Accessory Dwelling Units (ADUs)

Overview

The construction of an ADU, whether resulting from an interior remodel, an addition, or new construction, needs zoning approval to verify that the proposed ADU meets zoning standards, along with a building permit. Zoning approvals are typically completed through the building permit process. Staff may request additional information during this review. An ADU requires the following forms:

  • Development Permit Application
  • ADU Permit Application
  • Building Permit
  • ADU Grant Application (optional)

Please review each form for required submittal items to include in your application packet.

Zoning & Building Review

ADU’s come in two general categories: attached/internal and detached. Detached ADU’s can be up to 1,000 square feet in size and attached/internal ADU’s can be 1,000 square feet or 40% of the size of the primary home, whichever is greater. Additional parking requirements may also apply. 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 primary dwelling unit and ADU. The water line size may need to be increased, and a water meter will be required. Please contact the Buildings section with questions on building code requirements at (907) 586-0767.

ADU Grant Program

The Accessory Dwelling Unit Grant program (ADUG) offers an incentive of up to $13,500 for homeowners 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. Please note, ADU Grant applications need to be submitted at the same time as your building permit application.

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

Items to submit for permit and ADU application

Site Plan

  • Site plan must be to scale
  • Include dimensions
  • Include accurate property line locations
  • Show parking and setbacks
  • 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 Dwelling Unit (ADU) Application

Building Permit Application