Bolthole Index

Lewis County, Idaho

Building permits, zoning and septic rules in Lewis County, Idaho

70Index Score / 100
#8 of 44 in Idaho

Unincorporated Lewis County, Idaho requires a building permit, with the county Planning and Zoning office serving as the local contact12. Lewis County also administers zoning districts and land-use permitting for unincorporated land, and incorporated places can set their own rules3. Idaho DEQ sets the septic rules, while Public Health – Idaho North Central District evaluates sites, issues permits and inspects installations in Lewis County4.

At a glance

Building permit
Required for construction in unincorporated Lewis County; start with Planning and Zoning12
Zoning
Yes; Lewis County administers zoning districts and land-use permitting3
Septic
Get a health-district permit before installation; the district inspects the installed system56
RV living
Not confirmed for private land; ask Planning and Zoning how the proposed use is classified2
Tiny home
No county occupancy or minimum-size rule was confirmed; ask Planning and Zoning before choosing a design2
Owner-builder
An owner working on their own land can be exempt from contractor registration, but permits and inspections can still apply78
Wells
Get an IDWR drilling permit and use an IDWR-licensed well driller9

Who to call

Zoning

Lewis County Planning and Zoning

Building and zoning questions and scheduling inspections in Lewis County

(208) 937-2661

pz@lewiscountyid.org

510 Oak Street, Nezperce, Idaho 83543

Septic permits

Public Health – Idaho North Central District, Lewis County office

Septic applications, site evaluations, permits and inspections for Lewis County

(208) 935-2124

132 N Hill Street, Kamiah, ID 83536

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 Lewis 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 Lewis County, Idaho?

Construction in unincorporated Lewis County requires a county building permit obtained through Planning and Zoning1. Idaho adopts international building codes with state amendments; that statewide framework does not establish Lewis County’s own code ordinance or approved local building program1011. Electrical, plumbing and HVAC work also requires trade permits, although the administering jurisdiction can vary by location12. Lewis County's page directs callers to Planning and Zoning for information and to schedule an inspection, but it does not publish the full local application or inspection sequence2. An owner doing work on their own Idaho land can qualify for an exemption from contractor registration if they do not intend to sell within the applicable period, but that does not erase project-specific permit or inspection requirements78.

Who issues building permits in Lewis County, and how do you reach the office?

Lewis County Planning and Zoning is the first contact for unincorporated-area building questions and inspection scheduling; call (208) 937-2661, email pz@lewiscountyid.org or visit 510 Oak Street, Nezperce, Idaho 835432. Ask for the required applications, plans, fee quote and inspection sequence2. Inside Kamiah and Craigmont, the city handles building permits; septic permitting remains with Public Health – Idaho North Central District13144. When Idaho DOPL administers a building permit, its fee depends on total construction valuation, and plan review costs $100 per hour with a minimum of 40% and maximum of 65% of the calculated building permit fee15. Those state charges do not establish the local Lewis County fee; confirm the administering authority and applicable charges with Planning and Zoning162.

Does Lewis County have zoning?

Lewis County administers a Zoning and Development Ordinance that establishes zoning districts and land-use permitting3. For an unincorporated parcel, ask Planning and Zoning to identify the district and confirm the uses and dimensional standards that apply32. Specific setbacks, minimum lot sizes, lot coverage, height limits and a minimum dwelling size could not be confirmed from an accessible official rule, so request the standards for the actual parcel from Planning and Zoning2. The county answers here concern unincorporated land; Kamiah, Nezperce and Craigmont set their own zoning, while septic permitting remains with Public Health – Idaho North Central District1718194. New manufactured-home installations in areas without an approved local building program require a state installation permit and tag, and every installation must be inspected and approved by the state division or other authority having jurisdiction before occupancy2021.

How do septic permits work in Lewis County, and who issues them?

