Lesson 4 of 9 · about 18 minutes
Conditional Uses, Variances, PUDs and Development Agreements
You'll be able to
- State the approval criteria and condition types for a special or conditional use permit under 67-6512
- Explain what a variance can and cannot change under 67-6516
- Describe planned unit developments and development agreements and how each binds future owners
- Work out the expanded notice radius for tall structures
Zoning draws lines with a ruler. Real land is lumpy. Idaho law gives cities and counties four main tools for fitting the rules to a particular project, and each one changes something different. Mixing them up is the most common error people make when they talk about a local land use case.
| Tool | Statute | What it changes | Core standard |
|---|---|---|---|
| Special or conditional use permit | 67-6512 | Lets a conditionally allowed use go on a specific parcel | Use is conditional in the zone, services can handle it, no conflict with the plan |
| Variance | 67-6516 | Bends size and placement rules for one lot | Undue hardship from site characteristics; no conflict with the public interest |
| Planned unit development | 67-6515 | Approves a master-planned project with its own mix of uses and standards | Whatever the local PUD ordinance sets; often processed like a special use permit |
| Development agreement | 67-6511A | Attaches binding promises to a rezone | The owner's written commitment, recorded, enforced by reversal of the rezone |
Special and conditional use permits
Idaho Code 67-6512 uses the term special use permit and lets ordinances say conditional use permit instead. Most do, and most people say CUP. The statute allows a permit when the use is conditionally permitted in the zone, subject to conditions in the ordinance, subject to the ability of political subdivisions including school districts to serve it, and when it does not conflict with the plan.
Before a permit is granted there must be at least one public hearing where interested persons can be heard. Notice runs in the official newspaper at least 15 days before, gets posted on the property at least a week before, and goes by mail to owners within the land and within 300 feet, plus any wider area the commission finds substantially impacted. Local governments are encouraged to post the notice on their websites. The Water, Land and Agriculture lesson walks through a CUP hearing calendar, so this lesson focuses on what the board can do once it decides to say yes.
Conditions
Section 67-6512(d) lists conditions a board can attach, "including, but not limited to," those:
- Minimizing adverse impact on other development
- Controlling the sequence and timing of development
- Controlling the duration of development
- Assuring that development is maintained properly
- Designating the exact location and nature of development
- Requiring on-site or off-site public facilities or services
- Requiring more restrictive standards than the ordinance generally requires
- Requiring mitigation of effects on service delivery by any political subdivision, including school districts
The board can also require studies of social, economic, fiscal and environmental effects, and of aviation hazards, before granting a permit. Section 67-6512(e) also has rules that trip people up: a special use permit is not a binding precedent for other permits, and it cannot be transferred to another parcel.
Conditions have a constitutional limit. The Idaho Attorney General's Regulatory Takings Act Guidelines (January 2023) explain that a demand for land, an easement or money as a condition of approval needs an "essential nexus and rough proportionality" to the project's impacts. Those words come from the U.S. Supreme Court's Nollan, Dolan and Koontz decisions. A condition requiring a gravel pit to pave the haul road it will wear out fits. A condition requiring the same pit to build a park across town probably does not.
Height and expanded notice
When a special use permit is requested because of height, 67-6512(b) widens the mailing list. For structures over 100 feet, notice goes to owners within at least three times the allowed height. In an unincorporated area, when the peak height is 400 feet or more, the radius is at least one mile, and the notice must state the structure's location and height.
Worked example: tall structure notice
| Project | Rule | Mailed notice radius |
|---|---|---|
| 90-foot grain leg in an agricultural zone | 100 feet or less: standard rule | 300 feet from the parcel boundary |
| 150-foot communications tower | Over 100 feet: at least 3 times height | 3 times 150 = at least 450 feet |
| 450-foot meteorological or turbine structure in the county | 400 feet or more, unincorporated | At least 1 mile, with location and height in the notice |
How much land is a one-mile circle around a tower site? Area equals pi times radius squared: 3.1416 times 1 times 1 = about 3.14 square miles. At 640 acres per square mile, that is 3.14 times 640 = about 2,011 acres. In farm country that might be 20 owners. Near a town it could be hundreds, and the 200-owner alternative in 67-6512(c) may apply.
Telecommunications towers also fall under a separate 2025 statute, Idaho Code 67-6540, which sets deadlines for deciding their siting applications (150 days for a new tower that is not a small wireless facility). Check both.
Variances
A variance changes size and placement, never use. Idaho Code 67-6516 defines it as a modification of bulk and placement requirements: lot size, lot coverage, width, depth, front, side and rear yards, setbacks, parking spaces, building height, and other rules about the size or shape of a structure or where it sits on a lot. The statute says a variance "shall not be considered a right or special privilege." It can be granted only on a showing of undue hardship because of characteristics of the site, and only if it does not conflict with the public interest.
Notice and an opportunity to be heard go to owners of adjoining parcels, and to the local airport manager if the variance could create an aviation hazard. Many local codes add newspaper notice or a wider radius.
Site characteristics are about the land. The owner's wishes do not count. A lot cut into a wedge by a canal easement has a site hardship. An owner who wants a bigger garage than the setbacks allow on an ordinary rectangular lot has a preference. Section 67-6512(f) also lets ordinances grant exceptions or waivers of standards other than use through a special use permit or an administrative process, which is why some counties offer "administrative adjustments" for small setback fixes.
Neighbors who challenge a variance carry a burden of their own. In Hawkins v. Bonneville County (2011), a neighbor objected to variances that let the people next door replace aging homes. The Supreme Court held he had to show actual or potential prejudice to a substantial right, such as reduced land value or interference with his own use, and his concerns about traffic, escaped cattle and fire access fell short.
