  37. Power County Comprehensive Plan, quoted and re-checked
  38. Septic and Septage, quoted and re-checked
  39. Southeastern Idaho Public Health, Power County Office (siphidaho.org)
  40. Septic Permits, quoted and re-checked
  41. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  42. IDAPA 58.01.03 – Individual/Subsurface Sewage Disposal Rules and Rules for Cleaning of Septic Tanks, quoted and re-checked
  43. IDAPA 58.01.03 Individual/Subsurface Sewage Disposal Rules (Idaho statewide rule), quoted and re-checked
  44. 7-6-1: Limitations on Camping, quoted and re-checked
  45. Building Archives - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  46. Building Administrator / Planning and Zoning, quoted and re-checked
  47. 8-1-11: Driveway Requirements, quoted and re-checked
  48. Basic Requirements for Building Permits, quoted and re-checked
  49. Types of Right-of-Way Encroachment Permits (Idaho statewide rule), quoted and re-checked
  50. 10-2-2: Permit Requirements and Procedures, quoted and re-checked
  51. 9-1-4: Development Permit Required, quoted and re-checked
  52. 10-2-2: Permit Requirements and Procedures, quoted and re-checked
  53. Annual precipitation: Bolthole Index county data
  54. Effective property tax rate: Bolthole Index county data
  55. Median property tax bill: Bolthole Index county data

Written October 12, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like all 6 of its neighbors, Power County requires a building permit for a home.

RulePower CountyOneida CountyBannock CountyBingham CountyMinidoka CountyCassia CountyFranklin County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsSoutheastern Idaho Public HealthSoutheastern Idaho Public HealthSoutheastern Idaho Public HealthSoutheastern Idaho Public HealthSouth Central Public Health DistrictSouth Central Public Health DistrictSIPH

County locator

Power County in Idaho

58
County map
Power County highlighted among the Idaho counties · colored by Index score

How Power County scores

Seclusion75100% ev.
Self-Sufficiency32100% ev.
Admin Boringness3890% ev.
Durability50100% ev.
Property Autonomy90100% ev.
Carry Cost81100% 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 →

$278kTypical home
0.8%Property tax
$3,930Land / acre
16.1"Annual rain
7.4% of yrsSevere drought
3.4 / yr (+3.2)Mid-century 100°F days
28.9 daysMid-century dry spell
0.86" (+6.5%)Mid-century 1-day rain
1.16×Wildfire change factor
100%Forward climate coverage
$1,156Home insurance / yr
4.7% / yrInsurance growth
1.03%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
2,500People within 30 min
564,785People within 2 hr
3,897Radius comparison (15 mi)
5.9People / sq mi
30.9%Federal land
60.8%Land at 15% slope or less
35.4%Soils rated "not limited" for septic (strict USDA rating)
293,396 acWorkable land screen
13.2%Wooded land
23.3 tonsBiomass / forest ac
45.8°FAvg temp

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Cities and towns in Power County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Rockland

Answers from the rulebook for Power County

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

Power County rules

  • Building permitRequired

    New construction, structural additions, alterations, qualifying outbuildings, interior remodels, re-roofing, re-siding, and manufactured-home placement in unincorporated Power County.

    • Painting and carpeting are excepted from the listed interior-remodel requirement.
    • County FAQ states agricultural buildings require permits, with a special farm-placement setback pathway.
    • Some activities are exempted under the development code, including certain agricultural grading and small accessory buildings, subject to stated floodplain and airport-safety exceptions.

    outbuilding threshold: > 120 sq ft (County FAQ lists outbuildings over 120 square feet.)

    “Any new construction, structural additions, alterations, out buildings over 120 Sq. Ft., all interior remodels except for painting and carpeting, re-roofing and re-siding projects, placing a manufactured home in or out of a park, window or replacement if the opening size will be larger than the door/windows taken out.”
    One more reviewed finding on this topic
    • Required — Construction, site preparation, enlargement, alteration, repair, moving, removal, demolition, conversion, occupancy, use of equipment, and agricultural buildings in unincorporated Power County.
      “No work, including site preparation, construction, enlargement, alteration, repair, move, remove, demolition, convert, occupancy, use equipment or agricultural building can be placed prior to obtaining a permit.”
  • Building code adoptedAdopted (with conditions)

    Building-code enforcement in unincorporated Power County.

