GroundRosterLicensed Septic Contractors: Williams County, ND
37 licensed septic contractors based in Williams 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 North Dakota DEQ - Licensed Septic System Installers. Roster copy last refreshed 2026-08-17.
Towns in Williams County
All 3 towns named on the license records based here, with the number of listings in each, most first.
License classes on the Williams 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 37.
| License class | Trade | Listings |
|---|---|---|
| Licensed Septic System Installer | Septic | 37 |
Septic Contractors based in Williams County (37)
KDW ConstructionLicensed
Lakeside Builders United, LLCLicensed
BG ExcavationLicensed
JMAC ResourcesLicensed
Joe's Digging Service, Inc.Licensed
Advent PlumbingLicensed
Straight Shot EnterpriseLicensed
WBP ContractingLicensed
Folden GradingLicensed
Goebel ConstructionLicensed
Enywhey Services LLCLicensed
Black's Well ServiceLicensed
Alpha Septic and Sewer IncLicensed
Stateline ServicesLicensed
High Plains Excavating LLCLicensed
All Source PlumbingLicensed
W-5 Excavation, Inc.Licensed
Scully Design Build, IncLicensed
Clark and Sons EarthworksLicensed
Cody Echevarria Construction LLCLicensed
Kent's Plumbing and Heating LLCLicensed
JTI IncLicensed
TERAflex Group, LLCLicensed
Agri Industries, Inc.Licensed
Coreys Septic ServiceLicensed
High Plains Excavating LLCLicensed
Neset Consulting Service, IncLicensed
Black Diamond SolutionsLicensed
Next Level Fencing and Excavation LLC.Licensed
Triple I ContractingLicensed
Above the Level Plumbing LLCLicensed
Genin LLCLicensed
Peter & Sons Excavation LLCLicensed
Braaten PlumbingLicensed
Land Restoration SpecialistsLicensed
Jim's Bobcat ServiceLicensed
Prairie Winds Services, 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 Williams County, with national cost ranges
Listings based in Williams County whose license class covers each service. Cost ranges are national; each links its cost guide.
| Service | Based in Williams County | National cost |
|---|---|---|
| Septic Tank Pumping | 0 | $250 to $600 |
| Septic System Installation | 37 | $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 |
None of the listings based in Williams County hold a license class we can match to septic tank pumping, septic inspection, septic system design or perc test and soil evaluation. Ask any contractor whether they do this work, or try a nearby city.
Hiring a septic contractor in Williams County
Septic (onsite wastewater) contractors handle everything from routine septic tank pumping and cleaning to repairs, inspections, and new system installation. States license each role separately (a pumper is not necessarily licensed to install, and vice versa), so match the license class to the job.
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 North Dakota?