Most properties in unincorporated Weld County can now have an Accessory Dwelling Unit with just a building permit (ADU permit). In the Agricultural zone, including in Ag-zoned subdivisions like Aristocrat Ranchettes, Arrowhead, and Indianhead, a minimum of 1 acre is required if the property has public water and is on septic. A minimum of 2.5 acres is required for lots on well and septic.
ADUs are also allowed in the Estate zone, and in R-1, R-2, and R-5 zone districts if the lot has public water and public sewer. Lots of at least 1 acre with public water may have an ADU on septic if the nearest sewer line is at least 400 feet from the property.
An ADU could be a second house, within a house, attached to a house, or over a garage, for example. There are no size limits but ADUs must meet the same building code requirements as all other homes. No more than one ADU (two dwelling units total) per lot is allowed.
The ADU must share the driveway with the existing house. No new driveways are allowed for ADUs.
You will need to contact your water provider to find out if an additional tap is required, or the state Division of Water Resources if you are on well water: 970-352-8712. Please also contact the County Environmental Health Department regarding septic system permits: 970-400-6415.
To apply, please visit: https://www.weld.gov/files/sharedassets/public/v/2/departments/building/documents/building-permits/adu-application.pdf.