Idaho DEQ establishes the septic rules, while Public Health – Idaho North Central District conducts site evaluations, issues permits and inspects installations in Lewis County4. A property owner must obtain the district permit before installing an individual septic system5. Start with the Lewis County office at 132 N Hill Street, Kamiah, or call (208) 935-212422. The application requires a legal description, parcel number, plot plan, payment and site evaluation; new construction and modifications also require a floor plan23. A typical evaluation uses at least 2 test holes, spaced at least 50 feet apart and dug to 8 feet, although site conditions can require deeper work23. After permit issuance, the system is installed and then inspected by the public health district6. A homeowner may install a standard/basic system on the homeowner's own property without hired help; that narrow exception does not waive the septic permit or district inspection2456. Only 3.9% of county soils are rated without severe limits for a conventional drain field, so make septic feasibility an early purchase contingency25.

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

We could not confirm Lewis County's rules for residential RV use, construction-period camping, tiny-home occupancy or minimum dwelling size; ask Planning and Zoning how the exact unit and intended use fit the parcel's zoning district23. A health-district septic permit is required before installing an individual septic system, but the confirmed septic rules do not answer every off-grid sanitation proposal; ask Public Health – Idaho North Central District about the proposed wastewater method522. Manufactured homes also have installation-permit and pre-occupancy inspection requirements, which do not establish whether the county allows the proposed use on a particular parcel2021.

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

  1. Ask Lewis County Planning and Zoning to confirm that the parcel is outside a city, identify its zoning district and list the county approvals for the proposed home32.
  1. Apply through Planning and Zoning for the required county building permit, confirm the local fee and obtain the office's inspection schedule12. Do not substitute Idaho's state building and modular fee resources for a Lewis County fee quote16.
  1. Submit the health district's septic application with the legal description, parcel number, plot plan, floor plan and payment, then schedule the site evaluation23.
  1. If the project needs a well, obtain an IDWR drilling permit before drilling and use an IDWR-licensed well driller26.
  1. Arrange the separate electrical, plumbing and HVAC permits required for that work12.
  1. If the driveway enters a state highway right-of-way, secure an Idaho Transportation Department encroachment permit before work there27.
  1. Confirm the building inspection and occupancy requirements with Planning and Zoning, and arrange the public-health-district septic inspection after installation26.

What should you check before buying land in Lewis County?

Make the offer contingent on written confirmation of the parcel's jurisdiction, zoning district, allowed use, setbacks and access because the available county page does not publish those parcel-level standards32. Order the septic site evaluation early: only 3.9% of Lewis County soils are rated without severe limitations for a conventional drain field25. A septic application must show property boundaries, existing features, improvements, the proposed system location and a replacement area23. Confirm well feasibility before treating groundwater as assured; drilling requires an IDWR permit and an IDWR-licensed driller26. Terrain also deserves an onsite look because 51.1% of county land is at a slope of 15% or less and 27.1% is wooded2829. For carrying costs, the typical effective property-tax rate is about 0.7%, and the median annual bill is about $1,3483031.

Watch-outs

  • Lewis County's setbacks, minimum lot size and minimum dwelling size could not be confirmed; get the standards for the specific parcel from Planning and Zoning before designing2.
  • Only 3.9% of Lewis County soils are rated without severe limits for a conventional drain field, so make district site approval a purchase contingency25.
  • Lewis County's private-land RV and tiny-home occupancy rules could not be confirmed; describe the unit and intended use to Planning and Zoning before buying2.

