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

Unincorporated Shoshone County requires building permits for most construction, additions, alterations, conversions and improvements; manufactured or mobile homes need a setting permit³. Shoshone County administers the 2018 International Code Compliance Regulations, including snow-load and frost-depth requirements¹. Agricultural buildings qualify for the adopted-code exemption only on property currently classified by the Assessor in agricultural-exemption categories 1, 3, 4 or 5; zoning, floodplain and placement rules still apply¹. Owner-builders must submit a signed contractor-registration exemption declaration instead of a registration number, identifying the applicable statutory exemption; the declaration does not waive building permits⁴. The personal-residential-property exemption has restrictions on building for prompt sale, including a primary-residence occupancy exception of at least 12 months before sale⁴. The county publishes building and planning fee schedules effective March 24, 2026; ask Planning & Zoning for the charge for your application and valuation¹.

Shoshone County Planning & Zoning Administration handles building permits for land outside city boundaries¹. Call (208) 752-8891, email pz@co.shoshone.id.us, or visit 700 Bank Street, Suite 25, Wallace, ID 83873; the county also lists (208) 786-4405 for inspections¹. Mark building perimeters and property lines for the first inspection⁶. Inside Kellogg, the Clerk issues building permits; Wallace administers its own building permits, and Osburn requires city building permits for manufactured homes^7,8,9. Panhandle Health District still issues subsurface sewage permits; Osburn also requires city-council written approval for septic tanks and related facilities². Idaho issues and inspects electrical, plumbing and mechanical permits⁶. We could not confirm a general certificate-of-occupancy rule; ask Planning & Zoning about final approval, because the confirmed stormwater condition concerns major subdivisions^1,10.

Shoshone County zoning applies outside incorporated city boundaries¹. Kellogg, Osburn and Wallace administer their own zoning; Panhandle Health District remains the subsurface sewage permitting authority, with additional city septic approval in Osburn^2,11,12,13. The county has 14 zone districts and 2 overlay districts, with different allowed uses and standards; some uses require a conditional-use permit or variance¹. The county zoning map is not online, so call Planning & Zoning with the parcel number or address for the designation and allowed uses¹. Confirm current lot-area, setback, height and coverage requirements rather than relying on the older permit-package chart^1,6. Parcel splits and adjustments are regulated; minor subdivisions are limited to 9 lots of at least 2 acres, while major subdivisions generally require a public hearing and preliminary-plat recommendation¹.

Panhandle Health District, not Shoshone County Planning & Zoning, issues septic permits for Shoshone County². A permit is required for a new subsurface sewage system or a new system location, and approval considers sewage flow, house and well locations, surface water, groundwater limitations, altered soil, neighboring structures, land use and soil type². Call Environmental Health at (208) 783-0707 or email ehapplications@phd1.idaho.gov². Only about 0.4% of county soils rate free of severe limitations for a conventional drain field, so make the district's site review an early purchase contingency¹⁴. Applications and issued permits are each valid for 1 year². Idaho requires one or more compliance inspections, and the public health district inspects individual-system installations¹⁵. The county's septic guidance separately directs applicants to the State Plumbing Bureau for inspection of covered lines; that guidance does not provide a complete tank-and-drainfield inspection schedule¹⁶.

Shoshone County expressly allows a travel-trailer or campground park in the C-2 district, but that narrow use does not establish permission for long-term RV living on other private land³. County zoning controls allowed uses outside city limits, so give Planning & Zoning the parcel number and proposed occupancy duration before moving an RV onto the site¹. We could not confirm a specific tiny-home occupancy rule; ask Planning & Zoning how a proposed dwelling would be classified¹. A tiny home used as a residence still falls under the county's permit and parcel-specific zoning programs¹. Manufactured homes are an allowed use in all land zoned for single-family residential use, except in historic districts and subject to the county placement standards³. Manufactured homes outside parks must enclose at least 1,000 square feet and comply with county placement standards³. Manufactured-home installation also requires inspection and approval before occupancy¹⁷.

1. Confirm jurisdiction, zoning and allowed uses with County Planning & Zoning for land outside city limits¹.
2. Confirm compliant residential road access; obtain a site-disturbance permit for a new driveway involving earth movement, and ask Public Works whether county-road access needs an approach permit^10,18,19.
3. Have Panhandle Health District evaluate septic feasibility and house, well and drainfield locations before committing to the layout².
4. Obtain an IDWR drilling permit before drilling a well⁵.
5. Obtain floodplain approval before development in the Special Flood Hazard Area²⁰.
6. Submit the completed building application, site plan, 2 sets of plans, checklist, applicable agency approvals and contractor registration or signed exemption declaration; processing waits until the required materials are verified and submitted^4,6.
7. Obtain separate Idaho electrical, plumbing and mechanical permits and arrange county building inspections⁶.

Start with jurisdiction and zoning: county rules apply outside city boundaries, and district standards determine allowed uses, lot area and setbacks^1,6. Treat septic feasibility, slope and access as linked questions because only about 0.4% of soils rate free of severe conventional-drain-field limits and just 9.8% of county land is at a 15% slope or less¹⁴. Check the flood map because development in a special flood hazard area requires a county permit²⁰. Confirm that residential access meets county road or driveway standards; a state-highway connection instead requires an ITD encroachment permit^18,21. The effective property-tax rate is about 0.6%, with a median annual bill near $1,273¹⁴. About 73.9% of Shoshone County is federal land, so confirm boundaries and legal access rather than assuming adjacent public ground provides an entrance¹⁴.