GroundRosterLicensed Well and Septic Contractors: Washington County, ID
8 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 Idaho IDWR - Licensed Well Drillers and Idaho DEQ - Permitted Subsurface Sewage Disposal System Installers. Roster copy last refreshed 2026-10-17.
Towns in Washington County
All 3 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 8.
| License class | Trade | Listings |
|---|---|---|
| Permitted Septic Installer - Complex System Installer | Septic | 3 |
| Permitted Septic Installer - Standard/Basic Installer | Septic | 3 |
| Licensed Well Driller | Well | 2 |
Septic Contractors based in Washington County (6)
A3 UndergroundLicensed
Backhoe and Concrete Works, LLC.Licensed
Upgrade Excavation, Inc.Licensed
Kim Braun Construction ServicesLicensed
Advanced Terrain DesignLicensed
DD Fairchild ExcavationLicensed
Water Well Contractors based in Washington County (2)
Langer Drilling & Pump LLCLicensed
Pearson Well DrillingLicensed
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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 | 0 | $250 to $600 |
| Septic System Installation | 6 | $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 | 2 | $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 tank pumping, 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 Idaho?