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Licensed Well and Septic Contractors: Coos County, NH

65 licensed well and septic pros based in Coos 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 NH DES - Septic System Designers & Installers, NHDES Permitted Septage Haulers and NH DES - Well Contractors & Pump Installers. Roster copy last refreshed 2026-08-16.

Need well or septic work quotes in Coos County? Request free quotes and we'll pass it to licensed well and septic pros who serve the area.

Towns in Coos County

All 19 towns named on the license records based here, with the number of listings in each, most first.

Colebrook 10 listings Lancaster 8 listings Milan 7 listings Berlin 6 listings Whitefield 5 listings Jefferson 4 listings Pittsburg 4 listings Gorham 3 listings Stewartstown 3 listings Dalton 2 listings Errol 2 listings North Stratford 2 listings Twin Mountain 2 listings Carroll 1 listing Clarksville 1 listing Columbia 1 listing Randolph 1 listing Stark 1 listing West Stewartstown 1 listing

License classes on the Coos 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 65.

License classTradeListings
Septic System InstallerSeptic37
Septic System Designer, Septic System InstallerSeptic11
Septage HaulerSeptic8
Pump InstallerWell3
Professional Engineer, Septic System DesignerSeptic2
Septic System DesignerSeptic2
Professional Engineer, Septic System Designer, Septic System InstallerSeptic1
Water Well ConstructionWell1

Septic Contractors based in Coos County (61)

Seth Quarrier, Licensed

Septic System Installation
Based in Gorham, NH · License #05407
On the NH DES roster as of 2026-08-16

Michael Lynch, Licensed

Septic System Installation
Based in North Stratford, NH · License #05285
On the NH DES roster as of 2026-08-16

Daniel Kenison, Licensed

Septic System Installation
Based in Lancaster, NH · License #04280
On the NH DES roster as of 2026-08-16

Kurt Masters, Licensed

Septic System Installation · Septic System Design
Based in Milan, NH · License #00114, 04189
On the NH DES roster as of 2026-08-16

Lee Rashkin, Licensed

Septic System Installation
Based in Dalton, NH · License #05846
On the NH DES roster as of 2026-08-16

Burke York, Licensed

Septic System Design
Based in Berlin, NH · License #01899
On the NH DES roster as of 2026-08-16

C.D.S. Portable Toilets

Septic Tank Pumping
Based in Colebrook, NH
On the NH licensing roster as of 2026-08-16

Cathy Conway, Licensed

Septic System Design
Based in Jefferson, NH · License #01053
On the NH DES roster as of 2026-08-16

David Chessman, Licensed

Septic System Installation · Septic System Design
Based in Lancaster, NH · License #01770, 03204
On the NH DES roster as of 2026-08-16

Bolens Septic & Portable Toilets LLC

Septic Tank Pumping
Based in Stewartstown, NH
On the NH licensing roster as of 2026-08-16

Jonathan Lane, Licensed

Septic System Installation
NH · License #05449
On the NH DES roster as of 2026-08-16

William Rioux, Licensed

Septic System Installation
Based in Clarksville, NH · License #05339
On the NH DES roster as of 2026-08-16

Christopher Guay, Licensed

Septic System Installation
Based in Milan, NH · License #05899
On the NH DES roster as of 2026-08-16

Daniel Garneau Sr, Licensed

Septic System Installation
Based in Carroll, NH · License #03778
On the NH DES roster as of 2026-08-16

Harley Mason Jr, Licensed

Septic System Installation
Based in Milan, NH · License #03727
On the NH DES roster as of 2026-08-16

Philip Beaulieu, Licensed

Septic System Installation · Septic System Design
Based in Whitefield, NH · License #01703, 05710
On the NH DES roster as of 2026-08-16

James Belknap, Licensed

Septic System Installation · Septic System Design
Based in West Stewartstown, NH · License #01586, 04324
On the NH DES roster as of 2026-08-16

JAL Enterprises LLC

Septic Tank Pumping
Based in Twin Mountain, NH
On the NH licensing roster as of 2026-08-16

