Washington · Penalties in every state · What needs no permit here
Building without a permit in Washington
By Mario Bailey Last checked · 3 official sources
Quick answer
Washington has no statewide fine for building without a building permit. The State Building Code Act, RCW 19.27, hands enforcement to local government: RCW 19.27.050 requires the state building code to be enforced by counties and cities, so stop work orders and fines for unpermitted construction come from your city or county ordinance, not from a state statute.
Source: RCW 19.27.050; RCW 19.28.131; WAC 296-46B-915(11); RCW 18.106.020(3); RCW 18.106.270(1). Details and the official text are cited below.
What Washington law says
Washington has no statewide fine for building without a building permit. The State Building Code Act, RCW 19.27, hands enforcement to local government: RCW 19.27.050 requires the state building code to be enforced by counties and cities, so stop work orders and fines for unpermitted construction come from your city or county ordinance, not from a state statute. Electrical work is the big exception. In most of Washington, electrical permits run through the state Department of Labor and Industries under RCW 19.28, and L&I's civil penalty schedule sets $250 for a first offense of starting electrical work without a permit, $1,000 for a second offense, and $2,000 for each offense after that, with each day on a job site potentially counted as a separate offense (WAC 296-46B-915(11)). Behind that schedule, state law authorizes penalties from $50 up to $10,000 per violation of the electrical installation and licensing sections, and L&I may double a scheduled amount up to $10,000 for serious violations (RCW 19.28.131; WAC 296-46B-915). Plumbing is state regulated too: doing plumbing trade work without the required certificate is an infraction with a minimum penalty of $100 for an individual and $500 for a contractor, rising to as much as $5,000 for repeat infractions (RCW 18.106.020, 18.106.270).
Cited from RCW 19.27.050; RCW 19.28.131; WAC 296-46B-915(11); RCW 18.106.020(3); RCW 18.106.270(1): official text. Localities enforce these rules and may add their own fees and procedures on top.
Can you get a permit after the work is done?
There is no statewide after the fact building permit program in Washington, and no state statute or rule sets an investigation fee for unpermitted construction. RCW 19.27.050 delegates enforcement of the state building code to counties and cities, so whether old unpermitted work can be legalized with a retroactive permit, and what extra fees apply, is decided by your local building department under local ordinance. Electrical is different because the state runs that permit system: WAC 296-46B-901(5) requires the electrical work permit to be obtained and posted before any electrical work begins, with one narrow after the fact allowance for owners, who may buy the permit for emergency like in kind repairs to an existing system no later than the next business day after the work is begun. Buying the permit late outside that emergency window does not erase exposure to L&I's penalty schedule, and covering or concealing work before inspection carries its own penalty of $250 to $2,000 (WAC 296-46B-915(9) and (11)). L&I can also require dangerous or nonconforming wiring to be repaired within 15 days and can disconnect electrical service until it complies (RCW 19.28.101(3)).
Cited from RCW 19.27.050; WAC 296-46B-901(5); WAC 296-46B-915(9), (11); RCW 19.28.101(3): official text.
The typical path, whatever your locality calls it: stop any ongoing work, contact the permit office before they contact you, apply for the permit describing what was actually built, and expect the office to require opening up or inspecting concealed work. Voluntarily coming forward generally goes better than waiting for a complaint or a sale to surface it.
Who can pull the permit
Washington lets homeowners do their own construction work, including the licensed trades, on property they own. RCW 18.27.090(12) exempts any person working on his or her own property from contractor registration, but the exemption does not apply if you do contractor type work for the purpose of selling, demolishing, or leasing the property, and the separate owner exemption in RCW 18.27.090(11) is lost if you sell or lease improved property owned less than 12 months. For electrical work, RCW 19.28.261 lets you wire your own residence, farm, or place of business without an electrician license, unless the work is on construction of a new building intended for rent, sale, or lease, or on property offered for sale within 12 months after you obtained it. RCW 18.106.150(1) gives the same kind of exemption for plumbing work at your own residence, farm, or place of business. These exemptions waive the license, not the permit: an owner doing electrical work still buys an L&I electrical work permit and passes inspection (WAC 296-46B-901), and building and plumbing permits still come from your local building department.
Cited from RCW 18.27.090(11), (12); RCW 19.28.261(1); RCW 18.106.150(1): official text.
Was a permit needed in the first place?
Not every project needs one. Across the 8 Washington jurisdictions we have verified, 4 answered rules need no permit at all and 48 turn on a size or scope condition the jurisdiction publishes. If the work falls under one of those, the question changes from penalties to paperwork.
What you can build without a permit in Washington, jurisdiction by jurisdiction
Selling or buying in Washington?
How Washington compares: building without a permit, state by state.
See which parts of the work needed a permit, then send us the details
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From the Library
Your local permit office
Enforcement, after-the-fact fees, and the exact fix-it process are local. We cover these Washington permit offices:
Official sources
This page summarizes state law from the official sources listed above, with a last checked date. It is not legal advice. Penalties and procedures are applied by local offices and courts case by case; for anything contested or high stakes, confirm with your permit office or a licensed professional in Washington.