Building permits, zoning and land rules in Nez Perce County, Idaho

Yes. Nez Perce County requires permits for new construction, home remodels and additions, manufactured-home placement, commercial structures, accessory buildings and agricultural buildings¹. Building Services checks applicable work against the 2018 International Building Code¹. Downloadable applications are available, but the county does not publish a complete review timeline or every required submittal on that page¹.

Nez Perce County publishes a residential building-permit fee schedule, but the cited schedule is labeled effective 10-1-2017; ask Building Services to calculate the current charge for the specific project². Electrical, plumbing and HVAC work requires separate trade permits⁹. Every manufactured-home installation must be inspected and approved before occupancy; ask Building Services whether county or state installation administration applies¹⁰.

Nez Perce County Planning and Building - Building Services is the county building department¹. Call 208-799-3197 or visit 1230 Main Street in Lewiston for applications and county requirements¹. Land-use questions go to Planning and Building at 208-799-3089 or chelsem@co.nezperce.id.us¹¹.

Bring the parcel number and a project description. Ask which packet applies, what plans are needed and which inspections will follow because the published process is only partial¹. All land divisions receive at least administrative review under the applicable city or county ordinance, so contact Planning before splitting acreage⁴. For county-road access, Road and Bridge publishes an approach permit; call 208-799-3060 or visit 3215 E. Main Street in Lewiston¹².

Yes. Nez Perce County zoning applies outside city limits, and the county publishes an interactive map of zoning designations^2,4. The Agriculture zone has a 5-acre minimum lot, Rural Residential has a 1-acre minimum, and Single-Family Residential has a one-half-acre minimum⁶. Rural Residential lots must be at least 100 feet wide and R-1 lots at least 83 feet wide⁶.

In both RR and R-1, the road setback is at least 20 feet from the property line or 45 feet from the road centerline, whichever is greater, and the setback from other property lines is at least 5 feet⁶. Buildings in the RR and R-1 districts are capped at 35 feet⁶. Aggregate building coverage is capped at 50 percent in RR and 40 percent in R-1⁶. Confirm the parcel's district before designing².

Idaho DEQ sets the onsite-wastewater rules, and Public Health - Idaho North Central District administers permits, site evaluations and inspections in Nez Perce County³. The district issues permits for all new and repaired septic systems³. Call 208-799-3100 or visit 215 10th Street in Lewiston³.

Only 3.9% of county soils are rated without severe limitations for a conventional drain field, so evaluate septic before siting a house¹³. The health district inspects an installed individual system⁵. When inspection preparation is needed, provide at least 48 hours' notice, excluding weekends and holidays¹⁴. A permit may be denied where public or central treatment is reasonably accessible, but that is not a universal connection mandate¹⁵.

In unincorporated Nez Perce County, a recreational vehicle used for a qualifying family hardship requires a conditional-use permit⁶. Approval lasts 1 year, may be renewed annually while the hardship continues, and requires removal when the hardship ends⁶. That narrow route is not general permission for RV residence; ask Planning and Building about the parcel and proposed duration¹¹.

Manufactured homes are permitted in multiple county districts, while a hardship manufactured home is a conditional use; placement also requires a building permit^1,6. Accessory apartments are permitted outright in the RR district subject to the accessory-apartment section and other code provisions, but that does not establish permission in every district⁶. In a special flood-hazard area, a new tiny home must have its lowest floor and utilities elevated to the flood protection elevation, and that is a flood rule, not a general tiny-home permission¹⁶. We could not confirm a specific tiny-home rule or general minimum dwelling floor area; ask Planning and Building how the proposed unit will be classified¹¹.

1. Confirm the parcel's zoning, allowed use, lot size, setbacks, coverage and height⁴.

1. If dividing land, take the proposal to Planning for the required review⁴.

1. Ask Road and Bridge about county-road access; state-highway access requires an ITD encroachment permit^12,17.

1. Ask IDWR what well approval applies and use a licensed driller⁸.

1. Arrange the health district's septic site evaluation and permit³.

1. Obtain a floodplain development permit before construction or development in a special flood-hazard area¹⁸.

1. Submit the county building application and arrange separate trade permits^1,9.

1. Complete the septic and manufactured-home inspections that apply; the Floodplain Administrator may inspect floodplain work before issuing a Certificate of Compliance^5,10,19.

Confirm zoning before treating acreage as buildable. Published minimum lots range from one-half acre to 5 acres in the cited districts, with parcel-specific setbacks, coverage and height⁶. A proposed land division receives at least administrative review under the applicable city or county ordinance⁴.

Check water, wastewater, flood exposure and legal access. R-1 zones are located where lots have central water service, while other districts and parcels can differ⁶. Difficult soils make early septic evaluation valuable¹³. Construction or development in a special flood-hazard area requires a permit before work begins¹⁸. County-road approach forms come from Road and Bridge; state-highway access requires an ITD permit^12,17.