Radon Testing Companies in Colorado

Testing is the only way to know how much radon is in a home. Colorado's health department says elevated levels turn up in one out of every two Colorado homes, so a test is worth doing in any house, old or new.

There are two kinds of test. A short-term test runs 48 to 120 hours with the house closed for 12 hours before it starts. A long-term test runs from 91 days to a year and gives a better picture of the level over the seasons. For your own purposes, test the lowest lived-in floor. For a home sale, test the lowest area that could become living space, such as an unfinished basement.

Do-it-yourself kits cost about $10 to $50 at home improvement stores, and the state sells discounted kits. Home buyers are encouraged to test during the inspection with a licensed radon measurement professional. The companies below test for radon; many are home inspectors who test as part of an inspection, and those that also install systems are listed first.

Top 60 of 133: radon testing

Axium Inspections

4.9(4,319 reviews on Google)

1700 Lincoln St, Denver

  • Installs radon mitigation systems
  • Radon testing
  • New construction
(720) 593-6519

Radon Safety LLC

4.9(696 reviews on Google)

885 Parfet St Ste f, Lakewood

  • Installs radon mitigation systems
  • Radon testing
(303) 462-5000

APEX Radon

4.9(608 reviews on Google)

9570 Accord Ln Unit 308, Parker

  • Installs radon mitigation systems
  • Radon testing
  • Sub-slab depressurization
(720) 580-0246

Key Inspection Services

Testing only

5.0(480 reviews on Google)

7155 Nettlewood Pl, Colorado Springs

  • Radon testing
  • Free estimates
  • Colorado radon license shown
(719) 332-9660

Rapid Radon Relief

5.0(356 reviews on Google)

4320 E 109th Ave, Thornton

  • Installs radon mitigation systems
  • Radon testing
  • Crawlspace systems
(303) 228-6807

5280 Radon Mitigation

4.9(331 reviews on Google)

1173 S Huron St, Denver

  • Installs radon mitigation systems
  • Radon testing
  • Real estate transactions
(720) 695-6677

SWAT Radon Mitigation

4.8(370 reviews on Google)

7325 S Revere Pkwy Ste 505, Centennial

  • Installs radon mitigation systems
  • Radon testing
  • Sub-slab depressurization
(720) 920-9797

Aspen Radon

4.9(279 reviews on Google)

6050 Stetson Hills Blvd #255, Colorado Springs

  • Installs radon mitigation systems
  • Radon testing
  • Sub-slab depressurization
(719) 322-3131

RDS Environmental

4.9(178 reviews on Google)

11603 Teller St # A, Broomfield

  • Installs radon mitigation systems
  • Radon testing
  • Commercial and multifamily
(720) 983-3297

Rapid Response

4.9(173 reviews on Google)

804 Noland Ave, Grand Junction

  • Installs radon mitigation systems
  • Radon testing
  • Sub-slab depressurization
(970) 248-9805

Colorado Radon Company

4.9(146 reviews on Google)

2531 W 62nd Ct Unit B, Denver

  • Installs radon mitigation systems
  • Radon testing
  • Sub-slab depressurization
(720) 619-0198

ExperTech Environmental

4.9(144 reviews on Google)

32 N Silicon Drive. Unit 9, Pueblo West

  • Installs radon mitigation systems
  • Radon testing
  • Crawlspace systems
(719) 285-9956

The Radon Guy LLC

5.0(103 reviews on Google)

4316 N Liverpool St, Denver

  • Installs radon mitigation systems
  • Radon testing
  • Sub-slab depressurization
(303) 868-7102

M.A.R.S. Environmental

4.9(103 reviews on Google)

580 Burbank St #115, Broomfield

  • Installs radon mitigation systems
  • Radon testing
  • Commercial and multifamily
(720) 388-8448

Eco Handyman

4.8(107 reviews on Google)

4845 Pearl E Cir #101, Boulder

  • Installs radon mitigation systems
  • Radon testing
  • Free estimates
(303) 444-2181

Radon Gone Mitigation

4.8(105 reviews on Google)

2150 W 6th Ave Ste n-1, Broomfield

  • Installs radon mitigation systems
  • Radon testing
  • Sub-slab depressurization
(303) 505-2597

Summit Radon Solutions

4.9(75 reviews on Google)

220 Buffalo Mountain Dr B105, Silverthorne

  • Installs radon mitigation systems
  • Radon testing
  • Commercial and multifamily
(970) 470-3613

BreatheCleanColorado

Testing only

5.0(66 reviews on Google)

7265 Poudre Canyon Rd, Fort Collins (based in Bellvue)

  • Radon testing
  • Commercial and multifamily
(970) 493-1499

Colorado Radon Solutions

5.0(63 reviews on Google)

305 S Ridge St Unit 5821, Breckenridge

  • Installs radon mitigation systems
  • Radon testing
  • Sub-slab depressurization
(970) 306-7973

Evergreen Radon

5.0(55 reviews on Google)

27972 Meadow Dr, Golden (based in Evergreen)

  • Installs radon mitigation systems
  • Radon testing
  • Commercial and multifamily
(303) 943-1415

Radon Testing Companies by city

The number of listed radon contractors confirmed for radon testing on each city page.

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