Licensed Septic Companies in Londonderry, NH
15 septic companies serve Londonderry, New Hampshire, and 15 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 Londonderry
Guides: Septic system installation · Installation cost · Pumping cost
15 septic companies in Londonderry
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Cheryl S Waitt
57 Noyes Road, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05804 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
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Kyle R Innie
20 Harvey Rd, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05854 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
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Michael Gagnon
118 Rockingham Rd, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05119 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05107 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
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R.J. Belanger Excavation
64 Chase Rd, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #01623 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
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Richard Innie Jr
20 Harvey Rd, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #03572 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
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Craig Hammel
13 Sheridan Dr, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05398 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
No phone on the state list
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Darren O'Donnell
28 Ross Drive, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05032 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
No phone on the state list
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Douglas Racca
8 Gillette Dr, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #04213 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
No phone on the state list
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Gary Hamm
2 West Road, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Designer and Installer · #00911 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation · Perc testing
No phone on the state list
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Jason D Reid
14 Wilson Rd, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #03612 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
No phone on the state list
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Jon Weigler
74 Page Rd, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #01822 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
No phone on the state list
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Joseph Maynard
50 Nashua Rd Ste 305, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Designer and Installer · #03185 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation · Perc testing
No phone on the state list
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Marc Fortin
574 Mammoth Rd, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #03452 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
No phone on the state list
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Mark Evans
9 Auburn Rd, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Installer · #05165 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation
No phone on the state list
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Michael Grainger
4 Watts Road, Londonderry, NH 03053 · Rockingham County
- Licensed: New Hampshire NHDES Permitted Septic System Designer and Installer · #05618 (New Hampshire Department of Environmental Services, Subsurface Systems Bureau, verify)
Per state license: Installation · Perc testing
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 Londonderry 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 Londonderry: common questions
How many licensed septic companies are in Londonderry, NH?
15 septic companies serve Londonderry, New Hampshire, and 15 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 Londonderry?
15 listings in Londonderry 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.