Licensed Septic Companies in Corvallis, OR
9 septic companies serve Corvallis, Oregon, and 9 of them hold a Oregon septic license or certification matched to the Oregon Department of Environmental Quality list (data as of October 2026).
9 septic companies in Corvallis
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Blair Gamble Tractor Service
PO Box 995, Corvallis, OR 97339 · Benton County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #615 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Cascade Ground Works LLC
37141 Soap Creek Rd, Corvallis, OR 97330 · Benton County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3471 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3476 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Coleman Custom Builders
29157 Blake Dr., Corvallis, OR 97330 · Benton County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3679 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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ED Hughes Excavating
PO Box 1082, Corvallis, OR 97339 · Benton County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3358 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3362 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #627 (Oregon Department of Environmental Quality, verify)
- +3 more credentials
Per state license: Installation
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Groundhog LLC
7135 NW Valley View, Corvallis, OR 97330 · Benton County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #72 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Hughes Excavation
PO Box 1082, Corvallis, OR 97339 · Benton County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3718 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Kelci Free
4077 SW Research Way, Corvallis, OR 97333 · Benton County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3821 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Kevin Armstrong Excavating
971 NE Crane Ln, Corvallis, OR 97330 · Benton County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #93 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Red Hat Construction, Inc.
560 SW B Ave, Corvallis, OR 97333 · Benton County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #144 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
No listings match those filters.
Septic licensing in Oregon
Oregon licenses sewage disposal businesses and certifies the installers who work for them. The Oregon DEQ, Sewage Disposal Service licensing issues these credentials: Sewage disposal service license (installer, pumper); DEQ installer certification.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Corvallis and whether the permit fee is in their quote.
Oregon septic licensing: agencies, license types and how to check a license →
Septic companies in Corvallis: common questions
How many licensed septic companies are in Corvallis, OR?
9 septic companies serve Corvallis, Oregon, and 9 of them hold a Oregon septic license or certification matched to the Oregon Department of Environmental Quality list (data as of October 2026). Each license badge on this page names the agency and links to its lookup so you can confirm it.
Who licenses septic contractors in Oregon?
Oregon licenses sewage disposal businesses and certifies the installers who work for them. The licensing body is the Oregon DEQ, Sewage Disposal Service licensing.
Which companies install septic systems in Corvallis?
9 listings in Corvallis install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their Oregon license.
How do I check a septic contractor's license in Oregon?
Use the Oregon DEQ, Sewage Disposal Service licensing's lookup (https://www.oregon.gov/deq/permits/Pages/YDO-Public-Records.aspx) and search the contractor's name or license number. Our guide to checking a septic license walks through it.