

ADU rules for Newcastle
Accessory Dwelling Unit (ADU) Rules for Newcastle, WY
Is your property eligible for an ADU?
# of Properties
1,329
Owner-occupied
66%
Median Lot Size
0.20 acres
Avg Income
$89,226
Residential Types:
1,329 housing units
Residential
100%
ADU Rules
What can you build in Newcastle, WY?
Newcastle, WY follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not addressed in the local bylaw
- –Detached ADU: Not addressed in the local bylaw
Max Units
- –R-S, R-1, R-2, R-3: 0 per lot.
- –M-H: Up to 1 accessory single-family dwelling for the owner/manager of a mobile home park; otherwise accessory occupancy not allowed.
- –Commercial districts: at most 1 ADU per permitted use for owners/employees; otherwise prohibited.
Owner Occupancy
- –Occupied by owner or employees and their families in A District
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.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs