Idaho HB 707 — Administrative Lot Splits (Cities ≥10,000) (ID)
Tracked preemption from the Idaho overlay bundle.
Overview
← All state preemptionsIdaho overlay roll-upIdaho zoning wikiIdaho building codesFederal overlaysGlossaryFederal-conflict: Not flagged
Effective
2026-07-01
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 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)Idaho Development Impact Fee Act (I.C. §67-8201 et seq.)
Primary-source summary
HB 707 — Lot splits (cities ≥10,000)Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
AND
city.population≥10000parcel.has_existing_residential_structure==True
Preempted fields
2 fields on the base district schema are rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
lot_split_administrative_path_required | override | True | Cities ≥10,000 must provide an administrative path for splitting parcels containing existing residential structures |
review_type | waive_discretionary | — | Bypasses full subdivision-platting procedure; underlying zoning compliance still required |
Citation
Authority source
Idaho HB 707 (2026)
§ 2026 Idaho Session Laws — HB 707
Research notes
Procedural preemption — cities retain full authority over underlying density and zoning compliance. Reduces friction on lot-line adjustments for parcels with existing residential structures.