ADUs are allowed in SuperiorTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Superior, CO
Is your property eligible for an ADU?
# of Properties
4,939
Owner-occupied
70%
Zoning districts
22
Avg Home Value
$145,576
Median Lot Size
0.15 acres
Avg Income
$172,917
Residential Types:
4,939 housing units
Single Family
84%
Apts (4+ units)
1%
Other
15%
Zoning Districts:
5,106 parcels · 22 districts
RCR-PD
68%(3,472)
STC-PD
17%(850)
SM-PD
4%(192)
CM-PD
2%(117)
Other
9%(475)
ADU Rules
What can you build in Superior, CO?
Superior, 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 is the larger of 50% of the principal dwelling’s floor area or 750 sq ft, capped at the principal dwelling’s floor area.
Detached ADU Size Limits
- –Maximum size is the larger of 50% of the principal dwelling’s floor area or 750 sq ft, but never more than the principal dwelling’s floor area.
Max Units
- –1 ADU per single-unit or two-unit (duplex) lot
Owner Occupancy
- –Property owner must reside on the property when applying for ADU.
Parking
- –0 spaces per ADU; off-street parking not required; applies townwide to lots allowing single-unit or two-unit dwellings; if parking is provided, general standards apply.
Rental Restrictions
- –Restricted ADU units: 30-day minimum term, rent caps, no subletting; rent only to qualified residents with continuous occupancy.
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.
Jefferson County