Licensed Septic Companies in Amherst, NH
9 septic companies serve Amherst, New Hampshire, and 9 of them hold a New Hampshire septic license or certification matched to the New Hampshire Department of Environmental Services, Subsurface Systems Bureau list (data as of October 2026).
Septic services in Amherst
Guides: Septic system installation · Installation cost · Pumping cost
9 septic companies in Amherst
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Dennis Wheeler Excavating, Inc.
71 Amherst St, Amherst, NH 03031 · Hillsborough County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #00446 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
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Garrett Mayo
6 Horace Greeley Rd, Amherst, NH 03031 · Hillsborough County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05792 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
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Gifford Colburn
31 Old Nashua Road, Amherst, NH 03031 · Hillsborough County
- Licensed: New Hampshire NHDES Permitted Septic System Designer and Installer · #05317 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation · Perc testing
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J L Sickler Construction
166 Amherst St, Amherst, NH 03031 · Hillsborough County
- Licensed: New Hampshire NHDES Permitted Septic System Designer and Installer · #02696 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation · Perc testing
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Kevin Grassett
75 Merrimack Rd, Amherst, NH 03031 · Hillsborough County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #03052 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
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Marc G Vaillancourt
34 New Boston Rd, Amherst, NH 03031 · Hillsborough County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #04601 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
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Matthew Arel
3 Tech Cir, Amherst, NH 03031 · Hillsborough County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05520 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
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Bradford A Knight
21 Upham Rd, Amherst, NH 03031 · Hillsborough County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05141 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
No phone on the state list
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Ryan Arel
3 Tech Cir, Amherst, NH 03031 · Hillsborough County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05512 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
No phone on the state list
No listings match those filters.
Septic licensing in New Hampshire
New Hampshire requires a NHDES permit to design or install a septic system; the Subsurface Systems Bureau publishes the list of permitted designers and installers. The NH Department of Environmental Services, Subsurface Systems Bureau issues these credentials: Permitted installer (RSA 485-A:36); Permitted designer.
Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles Amherst and whether the permit fee is in their quote.
New Hampshire septic licensing: agencies, license types and how to check a license →
Septic companies in Amherst: common questions
How many licensed septic companies are in Amherst, NH?
9 septic companies serve Amherst, New Hampshire, and 9 of them hold a New Hampshire septic license or certification matched to the New Hampshire Department of Environmental Services, Subsurface Systems Bureau 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 New Hampshire?
New Hampshire requires a NHDES permit to design or install a septic system; the Subsurface Systems Bureau publishes the list of permitted designers and installers. The licensing body is the NH Department of Environmental Services, Subsurface Systems Bureau.
Which companies install septic systems in Amherst?
9 listings in Amherst install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their New Hampshire license.
How do I check a septic contractor's license in New Hampshire?
Use the NH Department of Environmental Services, Subsurface Systems Bureau's lookup (https://www.des.nh.gov/land/septic-systems/septic-designer-or-installer) and search the contractor's name or license number. Our guide to checking a septic license walks through it.