Idaho Development Impact Fee Act (I.C. §67-8201 et seq.) (ID)
Tracked preemption from the Idaho overlay bundle.
Overview
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Effective
1992-07-01
Sunset
—
Authority
state
Scope
state:ID
Other Idaho preemptions
Idaho SB 1354 — ADU By-Right (Cities ≥10,000)Idaho SB 1352 — Starter-Home Subdivisions (Cities ≥10,000)Idaho HB 707 — Administrative Lot Splits (Cities ≥10,000)Idaho HB 706 — Single-Stair Building Option (City Opt-In)Idaho HB 585 — Permit Inspection Shot-Clock (Statewide)Idaho Dillon's Rule — Inclusionary Zoning Mandates Ultra Vires (Mountain Central v. McCall, 2021)Idaho §67-6539 — Short-Term Rental Preemption (HB 216, 2017; HB 583, 2026)Idaho §67-6509A — Manufactured Housing Parity (extended by HB 800, 2026)
Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
city.impact_fees_enacted == TruePreempted fields
4 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
impact_fee_enabling_basis | override | title_67_chapter_82 | Impact fees may be levied only under §67-8201 et seq. — requires capital-improvement plan, rational-nexus / rough-proportionality, restricted to enumerated capital improvement categories |
impact_fee_capital_improvement_plan_required | override | True | |
impact_fee_rational_nexus_required | override | True | Fee must bear rational nexus + rough proportionality to development impact |
impact_fee_eligible_categories_2025 | override | expanded_per_hb231_2025 | HB 231 (2025) broadened eligible capital-improvement categories; does not touch zoning directly |
Citation
Authority source
Idaho Development Impact Fee Act, I.C. §§67-8201 et seq.; amended by HB 231 (2025)
§ Title 67 Chapter 82
Research notes
Caps cities to statutorily-enumerated impact-fee uses (transportation, parks, public-safety facilities, water/sewer expansion). HB 231 (2025) broadened eligible categories but retains nexus/proportionality constraints. Property-tax constraints from HB 389 (2021) lineage have indirectly increased city reliance on impact fees, raising the stakes of §67-8201 compliance.