ADUs are allowed in GreeleyTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Greeley, CO
Is your property eligible for an ADU?
# of Properties
47,681
Owner-occupied
83%
Zoning districts
37
Avg Home Value
$421,771
Median Lot Size
0.18 acres
Avg Income
$83,921
Residential Types:
47,681 housing units
Residential
100%
Zoning Districts:
123,631 parcels · 37 districts
R-L
53%(65,489)
R-H
10%(12,888)
PUD
10%(12,849)
R-M
7%(8,534)
Other
19%(23,871)
ADU Rules
What can you build in Greeley, CO?
Greeley, 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 accessory dwelling unit (in-home apartment).
- –Maximum size of 60% of the principal dwelling’s living area for an internal accessory dwelling unit (in-home apartment).
Detached ADU Size Limits
- –Detached ADU maximum size: 60% of the principal dwelling's living area
- –Detached ADU maximum size: 1,200 sq ft absolute cap
- –Detached ADU building size: 50% of principal building footprint (detached accessory structure limit)
Max Units
- –Detached single-family: 1 ADU per lot; Duplex/multi-unit (2–4 units in house form): 1 ADU per lot
Owner Occupancy
- –No owner-occupancy requirement
Parking
- –1 space per bedroom; max not stated. Parking must be in garage/driveway or street directly in front; on-street spaces count (0.75 on-boundary; 0.25 off-boundary) within 300 ft; reductions: up to 25% near transit; up to 75% for units ≤30% AMI; further reductions via an alternative access/parking plan.
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.
Weld County