Wyoming §18-5-301 — 35-Acre Subdivision Exemption (WY)
Tracked preemption from the Wyoming overlay bundle.
Overview
← All state preemptionsWyoming overlay roll-upWyoming zoning wikiWyoming building codesFederal overlaysGlossaryFederal-conflict: Not flagged
Effective
1975-04-01
Sunset
—
Authority
state
Scope
state:WY
Other Wyoming preemptions
Wyoming HB 2 / 2026 — Fast Track Permits Act (Residential Permit Shot-Clock)Wyoming §18-5-501 — County-Primacy Siting Authority for Wind and SolarWyoming Sage-Grouse Core Area Strategy (Executive Order)Wyoming §15-1-103(a)(xix) — Manufactured Housing Parity in Single-Family DistrictsWyoming §35-20 — Uniform Standards Code for Factory-Built Residential DwellingsWyoming Industrial Siting Act — State Review of Large Industrial ProjectsWyoming §18-5-201(a) — Agricultural Exemption from County ZoningWyoming Constitution Art. 13 §1 — First-Class City Home Rule (Limited)
Trigger predicate
When this evaluates true for a parcel, the law's preempted fields take precedence over base zoning.
AND
parcel.unincorporated==Trueparcel.lot_size_acres≥35
Preempted fields
1 field on the base district schema is rewritten when the trigger fires.
| Field | Op | Value | Note |
|---|---|---|---|
county_subdivision_review | waive | — | Parcels ≥35 acres are exempt from county subdivision regulation — counties have no enabling-act hook to require plat approval, infrastructure improvements, or subdivision review above the threshold |
Citation
Authority source
W.S. §18-5-301 et seq.
§ §18-5-301 et seq. (County subdivision regulation, 35-acre exemption)
Research notes
Structural driver of Wyoming's large-lot rural sprawl pattern. Best understood as a statutory exemption rather than a preemption per se — counties lack the statutory authority to regulate subdivisions above the threshold. Interacts with the §18-5-201(a) agricultural exemption to produce a regime where much rural land division escapes county zoning oversight entirely.