Eastside DADU Timelines: Permits, Utilities and Construction
A DADU schedule needs separate dates for property research, design, utility responses, permit review, construction and final approvals. A published review target for one application is not the time from your first idea to move-in.
Sources checked November 5, 2026. Confirm the requirements for your parcel with its permitting authority.
Which local timeframes are actually published?
| Local source | Published timing statement | What it does not establish |
|---|---|---|
| Bothell ADU checklist | Up to two weeks for the city’s water/sewer availability processing | The complete DADU building-permit duration. |
| Kirkland pre-approved plan page | Faster permit approval, advertised as little as a few weeks | Eligibility or an approval date for every site. |
Use the timing statement for the specific task it describes. Confirm the current workload and conditions with the authority when establishing your project schedule.
Official guidance: Bothell ADU checklist with 2026 fees, Kirkland pre-approved DADU plan program.
What information should a project schedule show?
- Feasibility: resolve the jurisdiction, use and major site questions.
- Design: coordinate the footprint, structure and service approach.
- Applications: submit complete packages and respond to comments.
- Construction: sequence site work, building systems and finishes.
- Closeout: complete inspections, corrections and occupancy requirements.
Identify which milestones depend on someone outside the construction team. Give those tasks an owner and a next action so a delay produces a clear update rather than an unexplained change to the final date.
Why can two DADUs in the same city take different paths?
One site may meet the conditions for a pre-approved plan program while another needs a separate environmental or utility review. One owner may have a coordinated drawing set while another is still changing the footprint. Those are different schedule starting points.
Compare plans using an agreed readiness checklist. Record what is complete, what is in review and what is still a decision. This is more useful than attaching a generic duration to the word “DADU.”
What should you ask before agreeing to a start date?
- Which approvals and service responses remain outstanding?
- Which selections must be fixed before ordering or installation?
- What assumptions support the proposed construction sequence?
- Which inspections and final documents precede occupancy?
TimberworX can discuss the sequence in a free consultation. Detailed design and budgeting are paid preconstruction services. A committed project schedule should be developed from the actual property, approved scope and procurement needs.
A few things to know
Does a utility response equal a building permit?
No. They are separate milestones.
Can Kirkland’s fastest advertised review time be treated as a guarantee?
No. The program has site qualifications and the actual application still needs review.
Keep planning
Bothell DADU Permits: Documents, Utilities and Fees
Bothell’s DADU application needs address assignment, utility availability and fire-flow information. See the permit sequence and 2026 fee categories.
Kirkland Pre-Approved DADU Plans: Costs and Conditions
Kirkland’s pre-approved DADU program includes a designer license up to $1,000 and site qualifications for expedited review. See what remains to approve.
Can You Build a DADU in Snoqualmie’s Floodplain?
Snoqualmie distinguishes floodway from floodplain DADU sites. Learn its elevation, drainage-report and flood improvement permit requirements.