Licensed Septic Companies in Sisters, OR
10 septic companies serve Sisters, Oregon, and 10 of them hold a Oregon septic license or certification matched to the Oregon Department of Environmental Quality list (data as of October 2026).
Septic services in Sisters
Guides: Septic system installation · Drain field repair · Installation cost · Pumping cost
10 septic companies in Sisters
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Barrier Excavation LLC
70693 Holmes Rd, Sisters, OR 97759 · Deschutes County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #426 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Joshua Talerico Excavating
PO Box 1090, Sisters, OR 97759 · Deschutes County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #873 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Olin Sitz Excavation
17425 Jordan Rd, Sisters, OR 97759 · Deschutes County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1172 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Olin Sitz Excavation, LLC
17425 Jordan Road, Sisters, OR 97759 · Deschutes County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #912 (Oregon Department of Environmental Quality, verify)
From their website: Installation · Drain field
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Ridgeline Contracting LLC
729 N Roundhouse Ct., Sisters, OR 97759 · Deschutes County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1032 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Robinson & Owen Heavy Construction
331 Barclay Dr., Sisters, OR 97759 · Deschutes County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3933 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Robinson & Owne Heavy Construction
PO Box 267, Sisters, OR 97759 · Deschutes County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3363 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #3355 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Tewalt & Sons Inc
14818 Bluegrass loop, Sisters, OR 97759 · Deschutes County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #4039 (Oregon Department of Environmental Quality, verify)
From their website: Installation
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Tewalt & Sons Inc.
447 E Jefferson Ave., Sisters, OR 97759 · Deschutes County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #4021 (Oregon Department of Environmental Quality, verify)
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #311 (Oregon Department of Environmental Quality, verify)
Per state license: Installation
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Troy Builders LLC
694 N Larch #83, Sisters, OR 97759 · Deschutes County
- Licensed: Oregon DEQ Certified Onsite (Septic) Installer · #1264 (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 Sisters and whether the permit fee is in their quote.
Oregon septic licensing: agencies, license types and how to check a license →
Septic companies in Sisters: common questions
How many licensed septic companies are in Sisters, OR?
10 septic companies serve Sisters, Oregon, and 10 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 Sisters?
10 listings in Sisters 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.