Accessory Structures in Weld County, CO (2026)
5 county-level rules, plus city-specific rules for 1 city in Weld County, Colorado.
Verified from official government sources
ADU Rules
In unincorporated Weld County, one accessory dwelling unit is allowed per legal lot where Article III permits it. The ADU may be attached, detached, or inside a single-family dwelling, but is barred on a lot with a duplex. Greeley and Evans set their own city ADU rules.
ADU Rules in Weld County, CO: One Per Legal Lot
Some RestrictionsWeld County Code § 23-4-600
An ADU may be attached to, detached from, or contained within a SINGLE-FAMILY DWELLING. An ADU is not permissible on a LOT with a DUPLEX. No LOT shall contain more than one (1) ADU. No ADU shall be permitted unless the Department of Planning Services has determined the LOT to be a LEGAL LOT.
ADU Impact Fees
Weld County's Impact Fee Ordinance charges road, drainage and county-facilities impact fees on new development in the unincorporated area. Under Weld County Code § 20-1-70(A), an accessory structure is exempt from road and facilities fees only if it does not create an additional dwelling unit, so an Accessory Dwelling Unit owes the fee.
ADU Impact Fees in Weld County, Colorado
Some RestrictionsWeld County Code § 20-1-70(A)
The following shall be exempt from the terms of this Chapter. An exemption must be claimed by the fee payer at the time of issuance of a building permit. The Director shall determine the validity of any claim for exemption. A. Any residential remodeling, enlargement, addition, replacement or construction of accessory structures that does not result in the creation of any additional dwelling un...
Shed & Carport Rules
In the unincorporated Agricultural zone that covers most of Weld County, accessory structures such as sheds must meet a minimum 20-foot setback and a minimum offset of three feet, or one foot per three feet of building height, whichever is greater.
Shed Rules in Weld County, CO: 20-Foot Setback
Some RestrictionsWeld County Code § 23-3-70(B), (C)
Minimum SETBACK: twenty (20) feet... Minimum OFFSET: three (3) feet, or one (1) foot for each three (3) feet of BUILDING HEIGHT, whichever is greater.
Garage Conversions
In unincorporated Weld County, converting a garage into living space creates an accessory dwelling unit. An ADU may be contained within a single-family dwelling, but only one ADU is allowed per legal lot and it must meet Chapter 23 zoning and building-permit requirements.
Garage Conversions in Weld County, CO: Treated as an ADU
Some RestrictionsWeld County Code § 23-4-600(A), (C)
An ADU may be attached to, detached from, or contained within a SINGLE-FAMILY DWELLING... No LOT shall contain more than one (1) ADU.
Tiny Homes
In the unincorporated Agricultural zone, Weld County allows one single-family dwelling per legal lot. A site-built tiny home on a foundation is that dwelling (or an ADU); a tiny house on wheels is treated as a recreational vehicle and cannot be a permanent residence.
Tiny Homes in Weld County, CO: One Dwelling Per Lot
Some RestrictionsWeld County Code § 23-3-20(J)
One (1) SINGLE-FAMILY DWELLING or GROUP HOME per LEGAL LOT.
Accessory Structures by City in Weld County
1 cities in Weld County have their own accessory structures rules. Each link goes to that city's dedicated page with code citations.
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