Radon Contractors in Portland, ME

12 radon mitigation and testing specialists serving Portland and the surrounding area — residential and commercial properties.

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

Step 1: Test Your Home

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Be Safe Radon

26 Castle Ct, Casco, ME 04015, USA

5.0(8 reviews)

(207) 595-2822

Square One Home Inspections, LLC. - Home Inspections and Radon/Water Testing

Maine St, Brunswick, ME 04011, USA

5.0(766 reviews)

(207) 560-3222

Quality Radon

216 Mountain View Dr, Hermon, ME 04401, USA

5.0(246 reviews)

(207) 358-6553

Radon Check Inc

475 US-1 Suite 10, Freeport, ME 04032, USA

5.0(2 reviews)

(207) 885-0851

Maine Line Water & Radon Treatment

270 Waterford Rd, Norway, ME 04268, USA

5.0(4 reviews)

(207) 418-5730

Focused Property Inspections

347 Main St #1b, Gorham, ME 04038, USA

5.0(1,520 reviews)

(207) 839-6595

ABSOLUTE ENVIRONMENTAL

6601 NE 66th Ave, Portland, OR 97218, USA

5.0(35 reviews)

(503) 878-9828

Northeast Radon Solutions, LLC

7 Poplar Ridge Dr, Falmouth, ME 04105, USA

4.9(50 reviews)

(207) 846-0709

Air & Water Quality Inc

160 US-1, Freeport, ME 04032, USA

4.9(1,562 reviews)

(800) 698-9655

Evergreen Home Performance

190 Riverside St #2A, Portland, ME 04103, USA

4.8(108 reviews)

(207) 387-9839

Radon Testing - Goodwin Environmental Testing

17 Kathryn Ln, Bangor, ME 04401, USA

4.7(3 reviews)

(207) 852-8023

Maine Radon Pro LLC

1164 Lewiston Rd, New Gloucester, ME 04260, USA

(207) 268-2987

Commercial Radon Services in Portland, ME

Radon is not just a residential concern. Office buildings, schools, warehouses, retail centers, and multi-family complexes in Portland are all subject to radon intrusion through concrete slabs, block foundations, and crawl spaces. Commercial radon mitigation in Portlandfollows 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 Portland.

Commercial Mitigation

Sub-slab depressurization systems, crawl space encapsulation, and HVAC-integrated ventilation upgrades sized for commercial square footage. Portland 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 Portland and the surrounding ME region.

Commercial Radon FAQ — Portland

What is commercial radon mitigation in Portland?
Commercial radon mitigation in Portland 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 Portland, ME 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 Portland radon contractors handle commercial buildings?
Several radon contractors serving Portland 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 Portland 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 Portland?
Commercial radon mitigation systems in Portland 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 Portland? Contact the certified specialists listed above. Confirm commercial availability when scheduling — some contractors serve residential clients only.