Accessory Dwelling Units – Detached

Consistent with Utah State and Herriman City codes, residents may apply for a permit to build and manage a "detached accessory dwelling unit" (D-ADU) on their residential property. However, specified requirements must be met to obtain a D-ADU permit. A complete copy of Herriman City's zoning regulation for D-ADUs is available online (contact the Zoning Department at 801-446-5323).

To see if you qualify to have a D-ADU, check the General Requirements. If you want to verify your zoning or have any other questions regarding the general requirements, please call 801-446-5323 and ask for the Planning Department or email planning@herriman.gov.

Requirements for submitting a permit application for a D-ADU

1. Verify your lot qualifies for a D-ADU. Check that your property is in a Residential or Agricultural Zone and that your lot is .2295 acres or larger by searching your address on the Herriman Zoning Map. Also be aware that only one (1) accessory dwelling unit is allowed per lot (either an internal or detached ADU).
2. Application Form
3. Site Plan (see D-ADU Sample Site Plan) showing the entire property, the principal dwelling, the location and setbacks of the detached structure, the pathway to it, and all parking.
4. Picture of Address (see D-ADU Sample Address) showing the front of the home and the location of the additional address with a "D" (for detached) unit letter that will be visible from the street for emergency responders.
5. Construction Plans (Plans Examiners may require engineered stamped plans.)
   1. Structural Calculations (engineered stamped calculations may also be required).
6. Energy Efficiency Documents
7. Manual J, D & S
8. Contractor Agreements -or- Owner/Builder Documents (only allowed if the owner is going to live in the D-ADU and rent the house).
   1. Contractor Agreements – to be signed by the General Contractor.
   2. Owner/Builder Certificate & Homeowner Grading Agreement – see the Owner/Builder page for more information.