The Pacific Northwest Wet Season: a Home Plan for Months of Rain

A freeze is an event and a hurricane is an event. A Northwest wet season is neither: it is a long stretch in which every weakness in the drainage of a house is tested repeatedly, and in which nothing gets a chance to dry out between tests. That changes what preparation means and it changes which failures are expensive.

One honest note before the advice. NOAA publishes exact start and end dates for the hurricane season, and the National Weather Service publishes them for the Southwest monsoon. We have not found an agency that publishes an official start and end date for a Pacific Northwest wet season in the same way, so this guide does not give you one. The practical trigger is the first sustained rain of the autumn, and the work below belongs before it.

What a wet season does that a rainstorm does not

• It removes the drying window. The EPA states the rule that governs every water problem in a house: if wet or damp materials are dried 24 to 48 hours after a leak or spill, in most cases mold will not grow. In a climate where the next rain arrives inside that window, a slow leak never gets its 48 hours. The same leak that would dry out in Phoenix compounds here.
• It finds every drainage shortcut. Blocked gutters, downspouts that discharge against the foundation, ground graded towards the house, a crawl space with no working sump, and a roof valley full of needles are all survivable in a dry month. Over a season they are the whole problem.
• It moves water into places that hold electricity. Wet crawl spaces, damp panels, outdoor circuits and pumps are electrical work, not plumbing work, and the two get confused in exactly the moment when getting them right matters.

Before the rain settles in

1. Clear the gutters and check where the downspouts actually end. Water that leaves the roof cleanly and then soaks the foundation has not been drained, it has been moved.
2. Test the sump pump, if there is one, and know what happens when the power goes out. A pump that works on mains power during a wind storm that takes the power out is a pump that does not work.
3. Walk the crawl space or basement with a torch, dry. Note the standing water lines, the rusted supports, the sagging vapor barrier, and the smell. Photograph it now so you can tell in February whether it got worse.
4. Find the main water shut-off and prove it turns. A valve that has not moved in ten years frequently will not move on the night you need it.
5. Check the outdoor electrical. Covers on outlets, GFCI protection where it belongs, and nothing extension-corded across a wet path. This is an electrician's question and worth asking one in September rather than in January.
6. Decide who you would call, and check them now. The rest of this page is about that step.

What Washington lets you check

Washington runs one of the more informative registers in the country. The L&I Verify tool confirms that a contractor has posted a minimum bond and purchased liability insurance, and that their registration hasn't been suspended by L&I . You can search by name, license, workers' compensation account or UBI number.

L&I put the wet-season version of the argument in writing after the December 2025 floods. Its warning about flood-repair contractors notes that unregistered "contractors" are usually working without a bond. If they do substandard work or fail to finish the job, it leaves the homeowner with even more problems, and that as tempting as it is to go with the first - or the cheapest - contractor, it is crucial to check their background before you hire. The full walk-through is in verifying a Washington contractor's license.

What Oregon lets you check, and why it is two lookups

Oregon splits one credential across two agencies, which is the single most common reason an Oregon check comes back looking incomplete. The Building Codes Division licenses the trade - that is the number on a plumbing or electrical listing - and the Construction Contractors Board registers the business and carries its bond and insurance. So a complete Oregon check is the BCD license holder search plus the CCB search. Details: verifying an Oregon contractor's license.

The CCB's own consumer guide is blunt about the scope of the requirement - contractors must be licensed in Oregon to do most all construction work - and lists what a licensed contractor brings that an unlicensed one does not: liability insurance covering damage to your property, workers' compensation cover if the contractor has employees, a bond available to a customer who suffers damage from poor workmanship, access to CCB mediation in a dispute, and a record of past sanctions or claims you can look at. Against an unlicensed contractor it lists the mirror image, including no source (bond) to reimburse you for poor workmanship and cannot pull required building permits.

The guide also warns about the arrival pattern that follows any storm: do not be pressured by contractors who solicit door-to-door. That applies here in the same way it applies on the Gulf coast - hiring a contractor after a storm is the longer version.

What we cover in these two states, plainly

We list plumbing, electrical, HVAC and pest control companies in Washington, and plumbing and electrical companies in Oregon, because those are the trades whose credentials these two states publish in a form we can match against. We do not list roofing or gutter companies in either state, so if that is what your wet season needs, this directory is not where to start - the state lookups above are.

Where we can help: plumbers in Seattle, electricians in Tacoma, plumbers in Portland, electricians in Eugene, or the hubs for Washington and Oregon. Every listing carries the number the state issued and the date we last checked it; how we verify sets out the rules.