ADUs are allowed in ErieTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Erie, CO
Is your property eligible for an ADU?
# of Properties
21,805
Owner-occupied
82%
Zoning districts
31
Avg Home Value
$419,245
Median Lot Size
0.16 acres
Avg Income
$171,050
Residential Types:
21,805 housing units
Single Family
27%
Other
73%
Zoning Districts:
45,400 parcels · 31 districts
PD
47%(21,494)
LR
35%(15,935)
OTR
3%(1,547)
A
3%(1,495)
Other
11%(4,929)
ADU Rules
What can you build in Erie, CO?
Erie, 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 gross floor area of 800 sq ft for an internal accessory dwelling unit (in-home apartment).
Detached ADU Size Limits
- –Maximum detached accessory dwelling unit (backyard cottage) gross floor area of 800 sq ft.
Max Units
- –Single-family detached: 1 ADU per lot.
- –Duplex: none specified; Multifamily: none specified.
Owner Occupancy
- –Owner occupancy is not required.
Parking
- –0 spaces if ADU is added to an existing SF detached with on-street parking; otherwise 1 space/ADU; off-site parking not allowed; on-street spaces adjacent may count toward minimum if approved by the director; max not stated
Rental Restrictions
- –Short-term rentals prohibited; ADUs may be rented only on a monthly or longer basis; minimum lease term is 1 month.
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