    • Power County adopted the 2018 IBC, IRC, IECC, IFC, and IEBC, subject to county amendments.
    • Electrical, gas, mechanical, and plumbing provisions are identified as regulated under Idaho law in the IBC amendments.

    International Building Code: 2018 edition (subject to county amendments) · International Residential Code: 2018 edition (subject to county amendments) · International Energy Conservation Code: 2018 edition (subject to county amendments) · International Fire Code: 2018 edition (subject to county amendments) · International Existing Building Code: 2018 edition (subject to county amendments)

    “The following codes, except as herein amended, are hereby adopted and incorporated by reference as if fully set forth herein”
    One more reviewed finding on this topic
    • Adopted (with conditions) — Unincorporated Power County building and grading activity.
      “The following codes, except as herein amended, are hereby adopted and incorporated by reference as if fully set forth herein, and shall apply in the unincorporated areas of Power County.”
  • InspectionsRequired

    Construction under Power County building permits.

    • The county lists footing, foundation, concrete slab or under-floor, frame, lath and/or gypsum board, and final inspections.
    • Inspections must be completed before commencing the next construction step.

    required inspections: 6 inspections (the page enumerates footing, foundation, concrete slab or under-floor, frame, lath and/or gypsum board, and final inspection)

    “There are six required inspections on each building permit issued for construction in Power County.”
    One more reviewed finding on this topic
    • Required — Construction requiring a Power County building permit.
      “Lists the six mandatory inspections contractors must schedule during construction. Serves as a reminder of timing, scope, and procedural requirements for each inspection stage.”
  • Certificate of occupancyRequired

    Occupation of buildings or uses governed by the Power County development code.

    • A temporary certificate may be issued when weather prevents prompt completion of required improvements such as landscaping.
    • A temporary certificate is valid for no more than 180 days.
    • Occupancy without the certificate is a violation.

    temporary certificate maximum duration: 180 days

    “A certificate of completion/occupancy shall be issued before any building or use is occupied.”
    One more reviewed finding on this topic
    • Required — Use or occupancy of buildings and structures regulated by the Power County building code.
      “No building or structure shall be used or occupied [...] until the building official has issued a certificate of occupancy therefor as provided herein.”
  • County-wide zoningPresent (with conditions)

    Private land throughout Power County, including land in the county's listed zoning categories.

    • The cited source is the county comprehensive plan rather than the full current zoning code.
    • The plan lists Agricultural, Rural Residential, Residential (Area of Impact), Recreational, Commercial, Heavy Industrial, and Light Industrial categories.
    • The Power County code webpage states that later ordinances may supersede the posted code and advises consulting the county clerk regarding amendments, supersession, or repeal.

    zoning categories: 7 categories

    “Private land within the county is zoned for one of seven categories.”
    One more reviewed finding on this topic
    • Present (with conditions) — County zoning districts and overlay districts.
      “This chapter creates zoning districts and overlay districts for use in the County and adopts an official map of those districts.”
  • Local zoningVaries (with conditions)

    Local zoning and planning within Power County, aggregated across the county, including incorporated cities and county areas.

    • The county plan states that each city and county has a planning and zoning commission and comprehensive-plan responsibility.
    • For Areas of City Impact, the plan says procedures apply comprehensive plans, zoning regulations, and subdivision ordinances and assign roles and responsibilities to the city and county at each review stage.
    • This is an aggregate conclusion; the source does not establish that Power County administers every municipal ordinance or identify the complete current zoning code for American Falls or Rockland.
    “The agreement established formal procedures outlining the application of comprehensive plans, zoning regulations, and subdivision ordinances within the designated ACI. These procedures address review process steps and assign the roles and responsibilities of the city and county for each stage of the review process.”
  • Zoning districtsPublished (with conditions)

    County zoning districts and overlay districts.

