LLUPA’s “Affected Person” Standard May Lower Bar for Idaho Land Use Challenges

In January 2026, the Idaho Supreme Court issued an opinion in Crookham v. County of Canyon, No. 52514 (Idaho Jan. 16, 2026), which will have ramifications for local governments statewide. Chiefly, the previous three-part “standing” barrier to entry for a litigant bringing a challenge to a land use decision has been lifted in favor of the statutorily prescribed “affected person test,” which is yet to be hammered out in court cases. The Court found this outcome already implicit in its own precedent: both Citizens Against Linscott/Interstate Asphalt Plant v. Bonner County Board of Commissioners, 168 Idaho 705, 486 P.3d 515 (2021), and Evans v. Teton County, 139 Idaho 71, 73 P.3d 84 (2003), had already decided standing under the affected person test despite nodding to the previous three-part test, and the Court expressly overruled the one line in Evans suggesting otherwise. The previous standard for these cases stemmed from federal constitutional standards, namely the three-part test from Lujan v. Defenders of Wildlife, 504 U.S. 555, 560–61 (1992), verifying the applicant had injury in fact, traceability, and redressability. Injury in fact required a concrete and particularized harm, not one that was generalized, hypothetical, or speculative. Traceability required that the harm be fairly attributable to the specific government action being challenged, rather than a broader trend or general economic condition. And redressability required that a favorable court decision actually be capable of fixing the alleged injury, not merely sending the matter back for a decision that might not resolve the underlying objection. The new standard will be the affected person test, which is defined in Idaho Code § 67-6521(1)(a) as “…an affected person shall mean one having a bona fide interest in real property which may be adversely affected by:

(i) The approval, denial or failure to act upon an application for a subdivision, variance, special use permit and such other similar applications required or authorized pursuant to this chapter;

(ii) The approval of an ordinance first establishing a zoning district upon annexation or the approval or denial of an application to change the zoning district applicable to specific parcels or sites pursuant to section 67-6511, Idaho Code; or

(iii) An approval or denial of an application for conditional rezoning pursuant to section 67-6511A, Idaho Code.

The key phrase, which stands out in this definition, is “adversely affected by,” which will likely be the source of a myriad of fact-based determinations in courtrooms intended to define the exact means and bounds of such an amorphous phrase. While the case at hand was from a pro-agrarian perspective, it is easy to imagine the inverse taking place following this ruling.

What This Ruling Means for County Officials:

For county commissioners, planning and zoning staff, and county attorneys, this ruling lowers the bar for who can bring a challenge to a land use decision. The Legislature’s affected person standard, not the stricter three-part test, now controls whether a petitioner can seek judicial review of a county’s zoning, subdivision, variance, or conditional rezoning decisions, so counties should expect more petitioners to clear the standing hurdle than before. A person no longer needs to show an existing business relationship with the property or a demonstrated economic loss, just a bona fide interest in real property that may be adversely affected.

While the “affected person” standard is broad, it is not toothless; it still demands a showing of a genuine, legitimate property interest impacted by a land use decision rather than a speculative or generalized concern. Because a district court will now have to make findings on whether a petitioner qualifies as an affected person, counties should document who participates in a hearing and what property interest they claim while the record is being built, not after the fact. Doing so now, while the meaning of “adversely affected” is still being hammered out in the courts, will make it easier for a reviewing court to resolve standing on the existing record instead of sending the matter back for more fact finding. Good documentation at the county level is essential to ensure that counties do not inadvertently create an administrative record that makes a petitioner’s standing claim for them, maintaining that the burden remains firmly on the opponent to establish standing.