Whether you need a permit to re-roof your home in Washington depends almost entirely on where the house sits. Permitting is handled locally — by your city if you are inside city limits, by the county if you are not — and the answer genuinely changes from one side of a boundary to the other.
In unincorporated King County, a standard re-roof usually needs no permit at all. In unincorporated Snohomish County, it usually does. Inside city limits, every city sets its own rule.
We have been pulling roofing permits across King and Snohomish counties since 1983. Here is what actually triggers a permit, what happens at inspection, and what we handle for you.
Do I Need a Permit to Replace My Roof?
Short answer: it depends on your jurisdiction and on whether the work is structural. Like-for-like replacement is often exempt. Anything that touches the roof sheathing, changes the type of material, or adds significant weight generally is not.
Three questions decide it:
- Who has jurisdiction? A city, if your address is inside city limits. Otherwise the county — and King and Snohomish counties start from opposite defaults.
- Are you touching the sheathing? Removing or replacing the plywood or boards under the roofing is structural work. It needs a permit and an inspection almost everywhere.
- Is the new roof heavier? Swapping a light material for tile or slate adds dead load to a frame that was engineered for something else.
Everything below is the detail behind those three questions.
Unincorporated King County
Standard re-roofing on detached one- and two-family houses in unincorporated King County generally does not require a building permit. The county’s own guidance lists replacement of roofing or siding for detached one- and two-family houses as work that is exempt.
No permit needed for:
- Tear-off and replace. An ordinary residential re-roof.
- Overlay. Adding a layer over the existing roofing, as long as it stays inside the structural weight limit.
- Minor repairs. A few compromised shingles, or a localized leak.
A permit is required for:
- Commercial and multi-family buildings. Apartments, condos, and commercial structures always need one for roofing work.
- Environmentally critical areas. A steep slope, wetland, or protected shoreline carries its own review, and the roofing exemption does not apply.
- A real increase in weight. Going from a lightweight material to heavy tile or slate raises the roof’s dead load. King County code sets the trigger at more than 5 pounds per square foot of added cumulative dead load.
Unincorporated Snohomish County
Snohomish County runs the opposite default. In unincorporated areas a re-roof permit is required unless the work fits inside a specific exemption.
Exempt from permit:
- An overlay on a residential structure, up to a maximum of two total layers of roofing material.
- A complete tear-off and replacement using the same type of roofing material, provided the roof sheathing is not removed or replaced.
- Roof repairs.
Permit required if you are:
- Replacing roof sheathing.
- Changing the type of roofing material.
- Exceeding the maximum layer limit or the weight limit.
| The work | Unincorporated King County | Unincorporated Snohomish County |
|---|---|---|
| Tear-off and replace, same material, sheathing untouched | No permit | No permit |
| Overlay — adding a layer | No permit, within weight limits | No permit, up to 2 total layers |
| Minor repairs | No permit | No permit |
| Removing or replacing roof sheathing | Permit | Permit |
| Changing to a different type of material | Permit if it adds more than 5 lb/sq ft dead load | Permit |
| Steep slope, wetland, or shoreline property | Additional review — exemption does not apply | Additional review |
| Commercial or multi-family building | Permit | Permit |
Inside City Limits, the Rules Vary
If your address is inside a city, that city — not the county — decides. The rules differ meaningfully from one to the next, which is why we do not publish a single blanket answer for the region.
Seattle is a good example of why that matters. SDCI does not require a re-roof permit for a one- or two-family home or townhouse where the only change to the building envelope is adding or replacing insulation to an equal or better value. A permit is needed once the work alters the envelope some other way — roof pitch, new skylights, rooftop equipment, or structural deck work — and for commercial or multifamily work over 500 square feet.
We keep a page for every city we work in, with that city’s permit office, application portal, and requirements. Start at our roofing permit directory, or go straight to Seattle, Bellevue, Kirkland, Redmond, Woodinville, or Everett.
On cost: most of these jurisdictions calculate the permit fee from the valuation of the work rather than charging a flat rate, so a larger or more complex roof costs more to permit than a small rambler. Across King and Snohomish counties they generally run $150 to $600. Check your city’s published fee schedule before you budget — or ask us, and we will confirm the real figure for your address with your estimate.
When a Re-Roof Becomes Structural Work
The most common way a routine job turns into a permitted one around here is cedar.
