It’s hard to describe the rugged beauty of Wyoming with its gorgeous scenery and natural wonders that make this state what it truly is. If you are a proud resident of Wyoming, it’s likely that you too are searching for ways to keep the Wyoming housing market affordable and practical. That’s why Accessory Dwelling Units, self-contained living units positioned beside or behind the primary dwelling, are a perfect solution. Think tiny home meets permanent in-law suite.
One of Zook Cabins’ specialities is our modern ADUs and our goal is to make the process simple. First things first, we’ll start by outlining all the general information for ADUs, then break down the regulations and rules by county and major municipalities.
Are ADUs Allowed in Wyoming?
Yes, although Wyoming does not have a statewide law specifically regulating accessory dwelling units. Instead, ADU rules are determined by individual cities, towns, and counties through their local zoning ordinances. In many communities, small secondary dwellings are allowed, however, the exact permissions vary widely depending on the local jurisdiction.
What is Considered An ADU in Wyoming?
An accessory dwelling unit in Wyoming is generally defined as a secondary, self-contained living space located on the same property as a primary residence. It typically includes its own kitchen, bathroom, sleeping area, and living space so that it can function as an independent dwelling. ADUs may be attached to the main home, built inside an existing structure such as a basement or garage, or constructed as a separate small building on the property. Local zoning codes usually require the ADU to remain subordinate to the primary residence and share the same parcel.
Can Park Model Tiny Homes Be Used As ADUs?
Possibly. Park model tiny homes are not automatically approved as ADUs in Wyoming, but through a conditional use permit or zoning variance, they are very possible, especially in more rural areas. Park models are classified as recreational vehicles under federal standards, which means they are designed for temporary or seasonal use rather than permanent residential occupancy. Because of this classification, many jurisdictions restrict park models from being used as permanent accessory dwellings. Some communities may allow them under special conditions, but in most cases a permanent structure that meets residential building codes is required for an ADU.
Take a look at the table below to see what Wisconsin, and all the other states that we deliver to, have to say about tiny home regulations.
| AL | IL | MN | NC | TX |
| AZ | IN | MS | ND | UT |
| AR | IA | MO | OH | VT |
| CA | KS | MT | OK | VA |
| CO | KY | NE | OR | WA |
| CT | LA | NV | PA | WV |
| DE | ME | NH | RI | WI |
| FL | MD | NJ | SC | WY |
| GA | MA | NM | SD | |
| ID | MI | NY | TN |
Can Log Cabins Be Used As An ADU?
Yes! The sprawling plains of Wyoming are the perfect location for a log cabin ADU. As long as the cabin meets the size and setback requirements and the zoning district allows accessory dwellings, a small log cabin can function as an ADU on a residential property.
Can Modern Cabins Be Used As An ADU?
Yes! Generally speaking, you can use a modern cabin as an ADU. This is because many of the modern cabin models that we have to offer can be built to meet the sizing requirements for an ADU in Wyoming.
What is the Difference Between a Prefab ADU & a Modular ADU?
A prefab ADU refers broadly to a dwelling that is partially or fully constructed in a factory and then delivered to the building site for installation. Modular ADUs are a specific type of prefabricated home built in sections inside a factory and assembled on a permanent foundation at the property. Modular homes must meet the same building codes as site-built homes in the local jurisdiction. Practically speaking, modular ADUs are treated like traditional homes for permitting and inspection purposes.
What is the Minimum Size for an Accessory Dwelling Unit?
With the lack of a statewide law around ADUs, minimum size requirements for ADUs are tied to local building codes. Many jurisdictions follow residential building standards that require a minimum habitable space, often around 150 to 400 square feet depending on the configuration and local regulations.
Can My ADU be Bigger Than My House?
No, in most Wyoming jurisdictions where ADUs are permitted, the accessory unit must be smaller than the primary dwelling. Local zoning rules typically require the ADU to remain clearly secondary to the main house, meaning it cannot exceed the primary residence in size or prominence. Most areas place limits such as a maximum square footage (800-1,000 square feet) or a percentage of the primary home’s floor area (40-50%) to ensure the accessory unit remains subordinate.
How Close to My House Can I Build An ADU?
