Shed Permit Requirements in Wyoming

The Least Regulated State in the West

Wyoming takes a hands-off approach to building regulation that's extreme even by western standards. The state has no mandatory statewide building code for residential construction, no statewide zoning regulations, and no state-level general contractor licensing requirement. All building regulation happens at the local level — and many areas of the state have no building regulation at all.

For shed builders, this means permit requirements depend entirely on where you are. In Cheyenne, you follow the city's adopted building code. In the open rangeland of central Wyoming, you might build a barn without ever talking to a government official. The contrast can be stark even within a single county — Laramie County recently raised its unincorporated-area exemption to 400 square feet, while the City of Cheyenne within the same county holds the line at 200.

Before planning your shed, determine whether your property falls within a city that enforces building codes, within a county that has code enforcement in unincorporated areas, or outside any building code jurisdiction entirely. For a broader perspective on how shed permits work nationally, see our national guide to shed permits.

How Five Wyoming Cities Handle Shed Permits

Cheyenne: 200 Square Feet in the City, 400 in the County

Cheyenne — the state capital and largest city — enforces building codes within city limits with a 200-square-foot threshold for shed permits. One-story detached accessory structures under 200 square feet used for storage and similar purposes don't need a building permit, but they must comply with zoning setback requirements.

Outside Cheyenne's city limits but within Laramie County, the rules recently got more generous. In December 2025, the county commissioners unanimously approved raising the permit exemption from 200 to 400 square feet for one-story detached accessory structures. The change was explicitly intended to exempt shipping containers, Conex boxes, small carports, and larger sheds from the building permit process. The county's building official noted that this deregulation removes the county's ability to enforce setbacks through the permit process — so it's on the homeowner to ensure the structure doesn't encroach on property lines or easements.

Cheyenne's permit fees start at approximately $13 for very small projects (under $500 valuation) and scale up from there. Electrical permits are administered separately by the state through the Department of Fire Prevention and Electrical Safety.

Casper: 120 Square Feet with a Free Shed Permit

Casper uses a 120-square-foot threshold — stricter than most Wyoming cities. One-story unheated detached accessory buildings under 120 square feet (measured at the maximum exterior wall dimension) are exempt from a building permit, but the city still requires a free fence/shed permit for these structures.

The free permit ensures the city's building department is aware of the structure and can verify that it meets setback requirements and isn't placed on an easement. For sheds over 120 square feet, a full building permit is required with construction plans, a site plan, and inspections.

Casper's building guides staff can assist homeowners with the design and code requirements for most residential projects. Small residential accessory structures can often be reviewed and permitted while you wait at the city's building department counter. More complex projects require a plan review period of 1 to 2 weeks.

Laramie: 200 Square Feet, No Front Yard

The City of Laramie — home to the University of Wyoming — exempts one-story detached accessory buildings under 200 square feet from a building permit, provided they meet all required setbacks. Fences up to 7 feet in the back and side yard are also exempt.

Laramie's Code Administration Department emphasizes that even exempt projects may have other requirements. The city recommends contacting the department before starting any project to confirm that zoning, setback, and easement rules are met.

Laramie's elevation (7,165 feet) creates significant snow load and frost depth requirements for larger sheds. The city's building code applies cold-climate provisions, and post-frame construction is common for accessory buildings in the area.

Rock Springs: All Sheds Need a Permit

Rock Springs takes the strictest approach among the cities covered here. The city requires a permit for all sheds, regardless of size. The permitting process requires a site plan drawn to scale, showing the shed's location relative to property lines, easements, and existing structures.

Rock Springs adds specific restrictions: sheds cannot be taller than the house without a conditional use permit, cannot be used as a dwelling unit, and cannot be located in any recorded easement. The city also caps the total combined square footage of all accessory buildings at 1,500 square feet. If your combined accessory buildings would exceed that, you need a conditional use permit before the building permit can be issued.

Jackson: Teton County's Unique Approach

Jackson and Teton County exempt accessory structures under 200 square feet (one-story, non-habitable) from a building permit. But the county adds an important distinction: even when a building permit isn't needed, a planning review may be required to ensure compliance with setbacks, maximum floor area, and maximum site development standards.

