Roofing is one of the most common permit questions in Washington, and the confusion is understandable: there is no single statewide answer, because permitting is a local function.
What generally triggers a permit
Full tear-off and replacement usually requires one. So does anything involving structural work — replacing rafters or sheathing beyond a certain extent, altering the roof line, adding skylights or changing the roof structure to carry different loads.
Small repairs generally do not. Replacing a handful of damaged shingles, resealing a flashing detail or fixing a localised leak typically falls below the threshold.
The grey area is partial re-roofing, and this is precisely where the local threshold matters. Some jurisdictions set a percentage or square footage above which a permit is required. Your contractor should know the threshold for your address, and if they do not, that is worth noticing.
Who issues it
This is the part homeowners most often get wrong, particularly in King County where people assume a single county authority handles everything.
Inside Seattle, the Seattle Department of Construction and Inspections. Inside Bellevue, Kent, Renton, Tacoma, Everett, Spokane or any other incorporated city, that city’s own permit department. Only unincorporated areas go through the county.
The practical consequence is that timelines, fees and requirements differ between neighbouring addresses. A contractor who works across the county will know this; one who works mainly in one city may assume their usual process applies everywhere.
Who pulls it, and who pays
Establish both in writing before work starts. This is one of the most common sources of friction in roofing projects precisely because it is so often left unstated.
Generally you want the contractor pulling the permit. When a homeowner pulls a permit for work someone else performs, the homeowner takes on responsibility for compliance — which is not a position you want to be in for work you are not qualified to assess.
A contractor who suggests you pull the permit to save money is proposing to transfer risk to you. That is worth understanding before agreeing to it.
What the inspection gets you
Permits come with inspections, and homeowners often see this as an obstacle. It is closer to a free second opinion.
An inspector looks at work you are not qualified to evaluate, at the one moment it is visible. On a roof that means flashing, ventilation and underlayment detail — the elements that determine whether the roof performs, and the ones that disappear under the finished surface.
Skipping it
Unpermitted roofing turns up at sale, when a buyer’s inspector notices work that has no corresponding record. Resolving it then means retrospective permitting, and potentially opening up completed work so it can be inspected.
Insurers may also ask questions after a claim if work relating to the loss was never permitted. Neither situation arrives at a convenient moment, and both cost more than the permit would have.
The practical approach
Ask the contractor directly: is a permit required for this work at this address, who is pulling it, and is the cost in your quote? Get the answer in writing. If the answer is that no permit is needed, ask them to confirm that in writing too — which tends to concentrate the mind.