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Best Radon Contractors in Denver, Colorado (2026)

Ranked using real Google ratings, review counts, and certification data only.

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#1

Kimberley A. Waldron

Denver, CO

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Google rating: No Google rating available

Reviews: 0

Certifications: 2

Certifications

NRPP Measurement ProfessionalNRPP Mitigation Specialist

Services

MitigationTestingCommercial
Call (303) 477-3333Visit website

#3

Absolute Radon Safety

Denver, CO

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Google rating: 4.9 (467 reviews)

Reviews: 467

Certifications: 2

Certifications

NRPP Measurement ProfessionalNRPP Mitigation Specialist

Services

TestingMitigation
Call (303) 880-0682Visit website

#4

Cactus Home Inspection, LLC

Denver, CO

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Google rating: 5.0 (1 reviews)

Reviews: 1

Certifications: 2

Certifications

NRPP Measurement ProfessionalNRPP_MFM

Services

TestingMeasurementCommercial
Call (303) 929-3513Visit website

#7

Villa Vista Inspection Services, LLC

Denver, CO

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Google rating: No Google rating available

Reviews: 0

Certifications: 1

Certifications

NRPP Measurement Professional

Services

TestingTestingMeasurement
Call 3033964806Visit website

#10

Pillar to Post

Denver, CO

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Google rating: 4.9 (558 reviews)

Reviews: 558

Certifications: 1

Certifications

NRPP Measurement Professional

Services

TestingNew ConstructionCommercialPost-Mitigation Testing
Call (303) 655-1177Visit website

#13

Tyler Huff

Denver, CO

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Google rating: 4.9 (184 reviews)

Reviews: 184

Certifications: 3

Certifications

NRPP Measurement ProfessionalNRPP Mitigation SpecialistNRPP_RRNC

Services

TestingMeasurementMitigationSystem DesignNew Construction
Call (970) 340-8744Visit website

#14

Slosky & Company, Inc.

Denver, CO

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Google rating: 5.0 (1 reviews)

Reviews: 1

Certifications: 2

Certifications

NRPP Measurement ProfessionalNRPP_MFM

Services

TestingMeasurementCommercial
Call (315) 247-5767Visit website

#17

Two Moose Home Inspections

Denver, CO

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Google rating: No Google rating available

Reviews: 52

Certifications: 2

Certifications

NRSB Measurement TechnicianNRSB Mitigation Specialist

Services

TestingMeasurementradon mitigationMitigation
Call 5039391147Visit website

#18

HouseMater Serving Denver Central

Denver, CO

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Google rating: No Google rating available

Reviews: 0

Certifications: 1

Certifications

NRPP Measurement Professional

Services

TestingTestingMeasurement
Call 7202952065Visit website

#23

Havens Inspections, LLC.

Denver, CO

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Google rating: No Google rating available

Reviews: 0

Certifications: 1

Certifications

NRSB Mitigation Specialist

Services

radon mitigationMitigation
Call 7204983612Visit website

#25

Colorado Hazard Control

Denver, CO

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Google rating: No Google rating available

Reviews: 0

Certifications: 1

Certifications

NRPP Mitigation Specialist

Services

MitigationTestingCommercial
Call (303) 410-4941Visit website

#29

Home Systems Data, Inc.

Denver, CO

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Google rating: No Google rating available

Reviews: 28

Certifications: 1

Certifications

NRPP Measurement Professional

Services

TestingTestingMeasurement
Call 3037736102Visit website

How We Rank Contractors in Denver

Our ranking methodology is transparent and data-driven. Sponsored placements are clearly labeled and appear separately — they do not influence organic ranking position.

  1. Google rating — Higher average ratings rank higher. This reflects real customer satisfaction across verified Google Business profiles.
  2. Review volume — More reviews break ties between similar ratings. A 4.8 with 50 reviews outranks a 4.8 with 3 reviews because the signal is more reliable.
  3. Certification count — NRPP and NRSB certifications break remaining ties. More certifications indicate broader competency across mitigation, measurement, and specialized techniques.
  4. Data integrity — All ranking data comes from verified sources: Google Business API, NRPP/NRSB certification databases, and contractor websites. Template-generated or unverifiable data is excluded.

Read our full methodology for details on data sourcing, verification, and quality thresholds.

Related Pages

All contractors in Denver (30)All contractors in ColoradoMitigation cost in ColoradoTesting cost in ColoradoDenver Metro metro areaCost calculator tool

FAQ

Who is the best radon contractor in Denver?

Kimberley A. Waldron is currently ranked #1 in Denver based on Google rating, review volume, and certification count from our verified data sources.

How many radon contractors are in Denver?

We currently list 30 radon contractors in Denver, Colorado. 30 hold NRPP or NRSB certifications and 21 have Google reviews.

What should I look for when choosing a radon contractor?

Focus on strong ratings with meaningful review volume, current professional certifications (NRPP or NRSB), and clear service coverage for your home type. A good contractor will assess your specific foundation and provide a written scope that includes suction point count, pipe routing, fan specification, and post-mitigation testing.

How are these Denver contractors ranked?

We rank contractors using a transparent, data-only methodology: Google rating first, review count second, and certification count third. Sponsored placements appear in a separate, clearly labeled section and do not influence organic ranking position. All ranking data comes from verified sources including Google Business profiles and national certification databases.

Should I get multiple quotes in Denver?

Yes. With 30 contractors in Denver, getting at least two written quotes is practical and recommended. Compare the number of suction points, fan model, pipe routing plan, warranty length, and whether post-mitigation testing is included. Price alone is not a reliable differentiator — system design matters more for long-term radon reduction.