ADUs are allowed in AlmaTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Alma, CO
Is your property eligible for an ADU?
# of Properties
226
Owner-occupied
5%
Zoning districts
2
Avg Home Value
$424,497
Median Lot Size
0.17 acres
Avg Income
$108,062
Residential Types:
226 housing units
Single Family
5%
Other
95%
Zoning Districts:
4 parcels · 2 districts
M
50%(2)
R
50%(2)
ADU Rules
What can you build in Alma, CO?
Alma, 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 850 sq ft
Detached ADU Size Limits
- –Maximum size of 850 sq ft for a detached ADU
- –Detached ADU area limited so the ADU plus the principal building together do not exceed one-third of lot area; if the principal building already meets or exceeds one-third, no detached ADU is allowed; detached ADUs are not allowed on lots under 7,500 sq ft
Max Units
- –Where allowed: 1 ADU per lot (also 1 per principal use building)
- –Commercial (C): 0 (prohibited)
Owner Occupancy
- –Owner-occupancy is not required for ADUs.
Parking
- –1 space per ADU bedroom (ADUs limited to 2 bedrooms); spaces may be in garages/carports and must meet general standards (min 10x20 ft).
Rental Restrictions
- –Short-term rentals (<30 days) prohibited; ADUs may only be owner-occupied or rented as long-term units
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.
Park County