Administrative overview · FIPS 56011
Crook County permit authority
The first compliance decision is jurisdictional: identify the office with statutory authority over your parcel, then use its filing and inspection sequence to keep the project moving.
Jurisdictional status
State Fallback
This profile identifies a handoff outside the county’s ordinary structural permitting lane.
Required jurisdiction check
Confirm the controlling local or state authority before filing.
The record is marked State Fallback. That means the county profile should be treated as a routing brief: incorporated municipalities, a state building department, or a state fire marshal may control plan review, permits, and inspections. Contact the named agency below and verify the parcel’s jurisdiction before paying a fee or scheduling field work.
Responsible agency
Wyoming Department of Fire Prevention and Electrical Safety (State Fire Marshal)
For a project in or near Crook County, this office is the identified point of contact for permit intake, statutory code enforcement, plan review coordination, and inspection release conditions. Confirm the parcel’s boundary and project type before relying on the county lane.
Direct contact
307-777-7288
Call before mobilizing if the project has a boundary, occupancy, fire, septic, or utility question.
Permit counter
Wyoming Department of Fire Prevention and Electrical Safety, 320 West 25th Street, 3rd Floor, Cheyenne, WY 82002; Crook County Growth and Development, 309 East Cleveland Street, Sundance, WY 82729
Operating hours
State office hours N/A; Crook County Growth and Development Monday-Friday, 8:00 AM-5:00 PM Mountain
Review expectation
The State Fire Marshal accepts or rejects a plan-review submittal for review within five business days and completes a complete accepted review within 21 business days; when additional information is required, review finishes within 10 business days after receipt or the original 21-day period, whichever is later.
Compliance workbench
Choose the next project decision.
Apply online
Open the verified digital gateway, application form, and review timeline.
Open guide →Fees & penalties
Understand fee schedules, enforcement exposure, and stop-work liabilities.
Open guide →Codes & exemptions
Read the code framework, minor-work exemptions, and inspection lane.
Open guide →Agency website
Visit the primary public source for current notices and contact changes.
Open guide →Source trail
Official sources for this profile
Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.
Project questions
Frequently asked questions for Crook County
Who handles permitting for this jurisdiction?
This record is marked State Fallback. Confirm whether a city, state agency, or other local authority controls the parcel before filing.
How should I begin an application?
Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact 307-777-7288.
How long might review take?
The State Fire Marshal accepts or rejects a plan-review submittal for review within five business days and completes a complete accepted review within 21 business days; when additional information is required, review finishes within 10 business days after receipt or the original 21-day period, whichever is later.
How are inspections scheduled?
Crook County performs no building-construction inspection and issues no Certificate of Occupancy. For a guaranteed state electrical inspection in Crook County, obtain the wiring permit through the state portal and contact State Electrical Inspector Matt Mullen at 307-752-0348. State fire/life-safety plan-review projects receive construction inspections and must pass before a Certificate of Occupancy or Letter of Compliance. County small-wastewater systems must be inspected before backfilling; contact Growth and Development at 307-283-4548.
Which codes and exemptions should I review?
Crook County's official notice states that it has no land-use regulations, zoning regulations, adopted building codes or building-permit requirements and performs no residential, commercial or industrial construction inspections. For projects within Wyoming State Fire Marshal jurisdiction, the state enforces the 2024 International Fire, Building, Fuel Gas, Mechanical and Existing Building Codes and, effective July 1, 2026, the 2026 National Electrical Code. Crook County separately administers small-wastewater, subdivision, floodplain, rural-addressing and wind-energy requirements when applicable. N/A for a county building permit because Crook County requires none. State Fire Marshal plan review is limited to defined public and life-safety projects, including government buildings, schools, public-access buildings over 5,000 square feet, larger child-care facilities, multistory and assembly buildings, qualifying remodels and occupancy changes, fire-protection systems, alternative energy, aboveground fuel tanks, commercial kitchen hoods, spray-finishing work and RV/camping/mobile-home park site plans. Other private work may still require an electrical wiring permit or separate County septic, floodplain, subdivision or wind-energy approval.