Best Radon Testing & Mitigation in Guelph

About Radon in Guelph, Ontario

Last updated: March 2026

Guelph is served by C-NRPP certified radon professionals listed on RadonFinder.ca. Ontario has widely varying radon risk depending on geography. The Ottawa Valley, eastern Ontario, and areas underlain by the Canadian Shield — including parts of Sudbury, Elliot Lake, and the Bancroft region — have elevated radon due to uranium-rich granite bedrock. Southern Ontario's clay and limestone geology generally produces lower levels, though local hotspots exist in any region. Health Canada estimates roughly 7% of Ontario homes exceed the guideline.

Typical Mitigation Cost in Ontario

$1,800–$3,200

Near national average

Costs vary significantly between the GTA, Ottawa, and northern Ontario due to labour markets and home construction types.

•Foundation type — poured concrete, block, or slab
•Basement finish level — unfinished installs are faster and cheaper
•Pipe routing complexity in finished or split-level homes
•GTA vs. rural Ontario labour rate differences
•Age of home — older homes may require additional sealing work

Showing 1–16 of 20 professionals in Guelph

LEX Scientific Inc.

Guelph, ON

Basic

4.5(24)Google

C-NRPP Certified staff in Guelph, ON, provides radon testing, measurement, and mitigation services. Offers residential radon test kits. Established 1981.

TestingMitigation

(519) 830-1386Call View Profile

Geosyntec Consultants

Guelph, ON

Basic

5.0(1)Google

TestingMitigation

(519) 515-0886Call View Profile

Geosyntec

Guelph, ON

Basic

5.0(1)Google

Mitigation

(705) 808-5661Call View Profile

Rival Home Inspections

Ajax, ON

Basic

5.0(190)Google

Offers radon services. Serves Ajax, ON, Toronto, Durham, York, Peel, Halton, Simcoe, Brant, Dufferin, Kawartha Lakes, Hamilton, Waterloo, Peterborough, and all GTA Regions.

Testing

(905) 922-5437Call View Profile

South West Radon Pros Inc.

Kitchener, ON

Basic

5.0(44)Google

Offers C-NRPP certified radon testing, mitigation, and DIY fix solutions. Serving Kitchener, Waterloo, Cambridge, Guelph, and surrounding areas, they guarantee reduced radon levels in residential settings.

TestingMitigation

(519) 807-1995Call View Profile

Radon Gas Guys

Waterloo, ON

Basic

Provides C-NRPP certified radon testing, mitigation, and removal services with a 100% guarantee for homes in Kitchener, Waterloo, Guelph, Hamilton, and Burlington. Offers free 91-day test kits.

TestingMitigation

(519) 572-7896Call View Profile

Expert Plumbing and Drains Inc

Burlington, ON

Basic

5.0(183)Google

A full-service plumbing and drain company offering heating and radon services. Brings over 80 years of combined experience to homeowners and custom home builders.

Testing

(905) 531-4111Call View Profile

Radiation Safety Institute of Canada, National Laboratories

Toronto, ON

Basic

3.6(7)Google

Provides radon testing and CRM calibration services. Features a radon chamber and offers comprehensive radiation safety education.

Testing

(416) 650-9090Call View Profile

The Bearstar Group Inc

North York, ON

Basic

4.3(6)Google

Offers hazardous material abatement services including radon solutions for commercial, industrial, and institutional buildings. Provides identification, removal, and disposal with 25+ years expertise.

TestingMitigation

(905) 484-9798Call View Profile

Martech Group Inc.

Mississauga, ON

Basic

4.9(19)Google

Testing

(416) 801-0593Call View Profile

Canada Post

Mississauga, ON

Basic

2.2(182)Google

Testing

(416) 909-6969Call View Profile

Borts Home and Energy

Etobicoke, ON

Basic

4.8(237)Google

TestingMitigation

(416) 880-7620Call View Profile

WSP Canada

Etobicoke, ON

Basic

4.8(12)Google

TestingMitigation

(647) 299-6692Call View Profile

BluMetric Environmental Inc.

Kitchener, ON

Basic

3.0(2)Google

TestingMitigation

1 877-487-8436 ext. 267Call View Profile

ECOH Management Inc.

Toronto, ON

Basic

4.9(7)Google

Testing

(416) 786-9746Call View Profile

ECOH

Mississauga, ON

Basic

4.9(7)Google

Testing

(905) 795-2800Call View Profile

Frequently Asked Questions: Radon in Guelph

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

Most homeowners in Ontario pay between $1,800 and $3,200 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.

Guelph 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 — 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.