Sources

  1. Lewis County Idaho Planning and Zoning (2026 county census)
  2. Lewis County Planning and Zoning (lewiscountyid.us)
  3. Lewis County Zoning and Development Ordinance No. 1997-2 (2026 county census)
  4. Septic Systems, quoted and re-checked
  5. Septic and Septage, quoted and re-checked
  6. Septic and Septage, quoted and re-checked
  7. Frequently Asked Questions (FAQ) - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  8. How To Purchase a Trade Permit (Idaho statewide rule), quoted and re-checked
  9. Well Construction & Drilling, quoted and re-checked
  10. IDAPA 24.39.30 — Rules of Building Safety, quoted and re-checked
  11. Idaho Building Code Act, quoted and re-checked
  12. Frequently Asked Questions (FAQs) - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  13. Kamiah: Building Permits & Inspections (Lewis County), quoted and re-checked
  14. Craigmont: 9-1-3 Building Permits (Lewis County), quoted and re-checked
  15. 24.39.30 – Rules of Building Safety (Building Code Rules), quoted and re-checked
  16. Plan Review and Permits, quoted and re-checked
  17. Kamiah: 17.04.010: Title (Lewis County), quoted and re-checked
  18. Nezperce: § 155.002 Zoning districts (Lewis County), quoted and re-checked
  19. Craigmont: Title 10 Zoning Regulations (Lewis County), quoted and re-checked
  20. Building Archives - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  21. Building Archives - Division of Occupational and Professional Licenses (Idaho statewide rule), quoted and re-checked
  22. Public Health – Idaho North Central District, Lewis County office (idahopublichealth.com)
  23. Septic Permit Application, quoted and re-checked
  24. Septic and Septage, quoted and re-checked
  25. 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
  26. Wells Overview, quoted and re-checked
  27. Types of Right-of-Way Encroachment Permits (Idaho statewide rule), quoted and re-checked
  28. Share of land at 15% slope or less: Bolthole Index county data
  29. Wooded share of land: Bolthole Index county data
  30. Effective property tax rate: Bolthole Index county data
  31. 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, Lewis County has countywide zoning.

RuleLewis CountyNez Perce CountyClearwater CountyLatah CountyIdaho CountyBenewah CountyShoshone County
Building permitRequiredRequiredRequiredRequiredNot requiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsPublic HealthPublic HealthPublic HealthPublic HealthPublic HealthPanhandle Health DistrictPanhandle Health District

County locator

Lewis County in Idaho

70
County map
Lewis County highlighted among the Idaho counties · colored by Index score

How Lewis County scores

Seclusion81100% ev.
Self-Sufficiency44100% ev.
Admin Boringness4090% ev.
Durability62100% ev.
Property Autonomy90100% ev.
Carry Cost82100% 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 →

$292kTypical home
0.7%Property tax
$2,819Land / acre
24.9"Annual rain
8.6% of yrsSevere drought
2.6 / yr (+2.4)Mid-century 100°F days
24.3 daysMid-century dry spell
0.88" (+5.7%)Mid-century 1-day rain
1.25×Wildfire change factor
100%Forward climate coverage
$1,175Home insurance / yr
4.7% / yrInsurance growth
2.67%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
102,845People within 2 hr
5,497Radius comparison (15 mi)
7.8People / sq mi
1.9%Federal land
51.1%Land at 15% slope or less
3.9%Soils rated "not limited" for septic (strict USDA rating)
11,884 acWorkable land screen
27.1%Wooded land
19.3 tonsBiomass / forest ac
46°FAvg temp

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Cities and towns in Lewis 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: Reubens

Answers from the rulebook for Lewis County

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

Lewis County rules

  • Who permits septicMixed (with conditions)

    Lewis County onsite sewage systems administered locally by Public Health–Idaho North Central District under statewide DEQ rules.

    • Idaho DEQ establishes the statewide rules.
    • Public health districts administer the rules under an MOU with DEQ.
    • The district conducts site evaluations, issues permits, and inspects installations.
    “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.”
    One more reviewed finding on this topic
    • Local (with conditions) — Onsite wastewater systems in Lewis County, administered by Public Health-Idaho North Central District.
      “North Central Health District Clearwater, Idaho, Latah, Lewis, and Nez Perce Counties”
  • Septic permitRequired

    Installation of individual or large soil absorption onsite wastewater systems serving property in Lewis County.

    • The property owner must obtain a permit from the public health district.
    • Large soil absorption systems require a nutrient-pathogen evaluation, professional-engineer design, DEQ plan and specification review, and a licensed complex installer.

    large soil absorption system threshold: >= 2500 gallons per day

    “the property owner must obtain a permit from a public health district”
    One more reviewed finding on this topic
    • Required — Installation of individual septic systems and other onsite sewage systems serving property in Lewis County.
      “To have a septic system installed, the property owner must obtain a permit from a public health district.”
  • Septic inspectionRequired

    Installation of onsite wastewater systems in Lewis County.

