ADUs are allowed in Unincorporated GunnisonTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Gunnison, CO
Is your property eligible for an ADU?
# of Properties
9,877
Owner-occupied
14%
Zoning districts
7
Avg Home Value
$572,756
Median Lot Size
1.51 acres
Avg Income
$106,514
Residential Types:
9,877 housing units
Residential
100%
Zoning Districts:
13,381 parcels · 7 districts
NZ
100%(13,322)
R
0%(27)
C
0%(25)
I
0%(2)
Other
0%(5)
ADU Rules
What can you build in Unincorporated Gunnison, CO?
Unincorporated Gunnison, 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 for an internal or attached ADU
Detached ADU Size Limits
- –Maximum size of 5,000 sq ft per building on parcels 6,500 sq ft or larger.
- –Must be smaller than the primary residence.
- –On parcels smaller than 6,500 sq ft, maximum ADU size cannot exceed 45% of lot area (due to parcel-wide aggregate cap).
Parking
- –Min 2 spaces/ADU (2 for 1–3 beds; +1 per bed over 3); applies to both primary and secondary residences; spaces may be garage/carport/parking area; Essential Housing may reduce spaces; no max specified
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.
Gunnison County