Older cedar shake roofs were installed over skip sheathing — spaced 1×4 boards with gaps between them. Composition shingles cannot be laid over that. So when we remove a cedar shake roof installed over skip sheathing, we install all new ½” CDX plywood before re-roofing. That is a structural change, and it requires an inspection.
The same applies if we find rot in the decking or rafters once the old roof is off. It changes the scope of the job, and we tell you before we proceed rather than after.
Why new construction and re-roofing are inspected differently
On a new build, the general contractor is responsible for obtaining all permits and scheduling inspections. The framing stays exposed to the weather for days at a time, which gives the inspector a thorough look at the plywood roof deck and the nailing patterns.
A re-roof is the opposite situation. We dry in the home with waterproof underlayment immediately after tear-off to protect it — we do not leave a roof exposed for any length of time. Where an inspection is required, the inspector does spot checks under the paper to confirm proper nailing.
That is the reason many cities and unincorporated county areas do not require an inspection when we tear off one or two layers of composition shingles and replace them with similar material: the plywood was already inspected for its nailing pattern when the home was built, the weight of the new roof has not changed substantially, and nothing structural has been altered. Some cities still inspect every roof to review nailing and ventilation regardless.
HOA Approval Is Separate From Your Permit
A homeowners association is not a permitting authority, but it can still stop your project. Many have covenants restricting the type of material, its weight, and even its color. Approval from the HOA is separate from the city or county permit — you need both, and the HOA is often the slower of the two.
In many neighborhoods where a homeowner is converting from a cedar shake roof to composition, the HOA specifically requires re-roofing with CertainTeed Presidential TL in select colors. Check your covenants before you settle on a product, not after.
Historic districts and landmarks. Seattle neighborhoods with landmark status — and homes individually listed — may need design review before a change of material or color. That adds time, so start early.
Who Pulls the Permit — and Why It Should Be Us
Where a permit is required, a licensed contractor should pull it. If a homeowner pulls it themselves as an “owner-builder,” they take on the liability for the work meeting code — including work they did not perform.
Be cautious of any contractor who suggests skipping a required permit to save money, or who asks you to pull it in your own name. Both are signals worth paying attention to. An unpermitted roof can surface later as:
- A problem at resale. Unpermitted work shows up in county records, or fails to show up when a buyer’s agent expects it to. Either way it can hold up a transaction.
- An insurance dispute. Carriers have declined claims on work that was never permitted or inspected.
- A retroactive permit. Cities can require you to open up completed work for inspection after the fact, at your cost.
Where a permit is required, its fee is a small fraction of a roof replacement. It is not the place to economize.
How Long Permitting Takes
Short answer: where a permit is required, expect it to add roughly one to two weeks before work starts — and because it runs in parallel with scheduling, it rarely delays the job itself.
We submit the application as soon as the contract is signed, so review happens while we are scheduling materials and crews. For a standard re-roof with no structural change, most jurisdictions turn it around inside a week.
The exception is a complex, historic, or critical-area property, where review can run several weeks. If that applies to your home, we will tell you at estimate time rather than after.
What We Handle for You
On every job, Stout Roofing takes care of:
- Determining whether your address needs a permit at all, and from whom
- Preparing and submitting the permit application
- Providing licensing, bonding, and insurance documentation
- Scheduling and meeting all required inspections
- Closing out the permit so it does not sit open on your property record
That last item gets missed surprisingly often. An open permit can cause exactly the same resale headaches as no permit at all. We close ours out.
Planning a project? Our roof cost calculator gives you a ballpark for the work itself, and we offer financing options if you would rather spread the cost.
Who to Contact
King County. Reach the Permitting Division at 206-296-6600 or PermitQuestions@kingcounty.gov. You can apply for permits, or check which jurisdiction your property actually falls under, at MyBuildingPermit.com.
Snohomish County. Planning and Development Services (PDS) is at 425-388-3311, or 3000 Rockefeller Avenue, Everett, WA 98201. Applications are submitted online.
Or just ask us. We have been pulling roofing permits across King and Snohomish counties for over 40 years and we know how each office works. If you are unsure whether your project needs a permit, call us at (425) 643-0888 or request a free estimate. We will tell you straight, before you commit to anything.
The requirements summarized above reflect King County and Snohomish County guidance current as of August 2026 and apply to unincorporated areas. Cities within both counties set their own rules. Jurisdictions update their codes and fee schedules periodically — confirm with your permit office, or ask us and we will confirm it for your address.