    • The land-use summary identifies A, HI, LI, C, RR, RR-3, and REC districts.
    • Uses may be permitted by site-plan approval, permitted by conditional-use permit, or not permitted.
    “This chapter creates zoning districts and overlay districts for use in the County and adopts an official map of those districts.”
    One more reviewed finding on this topic
    • Published (with conditions) — County zoning districts and development rules in unincorporated Power County.
      “The land use categories are generally consistent with existing zoning districts.”
  • Minimum lot sizeSpecified

    Permitted residences in unincorporated Power County under the countywide development standards.

    • In certain approved subdivisions, lot size may be less than one acre but may not exceed three residences per acre with central systems.
    • On-site sewage disposal systems must comply with state standards.
    • Central water and sewerage utilities must comply with state standards and may be required on subdivision lots of less than one acre.

    minimum lot size for a permitted residence: 1 acre (certain approved subdivisions may be less than one acre, not exceeding three residences per acre with central systems) · maximum density in certain approved subdivisions with less-than-one-acre lots: <= 3 residences per acre (central systems required)

    “The minimum lot size for a permitted residence is a minimum of one acre. In certain approved subdivisions, lot size may be less than one acre but not to exceed three (3) residences per acre with central systems.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Permitted development in Power County's RR Rural Residential Zoning District.
      “The specification standards for the RR Zoning District shall be as shown in the following table: [...] Minimum lot size (varies with land type): Slopes over 15 percent 5 acres Ground water vulnerability areas, slopes of 8 percent - 15 percent 2.5 acres Other lands 1 acre, except in certain approved subdivisions Mobile home parks on other lands, with approved water and sewerage systems 6 units per acre Multiple-family dwellings on other lands with approved water and sewerage systems 12 units per acre”
  • SetbacksSpecified

    Specified building and site setbacks in unincorporated Power County.

    • The county page states that all distances are from the property line.
    • Setbacks may vary by roadway and zoning district.

    wells, irrigation, or domestic: 50 feet (along arterial roads and along other roads/property lines) · granaries, etc.: 60 feet (along arterial roads and along other roads/property lines) · dwellings from arterial roads: 50 feet (35 feet from other roads) · dwellings from side and rear property lines in AG or RR Zone: 10 feet (county page states side and AG or RR Zone and rear property line)

    “(All distances are from the property line)”
    One more reviewed finding on this topic
  • Building heightDistrict specific (with conditions)

    RR Rural Residential zoning district.

    maximum building height: 35 feet

    “Maximum building height | 35 feet Minimum setback from:”
  • Living in an RVLimited

    Camping involving recreational vehicles or travel trailers on county-owned or leased property, designated county recreational camping facilities, and public access land covered by the ordinance

    • Camping on county-owned or leased property or facilities is prohibited unless the location is designated as a recreational campground, area, or facility.
    • At a designated recreational camping ground, area, or facility, a camp may not be maintained for more than fourteen consecutive nights unless additional time is authorized by the operating entity.
    • Posted time or daytime-use limitations must be followed at campground facilities or public access land covered by the section.
    • Violation is an infraction subject to a one-hundred-dollar fine plus court costs.

    maximum stay at designated recreational camping facility: <= 14 consecutive nights (Additional time may be authorized for the specific camping ground by the operating entity) · fine: 100 USD (Plus court costs)

    “shall maintain a camp [...] for more than fourteen (14) consecutive nights, unless additional time is authorized for the specific camping ground by the operating entity.”
    2 more reviewed findings on this topic
    • Temporary only (with conditions) — Use of a recreational vehicle or travel trailer as a single-family dwelling in unincorporated Power County.
      “Recreational vehicles and travel trailers shall not be used as single-family dwellings, except that a recreational vehicle or travel trailer may be used as a temporary dwelling to replace a home destroyed by fire or other catastrophe for a period of up to one year.”
    • Temporary only (with conditions) — Use of a recreational vehicle or travel trailer as a single-family dwelling under the Power County development code.
      “Recreational vehicles and travel trailers shall not be used as single-family dwellings, except that a recreational vehicle or travel trailer may be used as a temporary dwelling to replace a home destroyed by fire or other catastrophe for a period of up to one year.”
  • Who permits septicLocal (with conditions)

    Onsite septic permitting services for Power County through Southeastern Idaho Public Health.