Expect a 10 ft rear setback and 5ft side setback. These requirements vary significantly between cities and counties. Some communities allow ADUs directly attached to the home, while others permit detached units within the same lot as long as setback requirements are met. Generally speaking, the requirements follow the standards of other accessory buildings like sheds and garages. If you call your local building department, they should be able to quickly provide specifics for your lot.
Do You Need A Permit For An ADU in Wyoming?
Yes, building an ADU typically requires permits in Wyoming. Most jurisdictions require building permits, zoning approval, and inspections to ensure the structure complies with residential construction standards. The permitting process verifies that the ADU meets zoning restrictions, safety codes, and utility requirements before construction can begin.
Are There Any Incentives or Grants for ADUs in Wyoming?
No, unfortunately, Wyoming does not currently have statewide programs specifically offering incentives or grants for building accessory dwelling units. Some housing programs may support affordable housing development in general, but ADU-specific funding is uncommon. Homeowners interested in building an ADU usually rely on private financing or standard construction loans rather than government subsidies. Contact your local housing or building department to see if they have any suggestions.
What Features are Included in An ADU from Zook Cabins?
ADUs from Zook Cabins are designed as fully functional small homes with essential living features. Each model includes a complete kitchen, bathroom, sleeping space, living area, electrical systems, and plumbing connections. The goal is to provide a comfortable and modern living environment while staying within the realms of “tiny homes.”
Are Zook Cabins’ ADUs Built to Code?
Yes! Zook Cabins constructs each ADU model to meet applicable residential building standards so they can be approved in areas where accessory dwellings are permitted. Each unit is designed to comply with structural, electrical, and safety requirements that local building departments typically require for permanent dwellings. Our teams handles the details and provides clear guidance on your role.
Can an ADU Have Multiple Bedrooms and Bathrooms?
It sure can. An ADU can have more than one bedroom or bathroom if the design fits within the size limits and building code requirements set by the local jurisdiction. Larger ADUs include multiple sleeping areas, a full bathroom, and sometimes an additional half bath. The main limitation is usually the maximum square footage allowed for the ADU. As long as you stay within that, you should be good to go.
Are ADUs A Good Investment?
Yes, ADUs can be a strong investment for many property owners. They can increase property value, provide rental income, and offer flexible living space for family members or guests. In areas with housing shortages or high rental demand, an ADU can create a steady income stream while making better use of an existing property.
However, the financial benefits can depend on your specific area and rental limitations. If your municipality forbids ADUs as rentals, it can limit your investment options. On the other hand, if your goal is to create multi-generational living, then an ADU is a priceless investment.
What Counties in Wyoming Allow ADUs?
Does Albany County, Wyoming Allow ADUs?
It sure does. Albany County does allow ADUs in unincorporated areas, and this is one of the clearer county systems in Wyoming. The county’s zoning resolution includes specific ADU standards and requires a zoning certificate. Detached ADUs are capped at the lesser of 1,200 square feet or 75 percent of the principal dwelling’s total square footage, while attached ADUs cannot exceed 40 percent of the principal dwelling’s total square footage. The county also requires two parking spaces per dwelling unit and requires proof with the zoning certificate application that the ADU standards are met.
For homeowners, the next move is to contact Albany County Planning first, confirm the zoning district, and sort out sewer or septic capacity before spending money on plans.
Does Big Horn County, Wyoming Allow ADUs?
It is hard to say one way or the other. Big Horn County does not have countywide zoning, so there is no broad county ADU ordinance that clearly says yes or no across all unincorporated land.
A homeowner interested in building extra living space should start with the Land Planning Department and ask the staff about the specific lot you are interested in building the ADU on.
Does Campbell County, Wyoming Allow ADUs?
Yup! Campbell County does allow ADUs, and its rules are detailed enough that homeowners can plan with some confidence. One ADU is allowed per lot in the R-L, R-R, R-S, and R-1 districts, and in the A-L district the county allows one ADU per primary dwelling, with multiple ADUs possible only if each primary dwelling meets the 10-acre land-area requirement.
Detached ADUs cannot sit in the front or side yard area of the principal dwelling, and the maximum size is the smaller of 1,100 square feet or 60 percent of the primary dwelling’s living-area footprint. The ADU also cannot be taller than the primary dwelling.
The smart next step is to check the zoning district, confirm whether any HOA or covenants also need to sign off, and then submit the county review before construction drawings are finalized.