Planned unit developments
Idaho Code 67-6515 lets a local ordinance define a PUD as an area under single ownership or control with a variety of residential, commercial, industrial and other uses. PUD ordinances can set minimum area, permitted uses, ownership, common open space, utilities, density and site layout. PUDs can be processed like special use permits, with the same notice and hearing. The trade usually runs like this: the developer gets flexibility on lot sizes or mixed uses, and the community gets open space, better design or infrastructure it could not demand lot by lot.
Development agreements
A development agreement turns a rezone into a deal with teeth. Under Idaho Code 67-6511A, a governing board may, by ordinance, require or permit an owner to make a written commitment about the use or development of the parcel as a condition of rezoning. The commitment is recorded with the county recorder and takes effect when the rezone is adopted.
- Who it binds. The owner, each later owner, and anyone else who acquires an interest. An unrecorded commitment binds a later owner only if that person had actual notice.
- Changing it. Only with the board's permission after the full 67-6509 notice and hearing process.
- Breaking it. If the requirements are not met in a reasonable time, or an owner fails to comply, the board can terminate the commitment and reverse the zoning after notice and hearing. The written commitment counts as written consent to rezone back.
- No promise from the board. Allowing commitments does not obligate the board to approve the rezone.
Worked example: a rezone with strings
The invented Hadley family asks Corvane County to rezone 40 acres from agricultural to M-1 light industrial for a cold storage warehouse. The use table allows twenty other things in M-1, including a contractor's yard. Neighbors worry about what the next owner might build.
The board approves with a development agreement limiting the site to cold storage and accessory offices, requiring a 50-foot planted berm on the east side, and barring truck departures between 10 p.m. and 6 a.m. The agreement is recorded. Six years later the Hadleys sell. The buyer is bound by every term. If the buyer opens a contractor's yard instead, the county can hold a hearing, terminate the agreement and return the land to agricultural zoning.
Common mix-ups
- Claim: A variance can let me run a business in a residential zone. What the evidence shows: Variances cover size and placement. Use changes need a rezone, a text amendment or a conditional use permit where the table allows one.
- Claim: Once the county approved a CUP for one gravel pit, it has to approve the next one. What the evidence shows: Section 67-6512(e) says a special use permit is not a binding precedent.
- Claim: A development agreement disappears when the land is sold. What the evidence shows: A recorded commitment binds every subsequent owner until the board modifies or terminates it after a hearing.
Reporting angle
- Compare the conditions proposed in the staff report with the conditions in the signed permit or recorded agreement. Changes happen at the hearing and get missed.
- For an older permit, ask for the county's compliance file. Are the hours, berms and road improvements actually there?
- For variances, ask the board which site characteristic created the hardship. "The owner wants it" is not one.
- Pull the recorded development agreement from the county recorder, not the draft from the agenda packet.
Research angle
- Idaho Code 67-6512: Special use permits, conditions and procedures.
- Idaho Code 67-6516: The variance standard.
- Idaho Code 67-6511A: Development agreements.
- Idaho Code 67-6527: Violations, penalties and enforcement.
- Attorney General Regulatory Takings Guidelines: The state checklist for reviewing conditions.
- Hawkins v. Bonneville County: A decision on a county permit denial.
Check yourself
1. Which of these can a variance change under Idaho Code 67-6516?
A variance modifies bulk and placement requirements such as setbacks, lot size and height. It does not change the allowed use.
2. What must an applicant show to get a variance?
Section 67-6516 says a variance is not a right or special privilege and may be granted only on a showing of undue hardship from site characteristics and no conflict with the public interest.
3. A 450-foot structure needs a special use permit by reason of height in an unincorporated area. What mailed notice does 67-6512 require?
When the peak height in an unincorporated area is 400 feet or more, mailed notice reaches at least one mile and must state the structure's location and height.
4. A development agreement under 67-6511A is unrecorded. Who does it bind?
A commitment binds the owner even unrecorded. It binds a subsequent owner only if that person had actual notice. Recorded commitments bind each subsequent owner.
5. Which statement about a special use permit is true under 67-6512(e)?
The statute says a special use permit is not a binding precedent for other permits and is not transferable from one parcel to another.
6. In Hawkins v. Bonneville County (2011), why did a neighbor's challenge to two variances fail?
The court held the neighbor had to show actual or potential prejudice to a substantial right. Concerns about traffic, cattle and fire access did not meet that bar.
Terms in this lesson
- Special use permit
- The statute's name for permission to put a conditionally allowed use on a parcel after a hearing, usually with conditions. Local codes often call it a conditional use permit or CUP.
- Variance
- A modification of bulk and placement rules such as setbacks, height or lot size, granted for undue hardship caused by the site.
- Planned unit development
- A project under single ownership or control that mixes uses or adjusts standards under a master plan, approved under 67-6515.
- Development agreement
- A recorded written commitment by an owner about how land will be used, required or allowed as a condition of rezoning under 67-6511A.
- Condition of approval
- A requirement attached to a permit, such as hours of operation or a buffer, that the owner must meet to use the permit.
Sources
- Idaho Code 67-6512, Special use permits, conditions, and procedures checked 2026-10
- Idaho Code 67-6516, Variance checked 2026-10
- Idaho Code 67-6515, Planned unit developments checked 2026-10
- Idaho Code 67-6511A, Development agreements checked 2026-10
- Idaho Code 67-6527, Violations, penalties, enforcement checked 2026-10
- Idaho Code 67-6540, Siting of telecommunications facilities and broadband infrastructure checked 2026-10
- Idaho Office of the Attorney General, Idaho Regulatory Takings Act Guidelines (January 2023) checked 2026-10
- Idaho Supreme Court, Hawkins v. Bonneville County Board of Commissioners, 151 Idaho 228 (2011) checked 2026-10