ADUs are allowed in Unincorporated PitkinTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Pitkin, CO
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# of Properties
4,547
Owner-occupied
32%
Zoning districts
32
Avg Home Value
$5,772,664
Median Lot Size
1.33 acres
Avg Income
$128,641
Residential Types:
4,547 housing units
Single Family
73%
2-3 Family
1%
Apts (4+ units)
1%
Other
24%
Zoning Districts:
7,804 parcels · 32 districts
AR-10
24%(1,863)
RS-30
18%(1,396)
RR
9%(718)
R-30
8%(598)
Other
41%(3,229)
ADU Rules
What can you build in Unincorporated Pitkin, CO?
Unincorporated Pitkin, 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 1,000 sq ft per caretaker dwelling unit in Conservation Development PUDs.
Detached ADU Size Limits
- –Maximum size of 1,000 sq ft for a detached accessory dwelling unit.
Max Units
- –1 ADU (Caretaker Dwelling Unit) per lot, attached to the single-family home; Up to 2 caretaker dwelling units per parcel (CD-PUD)
Owner Occupancy
- –Owner occupancy not required; limited to employees or owner's family.
Parking
- –2 off-street spaces/ADU; max not stated; parking set via PUD in certain districts (PUD/AH-PUD, P-I, SKI-REC); Urban Area PUDs may allow variations.
Rental Restrictions
- –If rented, minimum lease term of 6 months; occupancy limited to up to two adults (and related children) who are qualifying community employees or the owner’s immediate family.
- –Short-term rentals prohibited in RR and TR-2 zones.
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.
Pitkin County