William Turner, Licensed

Septic System Installation
Based in Lancaster, NH · License #04632
On the NH DES roster as of 2026-08-16

E. Wells, Licensed

Septic System Installation · Septic System Design
Based in Colebrook, NH · License #01134, 02379
On the NH DES roster as of 2026-08-16

Lawrence Kenison, Licensed

Septic System Installation
Based in Jefferson, NH · License #05293
On the NH DES roster as of 2026-08-16

Donald Doucette, Licensed

Septic System Installation
Based in Milan, NH · License #05646
On the NH DES roster as of 2026-08-16

Alan Savage, Licensed

Septic System Installation
Based in Lancaster, NH · License #02613
On the NH DES roster as of 2026-08-16

James Wheeler, Licensed

Septic System Design
Based in Milan, NH · License #01076
On the NH DES roster as of 2026-08-16

Roger Drouin, Licensed

Septic System Installation
Based in Berlin, NH · License #03251
On the NH DES roster as of 2026-08-16

Mark Vander-heyden, Licensed

Septic System Installation · Septic System Design
Based in Whitefield, NH · License #00681, 04084
On the NH DES roster as of 2026-08-16

Daniel Gray, Licensed

Septic System Installation
Based in Dalton, NH · License #05706
On the NH DES roster as of 2026-08-16

Robert Eich, Licensed

Septic System Installation · Septic System Design
Based in Stark, NH · License #01750, 05117
On the NH DES roster as of 2026-08-16

David Brunault, Licensed

Septic System Installation · Septic System Design
Based in Colebrook, NH · License #01136, 02727
On the NH DES roster as of 2026-08-16

Shawn White, Licensed

Septic System Installation
Based in Whitefield, NH · License #05685
On the NH DES roster as of 2026-08-16

Jon Cyr, Licensed

Septic System Installation · Septic System Design
Based in Columbia, NH · License #01690, 03534
On the NH DES roster as of 2026-08-16

Michael Gray, Licensed

Septic System Installation
Based in Jefferson, NH · License #03423
On the NH DES roster as of 2026-08-16

Clark Jeffers, Licensed

Septic System Installation
Based in Colebrook, NH · License #04356
On the NH DES roster as of 2026-08-16

Eric Ward, Licensed

Septic System Installation
Based in Errol, NH · License #05561
On the NH DES roster as of 2026-08-16

Raymond Dubreuil, Licensed

Septic System Installation
Based in Lancaster, NH · License #03528
On the NH DES roster as of 2026-08-16

Aaron Joos, Licensed

Septic System Installation
Based in Stewartstown, NH · License #05542
On the NH DES roster as of 2026-08-16

White's Septic Service LLC

Septic Tank Pumping
Based in Jefferson, NH
On the NH licensing roster as of 2026-08-16

Robert Brooks, Licensed

Septic System Installation
Based in Stewartstown, NH · License #03910
On the NH DES roster as of 2026-08-16

Jason Sullivan, Licensed

Septic System Installation
Based in Twin Mountain, NH · License #05436
On the NH DES roster as of 2026-08-16

Michael Rozek, Licensed

Septic System Installation
Based in Berlin, NH · License #04847
On the NH DES roster as of 2026-08-16

Walter Dorman, Licensed

Septic System Installation
Based in Pittsburg, NH · License #00073
On the NH DES roster as of 2026-08-16

Thomas Rozek, Licensed

Septic System Installation
Based in Berlin, NH · License #05668
On the NH DES roster as of 2026-08-16

David Blanchette, Licensed

Septic System Installation
Based in Errol, NH · License #04590
On the NH DES roster as of 2026-08-16

Leo Mackinnon, Licensed

Septic System Installation · Septic System Design
Based in Colebrook, NH · License #01149, 02898
On the NH DES roster as of 2026-08-16

Aaron Thayer, Licensed

Septic System Installation
Based in Colebrook, NH · License #05625
On the NH DES roster as of 2026-08-16

