Woodinville DADU Permits: Where to Apply
A Woodinville DADU application starts by checking city limits. City parcels use Woodinville’s permit system; unincorporated parcels may fall under King or Snohomish County. Water-district approval follows the service provider, not the postal city.
Sources checked November 5, 2026. Confirm the requirements for your parcel with its permitting authority.
Which Woodinville permit system should you use?
The city’s property-information page explicitly distinguishes Woodinville postal addresses from city jurisdiction. Use its interactive map or the linked parcel lookup. Record the jurisdiction before selecting forms or applying a city ADU standard.
For a parcel inside the city, start from the Applications & Forms page. It links the current online portal for submissions, revisions, payments, inspections and project tracking. Following that page avoids relying on an old bookmarked system.
Official guidance: Woodinville property jurisdiction lookup, Woodinville applications, checklists and permit portal.
Which application documents should you assemble?
Woodinville publishes building, site-plan and construction-submittal requirements, along with separate civil, drainage-report and site-development documents. Use the construction checklist to identify the applicable package for the actual proposal.
- A coordinated site plan and building plans.
- Owner authorization where an agent applies.
- The applicable building, mechanical and plumbing application.
- Utility availability and any requested civil or drainage information.
Document why an item is not applicable before removing it from the working checklist. A cottage design and its service work should describe one project, including any existing structure to be demolished.
Official guidance: Woodinville applications, checklists and permit portal.
Does the city approve water and sewer connections?
For property served by Woodinville Water District, the district’s published ADU policy addresses separate detached-unit connections and availability certification. City building review and district connection review need to be tracked together.
Draw the proposed route from the cottage to the service point. Identify private excavation and restoration separately from provider charges. A permit fee allowance should state whether utility certification, connection charges and private service construction are included.
Official guidance: Woodinville Water District ADU connection policy.
What is the next step for your property?
Use the jurisdiction guide below if the address boundary is unclear. If city jurisdiction is established, bring the application checklist, site concept and utility-provider information to the design discussion.
TimberworX offers a free initial consultation for Woodinville DADU planning. Detailed design, site research and budgeting are paid preconstruction work. Agree which permit documents and utility decisions will be developed before the construction scope is priced in detail.
A few things to know
Is every 98072 property reviewed by Woodinville?
No. Confirm the parcel’s city or county jurisdiction.
Can a water-district response replace a city building permit?
No. Track the building application and utility approval as separate parts of the project.
Keep planning
Woodinville DADUs: City or County Rules?
Does Woodinville, King County or Snohomish County review your DADU? Follow the parcel lookup before choosing zoning and permit requirements.
Do you need a survey for a DADU?
Understand how a DADU site plan differs from a survey and which property information supports design and permit review.
Can a DADU use septic or existing utilities?
Check septic capacity, sewer availability, water service and utility routes before committing to a DADU design in King County.