---
title: "Monadnock Septic Design LLC"
description: "Monadnock Septic Design LLC says it has been in business for 57 years. Its website lists a service area of Troy, Walpole, Westmoreland, Winchester, Hillsbo"
doc_version: "2026-09-30"
last_updated: "2026-09-30"
---

# Monadnock Septic Design LLC

**Trade:** Demolition & Excavation · **Address:** 86 Royalston Rd, Fitzwilliam, NH 03447 · **Phone:** (603) 585-2272 · **Website:** http://www.monadnocksepticdesign.com/ · **Languages:** English

**Rating: 3.4/5** (low confidence) — from 0 reviews across 3 sources.

## The honest read

Monadnock Septic Design LLC says it has been in business for 57 years.

Its website lists a service area of Troy, Walpole, Westmoreland, Winchester, Hillsborough, Amherst, Antrim, Greenfield, Greenville, Mason, Milford, New Ipswich, Peterborough and Wilton.

## Claims & citations

Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication.

- Self-reported 57 years in business _(confidence: medium)_
  - [Official Website](http://www.monadnocksepticdesign.com) — “Self-reported 57 years in business”
- Stated service area includes Troy, Walpole, Westmoreland, Winchester, Hillsborough, Amherst, Antrim, Greenfield, Greenville, Mason, Milford, New Ipswich, Peterborough and Wilton _(confidence: medium)_
  - [Official Website](http://www.monadnocksepticdesign.com) — “Stated service area (self-reported): Troy, Walpole, Westmoreland, Winchester, Hillsborough, Amherst, Antrim, Greenfield, Greenville, Mason, …”
- 5 stars from 1 Google rating _(confidence: high)_
  - [Google](https://www.google.com/maps/search/?api=1&query=Monadnock%20Septic%20Design%20LLC&query_place_id=ChIJP-Inoslo4YkRqtpOm51iL_g) — “Google: 5★ from 1 ratings”
- Specializes in Demolition & Excavation _(confidence: low)_
  - [Local News](https://www.keenesentinel.com/news/local/judge-denies-stoddard-selectmens-appeal-of-zoning-board-decision/article_badc99c4-fff9-54b4-a3d2-14eabcdb6814.html) — “keenesentinel.com — An August inspection report from Monadnock Septic Design stated that the tank showed no signs of degradation or septic f…”

## License

NH doesn't license or register this trade, so there's no state registry to check. That's true of every business in this trade, not specific to this one.

## Sources

- [Google](https://www.google.com/maps/search/?api=1&query=Monadnock%20Septic%20Design%20LLC&query_place_id=ChIJP-Inoslo4YkRqtpOm51iL_g): 5.0★ from 1 ratings
- [Official Website](http://www.monadnocksepticdesign.com): 57 yrs in business · Self-reported profile and service details
- [Local News](https://www.keenesentinel.com/news/local/judge-denies-stoddard-selectmens-appeal-of-zoning-board-decision/article_badc99c4-fff9-54b4-a3d2-14eabcdb6814.html): Listed on this source

## Mentions

Unverified third-party mentions found on the open web — relay with attribution ("a Reddit commenter said…"), never as Tavlee's own finding.

- “New Hampshire's Monadnock Septic Design Networks For Success” — onsiteinstaller.com — https://www.onsiteinstaller.com/editorial/2015/11/new_hampshires_monadnock_septic_design_networks_for_success
- “An August inspection report from Monadnock Septic Design stated that the tank showed no signs of degradation or septic failure.” — keenesentinel.com — https://www.keenesentinel.com/news/local/judge-denies-stoddard-selectmens-appeal-of-zoning-board-decision/article_badc99c4-fff9-54b4-a3d2-14eabcdb6814.html

---

Data freshness: last scanned 2026-09-29T21:58:34.487Z.
Cite as: Monadnock Septic Design LLC — Tavlee (https://tavlee.com/contractor/monadnock-septic-design-llc-fitzwilliam)
Source: https://tavlee.com/contractor/monadnock-septic-design-llc-fitzwilliam

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