Seattle Building Permit Timeline: How Long Does It Really Take?

How long will the permit take? It depends on what you're building. A deck permit can clear in two months. A 200-unit apartment building can take three years.

Typical Timelines by Project Type

Three things drive the timeline: project complexity, whether design review is required, and SDCI's current backlog.

Project Type	Typical Timeline	Notes
Simple residential (deck, remodel, ADU)	2-4 months	Straightforward review, no design review
New single-family home	3-6 months	May require pre-application site visit
Small multi-family (under 8 units)	4-8 months	May avoid design review depending on zone
Large multi-family (8+ units)	12-36 months	Includes design review process
Mixed-use development	12-36 months	Land use + building permit, plus design review
Commercial/office	6-18 months	Depends on size and zoning complexity

These ranges cover the full process from application to permit issuance. Actual construction time is on top of this.

What Affects Your Timeline

1. Design Review

The single biggest factor. Projects that trigger Design Review (typically 8+ units in lowrise zones) add 6-18 months to the process. The two-meeting sequence, Early Design Guidance followed by a Recommendation meeting, has its own scheduling backlog.

2. Completeness of Submission

Incomplete applications get sent back for corrections, which restarts the review clock. Most applications go through at least one round of corrections.

3. Environmental Review (SEPA)

Larger projects require State Environmental Policy Act (SEPA) review, which adds its own analysis timeline and can be appealed.

4. Appeals

Any design review decision or SEPA determination can be appealed. Appeals add months, sometimes years.

5. SDCI Staffing and Backlog

Review times fluctuate with the department's workload. They run longer during construction booms and shorter during slowdowns.

The Permit Process Step by Step

Pre-application research. Check zoning and determine what permits are needed.
Pre-Application Site Visit (PASV). Optional but recommended; a 20-minute coaching session with SDCI staff.
Submit application. Upload plans and pay initial fees (approximately 75% of total).
Initial review. SDCI checks for completeness (2-8 weeks depending on complexity).
Corrections. Address any reviewer comments and resubmit.
Approval. Plans are approved, and you pay remaining fees.
Permit issuance. Pick up your permit and begin construction.

How to Track Your Permit Status

Check the Seattle Services Portal

The Seattle Services Portal shows real-time status for any permit by number or address. You can see which review stage you're in and whether corrections are pending.

Monitor on BuildVue

For professionals tracking multiple projects, BuildVue shows permit status across your entire portfolio or area of interest. Set up saved searches with email alerts to get notified when permit statuses change.

Tips for Faster Approvals

Attend an SDCI coaching session, a free 20-minute video call to answer questions before you submit
Submit complete applications, since incomplete submittals are the #1 cause of delays
Start design review early if your project triggers it — DR has its own scheduling backlog on top of everything else
Hire a permit expediter for complex projects — they know which reviewers handle which project types and how to keep things moving
Respond to corrections fast — the clock stops while SDCI waits on you