    • After the permit is issued, the system should be installed by a licensed installer and inspected by the public health district.
    • Large soil absorption systems are inspected by both the public health district and DEQ.
    “Once the permit has been issued, the system should be installed by a licensed installer and inspected by the public health district.”
  • Permit processPublished

    Septic-permit application process for Lewis County properties.

    • The application requires a legal description and parcel number.
    • The plot plan must show boundaries, existing features, improvements, proposed system location, and replacement area.
    • A floor plan is required for all new construction or modifications to an existing structure.
    • Payment and site evaluation are required steps.
    • Typical site evaluation includes at least two test holes at least 50 feet apart and dug to 8 feet; deeper holes may be required depending on site conditions.

    minimum number of typical test holes: >= 2 holes (Typical requirement; site conditions may require more or deeper work) · minimum test-hole separation: >= 50 feet · typical test-hole depth: 8 feet (May need to be deeper depending on site conditions)

    “A minimum of two (2) test holes dug at least 50 feet apart”
  • County-wide zoningPresent

    Lewis County administers a Zoning and Development Ordinance (No. 1997-2) establishing zoning districts and land use permitting.

    Lewis County Zoning and Development Ordinance No. 1997-2 ↗Scouted from the county site, not yet independently re-checked

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
  • 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.”
    5 more reviewed findings on this topic
    • Conditional — Installation of a standard/basic septic system on the homeowner's property in Idaho, including Lewis County.
      “In Idaho, all septic systems must be installed by a licensed basic or complex installer (unless a homeowner establishes a standard/basic system on their property with no hired help).”
    • 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.”
  • Building code adoptedAdopted (with conditions)

    Building construction in Idaho subject to the Idaho Building Code Act and the Idaho Division of Occupational and Professional Licenses building-code program.

    • The adopted codes include amendments identified by Idaho; local-government application is subject to the Idaho Building Code Act.
    • The reference to the 2020 Edition is an identifier to the legislative session in which amendments were adopted.
    • Amendments can be made in any legislative cycle regardless of code cycle.
    • The cited DOPL page states that existing rules remain in effect for 2026–2027.

    International Building Code: 2018 edition, with amendments · International Residential Code: 2018 edition, parts I, II, III and IX, with Idaho amendments; collectively named Idaho Residential Code (2020 Edition) · International Energy Conservation Code: 2018 edition, with amendments; collectively named Idaho Energy Conservation Code (2020 Edition) · International Existing Building Code: 2018 edition

    “Building Codes: 2018 International Building Code, with amendments 2018 International Residential Code (parts I, II, III and IX), with Idaho amendments collectively named the Idaho Residential Code (2020 Edition) 2018 International Energy Conservation Code, with amendments collectively named the Idaho Energy Conservation Code (2020 Edition) 2018 International Existing Building Code”
    3 more reviewed findings on this topic
    • Adopted — Idaho statewide building-code framework, including the codes adopted by the Idaho Building Code Board.
      “The rule adopts the specific editions of the building codes prescribed by Idaho Code, and adopted by the Idaho Building Code Board, along with amendments to such building codes as determined by the Board.”
    • Adopted — Building-code editions and amendments adopted for Idaho under IDAPA 24.39.30.
      “Pursuant to Sections 39-4109 and 39-4109A, Idaho Code, the Board adopts the following international codes with identified amendments:”
    • Adopted — Statewide Idaho building-code adoption framework applicable to local governments, including counties that enforce building codes.
      “The following codes are hereby adopted for the state of Idaho division of building safety”
  • 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”
  • 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”
  • 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.”
    2 more reviewed findings on this topic
    • Required — Drilling wells in Lewis County under Idaho statewide well-construction rules.
      “Prior to drilling a well, the well owner or well driller must first obtain a drilling permit from IDWR.”
    • Required — Drilling a water well in Lewis County.
      “Prior to drilling a well, the well owner or well driller must first obtain a drilling permit from IDWR. All wells must be constructed by a well driller with a valid license 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.”
  • Permit feesPublished (with conditions)

    Building permit, plan-review, and annual-permit inspection fees charged by the Idaho Division of Occupational and Professional Licenses when DOPL is the authority administering the permit or service for a project in Lewis County.

