5 county-level rules, plus city-specific rules for 1 city in Weld County, Colorado.
Verified from official government sources
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.
Weld 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.
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.
Weld 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.
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.
Weld 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.
A carport is an accessory structure. In the unincorporated Agricultural zone covering most of Weld County, it must meet the 20-foot minimum setback and the minimum offset of three feet, or one foot per three feet of building height, whichever is greater.
Weld 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.
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.
Weld County Code § 23-3-20(J)
One (1) SINGLE-FAMILY DWELLING or GROUP HOME per LEGAL LOT.
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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