AAA Septic div Mikem Inc

Septic Tank Pumping
Based in Berlin, NH
On the NH licensing roster as of 2026-08-16

Aaron Arsenault, Licensed

Septic System Installation
Based in Whitefield, NH · License #05319
On the NH DES roster as of 2026-08-16

Glen Lucas, Licensed

Septic System Installation
Based in Lancaster, NH · License #05612
On the NH DES roster as of 2026-08-16

Scott Nash & Sons

Septic Tank Pumping
Based in Colebrook, NH
On the NH licensing roster as of 2026-08-16

Benjamin Lewis, Licensed

Septic System Installation
Based in Milan, NH · License #05681
On the NH DES roster as of 2026-08-16

Scott Nash, Licensed

Septic System Installation
Based in Colebrook, NH · License #03358
On the NH DES roster as of 2026-08-16

Anthony Gray, Licensed

Septic System Installation
Based in Lancaster, NH · License #04777
On the NH DES roster as of 2026-08-16

Donald Kohl, Licensed

Septic System Installation
Based in North Stratford, NH · License #05629
On the NH DES roster as of 2026-08-16

Michael Seraikas, Licensed

Septic System Design
Based in Colebrook, NH · License #01114
On the NH DES roster as of 2026-08-16

Lee Corrigan, Licensed

Septic System Installation
Based in Gorham, NH · License #05163
On the NH DES roster as of 2026-08-16

Warren Chase, Licensed

Septic System Installation · Septic System Design
Based in Pittsburg, NH · License #01319, 03239
On the NH DES roster as of 2026-08-16

Emily Swallow, Licensed

Septic System Installation
Based in Lancaster, NH · License #05689
On the NH DES roster as of 2026-08-16

Go Time Restrooms

Septic Tank Pumping
Based in Berlin, NH
On the NH licensing roster as of 2026-08-16

Michael Doucette, Licensed

Septic System Installation
Based in Milan, NH · License #05647
On the NH DES roster as of 2026-08-16

Brian Dorman, Licensed

Septic System Installation · Septic System Design
Based in Pittsburg, NH · License #01751, 04466
On the NH DES roster as of 2026-08-16

T.P. Toilets

Septic Tank Pumping
Based in Whitefield, NH
On the NH licensing roster as of 2026-08-16

Water Well Contractors based in Coos County (4)

COLEBROOK PLUMBING & HEATING, INC, Licensed

Well Pump Repair
Colebrook Plumbing & Heating, INC · Based in Colebrook, NH · License #623
On the NH DES roster as of 2026-08-16

ARNOLD PUMP, Licensed

Well Pump Repair
Arnold Pump · Based in Randolph, NH · License #1590
On the NH DES roster as of 2026-08-16

CURT'S WATER SOLUTIONS, Licensed

Well Pump Repair
Curt's Water Solutions · Based in Gorham, NH · License #2628
On the NH DES roster as of 2026-08-16

WALTER D DORMAN EXCAVATING & SON LLC, Licensed

Well Drilling
Walter D Dorman Excavating & Son LLC · Based in Pittsburg, NH · License #1867
On the NH DES roster as of 2026-08-16

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 Coos County, with national cost ranges

Listings based in Coos County whose license class covers each service. Cost ranges are national; each links its cost guide.

ServiceBased in Coos CountyNational cost
Septic Tank Pumping8$250 to $600
Septic System Installation49$3,600 to $12,500
Septic Inspection0$150 to $900
Septic System Design16Varies by site
Perc Test and Soil Evaluation0$250 to $1,000
Well Drilling1$5,500 to $35,000
Well Pump Repair3$1,000 to $2,500

None of the listings based in Coos County hold a license class we can match to septic inspection or perc test and soil evaluation. Ask any contractor whether they do this work, or try a nearby city.

Hiring a well and septic professional in Coos 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 New Hampshire?

Neighboring counties

Carroll County 189 listings Essex County, VT 5 listings Grafton County 214 listings Oxford County, ME 19 listings