    • The health district requires a complete, signed, and dated application and plot plan.
    • The applicant must pay the applicable fee: $300 for a speculative site evaluation or $925 for site evaluation and permit if the site is suitable.
    • The application must include a warranty deed or tax notice and a plot plan to scale.
    • The application will not be taken without the listed information.
    • An onsite evaluation is required for all applications, and the applicant must provide test holes at least 8-10 feet deep depending on soil type.
    • The listed fees are subject to change.
    • The page also links to Idaho's statewide IDAPA 58.01.03 rules, which establish requirements for installation permits and installer registration permits.

    speculative site evaluation fee: 300 USD · site evaluation and permit fee if site is suitable: 925 USD · test-hole depth: 8-10 feet (depending on the soil type)

    “From FY2019 through FY2023, SIPH issued 2,550 permits, conducted 1,903 inspections, and licensed installers, pumper companies, and pumper trucks. [...] Power | 4%”
    2 more reviewed findings on this topic
    • Local (with conditions) — Power County onsite and subsurface sewage disposal systems.
      “Power County 590 1/2 Gifford American Falls, ID 83211 (208) 226-5096”
    • Mixed (with conditions) — Individual, large soil absorption, and alternative onsite wastewater systems in Power County, which the Idaho Department of Health and Welfare lists within Southeastern Idaho Public Health's county service area.
      “Idaho’s seven public health districts administer these rules under a memorandum of understanding (MOU) with DEQ. The public health districts conduct site evaluations, issue septic system permits, inspect installations, and assist with property-specific questions about permitting, existing systems, and permit records.”
  • Septic permitRequired

    Applications for on-site septic systems in the Southeastern Idaho Public Health service area, including Power County.

    • Applications require a complete, signed, and dated application and plot plan.
    • A warranty deed or tax notice and a to-scale plot plan are required.
    • An onsite evaluation is required for all applications, and the applicant must provide test holes 8–10 feet deep depending on soil type.
    • The page lists a $300 speculative site-evaluation fee and a $925 full site-evaluation-and-permit fee; a separate fee table lists fees subject to change.

    speculative site evaluation fee: 300 USD · full site evaluation and permit fee if site is suitable: 925 USD

    “The Provisions of these rules [...] establish the requirements for obtaining an installation permit and an installer’s registration permit.”
    One more reviewed finding on this topic
    • Required — Individual and subsurface sewage disposal systems in Power County.
      “The Provisions of these rules establish limitations on the construction and use of individual and subsurface sewage disposal systems and establish the requirements for obtaining an installation permit and an installer’s registration permit.”
  • Mandatory utility hookupConditional

    Electrical service for newly built or placed structures in Power County.

    • A building permit is required before electrical service; if the structure is exempt from the IBC, a zoning permit number is issued instead.
    • The county basic requirements also direct applicants to obtain septic and state electrical, plumbing, and HVAC permits when needed.
    “No person may apply for or use electrical service in any newly placed or built structure without first securing a building permit for the construction or placement of the structure.”
    One more reviewed finding on this topic
    • Conditional — Electrical service to a new building or mobile home in unincorporated Power County.
      “No owner [...] may apply for or use electrical service [...] without first securing a building permit for the construction or placement of the structure.”
  • Agricultural exemptionConditional

    Agricultural buildings on qualifying agricultural land in unincorporated Power County.

    • Land must be actively devoted to agriculture and be at least five acres.
    • Buildings may house farm implements, hay, grain, poultry, or other agricultural products.
    • Buildings may not be places of human habitation or employment where agricultural products are processed.
    • Exemption is unavailable where agriculture is not the primary use or in platted residential subdivisions.
    • Exempted buildings still require a development permit and building inspections and may be subject to zoning and administrative fees.

    minimum qualifying acreage: >= 5 acres (agricultural use must be primary and the land may not be in a platted residential subdivision)

    “This chapter does not apply to agricultural buildings constructed on land actively devoted to agriculture [...] on land of five (5) acres or more.”
    One more reviewed finding on this topic
    • Available (with conditions) — Agricultural buildings qualifying under Power County's agricultural-building certification process.
      “Certifies ag buildings for exemption from code requirements. Owner must agree to terms if use changes.”
  • Subdividing landRegulated (with conditions)

    Subdivision and development in Power County.

