1st DeFense Radon Testing and Mitigation, LLC

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99% Recommended

10 Years In Business

Company Details

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9120 Hillside Trail South
Cottage Grove, MN 55016

Hours

Mon: Open 24 Hours
Tue: Open 24 Hours
Wed: 7:00 AM - 8:00 PM
Thu: Open 24 Hours
Fri: Open 24 Hours

Sat: 7:00 AM - 8:00 PM
Sun: Open 24 Hours

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Achievements

Service Details

Areas of Expertise

Radon Gas - Testing
Radon Gas - Abatement

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Cost Information

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Ratings

4.9

206 Verified Reviews

5

197
4

8
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1
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Showing 1-10 of 206 results

5.0 Dave W. Burnsville, MN

4/25/2026

Mitigate Radon Gas

1st Defense did a great job at a fair price.

5.0 Calvin L. Saint Paul, MN

1/26/2026

Mitigate Radon Gas

Steve was very knowledgeable and takes pride in his work. I highly recommend him!

5.0 John O. Minneapolis, MN

9/24/2025

Mitigate Radon Gas

Professional and straightforward. No monkey business on the pricing. He quoted me the price on the initial phone call. Did the work on time and for the agreed upon price. 10 out of 10.

5.0 Michael B. Minneapolis, MN

8/24/2025

Mitigate Radon Gas

Worked effectively and patiently with me to get to a good solution.

5.0 Chuck M. Saint Paul, MN

8/18/2025

Mitigate Radon Gas

Did a great job! Fast service, came in under price, would hire again tomorrow.

5.0 David H. Burnsville, MN

7/14/2025

Mitigate Radon Gas

Very responsive and competitively priced. Did the job quickly and cleaned up afterwards

5.0 Kathy S. Inver Grove Heights, MN

6/28/2025

Mitigate Radon Gas

Steve called me and offered to come out and inspect my radon system and fix my problem within a couple hours of calling me. He replaced my defective fan and will be coming back to complete the rest of the issues next week. He was very prompt and knowledgeable.

5.0 Garth D. Saint Paul, MN

5/28/2025

Mitigate Radon Gas

1st Defense was able to install the radon system the next day. The post installation radon level was down to 0.2. Very satisfied.

5.0 Aaron J. Minneapolis, MN

5/12/2025

Mitigate Radon Gas

Great communication and completed the job quickly.

5.0 Jessica O. Cottage Grove, MN

4/14/2025

This is one of the best companies we’ve ever worked with! Steve is informative and does great work! Radon mitigation system is outstanding and doing exactly what it’s supposed to be doing!

Showing 1-10 of 206 results Showing 0 of 0 results

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