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

Yes. Unincorporated Bannock County generally requires a building permit to construct, enlarge, alter, repair, move or demolish a building or structure, or to change its occupancy classification¹. The county applies the 2018 International Building and Residential Codes along with its other listed construction codes¹. Exempt work includes fences 7 feet high or less, retaining walls 4 feet or less, detached decks under 200 square feet and less than 30 inches above grade, and pools under 5,000 gallons and less than 48 inches deep¹. A development permit may still be required, and a zoning or floodplain development permit may apply even when no building permit does^1,10. In unincorporated Bannock County, applying for or using electrical service in a newly placed or built structure requires a building permit first; Building Code-exempt structures instead need a zoning permit number or, when no zoning permit is required, a waiver number². Idaho exempts qualifying owners who work on their own land and do not intend to sell within 12 months from contractor registration, but the exemption does not waive county permits, zoning approvals or inspections⁶.

Bannock County's Office of Planning & Development Services handles county building permits, development permits, zoning review and inspections¹. A complete building-permit application needs supporting documents and goes through multiple planning and building reviews; the county says the full process can take 2 to 4 weeks depending on workload¹. Applications go through the county's online permitting system and include a signed application, recorded deed, site plan, building plans when required and applicable outside approvals¹. Planning, zoning, development, engineering and building fees follow a schedule approved by the County Commissioners; most fees are due with the application, and fees generally become nonrefundable once processing begins¹¹. Electrical, plumbing and HVAC permits are issued separately through Idaho's state permit program^1,9. Inside city limits, Pocatello, McCammon and Lava Hot Springs administer their own building permits^12,13,14. Septic permitting remains with Southeastern Idaho Public Health, subject to applicable city sewer-connection rules^3,15,16.

Yes. Land, buildings and uses in unincorporated Bannock County must follow the rules for the parcel's county zoning district unless an ordinance exception applies². The ordinance divides the county into zoning districts shown on its official zoning map; the online map may omit recent annexations or rezones². Minimum lot sizes and setbacks vary by district, while subdivision and lot-of-record provisions can affect a parcel². Land division for development is regulated under the Bannock County Subdivision Ordinance¹. Site-plan review must precede building or zoning permits or a certificate of occupancy for listed uses, including residential uses². Planning & Development Services is drafting a replacement Land Use & Development Ordinance, so confirm the current district and parcel standards before buying or designing¹. Pocatello, Chubbuck, McCammon and Lava Hot Springs have their own zoning rules^17,18,19,20. City zoning does not replace Southeastern Idaho Public Health septic permitting³.

Southeastern Idaho Public Health handles local review and permitting for individual subsurface sewage-disposal systems serving Bannock County⁴. Adding bedrooms to a home on an existing septic system also needs written approval from Southeastern Idaho Public Health²¹. A septic application requires a completed and signed form, a scale plot plan, proof of ownership, the fee and an onsite evaluation; the applicant must provide test holes generally 8 to 10 feet deep, depending on soil type⁵. The 2026 application lists a $925 permit fee and a 2-year permit term, with a $40 renewal before expiration for 2 more years⁵. If public or central sewer is reasonably accessible, the district may deny an onsite-system permit and require a sewer connection²². Subdivisions using individual wells or septic systems also go to Southeastern Idaho Public Health for review²³. Only 22.3% of county soils rate free of severe limits for a conventional drain field, so complete the site evaluation before relying on a standard system²⁴. Idaho requires an IDWR drilling permit before drilling a covered well⁸.

In unincorporated Bannock County, the Planning Director may approve an RV with a kitchen and bathroom as a temporary residence only during permanent site-built home construction or rehabilitation after fire or another natural disaster². The applicant needs a building permit for the permanent home and separate building and zoning permits for the temporary unit; placement must wait until the permanent home's foundation or basement walls pass inspection². Temporary-residence permits become void if permanent-home work is suspended or abandoned for 180 days². The RV must be vacated and removed within 12 months of temporary-residence permit issuance; the Planning and Development Council may grant one 1-year extension for delays beyond the applicant's control². The temporary-residence provision covers manufactured houses and RVs, not every type of tiny home². Habitable tiny homes require building permits; ask Planning & Development Services about tiny-home occupancy, minimum dwelling size or private-land camping, which we could not confirm beyond the temporary-residence provision¹.

1. Ask Planning & Development Services to confirm the parcel's zoning district, allowable use, minimum lot size, setbacks and required county permits^2,10.
2. Apply to Southeastern Idaho Public Health for the septic permit and onsite evaluation, or confirm whether reasonably accessible public or central sewer changes the plan^5,22.
3. Obtain applicable sewer, floodplain, Army Corps, canal-company or other outside approvals before completing the county submission^1,10.
4. Submit the completed building-permit application and supporting documents, pay the fees due at application, and allow 2 to 4 weeks for county review depending on workload^1,11.
5. Arrange electrical, plumbing and HVAC permits separately through Idaho's state program^1,9.
6. Obtain an Idaho Transportation Department encroachment permit if the driveway connects to a state highway²⁵.
7. Complete required site-plan, inspection and occupancy steps for the approved use².

Confirm the current zoning district and allowable use with Planning & Development Services because Bannock County is drafting a replacement Land Use & Development Ordinance and its online zoning map may omit recent annexations or rezones^1,2. Confirm that the parcel is a lawful lot before assuming it can be developed because land division for development is regulated¹. Only 22.3% of Bannock County soils rate free of severe limits for a conventional septic drain field, so get an evaluation from Southeastern Idaho Public Health before relying on a standard system²⁴. If the lot needs a well, confirm water availability and the drilling-permit process with the Idaho Department of Water Resources⁸. Determine whether the homesite needs a floodplain development permit even if the work is exempt from a building permit¹⁰. The median property tax bill is about $1,918 a year, with an effective rate near 0.7%²⁴.