    • The building permit fee is based on total construction valuation, including the total value of all construction work for which a permit is issued.
    • The current building permit table includes $16.45 for valuation from $1 to $500; $16.45 for the first $500 plus $2.14 for each additional $100 through $2,000; $48.48 for the first $2,000 plus $9.80 for each additional $1,000 through $25,000; $274.23 for the first $25,000 plus $7.07 for each additional $1,000 through $50,000; $450.63 for the first $50,000 plus $4.90 for each additional $1,000 through $100,000; $695.63 for the first $100,000 plus $3.92 for each additional $1,000 through $500,000; $2,263.63 for the first $500,000 plus $3.33 for each additional $1,000 through $1,000,000; $3,926.13 for the first $1,000,000 plus $2.56 for each additional $1,000 through $5,000,000; $14,146.13 for the first $5,000,000 plus $1.93 for each additional $1,000 through $10,000,000; and $23,771.13 for the first $10,000,000 plus $1.40 for each additional $1,000 above $10,000,000.
    • Annual-permit inspections are charged at $100 per inspection, and failure to pay within 60 days may result in cancellation of the annual permit.
    • Plan review fees are charged at $100 per hour, capped at 65% of the calculated building permit fee, with a minimum of 40% of that calculated fee; requests must be accompanied by payment of at least 40% of the calculated building permit fee.
    • The published DOPL page directs applicants to a plan-review fee table and building-fees calculator; it does not establish that Lewis County uses a separate county fee schedule.

    building permit valuation $1-$500: 16.45 USD · building permit valuation $501-$2,000 base: 16.45 USD (plus $2.14 for each additional $100 or fraction thereof) · building permit valuation $2,001-$25,000 base: 48.48 USD (plus $9.80 for each additional $1,000 or fraction thereof) · annual permit inspection: per 100 USD per inspection (failure to pay within 60 days may result in cancellation) · plan review fee: per 100 USD per hour (maximum 65% and minimum 40% of calculated building permit fee)

    “TABLE 1-A - BUILDING PERMIT FEES Total Valuation Fee $1 to $500 = $16.45”
    One more reviewed finding on this topic
    • Published (with conditions) — Building and modular permit fee resources administered by Idaho Division of Occupational and Professional Licenses.
      “Plan Review Fee Table [...] Building Fees Calculator [...] Modular Fee Table [...] Modular Fees Calculator”
  • 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.

  • Certificate of occupancy — Certificates of occupancy for buildings in unincorporated Lewis County.
  • Local zoning — Local zoning rules within Lewis County, including incorporated municipalities.
  • Zoning districts — Published zoning districts in unincorporated Lewis County.
  • Minimum dwelling size — Minimum dwelling size in unincorporated Lewis County.
  • Minimum lot size — Minimum lot size in unincorporated Lewis County.
10 more unanswered
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Tiny homes
  • Off-grid sanitation
  • Agricultural exemption
  • Subdividing land
  • 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.

Living off-grid in Lewis County, Idaho

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

Lewis County scores 70/100 on the Bolthole Index, a strong county profile. Its strengths: a stronger property-autonomy legal backdrop and manageable long-term carry cost. Watch-outs: more administrative friction around building and land use.

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

Lewis County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Public Health - Idaho North Central District. 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 Lewis County, Idaho?

Land in Lewis County runs about $2,819 per acre, based on the latest county data.

What is the water situation in Lewis County?

Lewis County gets about 24.9" of rain a year, with severe drought in roughly 8.6% of years.

How remote is Lewis County?

A typical private-land location has about 5,497 people within 15 miles and 400,493 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

How Lewis compares in Idaho

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