---
title: "Gagnon Construction"
description: "Gagnon Construction is a Chelmsford builder whose website says Larry Gagnon has been building additions and remodeling homes for over twenty-five years. Th"
doc_version: "2026-11-03"
last_updated: "2026-11-03"
---

# Gagnon Construction

**Trade:** General Contractor / Remodeling · **Address:** 34 Bridge St, Chelmsford, MA 01824 · **Phone:** (978) 256-2086 · **Website:** http://gagnonconstruction.com/ · **Languages:** English

**Rating: 3.1/5** (low confidence) — from 1 reviews across 5 sources.

## The honest read

Gagnon Construction is a Chelmsford builder whose website says Larry Gagnon has been building additions and remodeling homes for over twenty-five years. The website lists a service area that includes Acton, Andover, Bedford, Billerica, Cambridge, Concord and Lexington.

In 2024, a customer said Gagnon installed a new roof at the price and product stated, and found previous work around the chimney that was a water access point and took care of it with minimal added cost.

Laurence Gagnon's Massachusetts home improvement contractor registration, number 108258, is expired on the state registry.

**Strengths:**
- A chimney leak point — a 2024 customer said it was fixed at minimal added cost

**Concerns:**
- Expired HIC registration — the state registry lists number 108258 as expired

## Claims & citations

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

- The website says Larry Gagnon has been building additions and remodeling homes for over twenty-five years _(confidence: medium)_
  - [Official Website](http://gagnonconstruction.com) — “About (self-reported, verbatim): Larry Gagnon, Gagnon Construction Company - Chelmsford, Ma, has been building additions and remodeling home…”
- A 2024 customer said Gagnon installed a new roof and fixed a water access point around the chimney _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUROcTlLd01BEAE!2m1!1s0x0:0x8e59a191e1d70121!3m1!1s2@1:CIHM0ogKEICAgIDNq9KwMA%7C%7C?hl=en) — “5★ I had a new roof installed by Gagnon and they did a great job. They delivered on the price and product as stated and were very profession…”
- Laurence Gagnon's Massachusetts home improvement contractor registration, number 108258, is expired on the state registry _(confidence: high)_
  - [State License Registry](https://contractorhub.mass.gov/s/hic-contractor-search) — “MA hic license 108258 registry-verified expired — registry holder of record: Laurence Gagnon”
- Google shows 5 stars from 3 ratings _(confidence: high)_
  - [Google](https://www.google.com/maps/search/?api=1&query=Gagnon%20Construction&query_place_id=ChIJHaMNWx-j44kRIQHX4ZGhWY4) — “Google: 5★ from 3 ratings”
- Specializes in General Contractor / Remodeling _(confidence: medium)_
  - [Official Website](http://gagnonconstruction.com) — “About (self-reported, verbatim): Larry Gagnon, Gagnon Construction Company - Chelmsford, Ma, has been building additions and remodeling home…”
- Also offers Roofing _(confidence: low)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUROcTlLd01BEAE!2m1!1s0x0:0x8e59a191e1d70121!3m1!1s2@1:CIHM0ogKEICAgIDNq9KwMA%7C%7C?hl=en) — “5★ I had a new roof installed by Gagnon and they did a great job. They delivered on the price and product as stated and were very profession…”

## License

Status: **expired** (#108258, hic) — verified against the official MA state registry on 2026-09-22, never self-reported.
Re-check at the official registry: https://contractorhub.mass.gov/s/hic-contractor-search

## Sources

- [Google Reviews](https://www.google.com/maps/search/?api=1&query=Gagnon%20Construction&query_place_id=ChIJHaMNWx-j44kRIQHX4ZGhWY4): Listed on this source
- [Official Website](http://gagnonconstruction.com): 25 yrs in business · Self-reported profile and service details
- [Exa](https://tj.news/fredericton-west/blasting-land-prep-next-to-farm-raises-questions-about-development): 0 web mentions across the open web (each linked to its source)
- [Better Business Bureau](https://www.bbb.org/us/ma/chelmsford/profile/general-contractor/gagnon-construction-company-0021-55500): Listed on this source
- [Google](https://www.google.com/maps/search/?api=1&query=Gagnon%20Construction&query_place_id=ChIJHaMNWx-j44kRIQHX4ZGhWY4): 5.0★ from 3 ratings

## Recent reviews

- **5/5 · Google Reviews · Chris Mahoney · 2024-01-26**: I had a new roof installed by Gagnon and they did a great job. They delivered on the price and product as stated and were very professional throughout the installation. I had a few other quotes from other companies that were higher than what Gagnon offered with little transparency on the cost. The g…

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Data freshness: last scanned 2026-09-22T23:28:26.523Z.
Cite as: Gagnon Construction — Tavlee (https://tavlee.com/contractor/gagnon-construction-chelmsford)
Source: https://tavlee.com/contractor/gagnon-construction-chelmsford

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