Do You Need a Permit to Replace a Roof in Washington?
The rule is different in each of the four counties we work in, and different again inside city limits. Here is the actual position, with sources.
The rule, county by county
King County
A full roof replacement requires a building permit. Washington’s state building code sets the requirement and each city’s building department enforces it, so the application goes to your city rather than to the county.
Source: kingcounty.gov — permits and inspections
Pierce County
Pierce County exempts re-roofing a house or private garage on a slope steeper than 2:12 when the total weight of all roof coverings stays at or below 7.5 pounds per square foot. The exemption does not apply if roof sheathing is replaced.
Source: Pierce County Code 17C.30.040, Work Exempt from Permit
Skagit County
Skagit County exempts replacing or overlaying one layer of residential roof covering — shingles, shakes or metal — where it complies with the Wildland-Urban Interface Code.
Source: Skagit County, Construction Exempt from Building Permit
Snohomish County
Snohomish County exempts a re-roof overlay from a permit when the roof ends up with no more than two total layers, and exempts a tear-off and replacement in the same type of material provided the roof sheathing is not removed. Replace any sheathing and the exemption ends.
Source: Snohomish County, Common Building Permit Exemptions
Read this before you rely on an exemption. County exemptions govern unincorporated areas. If your address is inside a city, that city adopts its own code and can be stricter than the county it sits in. Confirm with your city’s building department, or let us do it — we pull whatever the job needs.
Sheathing is what usually decides it
Both Snohomish and Pierce County tie their re-roof exemption to leaving the roof sheathing in place. That matters more than it sounds, because whether sheathing needs replacing is not knowable until the old roof is off.
So a job can start out looking exempt and stop being exempt at step four, when the deck is exposed and part of it turns out to be soft. That is normal, it is not a problem, and it is the reason we would rather handle permitting than have you assume you do not need one.
What a permit actually gets you
An inspection
Someone independent of the contractor looks at the work. On a roof, where almost everything is hidden once the shingles are on, that is worth more than it is on most trades.
A clean record
Permitted work shows up when the house is sold. Unpermitted work also shows up, and costs more to resolve then than it would have cost to permit at the time.
A contractor who is real
Pulling a permit requires an active license and bond. A contractor who avoids permits may be avoiding them for a reason worth knowing about.
Permit questions we get
Usually yes, and it depends on which county you are in and whether your address is inside city limits. Washington’s state building code sets the baseline and every city and county adopts and enforces its own version, which is why the answer genuinely differs across the four counties we work in.
We do. It is part of the job and it is not something you should be left to sort out. A contractor asking you to pull an owner-builder permit for work they are doing is worth asking hard questions about — it can shift liability onto you.
It usually surfaces when you sell. An unpermitted reroof can hold up a sale, and the buyer’s side may ask for a price reduction or for it to be brought into compliance retroactively, which is far more expensive than permitting it at the time.
In Snohomish and Pierce counties, yes — and it is the single most common way a job that looked exempt stops being exempt. Both counties tie their re-roof exemption to leaving the roof sheathing in place.
We handle the permit
It is part of the job, not an errand we hand back to you. Book a free inspection and we will tell you what your address needs.