Does Carbon County, Wyoming Allow ADUs?
It is possible. Carbon County does appear to allow ADUs in at least some unincorporated zoning districts, but the county’s publicly accessible materials are less transparent than Albany’s or Campbell’s on the exact day-to-day homeowner standards. So the practical takeaway is yes, ADUs are part of the county zoning system, but homeowners should not guess on the details.
The next step is to contact Carbon County Planning and Development directly and ask which zoning districts allow ADUs by right versus conditional us.
Does Converse County, Wyoming Allow ADUs?
It is unknown at this time because Converse County does not currently have countywide zoning, which means there is no general county ADU ordinance for unincorporated areas. So in unincorporated Converse County, an accessory dwelling is not being reviewed under a normal county ADU zoning framework the way it would be in places like Albany or Campbell.
The right next step is to contact Converse County staff with the parcel location and get permitting guidance before assuming a second residential unit is allowed.
Does Crook County, Wyoming Allow ADUs?
Like many other Wyoming counties, Crook County does not have a formal countywide ADU ordinance, so accessory dwellings are generally handled through broader land-use and building requirements rather than a clearly labeled ADU program.
If you are considering building one, the first step is to contact the Crook County planning or permitting office with your parcel number so they can confirm whether the property is in a subdivision with its own restrictions.
Does Fremont County, Wyoming Allow ADUs?
Following the pattern of its county neighbors, Fremont County does not enforce countywide zoning or county-specific building codes, which means there is no ADU ordinance regulating accessory units across unincorporated land. In practice, this means a homeowner can often build an additional dwelling or living space if the property can support it, but approval hinges on septic design and state building standards.
Anyone planning an accessory unit should begin by speaking with the Fremont County Planning Department and confirming septic approval before moving forward with design or construction.
Does Goshen County, Wyoming Allow ADUs?
Goshen County currently has no zoning regulations or building inspection program at the county level, which means there is not a defined ordinance that specifically regulates accessory dwelling units. Because of that, ADUs are neither formally permitted nor prohibited under a county zoning framework.
For homeowners interested in creating an additional living unit, the practical next step is contacting the Goshen County Planning Commission to verify whether the property lies within a platted subdivision or other regulated area. They will guide you from there.
Does Hot Springs County, Wyoming Allow ADUs?
It is very possible. Hot Springs County, Wyoming allows additional residential structures in many rural areas, but the county does not maintain a detailed ADU ordinance. Because the county does not publish strict ADU size limits or parking requirements, the main constraints are infrastructure, setbacks from property lines, and compliance with state building codes. Long-term occupancy is generally acceptable in rural zones.
Anyone planning to add an accessory unit should start by checking with the county planning office to confirm permitting requirements.
Does Johnson County, Wyoming Allow ADUs?
Yes, Johnson County allows additional dwelling structures in some areas but does not have a widely standardized county ADU ordinance that clearly outlines size caps or design standards.
Homeowners interested in building an ADU should begin by confirming their zoning with the Johnson County planning department and verifying that the property can support an additional dwelling unit before submitting building plans.
Does Laramie County, Wyoming Allow ADUs?
It does! Laramie County allows accessory dwelling units in unincorporated areas under the county’s Land Use Regulations, though they must meet several specific conditions. ADUs are permitted only on properties with a single-family dwelling and cannot be placed on lots already containing duplex or multifamily housing. A zoning permit and building permit are required before construction begins, and the unit must comply with county development standards.
Homeowners should start by contacting the Laramie County Planning Department to confirm zoning eligibility and review the ADU standards before preparing building plans.
Does Lincoln County, Wyoming Allow ADUs?
While Lincoln County does not have a highly structured countywide ADU ordinance, additional residential units can be allowed in some zones depending on how they are classified in the county’s zoning system. In many rural or agricultural districts, a second living unit may be reviewed as an accessory structure or second dwelling rather than a formal ADU. Because of this approach, there are usually no consistent countywide size limits published for accessory units.
The best next step for homeowners is to contact Lincoln County Planning and Zoning to verify the property’s zoning district and confirm whether an accessory residential unit can be approved on the parcel.
Does Natrona County, Wyoming Allow ADUs?
