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 accessory dwelling unit.
Detached ADU Size Limits
- –Maximum ADU size must be smaller than the primary residence's gross building area.
- –On parcels 6,500 sq ft or larger, any one building (including a detached ADU) may not exceed 5,000 sq ft unless a land use change permit is approved.
- –On parcels 6,500 sq ft or larger, total building area of all structures may not exceed 7,000 sq ft; the ADU is limited to the remaining allowance.
- –On wilderness inholdings, any one structure (including a detached ADU) is limited to 800 sq ft.
- –On wilderness inholdings, the aggregate size of all structures may not exceed 1,200 sq ft; the ADU is limited to the remaining allowance.
- –Above timberline, the aggregate size of all structures may not exceed 1,000 sq ft; the ADU is limited to the remaining allowance.
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.
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
Is your property eligible for an ADU?
ADU rules in other Colorado municipalities
Rules change at the town line. Check the municipality your property is actually in.
Gunnison County