Accessory Dwelling Units

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Accessory Dwelling Units (ADU), also called secondary dwelling units, in-law units, granny suites or cottages, are dwelling units attached to or within a residential building or a detached residential building that meet the provisions of the NC Residential Code. An ADU is intended to be an "accessory" to the main house, and include their own kitchen, living area, bedroom, and bathroom facilities. Attached Decks/Porches must meet the provisions of the NC Residential Code- Appendix M.

First, you must receive Zoning Approval of an Accessory Dwelling Unit. Contact the Guilford County Planning & Development Department if your property is within unincorporated Guilford County or if within Town limits, contact the appropriate Town’s Planning Department.

To permit an Accessory Dwelling Unit (Attached or Detached) you will need to submit:

  • Apply for Permit Type: Residential Building-Addition (Attached ADU) or Permit Type: Residential Building-New Single Family-Detached (Detached ADU) utilizing Civic Access public portal, providing a complete description of the proposed work.
  • A Plot Plan meeting all the specifications listed below in Plot Plan Requirements.
  • Construction Plans meeting all the specifications listed below in Construction Plan Requirements. 
  • Development Clearance Certificate containing all approved information approved from the Town, if the property is located within a Town served by the Inspections Department.
  • An Appointment of a Lien Agent for projects costing $40,000 or more.
  • A certificate of Workers' Compensation insurance or a completed affidavit of Workers Compensation exemption form for contractors for projects costing $40,000 or more. 
  • A notarized Owner-Contractor Exemption Affidavit for projects costing $40,000 or more and where an owner is listed as the general contractor.
  • If the property is served by well and/or septic, separate permits or approvals may be required from Environmental Health.  
  • Additional approvals may be required from Guilford County Planning & Development regarding Zoning- Use & Setbacks, Watershed and Soil Erosion.
Plot Plan Requirements
Construction Plan Requirements