Best Radon Testing & Mitigation in Granby

About Radon in Granby, Quebec

Last updated: March 2026

Granby is served by C-NRPP certified radon professionals listed on RadonFinder.ca. Quebec's radon risk is concentrated in regions underlain by the Grenville geological province, including the Laurentians, Eastern Townships, the Outaouais, and parts of Mauricie, where uranium-bearing gneiss and granite produce elevated soil gas. The Montreal urban area, sitting on the St. Lawrence Lowlands, generally shows lower levels. Quebec has a high proportion of older housing stock in cities like Quebec City and Trois-Rivières, and older construction with block foundations and open sump pits tends to allow more radon entry.

Typical Mitigation Cost in Quebec

$2,200–$3,600

Near national average

Montreal-area labour rates apply in the urban corridor; rural and Laurentian regions may see higher costs due to contractor travel.

•Foundation type: block, poured concrete, or stone foundations in older Quebec homes
•Open sump pits and floor drains as radon entry points
•Finished vs. unfinished basement: finishing adds pipe-routing complexity
•Bilingual service availability in some rural areas
•Age of home: pre-1980 homes often require more sealing work

Showing 1–9 of 9 professionals in Granby

Ventilation Moderne inc.

Granby, QC

4.7(23)Google

Ventilation Moderne inc. is a C-NRPP certified radon testing and mitigation professional serving Granby, QC. They offer complete radon solutions from initial testing through to mitigation system installation.

TestingMitigation

(450) 375-0521Call View Profile

Radon Expert LM

Saint-Hubert, QC

5.0(147)Google

Offers professional radon detection, measurement, and mitigation solutions. Licensed (RBQ 5821-5393-01) and PNCR-C accredited, using certified Radon X systems.

TestingMitigation

(450) 516-5699Call View Profile

Roland Grenier Construction Ltee

Anjou, QC

1.0(1)Google

Roland Grenier Construction Ltee is a C-NRPP certified radon mitigation professional serving Anjou, QC. Their certified team installs sub-slab depressurization systems to reduce indoor radon to safe levels.

Mitigation

(514) 570-5808Call View Profile

WSP

Montreal, QC

4.6(65)Google

WSP is a C-NRPP certified radon testing professional serving Montreal, QC. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(438) 468-2064Call View Profile

Spheratest

Montreal, QC

4.4(10)Google

Certified PNCR-C professional for radon gas services in Montréal, QC. Specializes in residential, commercial, and investor client needs.

Testing

(514) 522-5005Call View Profile

Climatisation Novatrix

Ste-Julie, QC

4.7(217)Google

Conçoit et installe des solutions HVAC performantes pour les projets de construction et rénovations résidentielles majeures. Effectue le nettoyage de systèmes de ventilation.

TestingMitigation

(450) 649-7787Call View Profile

Envirosol

Sherbrooke, QC

4.4(31)Google

Environmental consulting firm providing radon detection, testing, and mitigation services.

TestingMitigation

(819) 791-2303Call View Profile

exp Services Inc.

Montreal, QC

4.3(7)Google

exp Services Inc. is a C-NRPP certified radon testing professional serving Montreal, QC. Their certified inspectors provide accurate radon measurements for homes and businesses.

Testing

(514) 238-2511Call View Profile

Renov-Action Michel Haineault Inc.

Saint-mathias-sur-richelieu, QC

4.9(16)Google

Renov-Action Michel Haineault Inc. is a C-NRPP certified radon mitigation professional serving Saint-mathias-sur-richelieu, QC. Their certified team installs sub-slab depressurization systems to reduce indoor radon to safe levels.

Mitigation

(514) 951-8293Call View Profile

Frequently Asked Questions: Radon in Granby

RadonFinder.ca lists C-NRPP certified radon testing and mitigation professionals serving Granby, Quebec. Browse the directory above to compare professionals by services offered, certifications, and reviews.

Most homeowners in Quebec pay between $2,200 and $3,600 for a complete radon mitigation system. Actual cost depends on your foundation type, home size, and the complexity of the installation. Request quotes from multiple professionals to compare.

Granby follows Health Canada's national guideline of 200 Bq/m³. If your home tests above this level, Health Canada recommends taking action to reduce radon within two years for levels between 200 and 600 Bq/m³, and within one year if above 600 Bq/m³.

Yes. Health Canada recommends testing every home in Canada, regardless of age, construction type, or location. Radon levels vary from house to house and even neighbouring homes can have very different readings. A long-term test of at least 91 days during the heating season is the most reliable method.

The most common system is active sub-slab depressurization (ASD). A certified professional installs a pipe through your foundation slab connected to a fan that draws radon from beneath the home and vents it safely above the roofline. Installation typically takes one day.