Teton County's development regulations are among the most detailed in Wyoming, reflecting Jackson Hole's unique character as a resort community bordered by Grand Teton National Park and the National Elk Refuge. Lot coverage limits, building height restrictions, and view corridor protections all affect where and how you can build an accessory structure. Permit fees in Jackson tend to be higher than elsewhere in Wyoming, reflecting the area's high property values and development costs.

Teton County also exempts agricultural buildings under 600 square feet that are only two-sided or less (essentially open-sided shelters for equipment or livestock) from building permits.

Wind: Wyoming's Defining Construction Factor

Wyoming is among the windiest states in the nation, and the wind shapes everything about shed construction here. The state's open terrain, high elevation, and exposure to powerful Pacific fronts create conditions where sustained winds of 30 to 40 mph are routine, and gusts can exceed 80 mph during storms.

The Interstate 80 corridor between Cheyenne and Rock Springs is particularly wind-prone — the highway regularly closes during winter due to high winds. Casper, situated in the center of the state, also experiences severe wind events. Even the sheltered valleys of Teton County and the Big Horn Basin see powerful winds during chinook events.

For sheds, the implication is clear: anchoring is not optional in Wyoming, permit or not. Common anchoring methods include:

• Post-frame construction with posts set below frost depth (typically 36 to 48 inches)
• Concrete slab with anchor bolts or straps
• Auger-style ground anchors rated for high wind loads
• Concrete piers with structural connections to the shed frame

An unsecured shed in a Wyoming windstorm doesn't just damage your property — it can become an airborne hazard to neighboring homes, vehicles, and people. The modest cost of proper anchoring is one of the best investments you can make.

Frost Depth and Foundations

Wyoming's frost depth varies by elevation and location:

• Eastern plains (Cheyenne): approximately 36 inches
• Central basins (Casper, Riverton): approximately 36 to 42 inches
• Mountain valleys (Jackson, Laramie): approximately 42 to 48 inches or more

For small sheds under the local permit threshold, frost-depth footings are not required by code. A gravel pad, concrete blocks, or treated timber skids are acceptable. For larger sheds that require a permit, foundations must extend below the frost line. Post-frame construction is the dominant approach for accessory buildings across Wyoming — it handles frost depth efficiently, performs well in high wind, and suits the state's rural construction traditions.

The Rural Reality

Outside Wyoming's cities and the few counties with building code enforcement, the regulatory landscape is sparse. Many of the state's 23 counties have no building department and no building permit requirements in unincorporated areas. You could build a large workshop or garage without any government review.

However, several practical considerations still apply:

• County zoning may regulate setbacks, lot coverage, and permitted land uses even without a building code
• Electrical work requires a state electrical permit through the Wyoming Department of Fire Prevention and Electrical Safety, regardless of local building code status
• Septic and water well permits are regulated by the Wyoming Department of Environmental Quality
• Property taxes — your county assessor will add any new structure to the tax rolls
• Insurance — your homeowner's insurance company may require code-compliant construction regardless of local enforcement

HOA Restrictions

Wyoming's Homeowners Association (HOA) presence is growing, particularly in the newer developments around Cheyenne, Casper, Gillette, and the Jackson Hole area. Resort and recreation communities in Teton County, Sheridan County, and the Big Horn Basin often have strict covenants governing accessory structures.

Common HOA restrictions include limits on shed size and height, requirements to match the home's materials and colors, and prohibitions on metal or shipping container structures. Check your deed restrictions before purchasing or building a shed — the city won't enforce HOA rules, but your association can.

Consequences of Skipping the Permit

In cities with code enforcement, building without a required permit carries standard risks:

• Increased fees — most cities charge a penalty for retroactive permits
• Stop-work orders and potential removal of non-compliant structures
• Sale complications — title searches and home inspections reveal unpermitted structures

In unincorporated areas without building code enforcement, the practical consequences are minimal from a permitting standpoint, but building to code remains smart practice for structural integrity, insurance coverage, and resale value.

Permit fees for sheds in Wyoming are modest — typically $50 to $150 in most cities. Casper even offers a free shed permit for structures under 120 square feet. The cost of permitting is trivial compared to the cost of moving a shed that encroaches on a setback.

If you're also planning a garage or carport alongside your shed, coordinate with your city about total lot coverage and combined accessory building area. Rock Springs caps total accessory area at 1,500 square feet, and other cities have similar limits.

For an overview of all building permit requirements in Wyoming — including decks, fences, pools, and more — see our complete Wyoming building permit guide.