Accessory Dwelling Units (ADUs)


The construction of an ADU, whether resulting from an interior remodel or an addition, needs zoning approval, along with a building permit. Most zoning approvals occur over the counter at the permit center, but under certain scenarios that are specific to your lot, it may require Planning Commission approval. If Planning Commission approval is required, expect 6 – 8 weeks for a decision.

Zoning & Building Review

ADU’s are no more than 1,000 square feet, or half the size of the accompanying home, whichever is smaller, and depending on your lot size. Please check with a Planner to determine what is allowed on your lot before beginning your project. Fire and sound separation is required between the house and ADU. The water line size may need to be increased, and a water meter will be required. Additional parking requirements may also apply.

ADU Grant Program

On August 21, 2023, the Accessory Dwelling Unit Grant program (ADUG), was created and offers an incentive of up to $13,500 for 16 homeowners annually seeking to develop an ADU. ADUs are currently providing Juneau residents a unique, affordable housing option, while simultaneously benefiting the homeowners in extra rental income.  Please visit the ADU Grant Program page HERE to learn more about the program, and to apply.

If you have questions, contact:
Joseph Meyers
Housing & Land Use Specialist
[email protected]
(907) 586-0753 ext. 4209

Items to submit for permit application

Site Plan (If Expanding the Footprint)

  • Site plan must be to scale
  • Include dimensions of the fence
  • Include accurate property line locations in relation to proposed fence
  • Sample Site Plan

Foundation Plan (If Expanding the Footprint)

Structural/Foundation Plan

  • If there are walls over 10 feet, you’ll need to use a structural or civil engineer

Floor Plan

  • If you are changing the interior of your home to accommodate an ADU, please show an existing floor plan and a proposed floor plan.
  • Label all rooms
  • Show all interior square footage
  • Show all water facilities (toilet, sink, tub, shower, etc.)
  • Example Floor Plan

Fire and Sound Separation Plan

Accessory Apartment Application

Building Permit Application