If you are dealing with mold in your home or business, you want a qualified professional who can remove it correctly and keep it from coming back. Below you will find independent mold remediation and removal companies serving communities across Oregon, along with plain-language guidance on state rules, renter and landlord responsibilities, and the standards a reputable remediator should follow. Our goal is to help you hire with confidence.
Select your city or region to see independent mold remediation companies that serve your area of Oregon.
Before you commit to removal work, we strongly recommend starting with an independent mold inspection and test. Because we do not perform remediation, our assessment is not tied to selling you a repair.
Mold Inspection & Testing (MI&T) provides mold inspection and laboratory testing only. We do not perform remediation, and we do not accept referral fees from the companies listed here. We offer this directory as a courtesy so Oregon property owners and renters can find local remediation professionals easily, then verify the work independently. Keeping assessment separate from removal helps ensure the scope of work matches the actual problem.
Oregon is a state of two very different moisture climates, and the western half is famously wet. West of the Cascade Mountains, the Pacific Ocean supplies abundant moisture and drives frequent precipitation from roughly October through May. According to the NOAA National Centers for Environmental Information State Climate Summary for Oregon, portions of the Coast Range receive more than 100 inches of precipitation a year, while some desert areas in the eastern part of the state receive less than 10 inches. That gap is one of the sharpest in the country.
For homes in Portland, the Willamette Valley, Eugene, the coast, and the Coast Range, the practical result is a long, cool, damp season. Persistent rain and high outdoor humidity keep building materials from drying out, and moisture collects in the places Oregon houses are known for: vented crawl spaces, basements, and poorly ventilated bathrooms and laundry areas. Mold needs only moisture, organic material, and time, and a months-long wet season supplies the first and third in abundance.
Eastern Oregon high-desert communities such as Bend and Pendleton are far drier, but no part of the state is immune. Plumbing leaks, roof and siding failures, ice-melt and snow, condensation on cold surfaces, and flood events can all create indoor moisture regardless of the outdoor climate. Wherever water lingers, mold can follow, which is why finding and fixing the moisture source is always the first step.
Here is the key point: Oregon does not license or certify mold assessors or mold remediators. There is no state-issued mold-specific credential, no mold exam, and no state mold license number to check. This surprises many homeowners, so it is worth stating plainly.
That does not mean the work is unregulated. Mold remediation that includes construction, repair, or improvement of a structure generally requires the contractor to be registered with the Oregon Construction Contractors Board (CCB), which is the state agency that oversees construction contractors. Because Oregon offers no mold-specific license to lean on, the burden shifts to you to vet a company carefully. We suggest confirming active CCB registration where construction work is involved, asking for proof of liability insurance and workers' compensation, and looking for voluntary industry certification and adherence to recognized remediation standards. Independent inspection and testing also gives you an objective benchmark that does not depend on any one contractor's claims.
Oregon's Residential Landlord and Tenant Act, found in ORS Chapter 90, sets out an implied warranty of habitability. Under ORS 90.320, a landlord must maintain a rental dwelling in a habitable condition at all times, which includes effective waterproofing and weather protection of the roof and exterior walls, plumbing maintained in good working order, and floors, walls, and ceilings kept in good repair. The statute does not name mold specifically, but the water intrusion, leaks, and disrepair that commonly cause mold can implicate these habitability duties.
Oregon law also sets out procedures and remedies. Tenants generally must give the landlord written notice of a problem and an opportunity to fix it, and remedies for a landlord's failure to maintain habitability appear in statutes such as ORS 90.360 and ORS 90.365. Both landlords and tenants benefit from documentation, and this is one reason an independent inspection and test can help: it creates a neutral, dated record of conditions and moisture sources that either party can rely on. The above is general information about Oregon law and is not legal advice; anyone weighing their rights or obligations should consult the statute directly or a qualified attorney.
Because Oregon has no mold license, the standards a company chooses to follow tell you a great deal. Reputable remediators work to the ANSI/IICRC S520 Standard for Professional Mold Remediation, which addresses containment, worker and occupant protection, moisture control, and verifying that remediation is complete. They also follow U.S. Environmental Protection Agency (EPA) guidance on mold cleanup and moisture control, and they reference American Industrial Hygiene Association (AIHA) resources for assessment and post-remediation verification. Ask any prospective contractor which standards they follow and how they confirm the job is finished.
Confirm the company holds active Oregon CCB registration where construction or repair is part of the job, and ask for current proof of general liability insurance and workers' compensation. Get it in writing.
Choose a contractor who follows the IICRC S520 standard and EPA guidance, who explains how they will contain the area and control the moisture source, and who provides a clear written scope and estimate.
An unbiased inspection and test defines the problem before you hire anyone. To arrange one in Oregon, visit https://moldinspectionandtest.com/oregon. Using an assessor who does not also sell removal keeps the diagnosis honest.
A good job ends with confirmation, not just a handshake. Ask how the contractor will verify success, and consider independent post-remediation testing so you have documentation the work was completed.
Use the city list on this page to reach independent mold remediation companies serving your part of Oregon, from Portland and the Willamette Valley to Bend, Medford, Eugene, and the coast. We suggest beginning with an independent inspection and test so your scope of work is based on documented conditions rather than a remediator's own estimate.
Oregon does not issue a dedicated state license or certification for mold assessment or mold remediation. However, remediation that involves construction, repair, or improvement of a structure generally requires the contractor to be registered with the Oregon Construction Contractors Board (CCB). Because there is no mold-specific credential, verifying CCB registration, insurance, and voluntary industry certification matters even more.
West of the Cascades, the Pacific delivers frequent precipitation from roughly October to May. Parts of the Coast Range receive more than 100 inches of precipitation a year, and cool, damp conditions persist for months. That long wet season keeps crawl spaces, basements, siding, and poorly ventilated rooms damp enough for mold to grow.
Oregon's Residential Landlord and Tenant Act requires landlords to keep a dwelling habitable under ORS 90.320, including effective waterproofing and weather protection and a structure kept in good repair. The statute does not name mold specifically, but water intrusion and disrepair that cause it can fall under habitability. Tenants generally must give written notice, and remedies are set out in statutes such as ORS 90.360 and 90.365. This is general information, not legal advice.
Look for companies that work to the ANSI/IICRC S520 Standard for Professional Mold Remediation, follow U.S. EPA mold guidance, and reference AIHA resources for assessment and clearance. These consensus standards cover containment, worker protection, moisture control, and verification that the work is complete.
We recommend it. An independent inspection and test identifies moisture sources and the extent of the problem, and it gives you documentation you can use to compare bids and confirm the job was finished. Because we only inspect and test, our findings are not tied to selling you removal work.
This page provides general information about Oregon law and conditions as of August 2026 and is not legal advice. Statutes and agency requirements change; verify current rules with the cited sources or a qualified professional before acting.
