Permitting is one of the least glamorous parts of a home remodel and one of the most misunderstood. If you ask a neighbor whether their kitchen remodel needed a permit, you’ll likely get a confident answer, but it might not be the right one. The rules are specific, the consequences of getting it wrong are real, and the process has its own quirks here in Seattle that are worth understanding before you start planning.
We pull permits through SDCI every month, so here’s a helpful recap of everything that’s involved.
Do You Need a Permit to Remodel in Seattle? A Plain-English Guide
What Requires a Permit in Seattle
This is the general rule: any work that affects the structure, electrical system, plumbing, or mechanical systems of a home requires a permit. Cosmetic work, like changing what a space looks like without touching what makes it stand up or function, generally doesn’t.
Projects that require a permit:
- Structural changes: removing or adding walls (load-bearing or not), adding a beam, cutting new openings for doors or windows, any work that affects the structural frame
- Electrical work: adding new circuits, upgrading a panel, adding outlets or switches beyond simple like-for-like replacements, any new dedicated circuits for appliances
- Plumbing: relocating a sink, toilet, or shower drain; adding new plumbing fixtures; any work that changes the supply or drain configuration
- Mechanical: adding or modifying HVAC ductwork, installing a new ventilation system, relocating gas lines
- Additions: any expansion of the home’s square footage, including DADUs, ADUs, decks over 30 inches off grade, and accessory structures above a certain size
- Certain demolition: significant demolition, particularly in homes with potential hazardous materials like asbestos or lead paint
Projects that do not require a permit:
- Painting, wallpaper, and other surface finishes
- Flooring replacement such as hardwood, LVP, or carpet over an existing subfloor
- Replacing cabinets and countertops without moving plumbing or changing structural framing
- Like-for-like fixture replacements: swapping a toilet, faucet, or light fixture for an equivalent without changing the rough-in location
- Replacing appliances
- Minor repairs: patching drywall, replacing a door or window in the same opening
Here’s a quick recap of the nuance: a kitchen remodel that involves only new cabinets, countertops, and appliances might not need a permit. The same project with a relocated sink, new island electrical, or any structural change does. Scope defines the permit requirement.
How the SDCI Process Works
Seattle’s permitting authority is the Seattle Department of Construction and Inspections (SDCI). They process permits online through the Seattle Services Portal. Here’s how the process works for residential remodels:
Submit your application
Applications are submitted online with project drawings, a site plan, and sometimes a structural engineer’s calculations, depending on the scope. For complex projects, such as anything involving structural changes, additions, or new systems, drawings must be prepared by a licensed architect or engineer. SDCI reviews applications for code compliance before issuing the permit.
Permit types and review tracks
- Over-the-counter (OTC) permits: For straightforward, lower-risk projects such as like-for-like mechanical replacements or simple electrical work. These can sometimes be approved the same day or within a few days of application.
- Standard residential permits: Typically for most kitchen and bathroom remodels with structural or systems work. Reviewed in queue by SDCI plan reviewers. This is the most common track for residential remodeling projects.
- Complex permits: For additions, DADUs, or projects with significant structural changes. These go through a more detailed review and may involve multiple city departments.
Inspections
Most permits require one or more inspections during and after construction. A rough inspection happens after the structural, electrical, or plumbing work is done, but before walls are closed up. A final inspection confirms the work is complete and code-compliant. Scheduling inspections is the homeowner’s or contractor’s responsibility and delays in getting inspections scheduled can affect project timelines.
Realistic Timelines in 2026
SDCI timelines have varied significantly in recent years. Here’s what to realistically expect for common residential permit types in 2026:
- Simple OTC permits: A few days to two weeks from submission
- Standard residential remodel (kitchen, bathroom with structural work): 4-8 weeks from submission to permit issuance, depending on reviewer workload and whether corrections are required
- Additions and DADUs: 6-12 weeks or longer, particularly for projects requiring early design guidance or coordination with multiple departments
These timelines assume a first submission that’s fully correct. If SDCI issues a correction notice (which is common even on well-prepared applications) the clock resets while you address the corrections and resubmit. Experienced teams like CRD know how to prepare applications that minimize back-and-forth, but plan for it regardless.
Common Surprises in the Seattle Permitting Process
Unpermitted prior work
This is the most common complication we see when remodeling older Seattle homes. For example, a previous owner added a bathroom, moved a wall, or finished a basement without pulling permits. Then, once you open a permit on a property, the city can require that existing unpermitted work be brought up to code before the new permit is finalized. Discovering this during a remodel adds both cost and time.
It’s worth doing a permit history search on your property (available through SDCI’s online portal) before you start planning a project, so you know what you’re working with.
Seattle’s tree ordinance
Seattle has one of the more stringent urban tree protection ordinances in the country. If your project involves removing trees or building within the drip zone of a significant tree, you may need a separate tree removal permit, an arborist report, or both. This is particularly common for addition projects and DADUs where the construction footprint could encroach on existing trees.
Scope expansion during construction
It’s common for a remodel to reveal conditions that change the scope, such as water damage behind a wall, outdated wiring, deteriorated framing. When this happens, the contractor needs to assess whether the additional work will require a permit amendment or a new permit altogether. A good design-build team like CRD will handle this proactively rather than hoping an inspector doesn’t notice.
Here at CRD Design Build, permitting is part of every project we undertake. We handle the application, coordinate with SDCI through the review process, schedule all inspections, and manage any corrections. For our clients, it’s one less thing to think about.
Contact CRD Design Build to schedule a consultation. We’ll give you a clear picture of what your project will require, permits and all.