Yes, Natrona County does allow accessory dwelling units in some zoning districts, although they are typically regulated through the county’s land use framework rather than a single statewide rule. ADUs must remain secondary to the primary home and must follow zoning requirements regarding setbacks, height limits, and lot coverage restrictions.
Because Natrona County includes both rural areas and the Casper metropolitan area, the specific standards can vary depending on the zoning classification. Homeowners should confirm their zoning and review the county permitting process with the planning department before starting design work.
Does Niobrara County, Wyoming Allow ADUs?
Like other Wyoming counties, Niobrara County does not maintain extensive zoning regulations across the county, so there is no official ADU ordinance governing most unincorporated land. This means an additional dwelling may be possible if it complies with general development requirements and state building standards.
We recommend that you begin by contacting the Niobrara County clerk or planning office to verify what approvals are required for the property.
Does Park County, Wyoming Allow ADUs?
While Park County allows some form of accessory residential structures in some zoning districts, the county’s approach focuses on general zoning and land use standards rather than a single statewide ADU policy.
Because zoning rules vary by district, homeowners should first verify their zoning with Park County Planning and then review any permit requirements before designing an ADU.
Does Platte County, Wyoming Allow ADUs?
Yes! Platte County, Wyoming does allow accessory dwelling units in many situations, although they are often regulated as small residential dwellings rather than under a single ADU-specific ordinance.
Homeowners considering an ADU should begin by confirming their zoning with the Platte County Planning and Zoning office and verifying septic or sewer capacity before submitting plans.
Does Sheridan County, Wyoming Allow ADUs?
Yes, Sheridan County, Wyoming allows ADUs, but they must follow county zoning and permitting requirements. A zoning permit and often a building permit must be obtained before constructing or placing any new residential structure on a property, including an accessory unit.
Long-term rental is typically allowed when the unit meets county zoning rules, but short-term rental activity may require additional licensing depending on the municipality. Homeowners should first contact the Sheridan County Planning Department to confirm their zoning district and review permit requirements before preparing construction plans.
Does Sublette County, Wyoming Allow ADUs?
Yes, Sublette County, Wyoming does allow accessory residential units and small homes, but the county sets a clear minimum size requirement. Residential structures, including small dwellings that function similarly to ADUs, must be at least 400 square feet in living area and must meet local zoning and building permit requirements before construction or placement.
Parking is usually accommodated on the property itself rather than through strict numeric requirements. Anyone interested in creating an accessory living space should start by confirming zoning and permitting requirements with the Sublette County Planning and Zoning Department.
Does Sweetwater County, Wyoming Allow ADUs?
Sweetwater County allows accessory dwelling units or small homes in several zoning districts, but they must follow local zoning and land-use requirements. A zoning permit is required to construct or place a residential structure.
Accessory units must meet general residential building code standards and typically must remain secondary to the primary residence on the parcel. Property owners planning an ADU should contact the Sweetwater County Land Use Department early to confirm zoning and determine what permits and inspections will be required.
Does Teton County, Wyoming Allow ADUs?
Like some of its neighbors, Teton County allows ADUs, but the rules are more structured than in most other Wyoming counties because of housing demand and land values. The county follows the International Residential Code. ADUs must meet zoning requirements for setbacks, height limits, and compatibility with the main home, and a building permit is required before construction begins.
Homeowners interested in building an ADU should begin by meeting with Teton County Planning and Building staff to confirm zoning eligibility and review design standards before starting architectural plans.
Does Uinta County, Wyoming Allow ADUs?
Yes, Uinta County allows ADUs although the county does not maintain a highly detailed ADU ordinance like some urban counties. Development in unincorporated Uinta County is governed through the county’s Land Use Resolution and permitting process.
Because zoning districts control allowed land uses, whether an ADU can be built will depend on the property’s zoning classification and whether the lot can support another residence through utilities and septic capacity. Homeowners interested in building an ADU should begin by contacting the Uinta County Planning and Development office to confirm zoning eligibility and determine which permits are required before designing the unit.
Does Washakie County, Wyoming Allow ADUs?
While Washakie County allows additional residential structures in many rural areas, it does not operate under a detailed ADU ordinance that sets specific size caps or design standards. The county has limited zoning regulations and does not enforce a countywide building code in unincorporated areas;
The main factors determining whether a second dwelling can be approved are septic system capacity, water availability, safe road access, and whether the property is located in a regulated subdivision or zoning district. Because there are few formal ADU guidelines, there are generally no standardized square-foot limits or parking requirements applied specifically to accessory units.
