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

Yes. Unincorporated Bingham County requires a permit for any occupied structure, regardless of size, as well as additions, decks or porches, structural repairs or remodels, changes of use, manufactured-home placement, and other listed work¹. An accessory structure needs a permit when it exceeds 200 square feet, or 120 square feet for a commercial accessory structure¹. Bingham County has adopted the 2018 family of building, residential, energy, mechanical, fuel-gas, and existing-building codes with county and state amendments⁸. Electric service may not be used in a structure until the required building, zoning, or waiver permit has been secured⁸. Idaho separately requires permits for regulated electrical, plumbing, and HVAC work⁹.

Inside Blackfoot, the city handles building permits¹⁰. Inside Aberdeen, the city handles building permits under its own requirements and exemptions¹¹. Southeastern Idaho Public Health remains the septic permitting authority for Bingham County⁴.

Bingham County Planning and Development handles building and construction, code enforcement, land development, and planning and zoning¹². Reach the department at 208-782-3177 or visit 490 N Maple, Suite A, Blackfoot, ID 83221¹². Select the pertinent application, create a portal account, attach the required documents, and submit for staff review; after approval, pay for and print the permit, then request inspections through the same portal⁴. Commercial plans need Fire Marshal approval before they are submitted to the county⁴. After the final inspection passes, Bingham County issues a Certificate of Occupancy or Certificate of Completion when one applies to the project¹³. Bingham County’s current building and zoning fees took effect March 6, 2026; accessory structures require a non-refundable $100 deposit credited to an approved permit, and commercial plan review adds a non-refundable 25% of the permit fee¹⁴.

Yes. Bingham County zoning applies across unincorporated land, except portions of tribal land inside the Fort Hall Indian Reservation where the county lacks jurisdiction². Uses and dimensional standards vary by zoning district, and some uses require conditional-use approval². Blackfoot sets its own zoning inside city limits¹⁵. Aberdeen also has its own city zoning, while Southeastern Idaho Public Health handles septic permits there^16,17. For residences, the general side setback is 5 feet and the rear setback is 20 feet, while road and waterway setbacks vary with the feature². Outside a platted subdivision, an approved residential parcel using division rights must contain at least 1 acre; subdivision minimums vary by zone and water and sewer service². We could not confirm a countywide minimum dwelling size, lot-coverage limit, or general building-height limit; ask Planning and Development about those parcel-specific standards¹².

Southeastern Idaho Public Health provides septic permitting and inspection services for Bingham County, and its local county office is at 145 W Idaho Street in Blackfoot^4,18. A complete application needs the fee, a deed or tax notice, and a signed, dated plot plan drawn to scale³. Every application requires an onsite evaluation, and the owner or applicant must provide test holes 8 to 10 feet deep depending on soil type³. The application page lists $300 for a speculative site evaluation and $925 for a site evaluation plus permit when the site is suitable; fees are subject to change³. About 32.3% of Bingham County soils are rated “not limited” for a conventional drain field; a parcel evaluation is still needed, and a poorer rating does not mean septic is impossible¹⁹. Public or central sewer availability can also lead the director to deny an onsite permit²⁰.

Bingham County treats a travel trailer or motor home as temporary housing, not a primary long-term residence². An RV park is a separate conditional use subject to county and health approvals, so buying acreage does not create a path to use an RV as a permanent dwelling². A tiny home intended for occupancy is not exempt merely because it is small: Bingham County requires a building permit for any occupied structure¹. We could not confirm a special tiny-home occupancy path, a countywide minimum dwelling size, or a complete rule for off-grid sanitation; ask Planning and Development about the dwelling and Southeastern Idaho Public Health about wastewater^3,12. A HUD-certified manufactured home requires an installation permit before placement and must meet county rules for modifications, additions, and alterations⁸.

1. Ask Bingham County Planning and Development to confirm jurisdiction, zoning district, allowed use, lot size, setbacks, and any conditional-use review^2,12. In unincorporated Bingham County’s special flood-hazard areas, obtain a floodplain development permit before construction, manufactured-home placement, fill, or other development begins²¹.

1. Confirm legal access. Work on a driveway in county public-road right-of-way needs written Public Works authorization before it begins²².

1. Establish water and wastewater feasibility. IDWR requires a drilling permit and a licensed driller for a well⁷. Apply to Southeastern Idaho Public Health with the deed or tax notice, scaled plot plan, fee, and test holes³.

1. Select the county application, create a portal account, attach the required plans and approvals, and submit for staff review; commercial plans need Fire Marshal approval before submission⁴. After county approval, pay for and print the building permit²³.

1. Obtain separate Idaho permits for regulated electrical, plumbing, and HVAC work⁹.

1. Request inspections through the county portal and pass the final inspection; the county issues an occupancy or completion certificate when applicable^4,13.

Start with jurisdiction and zoning: county districts govern unincorporated land but exclude tribal land where Bingham County lacks authority, while municipalities and city-impact areas may use different rules². Confirm the parcel meets the applicable lot-size and setback rules². Test wastewater feasibility before purchase; the required onsite evaluation depends on the parcel’s soils³. IDWR requires a permit before drilling a well⁷. Confirm which agency controls the road frontage: a county-road approach needs Public Works authorization, while a driveway onto state highway right-of-way needs an Idaho Transportation Department encroachment permit^22,24. For land in a special flood-hazard area, ask Planning and Development about the floodplain development application: scaled plans, elevations, drainage details, and watercourse changes may be required^12,21.