Do I Need aBuilding Permit?
Not sure if that fence, shed, or basement remodel needs a permit in Washington? We built this tool so you don't have to open multiple tabs and get five different answers.
Check your project
Answer a few quick questions to get an instant read on your permit requirements.
100%
Results include a cited source
FREE
No cost to use, no sign-up
39
All WA Counties Covered
How it Works
Three simple steps to get a clear answer about your project.
Start with your ZIP code
Tell us where the project is
Enter the property ZIP code so we can identify the jurisdiction that actually issues the permit, whether that's the city or county.
Pick your project
Choose from 16 project types
Select your project and answer a few quick questions about the scope. We check the applicable Washington residential code, including local amendments and jurisdiction-specific requirements.
Get your answer
A clear, cited verdict
Get a yes, no, or maybe in under a minute, backed by the jurisdiction's current code or building department guidance. Every result names its source, so you can verify the answer yourself.
Who This Tool Is For
Straight answers for anyone who needs them, not just homeowners.
Homeowners
Planning a remodel, addition, or deck? Find out if you need a permit, what it involves, and what it's likely to cost.
Contractors
Bidding a job in an unfamiliar city? Get a fast, cited read on exemption thresholds and fees before you quote it.
Real Estate Investors
Planning a renovation? Check whether it may require a permit before making investment decisions or recommending improvements to your clients.
Agents & Flippers
Advising a client on renovation ROI before a flip? Get source-cited permit requirements and the right filing path, not a guess.
Built by Permit Specialists
Evergreen Permits is a Washington-based team of architectural designers and permit specialists. We've helped turn 200+ residential projects into approved, permit-ready plans across the state, from ADUs and additions to remodels and structural alterations.
This tool uses the same research we do every day for our clients: the same codes, the same jurisdiction-by-jurisdiction verification, made free and instant. Need help filing after you get your answer? That's what we do for a living.
Found Out You Need a Permit? Curious What the Fee Will Cost?
We built a separate calculator for that. It estimates typical Washington State permit costs by project type and jurisdiction, so you can budget before you apply.
Calculate Your Fee
Frequently Asked Questions
It depends on the type and scope of your project, as well as where the property is located. Our tool helps you quickly find out whether your project may require a building permit.
Projects involving structural changes, additions, new living space, egress, and certain electrical or plumbing work often require permits. Smaller cosmetic projects may be exempt. Check your specific project before you start.
Not every remodel requires a building permit. Cosmetic updates may not, while changes to structure, layout, egress, or regulated systems often do. Use the tool to check your project.
Some decks may be exempt depending on their size, height, location, and other requirements. Enter your project details to find out whether a permit may be required.
Unpermitted work can lead to inspections, correction requirements, additional fees, delays, and problems when selling or refinancing a property. Checking permit requirements before work begins can help you avoid these issues.
Yes. If your project requires a permit, Evergreen Permits can help with the permit drawings, application, submittal, and review process from start to approval. Get a Free Consultation →