ADUs are allowed in CasperTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Casper, WY
Is your property eligible for an ADU?
# of Parcels
24,926
Zoning districts
19
Avg Parcel Value
$339,238
Median Parcel Size
0.18 acres
Zoning Districts:
24,787 parcels · 19 districts
R-2
51%(12,519)
R-1
15%(3,661)
R-4
8%(1,965)
R-3
7%(1,807)
Other
20%(4,835)
ADU Rules
What can you build in Casper, WY?
Casper, WY follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Detached ADU Size Limits
- –Maximum size of 1,500 sq ft for a detached accessory building (applies to a detached ADU/backyard cottage).
- –Maximum size of 15% of lot area for a detached accessory building (applies to a detached ADU/backyard cottage).
Owner Occupancy
- –Owner or immediate family must occupy either the principal or ADU
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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Learn the key rules and size limits for ADUs
Is your property eligible for an ADU?
ADU rules in other Wyoming municipalities
Rules change at the town line. Check the municipality your property is actually in.
Natrona County