Buying Land in Boundary County, Idaho

A real countywide zoning ordinance, applied outside the two incorporated cities

Boundary County administers its own Zoning and Subdivision Ordinance and a Comprehensive Plan adopted July 21, 2008, through the county's Planning & Zoning Department and an appointed Planning & Zoning Commission that meets monthly. The ordinance and comprehensive plan apply to all land in the county lying outside the incorporated city limits of Bonners Ferry and Moyie Springs -- plus, in some cases, an "area of city impact" negotiated between the county and each city, which can layer additional review onto land just outside those city limits. This is a genuinely administered code with its own zone map, not the minimal-zoning pattern some rural Idaho counties follow, so confirm a specific parcel's zoning district and any area-of-impact status with Planning & Zoning before assuming a use is allowed.

The zoning administrator also has a specific, documented responsibility worth knowing about upfront: when a residential placement permit application comes in, the administrator checks whether the property falls within a FEMA-identified wetland or flood zone before signing off, and a property in a mapped flood zone needs a National Flood Insurance Program elevation certificate as part of that review. That check ties directly into the county's floodplain situation described below.

The Kootenai River valley: a levee-dependent floodplain, not just a flood-zone label

The longest continuous stretch of agricultural land in Boundary County runs along the Kootenai River from north of Bonners Ferry to the Canadian border -- productive ground, with wheat and barley together accounting for a majority of the area's crop output, but ground that sits in a floodplain with real history. FEMA's original floodplain mapping for the county dates to August 1982, and much of the area along the Kootenai River was mapped as unnumbered "A Zones" -- meaning the parcel is within the mapped floodplain, but no base flood elevation was ever calculated for it, which changes the standard elevation-certificate process. The valley flooded repeatedly before modern controls, and today's flood safety is genuinely infrastructure-dependent -- a functioning upstream dam plus a maintained countywide levee system, not naturally low risk. See the dedicated flood-zones page below for the documented flood history, the levee system's 2006 test, and what to check for a specific parcel.

Bordering Canada: two land ports of entry, one of them remote

Boundary County's entire northern boundary is the international border with British Columbia, and the county has two U.S. land ports of entry: Eastport, and the smaller Porthill-Rykerts crossing about 27 miles northwest of Bonners Ferry, which has operated since 1883 and is currently the subject of a GSA-managed facility expansion (a new building roughly three times the size of the current one). Porthill is a limited-service port -- open specific daytime hours, serving personal vehicles, some permitted commercial trucks, and hikers -- rather than a 24-hour crossing.

None of this changes ordinary land ownership or use rights away from the border itself. But for land in the immediate border area -- particularly land near the Porthill crossing or directly abutting the boundary line -- ask the county and, if relevant, U.S. Customs and Border Protection about any documented setback, easement, or enforcement-zone consideration specific to that parcel before assuming it functions like interior county land.