GroundRosterLicensed Well and Septic Contractors: Washington County, OR
27 licensed well and septic pros based in Washington County. Every license number below is sourced from public licensing records, with a link to look it up yourself.
Grouped by the county of the address on each license record, which can be a mailing address, so it doesn't tell you where the business works. When the record names no county, we place it by ZIP code, then town.
Checked against Oregon DEQ - Sewage Disposal Service Licensed Businesses and Oregon Water Resources Department - licensed well constructors. Roster copy last refreshed 2026-08-17.
Towns in Washington County
All 9 towns named on the license records based here, with the number of listings in each, most first.
License classes on the Washington County records
Each class as the issuing agency prints it on the license record. A record that names more than one class counts once under each, so the rows can add up to more than 27.
| License class | Trade | Listings |
|---|---|---|
| Septic Installer | Septic | 16 |
| Septic Installer & Pumper | Septic | 5 |
| Septic Pumper | Septic | 3 |
| Water Well Constructor | Well | 2 |
| Water & Monitoring Well Constructor | Well | 1 |
Septic Contractors based in Washington County (24)
Insight Sanitary Services, LLC
The Excavators LLC
Hollenbach & Hurd, Inc.
Renner Trucking & Excavating, Inc.
Bell Construction Inc., dba Aloha Sanitary
Integrity, Inc
Sewer Renewal Specialists LLC, dba Plumbing & Sewer Renewal Specialists
Precision Earthworks, LLC
HPS Construction, Inc.
Verboort Construction, LLC
FLOz INC., dba FLOz
Scott Tankersley Excavation LLC
Kingdom Construction & Consulting LLC, dba Insight Sanitary Services
Sunrise Portables, LLC
Cse LLC
Bettinelli Construction, LLC, dba Bettinelli Excavation
Pihl Inc.
Alpha Environmental Services, Inc
On Demand Excavation LLC
West Side Drain Company, dba Noble Septic Service
Huson Excavation & Tree Service, LLC
Chehalem Ridge Excavating, LLC
Horner Brothers Construction LLC
Subcom Excavation & Utilities, LLC
Water Well Contractors based in Washington County (3)
Pli Systems INCLicensed
Alpine ResourcesLicensed
Alpine Resources LLCLicensed
Own one of these businesses? Find your listing and claim it.
Looking for a specific contractor? Search by name, business name, or license number.
Services in Washington County, with national cost ranges
Listings based in Washington County whose license class covers each service. Cost ranges are national; each links its cost guide.
| Service | Based in Washington County | National cost |
|---|---|---|
| Septic Tank Pumping | 8 | $250 to $600 |
| Septic System Installation | 21 | $3,600 to $12,500 |
| Septic Inspection | 0 | $150 to $900 |
| Septic System Design | 0 | Varies by site |
| Perc Test and Soil Evaluation | 0 | $250 to $1,000 |
| Well Drilling | 3 | $5,500 to $35,000 |
| Well Pump Repair | 0 | $1,000 to $2,500 |
None of the listings based in Washington County hold a license class we can match to septic inspection, septic system design, perc test and soil evaluation or well pump repair. Ask any contractor whether they do this work, or try a nearby city.
Hiring a well and septic professional in Washington County
Before you sign anything: confirm the license on this page is still active with the agency that issued it, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.
Do I need a permit for well or septic work in Oregon?