Timmerman Radon Testing, LLC
radon
Serving Hiawatha, IA
From Google Business Profile
5.0
10 Google reviews
Hours
| Monday | 8 AM–5 PM |
| Tuesday | 8 AM–5 PM |
| Wednesday | 8 AM–5 PM |
| Thursday | 8 AM–5 PM |
| Friday | 8 AM–5 PM |
| Saturday | Closed |
| Sunday | Closed |
Google categories: Home inspector
View on Google Maps →Last checked October 6, 2026.
More from Google Business Profile
Listed features
- Accessibility
- Wheelchair accessible parking lot
Photos on Google: 5
Recent Google reviews (excerpts)
Written by Google users, not by EdgeLocal. EdgeLocal has not verified them and does not show reviewer names.
5 out of 5 stars · Jan 2025
Andy was very knowledgeable and helpful! Would recommend.
5 out of 5 stars · Dec 2022
Great service and happy with the radon test results.
5 out of 5 stars · Aug 2020
Great service, quick, and friendly.
The owner replied to 0 of the 8 most recent reviews Google showed.
From Google Business Profile, last checked October 6, 2026.
About this business
Timmerman Radon Testing LLC, uses some of the most accurate and dependable continuous radon monitors on the market.
Services
- radon tests
- continuous radon monitors
Service area: Cedar Rapids, Marion, Hiawatha, Iowa City, Coralville, North Liberty, Robins, Center Point, Urbana, Palo, Shellsburg, Atkins, Fairfax, Walford, Swisher, Ely, Lisbon, Mt. Vernon
- Licensing
- RNTST09152
Brands and certifications: RadStar RS300
Elsewhere online: LinkedIn · Facebook
Source: the business's own website, read automatically on October 24, 2026. Not verified by EdgeLocal.
About radon mitigation in Hiawatha
Radon mitigation contractors test for and reduce radon gas levels in homes. Radon mitigation contractors perform radon testing, install sub-slab depressurization systems with fans and piping, seal cracks and sump pits, and verify reduced levels with follow-up testing.
Typical cost: $900–$2,500 for a typical mitigation system. See the full cost guide
Typical U.S. ranges from industry sources (2024–25); not EdgeLocal data. Your quote will vary with scope, materials and location.
Questions to ask this contractor
- Verify state certification: Iowa, Minnesota, Illinois and Nebraska credential radon professionals.
- Ask about post-mitigation testing: Confirm levels below 4 pCi/L.
- Discuss fan placement: Fans should be outside living space.