Radon Contractors in St Louis, MO

16 radon mitigation and testing specialists serving St Louis and the surrounding area — residential and commercial properties.

EPA action level: 4 pCi/L · NRPP/NRSB certified professionals · Residential & commercial radon services

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Radon Control Services

101 W Argonne Dr, Kirkwood, MO 63122, USA

5.0(3 reviews)

(314) 616-0218

Air Sense Environmental- Radon Mitigation & Testing

5237 Old Alton Edwardsville Rd, Edwardsville, IL 62025, USA

5.0(132 reviews)

(314) 664-9807

Buck Radon Inspection | Radon Testing

3210 S Big Bend Blvd, Maplewood, MO 63143, USA

5.0(2 reviews)

(636) 225-0000

Radon Safety Squad

56 Lou Juan Dr, Glen Carbon, IL 62034, USA

5.0(14 reviews)

(618) 667-2366

Radon Solutions

211 N Marquette St, Davenport, IA 52802, USA

5.0(31 reviews)

(563) 386-8686

Spotlight Radon Testing

7728 Gissler Ave, Richmond Heights, MO 63117, USA

5.0(2 reviews)

(314) 458-3811

St. John Environmental Consulting, LLC

5515 Grace Ave, St. Louis, MO 63116, USA

5.0(187 reviews)

(314) 853-4668

American Environmental

3441 Morgan Ford Rd, St. Louis, MO 63116, USA

5.0(50 reviews)

(314) 907-1561

AWA Environmental - Saint Louis Mold Inspectors

3361 Sublette Ave, St. Louis, MO 63139, USA

5.0(13 reviews)

(314) 370-8947

Pillar To Post Home Inspectors - Alliance Team

11424 Gravois Rd, St. Louis, MO 63126, USA

4.9(2,016 reviews)

(314) 645-7871

Mold Solutions

12154 Lackland Rd, St. Louis, MO 63146, USA

4.9(179 reviews)

(314) 993-6653

Advanced Radon Mitigation LLC

13680 Michael Rd, Highland, IL 62249, USA

4.8(16 reviews)

(618) 910-2034

Advanced Environmental Services Inc

3100 Gravois Ave, St. Louis, MO 63118, USA

4.8(64 reviews)

(314) 865-2662

Abatement Specialists

8 Lakenny Ln #11, Fenton, MO 63026, USA

4.7(12 reviews)

(314) 686-1487

Environmental Remediation Contractor

370 N Eureka Ave, Columbus, OH 43204, USA

4.4(7 reviews)

(614) 769-6535

Less Radon

9648 Olive Blvd Suite #419, Olivette, MO 63132, USA

3.2(17 reviews)

(314) 723-6789

Commercial Radon Services in St Louis, MO

Radon is not just a residential concern. Office buildings, schools, warehouses, retail centers, and multi-family complexes in St Louis are all subject to radon intrusion through concrete slabs, block foundations, and crawl spaces. Commercial radon mitigation in St Louisfollows EPA large-building protocols, requires certified measurement professionals, and involves mitigation systems scaled to the property's square footage and occupancy type.

Commercial Testing

Multi-point alpha track or continuous electronic monitor deployment across all occupied zones per EPA large-building protocol. Required for OSHA compliance and real estate due diligence in St Louis.

Commercial Mitigation

Sub-slab depressurization systems, crawl space encapsulation, and HVAC-integrated ventilation upgrades sized for commercial square footage. St Louis contractors handle buildings from small suites to large industrial properties.

Monitoring & Certification

Post-mitigation verification, ongoing radon monitoring systems, and certification documentation for property managers, lenders, and insurers in St Louis and the surrounding MO region.

Commercial Radon FAQ — St Louis

What is commercial radon mitigation in St Louis?
Commercial radon mitigation in St Louis involves installing sub-slab depressurization systems, crawl space encapsulation, and ventilation upgrades in office buildings, warehouses, schools, retail spaces, and multi-family units. Commercial systems are scaled to the building's square footage and HVAC layout — they differ significantly from residential systems in design, permitting, and ongoing monitoring requirements.
How is commercial radon testing different from residential testing?
Commercial radon testing in St Louis, MO typically follows EPA protocols for large buildings (EPA 402-K-93-001), which require multiple test devices per floor and longer measurement periods than home tests. Certified radon measurement professionals deploy long-term alpha track detectors or continuous electronic monitors across all occupied and sub-occupied zones.
Which St Louis radon contractors handle commercial buildings?
Several radon contractors serving St Louis hold NRPP or NRSB commercial certifications for large-structure mitigation and testing. Contact the specialists listed on this page to confirm commercial service availability, as some firms specialize exclusively in residential properties.
What radon level triggers mitigation in a commercial building?
OSHA and the EPA both recommend action at or above 4 pCi/L for occupied commercial and industrial spaces. Many St Louis property managers choose to mitigate at 2–3 pCi/L to stay well below regulatory thresholds and reduce liability exposure. Schools and healthcare facilities often target sub-2 pCi/L levels.
How much does commercial radon mitigation cost in St Louis?
Commercial radon mitigation systems in St Louis typically range from $1,500 for small retail suites to $25,000+ for large industrial or multi-story buildings. Cost depends on slab area, number of sub-slab suction points, existing HVAC infrastructure, and post-mitigation verification testing. Request quotes from multiple licensed contractors listed on this page.

Need commercial radon mitigation or testing in St Louis? Contact the certified specialists listed above. Confirm commercial availability when scheduling — some contractors serve residential clients only.