ADUs are allowed in WellingtonTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Wellington, CO
Is your property eligible for an ADU?
# of Properties
4,635
Owner-occupied
79%
Zoning districts
17
Median Lot Size
0.17 acres
Avg Income
$110,294
Residential Types:
4,635 housing units
Other
100%
Zoning Districts:
5,700 parcels · 17 districts
R-2
68%(3,887)
R-4
8%(458)
R-3
7%(422)
O
4%(227)
Other
12%(706)
ADU Rules
What can you build in Wellington, CO?
Wellington, CO 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
Interior / Attached ADU Size Limits
- –Maximum size of 1,200 sq ft
- –Maximum size of 100% of the principal dwelling’s interior habitable area
Detached ADU Size Limits
- –Maximum ADU size of 1,200 sq ft
- –Maximum ADU size equal to 100% of the principal dwelling’s interior habitable area
Max Units
- –Single-family detached: 1 ADU/lot; on lots ≥0.5 ac: up to 2 (1 detached + 1 internal/attached).
- –Single-family attached (only when 1 attached dwelling on lot): 1 ADU/lot; on lots ≥0.5 ac: up to 2 (1 detached + 1 internal/attached).
Owner Occupancy
- –No owner-occupancy requirement
Parking
- –0 spaces/ADU; max not specified; on-street parking credit allowed (1 space can count; credits for on-street spaces within 500 ft may be granted by Director).
ADU State Law
What can you build in Colorado?
- –ADUs must be approved based on objective standards; no discretionary hearings allowed.
- –Historic properties: Local historic review may still apply in designated historic districts.
- –Exempt parcels: ADUs are not required to be allowed on parcels without adequate water/sewer, in floodways, or on certain historic properties.
- –HOAs cannot prohibit ADUs: HOA rules that conflict with the state ADU law are void.
- –Parking exceptions exist: In rare cases, one parking space may be required if there is no existing off-street parking and on-street parking is prohibited.
- –Local rules still matter: Building code, fire code, utility capacity, and life-safety standards still apply.
- –More permissive is allowed: Municipalities may allow larger ADUs, multiple ADUs, or additional housing types beyond what the state requires.
- –Local zoning controls whether ADUs are allowed at all.
- –HOA rules may still apply.
- –More permissive local rules are allowed.
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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ADU rules in other Colorado municipalities
Rules change at the town line. Check the municipality your property is actually in.
Larimer County