    • The development code includes a subdivision ordinance and requires adequate infrastructure, state-compliant sewage disposal, and safe direct access to a dedicated public road.
    • Certain approved subdivisions may have lots smaller than one acre with central systems, subject to density limits.

    minimum residential lot size: >= 1 acre (certain approved subdivisions with central systems) · maximum density in certain approved subdivisions: <= 3 residences per acre (central systems)

    “In certain approved subdivisions, lot size may be less than one acre but not to exceed three (3) residences per acre with central systems.”
    One more reviewed finding on this topic
  • Driveway accessRequired

    Building and development projects requiring access approval in Power County.

    • The county basic permit requirements direct applicants to obtain a Power County Highway Permit.
    • Roadway-specific setback requirements may apply.
    “Obtain Power County Highway Permit; (Phone: 208-226-2661”
    One more reviewed finding on this topic
    • Required — Access to a new dwelling in unincorporated Power County.
      “A building permit will not be issued for any new dwelling until the travel way to the dwelling has been approved”
  • Building in a floodplainRequired

    Construction and development within areas of special flood hazard in Power County.

    • The permit applies to all structures, including manufactured homes, and all development including fill and other defined activities.
    • The cited ordinance was adopted June 22, 1987.
    “A development permit shall be obtained before construction or development begins within any area of special flood hazard”
    One more reviewed finding on this topic
    • Limited — Grading, excavation, and otherwise exempt accessory construction in the Floodplain Overlay District.
      “Excavation or grading for agricultural purposes, or that is exempt from the requirements of the International Building Code, except where such excavation or grading is for the purpose of mining, which is not permitted in some zoning districts, or within the Floodplain Overlay District, where all grading and excavation is subject to permit.”
  • Permit feesPublished (with conditions)

    Power County building-permit fees and plan-review fees.

    • Fees are valuation-based and include the schedules in section 8-1-8.
    • A plan-review fee for new buildings, additions, and remodels may be assessed at up to 65 percent of the building permit fee.
    • The cited section was amended by Ordinance O-2024-02 passed January 22, 2024.

    plan review fee maximum: <= 65 percent of building permit fee (for new buildings, additions, and remodels; building official may assess less)

    “Permit fees are required and shall be based on this section and section 8-1-9 of this chapter.”
  • Permit processPublished (with conditions)

    Building-permit process in unincorporated Power County.

    • Applicants must obtain necessary permits, a Power County Highway Permit, and a septic permit from the State Health Department when applicable.
    • Complete blueprints must be submitted 10–14 days before building; larger commercial and residential projects require an engineer's or architect's original stamp.
    • Site plans must show property lines, structures, septic and well locations, driveway access, easements, natural features, and other listed items.
    • A complete set of plans is required for any site-built house, addition, or outbuilding.

    blueprint submission lead time: 10-14 days before building (larger commercial and residential projects require original engineer's or architect's stamp)

    “10 to 14 days before building, submit a complete set of blueprints to the Power County Building Administrator.”
    One more reviewed finding on this topic
    • Published (with conditions) — Power County building and development permit applications.
      “Applications shall be submitted on forms provided by the County. Multiple copies of applications and supporting materials, including a site plan, may be required by the Administrator. Applications shall contain all information required to demonstrate compliance with this title and no incomplete application shall be accepted.”

Idaho rules that apply here

  • Owner-builder exemptionConditional

    Homeowners personally performing plumbing work on their own residential premises in Idaho.

    • The homeowner must own the residential property and personally perform the permitted work.
    • The homeowner permit is valid only for a primary or secondary residence and associated outbuildings.
    • Associated outbuildings must not be used for commercial purposes or rented by a tenant.
    • The homeowner must accept responsibility for all work performed.
    • All work must be inspected by the Division of Occupational and Professional Licensing.
    • A plumbing permit must be obtained by application to the Division.
    • The application must be submitted with payment.
    • The application form states that an additional $65 fee may be assessed if the location is not clearly provided by directions or an attached map.
    • The application was revised 8/17/2022; this revision date is not treated as an effective date.

    unclear-location fee: 65 USD (May be assessed if the location is not clearly given by directions or an attached map.)

    “I certify that I am the owner of the residential property and will personally perform the work covered by this permit.”
    4 more reviewed findings on this topic
    • Available — An owner performing their own construction work on the owner's own land in Idaho.
      “A: Any person who engages in a construction job with a dollar amount exceeding $2000.00 (materials & labor) and is not otherwise exempt (The exemptions are listed below); [...] Owners: Owners who do their own work on their own land and do not intend to sell the property within 12 months are exempt from registration.”
    • Conditional — An Idaho homeowner undertaking construction or trade work for which a state-administered permit process applies.
      “Public (Homeowners Only) [...] *Public: “Homeowner” is pre-selected. [...] Once payment is processed, you may choose “Request Inspection” and/or “Print Permit””
    • Conditional — Owners performing construction work on their own land in Idaho under the state contractor-registration system.
      “Owners who do their own work on their own land and do not intend to sell the property within 12 months are exempt from registration.”
    • Conditional — Homeowners personally performing electrical work on a primary or secondary residence and related outbuildings in Idaho.
      “Homeowners may purchase a permit only when they themselves are doing electrical work on their primary or secondary residence and/or related outbuildings.”
  • 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”
  • Manufactured homesLimited

    Occupancy of manufactured homes installed in Idaho.

    • For new homes in areas without an approved local building program, an installation permit and installation tag are required before installation begins.
    • All installations must be inspected and approved by DOPL or the authority having jurisdiction before the manufactured home is occupied.
    • Manufactured homes are for residential use only and are regulated under federal manufactured-housing standards plus state and local requirements.
    “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. 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.”
  • 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 in Power County, under Idaho's statewide septic rules and administered through the public health district.

    • A valid installation permit is required before installing, modifying, repairing, or expanding an individual or subsurface sewage disposal system, except for the rule's stated permit exceptions in IDAPA 58.01.03 subsection 005.02.
    • No system may receive wastewater until the Director conducts a final installation inspection and completes as-built drawings and specifications.
    • The Director provides the owner a copy of the final as-built drawing within thirty days after completing the final inspection.
    • For inspections requiring preparation, the applicant or permittee must provide at least forty-eight hours' advance notice, excluding weekends and holidays.

    advance inspection notice: >= 48 hours (excluding weekends and holidays) · final as-built drawing delivery: <= 30 days (after completion of the final inspection)

    “No system may receive wastewater until the Director conducts a final installation inspection and completes as-built drawings and specifications depicting the actual installation. The Director will provide a copy of the final as-built drawing to the owner within thirty (30) days after completing the final inspection.”
    One more reviewed finding on this topic
    • Required — Individual and subsurface sewage disposal systems constructed or installed under Idaho’s onsite wastewater rules.
      “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.”
  • Campground & park staysLimited

    Temporary camping in Idaho State Parks administered by the Idaho Department of Parks and Recreation.

    • Camping is permitted only in designated areas.
    • Stays are limited to 14 nights in a 30-day period; the same page's FAQ separately states a 15-day limit, creating an unresolved internal discrepancy.
    • Individual-site occupancy is limited to one family unit or no more than 8 persons unless otherwise specified; companion-site and site-design restrictions apply.
    • Camping is not permitted on beaches, parking lots, or day-use facilities.
    • Check-in is at 2 p.m. for campsites and checkout is at 1 p.m.; late checkouts may incur additional fees unless prior arrangements have been made.

    state-park stay limit: 14 nights in 30 days (FAQ on the same page states 15 days in any 30-day period) · individual-site people limit: <= 8 people (one family unit or site-specific limits may apply)

    “Camping is permitted only in designated areas. [...] Stays are limited to 14 nights in a 30-day period.”
  • county zoning authorityGeneral

    Idaho counties adopting zoning for unincorporated areas through their boards of county commissioners.

