Pre-Approved Accessory Dwelling Unit Program

The City of Bainbridge Island is participating in a countywide program to provide a variety of pre-approved Accessory Dwelling Units (ADU) building plans for use free of charge in Kitsap County. This program is led by the Kitsap Regional Coordinating Council (KRCC) in collaboration with all Kitsap County jurisdictions, including Bainbridge Island, Bremerton, Port Orchard, and Poulsbo. For more information on this countywide effort, please visit the KRCC Pre-Approved ADU Program website.

ADU Plan Set Request Form Announcement

Pre-Approved ADU Plans

Plans for five (5) approved models of ADU plans are available now – see details about each of the options below. The Salish model will be available pending final plan approval. 

The Lilli_480sqftThe Lille
480 Sq. Ft.
One-Bedroom
One-Story		Cut Sheets
The Sidney_600sqftThe Sidney
600 Sq. Ft.
One-Bedroom
One-Story		Cut Sheets
The Sinclair_800sqftThe Sinclair
800 Sq. Ft.
Two-Bedroom
One-Story		Cut Sheets
The Blakely_800sqftThe Blakely
800 Sq. Ft.
Two-Bedroom
Two-Story		Cut Sheets
The Kitsap
672 or 834 Sq. Ft. 
One-Bedroom / Two-Car Garage
Two-Bedroom / Three-Car Garage
Two-Story		Cut Sheets
The Salish
1000 Sq. Ft. 
Three-Bedroom
One-Story		Cut Sheets

The City of Bainbridge Island is excited to offer this opportunity for pre-approved ADU building plans – before getting started, please review the following considerations:

  • Plan selection: Choose from the available pre-approved ADU plan sets, then complete & submit the plan request form to permittingsubmittal@bainbridgewa.gov to obtain the full, stamped plan set from the Planning & Community Development Department. 
  • Site selection: The City strongly encourages anyone who is interested in building an ADU to contact the Planning and Community Development (PCD) Department to discuss site feasibility such as zoning, critical areas review, shoreline designations, and other land use requirements.
  • Project Review: All ADU plans will need to be reviewed by COBI staff in addition to the Building Department to ensure compliance with the City’s land use regulations, development standards, and environmental protection laws. Pre-approved ADU plans are still required to undergo the necessary review process for project approval.
  • Additional Fees: Although pre-approved ADU plans are free, additional fees will be required as part of the permitting process. The fees cover the costs of reviewing your applications, permits, and inspections. Final permit fees will be calculated at the time of payment. For detailed information regarding current permitting fees, please see the City of Bainbridge Island Annual Fee Schedule.
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