How Seattle SDCI permits actually work (timelines & tips)
Nothing surprises Seattle homeowners more than the permit. People budget for the build and forget that the city's review can take longer than the construction. The good news: once you understand the two permit paths and what causes delays, the timeline becomes predictable — and largely manageable. Here's how the Seattle Department of Construction & Inspections (SDCI) really works.
The two paths: STFI vs. full plan review
Almost every residential project falls into one of two buckets, and which one you're in sets your timeline.
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Subject-to-Field-Inspection (STFI)
For limited, lower-risk, typically non-structural work — think replacing fixtures, certain like-for-like repairs, some mechanical and electrical work. Instead of reviewing drawings up front, the city inspects compliance in the field. These can issue in days to a couple of weeks.
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Full plan review
Required for additions, ADUs/DADUs, structural changes, and anything that alters the footprint or major systems. Reviewers examine your drawings before issuing. This commonly runs a few months from intake to issuance, and longer if your project triggers extra reviews.
A realistic timeline for a plan-review project
| Phase | Typical duration | What happens |
|---|---|---|
| Design & permit-ready drawings | 4–10 weeks | Architecture, engineering, energy code |
| Intake & screening | days–weeks | SDCI accepts a complete submittal |
| Plan review (first round) | several weeks–months | Reviewers check the drawings |
| Corrections & resubmittal | weeks per cycle | Each round-trip restarts the clock |
| Issuance | on approval | Pay fees, permit issued, build starts |
Durations vary with project complexity and SDCI workload; this is a planning framework, not a guarantee.
Why permits get delayed (and how to avoid it)
Delays almost never come from the city being slow for no reason — they come from predictable friction points:
- Incomplete submittals. Missing a required form, calculation or sheet sends the package back before review even starts. A complete-the-first-time submittal is the single biggest time-saver.
- Correction cycles. When a reviewer requests changes, the project goes back to you and the clock effectively restarts. Two or three avoidable correction rounds can add months.
- Extra reviews. Land-use review, design review, drainage review and tree protection apply to certain lots and project types. Knowing in advance whether yours triggers them prevents nasty surprises.
- Multi-reviewer routing. Structural, electrical, mechanical and site reviewers can each comment. Coordinated, code-correct drawings reduce conflicting comments.
This is where a design-build team earns its keep: we assemble complete, code-correct submittals, anticipate which reviews your lot triggers, and respond to corrections fast — so your project doesn't sit waiting on a missing sheet.
The smartest move: overlap, don't wait
You don't have to treat permitting as dead time. We sequence projects so that design refinement, product selections and material procurement happen during review, and the crew is staged to start the day the permit issues. That overlap is often the difference between a project that feels stalled and one that feels seamless. It's the same approach we use on our ADU/DADU builds and home additions, where plan review is unavoidable.
Planning a project that'll need a permit? We handle the entire SDCI process for you. Request a free estimate or call (206) 593-3597 and we'll map your specific path.
Seattle permits — common questions
How long does a Seattle building permit take?
It depends on the path. A simple STFI permit can issue in days to a couple of weeks. A full plan-review permit for an addition, ADU or structural remodel commonly takes a few months, longer if it triggers land-use, drainage or correction cycles.
STFI permit vs. full plan review?
STFI covers limited, non-structural work inspected in the field — fast. Full plan review is required for additions, ADUs/DADUs, structural changes and footprint changes; reviewers examine your drawings before issuing.
Why do permits get delayed?
Incomplete submittals, correction cycles that restart the clock, land-use or design review, drainage and tree-protection requirements, and routing to multiple reviewers. A complete, code-correct first submittal avoids most of it.
Can I start work before the permit issues?
No — that risks stop-work orders, fees, and being forced to open up finished work. We sequence design and procurement during review so the crew can start the day the permit lands.