---
title: "Radon Mitigation"
description: "A 2025 customer said radon in the house came down from about 12 pCi/l to about 1 pCi/l, and that the company worked to make the system as concealed as poss"
doc_version: "2026-10-19"
last_updated: "2026-10-19"
---

# Radon Mitigation

**Trade:** Remediation Services · **Address:** 21 Portland Reservoir Rd, Marlborough, CT 06447 · **Phone:** (860) 978-1513 · **Website:** http://www.radonabate.com/ · **Languages:** English

**Rating: 4.0/5** (medium confidence) — from 12 reviews across 5 sources.
92% of sentiment-scored reviews read net-positive. Last 6 months: 0 reviews, 0 negative.

## The honest read

A 2025 customer said radon in the house came down from about 12 pCi/l to about 1 pCi/l, and that the company worked to make the system as concealed as possible. Its 15 Google ratings average 4.7 stars.

The company's website describes it as family owned and says the business was started in April 2005 together with the writer's father, A. Douglas Thibodeau.

A 2025 customer said a mail-in test turned up a radon issue, and Mike fit them into his calendar, showed up on time and did the install. A 2025 customer said the quote included a licensed electrician to handle the switch installation. A 2025 customer praised the work Mike and his son did, inside and outside the house. In a 2024 review, a customer said the company followed up when the first fan motor had a problem and took care of it quickly.

A 2023 customer said their water was also tested for radon, and that licensed electrical work was included in the estimate. A 2023 customer described a father/son team installing a radon mitigation system in their home. A 2022 customer said Michael had the basement mitigated in one afternoon and left the workspace very clean.

In a 2021 review, a customer selling a home with high levels of radon in the water said Mike answered when they reached out around 11pm, found a day to install a double tank radon system, and took time to answer the buyer's questions.

A 2023 customer said the company refused to come back out to remedy a problem caused by its tanks, and that calls were either ignored or met with excuses.

Connecticut lists its home improvement contractor registration, HIC.0644308, as active, held by A Douglas Thibodeau LLC.

**Strengths:**
- Radon reduction — a 2025 customer said levels fell from about 12 to 1
- Fan motor follow-up — a 2024 customer said a fan problem was handled quickly
- A clean workspace — a 2022 customer said it was left very clean

**Concerns:**
- Return visit refused — a 2023 customer said a tank problem went unremedied

## Claims & citations

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

- A 2025 customer said radon came down from about 12 pCi/l to about 1 pCi/l after the system was installed _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnTUNJNXNyS0VREAE!2m1!1s0x0:0xae1178dfceaa267c!3m1!1s2@1:CIHM0ogKEICAgMCI5srKEQ%7C%7C?hl=en-US) — “5★ Polite and Professional. Worked to make the radon in air mitigation system as concealed as possible. Very informative about how the insta…”
- A 2021 customer said Mike installed a double tank radon system for radon in the water _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURHbDlqNVZREAE!2m1!1s0x0:0xae1178dfceaa267c!3m1!1s2@1:CIHM0ogKEICAgIDGl9j5VQ%7C%7C?hl=en-US) — “5★ During the selling of my home our home inspection indicated high levels of radon in our water.   I reached out to Mike around 11pm, as I …”
- A 2024 customer said the company followed up and quickly took care of a fan motor problem _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURkZ3RPalZBEAE!2m1!1s0x0:0xae1178dfceaa267c!3m1!1s2@1:CIHM0ogKEICAgIDdgtOjVA%7C%7C?hl=en-US) — “5★ Very responsive, reasonable price and fast service.  Followed-up when the first fan motor had a problem and took care of it quickly.  Hig…”
- A 2022 customer said the basement was mitigated in one afternoon and the workspace left very clean _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNlaS12WWZ3EAE!2m1!1s0x0:0xae1178dfceaa267c!3m1!1s2@1:CIHM0ogKEICAgICei-vYfw%7C%7C?hl=en-US) — “5★ Michael was super friendly, efficient, professional and well priced. He had my basement mitigated in one afternoon and the radon levels h…”
- A 2023 customer said the company refused to come back out to remedy a problem caused by its tanks _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURCdWM3TFhBEAE!2m1!1s0x0:0xae1178dfceaa267c!3m1!1s2@1:CIHM0ogKEICAgIDBuc7LXA%7C%7C?hl=en-US) — “1★ Refused to come back out to remedy a problem caused by their tanks. I called multiple times and either was ignored or given excuses. Very…”
- 4.7 stars from 15 Google ratings _(confidence: high)_
  - [Google](https://www.google.com/maps/search/?api=1&query=Radon%20Mitigation&query_place_id=ChIJAQB01Dpb5okRfCaqzt94Ea4) — “Google: 4.7★ from 15 ratings”
- Describes itself as family owned, started in April 2005 _(confidence: medium)_
  - [Official Website](http://www.radonabate.com) — “About (self-reported, verbatim): This is a family owned company that treats its customers with respect and provides the service you would ex…”
- Connecticut lists its home improvement contractor registration, HIC.0644308, as active, held by A Douglas Thibodeau LLC. _(confidence: high)_
  - [State License Registry](https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx) — “CT hic license HIC.0644308 registry-verified active — registry holder of record: A DOUGLAS THIBODEAU LLC”
- Specializes in Remediation Services _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnTUNJNXNyS0VREAE!2m1!1s0x0:0xae1178dfceaa267c!3m1!1s2@1:CIHM0ogKEICAgMCI5srKEQ%7C%7C?hl=en-US) — “5★ Polite and Professional. Worked to make the radon in air mitigation system as concealed as possible. Very informative about how the insta…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURSODVlVmd3RRAB!2m1!1s0x0:0xae1178dfceaa267c!3m1!1s2@1:CIHM0ogKEICAgIDR85eVgwE%7C%7C?hl=en-US) — “5★ This father/son team was extremely neat, professional and efficient! Can’t say enough. They installed a radon mitigation system in our ho…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNlaS12WWZ3EAE!2m1!1s0x0:0xae1178dfceaa267c!3m1!1s2@1:CIHM0ogKEICAgICei-vYfw%7C%7C?hl=en-US) — “5★ Michael was super friendly, efficient, professional and well priced. He had my basement mitigated in one afternoon and the radon levels h…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURXcnJhRnpnRRAB!2m1!1s0x0:0xae1178dfceaa267c!3m1!1s2@1:CIHM0ogKEICAgIDWrraFzgE%7C%7C?hl=en-US) — “5★ We recently had Radon Mitigation installed by Mike Thibodeau and are extremely pleased with the results! They arrived on time, clean, and…”

