Washington does not license general contractors, it registers them, and RCW 18.27.080 says an unregistered contractor cannot bring an action for payment or even for breach of contract. The test is a single date, the date you contracted. What makes Washington different from every other state on this topic is that it writes a substantial-compliance escape into the statute itself, and then gates it on something most contractors do not expect: whether your bond and your insurance were in force the whole time.
This guide is Washington only. It is general guidance, not legal advice.
Registration, not licensing
RCW 18.27.020(1) is one line: every contractor shall register with the department. That is L&I, and the whole regime lives in RCW 18.27, the Contractor Registration Act. If you are looking for a Washington general contractor "license", you are looking for something the state does not issue.
What counts as a crime, and how fast it multiplies
RCW 18.27.020(2) makes it a gross misdemeanor for a contractor to:
- Advertise, offer to do work, submit a bid, or perform any work as a contractor without being registered.
- Do any of those while the registration is suspended or revoked.
- Use a false or expired registration number in purchasing or offering to purchase advertising that requires one.
- Transfer a valid registration to an unregistered contractor, or let an unregistered contractor work under a registration issued to another contractor.
- ⭐ Subcontract to or use an unregistered contractor.
That last one is the one general contractors miss. In Washington, putting an unregistered sub on your job is not merely a commercial risk, it is inside the same criminal subsection as being unregistered yourself.
⚠️ And the counting is brutal. Under RCW 18.27.020(5), once you have received a citation from the department, you commit a separate gross misdemeanor for each day you work while unregistered, suspended or revoked, or under someone else's registration. You also commit a separate gross misdemeanor for each worksite on which you violate the subsection. Exposure scales with days and with sites, not with the job.
The safe harbor for hiring subs, and its edge
RCW 18.27.020(3) gives a registered contractor a defense worth knowing precisely: it is not unlawful to employ an unregistered contractor who was registered at the time they entered into the contract with you, unless L&I has notified you in writing that the contractor has become unregistered.
So the check is at the point of contracting, and the thing that removes your protection is a written notification from the department. Verify at contract signing, keep the record, and treat any L&I letter about a sub as urgent rather than administrative.
There is also a tail after a conviction. RCW 18.27.020(6) requires the director to run a two-year audit and monitoring program for a previously unregistered contractor who registers after an infraction or conviction, and to notify the Departments of Revenue and Employment Security, who then look at whether any taxes, fees or penalties are owed. One licensing problem becomes three agencies.
The bar on suing, and why it is wider than most
RCW 18.27.080 is titled "Registration prerequisite to suit", and it blocks more than the other states on this topic do.
No person engaged in the business or acting in the capacity of a contractor may bring or maintain any action for the collection of compensation for the performance of any work or for breach of any contract for which registration is required, without alleging and proving that they were a duly registered contractor and held a current and valid certificate of registration at the time they contracted for the work or entered into the contract.
Two things follow.
It is not only about your invoice. California and Arizona bar an action for the collection of compensation. Washington adds breach of contract, so the claim you might have brought for something other than money is caught too.
It is a single date. "At the time he or she contracted" is one moment, like Florida. A registration that lapses later in the job does not fail this limb on its own.
The substantial-compliance gate, and the two words that decide it
This is the part worth the page.
Unlike North Carolina, which rejected substantial compliance by name, and unlike California, where the doctrine is open only to someone who was previously licensed, Washington writes the test into the statute. But it is written as a prohibition: the court shall not find a contractor in substantial compliance unless all three of the following are true.
| Limb | Requirement | Timing |
|---|---|---|
| 1 | The department has on file the information required by RCW 18.27.030 | On file |
| 2 | The contractor has had in force a current bond or other security under RCW 18.27.040 | At all times |
| 3 | The contractor has had in force current insurance under RCW 18.27.050 | At all times |
Read the timing column. The registration itself is the thing that lapsed, and the statute is willing to look past that. What it will not look past is a gap in the bond or the insurance, because those two limbs say at all times.
The court is also directed to take into account how long the contractor went without a valid certificate of registration. So a short lapse with the bond and insurance intact is a very different case from a long one, or from one where the bond went too.
⭐ The practical upshot: in Washington, your bond and insurance records are the evidence that decides whether a registration lapse costs you the claim. If a renewal has slipped, the first thing to establish is whether the bond and the policy ran continuously through it.
Does the small-job exemption save me?
RCW 18.27.090(9) exempts work on one undertaking or project where the aggregate contract price for labor, materials and all other items is less than $500, treated as casual, minor or inconsequential.