The best next step for a homeowner is to speak directly with the Washakie County planning office and local health department to confirm septic approval and determine what permits or land-use approvals may be required.
Does Weston County, Wyoming Allow ADUs?
Just like other counties, Weston County does not maintain a comprehensive ADU ordinance across its unincorporated areas, and development is largely guided by basic planning regulations.
Homeowners interested in building an ADU should begin by contacting Weston County officials to verify the property’s zoning or subdivision status and confirm whether septic or other infrastructure approvals are needed before proceeding with construction plans.
Accessory Dwelling Unit Requirements by Municipality
Does Casper, Wyoming Allow ADUs?
Yes, Casper allows ADUs in certain residential zoning districts, though the city regulates them through its zoning ordinance rather than a single standalone ADU program. Accessory dwelling units are listed as permitted or conditional uses in some residential zones, and they must remain subordinate to the primary dwelling on the property.
Parking and access are reviewed during the permitting process to ensure the property can accommodate another residential unit. Homeowners interested in adding an ADU should start by confirming the zoning classification of their lot with Casper’s Community Development Department before preparing construction plans.
Does Cheyenne, Wyoming Allow ADUs?
Yes! Cheyenne does allow ADUs and small residential structures in several residential zoning districts, provided they meet the development standards for the zone. ADUs must comply with city zoning requirements including setbacks, lot coverage limits, and building height restrictions.
In addition, the unit must meet applicable residential building codes to ensure safe occupancy. The best first step for homeowners is to contact the Cheyenne Building Department to confirm that their property’s zoning district allows an accessory unit and to review permit requirements.
Does Cody, Wyoming Allow ADUs?
It sure does. Cody, Wyoming permits ADUs but they must comply with the city’s zoning ordinance and adopted building codes. ADUs have a maximum size requirement of 800 square feet or 75% of the primary dwelling space, whichever is smaller. Additional setback and design standards apply.
Because zoning districts determine where accessory dwellings are allowed, homeowners should confirm their property’s zoning classification with the Cody planning office before going through this ADU checklist.
Does Gillette, Wyoming Allow ADUs?
Gillette allows accessory dwelling units and small residential structures provided they meet the city’s zoning and building standards. Accessory units must be placed on permanent foundations or securely installed and connected to required utilities such as water, sewer, gas, and electricity. A building permit is required before constructing or placing any secondary residential structure within the city limits.
The ADU must also comply with local zoning rules governing setbacks, lot coverage, and building height so that it remains smaller than the primary home. For homeowners considering an ADU, the recommended first step is to contact the Gillette planning or building department to confirm the zoning district and review the city’s permitting process.
Does Jackson, Wyoming Allow ADUs?
Yes, with very strict limitations. Jackson technically allows accessory residential units but has some of the most restrictive residential size standards in the state. Local housing regulations and zoning requirements expect residential dwellings to be significantly larger than traditional tiny homes, with minimum residential floor areas around 750 square feet in many situations. Because of this requirement, smaller ADUs are often difficult to permit unless they meet the same minimum dwelling standards as full-size homes.
Any ADU must also comply with zoning setbacks, building height restrictions, and strict design review standards that apply in the resort community. Homeowners interested in adding a secondary unit should start by meeting with the Jackson Planning Department to determine whether their property’s zoning district allows accessory dwellings and what size and design rules apply.
Does Laramie, Wyoming Allow ADUs?
It sure does! Laramie allows ADUs with specific guidelines. The city has adopted the International Building Code and International Residential Code, which include standards for small dwellings and accessory housing units. Because zoning districts control what types of housing are permitted, the first step for homeowners should be confirming with the Laramie Planning Division that their property’s zoning district allows an ADU and reviewing the permitting requirements before starting design work.
Looking for an ADU Builder Serving Wyoming?
It’s time to take the next step, finding a reliable builder to partner with you. This is a crucial part of making your ADU dreams a reality. Zook Cabins has decades of experience in the housing world and we are excited to inform you that we deliver our handcrafted ADUs to Wyoming! When you’re ready to move ahead, simply call to talk to our team or request a free quote. We are here to help you dwell beyond the ordinary.