ADUs are allowed in Black HawkTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Black Hawk, CO
Is your property eligible for an ADU?
# of Properties
55
Owner-occupied
4%
Zoning districts
21
Avg Home Value
$412,792
Median Lot Size
0.16 acres
Avg Income
$86,147
Residential Types:
55 housing units
RES IMPS
100%
Zoning Districts:
1,035 parcels · 21 districts
ECP
18%(185)
RS
16%(168)
CBS
16%(167)
HARD
13%(135)
Other
37%(380)
ADU Rules
What can you build in Black Hawk, CO?
Black Hawk, 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
Parking
- –1.5 spaces/ADU for studio/1BR; 2 spaces/ADU for 2+BR; tandem parking allowed in residential districts for ≤4 units; Historic Residential District parking limited to the resident's vehicle.
Rental Restrictions
- –In Commercial/Business Services or Gaming districts, secondary ADUs are considered permanent uses and may not be used for short-term rentals; hotels, motels, lodging houses, boarding houses, dormitories, or bed and breakfasts are prohibited.
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.
Gilpin County