It fails on the same three things California's version does:
- Where the work is only part of a larger or major operation, whether by the same or a different contractor.
- Where the operation is divided into sub-$500 contracts to evade the chapter or otherwise.
- Where the person advertises or puts out any sign, card or other device indicating to the public that they are a contractor or qualified to be one.
$500 is a low bar by modern standards, and Washington has not moved it the way California moved its $500 to $1,000 in 2025. Treat the exemption as covering almost nothing.
What this means in practice
- Register before you advertise or bid, not before you start work. Advertising and bidding are both in RCW 18.27.020(2)(a).
- Never put an unregistered sub on a job. It is a gross misdemeanor for you, not just for them.
- Check a sub's registration at contract signing and keep the record, because that is the moment RCW 18.27.020(3) protects.
- Keep the bond and the insurance running through everything. They are what the substantial-compliance test is actually measuring.
- If you have been cited, stopping matters immediately, because each further day and each further site is a separate count.
Common questions
Can an unregistered contractor sue for payment in Washington?
No. RCW 18.27.080 bars an action for the collection of compensation, and also for breach of any contract, unless the contractor alleges and proves it was duly registered and held a current valid certificate of registration at the time it contracted for the work.
Does Washington license or register general contractors?
It registers them. RCW 18.27.020(1) requires every contractor to register with the Department of Labor and Industries. There is no statewide general contractor license to obtain, so a search for one will not find anything.
Can substantial compliance save an unregistered Washington contractor?
Sometimes, and the statute sets the test. Under RCW 18.27.080 a court shall not find substantial compliance unless the required information is on file, the bond has been in force at all times, and the insurance has been in force at all times. The court also weighs how long registration lapsed.
Is hiring an unregistered subcontractor illegal in Washington?
Yes. RCW 18.27.020(2)(e) makes it a gross misdemeanor to subcontract to or use an unregistered contractor. There is a safe harbor in subsection (3) if the sub was registered when they contracted with you, unless L&I has notified you in writing that they became unregistered.
How do penalties add up for unregistered contracting in Washington?
Quickly. Under RCW 18.27.020(5), after you receive a citation from the department each day worked while unregistered, suspended or revoked is a separate gross misdemeanor, and each worksite where you violate the subsection is a separate gross misdemeanor as well.
Is small work exempt from contractor registration in Washington?
Only under $500. RCW 18.27.090(9) exempts work whose aggregate contract price for labor, materials and everything else is less than $500 and is casual, minor or inconsequential. It fails if the work is part of a larger operation, if contracts were split to evade, or if you advertise as a contractor.
Where these figures come from
Every statutory quotation on this page was read directly from app.leg.wa.gov on 2 August 2026. No mirror and no reader proxy was involved.
| Provision | Subject | Retrieved |
|---|---|---|
| RCW 18.27.020 | Registration required; prohibited acts; criminal penalty; monitoring | 2 Aug 2026 |
| RCW 18.27.080 | Registration prerequisite to suit, and the substantial-compliance test | 2 Aug 2026 |
| RCW 18.27.090(9) | The under-$500 casual, minor or inconsequential exemption | 2 Aug 2026 |
RCW 18.27.030, .040 and .050, referenced by the substantial-compliance test for the filing, bond and insurance requirements, are named on this page but their detailed contents were not pulled. Check them at the source before relying on a bond amount.
The honest bit
Washington's regime is statutory and unusually explicit, which makes it easier to state than most. What it does not tell you is how a court will weigh the length of a lapse, which RCW 18.27.080 leaves to judgment. If a registration gap overlaps a job where money is owed, the useful work is gathering the bond and insurance history across that period before anything else, and putting it in front of a Washington construction attorney.
Related: California section 7031: when a customer can take back every dollar · Florida unlicensed contracting: what it costs you · North Carolina unlicensed contracting · Arizona unlicensed contracting: the two dates · What happens if you work without a contractor's license · Contractor License Checker
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Templates you might need
Sources
- RCW 18.27.080 - Registration prerequisite to suit · Registration at the time of contracting is a prerequisite to bringing or maintaining any action for the collection of compensation, and Washington's statutory substantial-compliance test sits in the same section
- RCW 18.27.020 - Registration required · Every contractor shall register, and it is a gross misdemeanor to advertise, offer to do work, submit a bid or perform work as a contractor without being registered
- RCW 18.27.090 - Exemptions · The under-$500 aggregate exemption at 18.27.090(9), for casual, minor or inconsequential work, and the advertising condition that defeats it
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