    • A board of county commissioners is a governing board and may exercise the powers authorized by the Local Land Use Planning Act.
    • The county board's powers under the chapter apply to the unincorporated area of the county.
    • Zoning must be adopted, amended, or repealed by ordinance using the notice and hearing procedures in Idaho Code § 67-6509.
    • Zoning districts must conform to the adopted comprehensive plan.
    • Within zoning districts, standards may regulate or restrict building height, number of stories, size, construction, reconstruction, alteration, repair or use of buildings and structures; lot occupancy; courts, yards and open spaces; population density; and building and structure location and use.
    • Standards must be uniform for each class or kind of building throughout each district, but may differ between districts.
    • Overlay zoning districts require clear and objective standards and must not constitute a regulatory taking under Idaho or federal law.
    “The powers of the board of county commissioners conferred by this chapter shall apply to the unincorporated area of the county.”
  • county building authorityGeneral

    Idaho counties' authority to adopt and enforce building codes and require permits for residential construction in unincorporated areas when the county operates a building-code enforcement program.

    • The statute defines local government as any city or county of Idaho.
    • A local government that had not previously implemented a code-enforcement program may elect to implement one by ordinance evidencing its intent to do so.
    • Construction in a local-government jurisdiction enforcing building codes requires a permit under the applicable local ordinance.
    • A local government issuing permits and performing enforcement must adopt the specified state-adopted codes and may amend them only within the limits stated in Idaho Code § 39-4116(4).
    • Local amendments must generally provide at least an equivalent level of protection; accessibility amendments are restricted, and additional residential-code amendments require the statutory good-cause, necessity, ordinance, public-hearing, publication, and notice procedures.
    • Single-family homes and multiple-family dwellings up to two units are exempt from automatic fire-sprinkler requirements in the enumerated codes.
    • Agricultural buildings must be exempted; a county may issue farm-building permits only for road setbacks and utility easements, at no more than actual issuance cost.
    • Permits are governed by the laws in effect when the application is received.
    • The state division retains jurisdiction for in-plant inspections and installation standards for manufactured or mobile homes and for in-plant inspections and enforcement of modular-building and commercial-coach construction standards.
    “"Local government" means any city or county of this state.”

Still unanswered

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

  • Minimum dwelling size — Minimum dwelling size in unincorporated Power County.
  • Lot coverage — Lot coverage limits in unincorporated Power County.
  • Tiny homes — Tiny-home occupancy in unincorporated Power County.
  • Off-grid sanitation — Off-grid sanitation systems in Power County.
  • Short-term rentals — Short-term rental use in unincorporated Power 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.

Water rights & wells in Power 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 ↗

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 Power County, Idaho

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

Power County scores 58/100 on the Bolthole Index, a solid county profile. Its strengths: a stronger property-autonomy legal backdrop and manageable long-term carry cost. Watch-outs: thin water margin (16.1″/yr rainfall) and more administrative friction around building and land use.

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

Power County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Southeastern Idaho Public Health (District 6). 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.

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

Living in an RV on your own land in Power County is limited to specific cases: Camping involving recreational vehicles or travel trailers on county-owned or leased property, designated county recreational camping facilities, and public access land covered by the ordinance Camping on county-owned or leased property or facilities is prohibited unless the location is designated as a recreational campground, area, or facility. At a designated recreational camping ground, area, or facility, a camp may not be maintained for more than fourteen consecutive nights unless additional time is authorized by the operating entity. Confirm with the county before relying on it.

How much does land cost in Power County, Idaho?

Land in Power County runs about $3,930 per acre, based on the latest county data.

What is the water situation in Power County?

Power County gets about 16.1" of rain a year, with severe drought in roughly 7.4% of years. On water rights, Power 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 Power County?

A representative private-land location has about 2,500 people within a 30-minute drive and 564,785 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Power compares in Idaho

Compare side-by-side →See all 44 Idaho counties ranked →