## Ownership

- Identifies as family-owned — the business's own statement, not independently verified.

## License

Status: **active** (#HIC.0644308, hic) — verified against the official CT state registry on 2026-10-19, never self-reported.
Re-check at the official registry: https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx

## Sources

- [Google Reviews](https://www.google.com/maps/search/?api=1&query=Radon%20Mitigation&query_place_id=ChIJAQB01Dpb5okRfCaqzt94Ea4): Listed on this source
- [Official Website](http://www.radonabate.com): Self-reported profile and service details
- [Local News](https://www.iowapublicradio.org/state-government-news/2026-04-29/radon-mitigation-systems-would-be-required-in-new-homes-under-bill-passed-by-the-senate): Listed on this source
- [Google](https://www.google.com/maps/search/?api=1&query=Radon%20Mitigation&query_place_id=ChIJAQB01Dpb5okRfCaqzt94Ea4): 4.7★ from 15 ratings
- [Reddit](https://www.reddit.com/r/radon/comments/1llhtzy/my_diy_radon_mitigation/): 0 community mentions discussing this business

## Recent reviews

- **5/5 · Google Reviews · Simone Sarmento · 2025-12-08**: Called this gentleman this morning. Very very helpful took the time out to explain things gave me reassurance about my situation. Very knowledgeable, answered promptly and spent a considerable amount of time explaining to us what we can and can’t do. I highly recommend Mike if you have any Radon pro…
- **5/5 · Google Reviews · Matt Gilbert · 2025-11-22**: Mike was great to work with. We discovered we had a radon issue through a mail in test. I called Mike and he was incredibly responsive and thorough with the options. He fit me in his calendar, showed up on time and did a great job with install. Very thankful to have called Mike
- **5/5 · Google Reviews · Connor Capizzano · 2025-05-21**: I cannot agree more with previous reviews about the quality of work provided by Mike and his son. Both individuals were knowledgeable and excellent to work with. Mike is very responsive and answered all my questions. The final result, both inside and outside of the house, was more than I could've ho…
- **5/5 · Google Reviews · Li Li · 2025-05-16**: Mike is incredibly knowledgeable and kind. His work is super neat and professional. The quote was very fair and even included a licensed electrician to handle the switch installation. I highly recommend his company — you won’t be disappointed!
- **5/5 · Google Reviews · Keegan Isles · 2025-04-01**: Polite and Professional. Worked to make the radon in air mitigation system as concealed as possible. Very informative about how the installed system works. Brought our house down from ~12pCi/l to ~1pCi/l, well below the actionable level.
- **5/5 · Google Reviews · Mark Boyer · 2024-02-21**: Very responsive, reasonable price and fast service.  Followed-up when the first fan motor had a problem and took care of it quickly.  Highly recommend.
- **5/5 · Google Reviews · Jay Ryan Kamins · 2023-06-27**: Knowledgeable, reasonably priced, friendly, responsive, and the quality of the work was outstanding. Answered all my questions patiently, provided an estimate that was spot on and did the work fast and super cleanly.

Also tested my water for radon and was ready for a solution if I needed it (we did…
- **5/5 · Google Reviews · Darcy Kurys · 2023-05-03**: This father/son team was extremely neat, professional and efficient! Can’t say enough. They installed a radon mitigation system in our home quickly and with a high level of skill. We need more contractors like this! Nice work guys.
- **1/5 · Google Reviews · Charles Daniels · 2023-01-23**: Refused to come back out to remedy a problem caused by their tanks. I called multiple times and either was ignored or given excuses. Very disappointed
- **5/5 · Google Reviews · Skye Ranze · 2022-09-23**: Michael was super friendly, efficient, professional and well priced. He had my basement mitigated in one afternoon and the radon levels have already dropped to really low numbers. He happily answered a dozen of my questions and left the workspace very clean when he was done for the day. Would highly…

---

Data freshness: last scanned 2026-10-14T10:29:54.853Z.
Cite as: Radon Mitigation — Tavlee (https://tavlee.com/contractor/radon-mitigation-marlborough)
Source: https://tavlee.com/contractor/radon-mitigation-marlborough

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