Colorado Radon Mitigation logo

Colorado Radon Mitigation

Contractor · Westminster, CO · reviewed since 2020

How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%97+52.9Reliability 24%99+24Value 14%100+14.1Replies to reviews 7%66+4.7Experts Score= 96Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.96SCORE
AGradeLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#20 of 56 radon testing servicesPosition by Experts Score among all companies we track in this category. · better than 65%
5.0 ★★★★★ 223 Google reviews · 24 photos
98%five-star reviews
4.96★last 12 monthsAverage stars on reviews from the last 12 months only.
0%1–2★ in 2 yearsShare of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
67%reviews answered by the owner
Oct 2026latest review

Colorado Radon Mitigation at a glance

Customers report that Colorado Radon Mitigation handles new installations and system upgrades with punctuality, clear communication, and transparent pricing. Reviewers note that the team explains the process thoroughly, respects property, and resolves radon issues efficiently without overselling. A recurring criticism involves phone interactions where some callers felt dismissed or uncomfortable asking questions, although the overall rating remains high.

  • Google rating: 5.0 out of 5 from 223 reviews (98% five-star).
  • Reviews on this page: 223 Google reviews (195 with written comments, 3 with photos).
  • Owner responses: the business replied to 67% of reviews.
  • Most recent review: October 22, 2026.
  • Service: Radon Testing Service serving Westminster, Colorado.

Data from Google, last updated October 26, 2026.

Score profile vs other radon testing services

Score per factor (100 = best)Each factor is scored 0–100 on absolute terms (star average, share of 1–2★ reviews, price verdicts…); standing within the category can only raise it, never lower it.. Strongest: craft & service and value; weakest: replies to reviews.

Satisfaction97Reliability99Craft & service100Value100Momentum100Replies to reviews66Satisfaction: 97 (median 95)Reliability: 99 (median 95)Craft & service: 100 (median 98)Value: 100 (median 100)Momentum: 100 (median 100)Replies to reviews: 66 (median 82)
Colorado Radon MitigationRadon Testing Services median0 = centre, 100 = best
SatisfactionSatisfaction · 54% of the scoreRecency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Colorado Radon Mitigation: 97/100 on this factor. Category median: 95.A
97
ReliabilityReliability · 24% of the scoreHow rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Colorado Radon Mitigation: 99/100 on this factor. Category median: 95.A
99
Craft & serviceCraft & service · penalty only, up to −10 pointsGoogle review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Colorado Radon Mitigation: 100/100 on this factor. Category median: 98.A
100
ValueValue · 14% of the scoreCustomers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Colorado Radon Mitigation: 100/100 on this factor. Category median: 100.A
100
MomentumMomentum · penalty only, up to −10 pointsPenalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Colorado Radon Mitigation: 100/100 on this factor. Category median: 100.A
100
Replies to reviewsReplies to reviews · 7% of the scoreHow often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.Colorado Radon Mitigation: 66/100 on this factor. Category median: 82.B
66

Bar = this company · dark tick = category median.

Star ratings

223 Google reviews we collected

  • 5 stars21998%
  • 4 stars31%
  • 3 stars10%
  • 2 stars00%
  • 1 star00%

Praise vs complaints

Phrases our text analysis found in 195 written reviews

  • Praise463100%
  • Complaints20%

PriceGoogle asks reviewers whether the price was great, reasonable or overpriced; these are their answers.

Price verdicts customers left with their Google review

  • Great price1830%
  • Reasonable4168%
  • Overpriced00%
  • Not sure12%

Topic share

How often each topic comes up in the written reviews

  • Staff & attitude9520%
  • Speed & response9220%
  • Would recommend8518%
  • Quality & results8418%
  • Communication5011%
  • Price & value4810%
  • Honesty & trust112%

What customers talk about

We read 195 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.

  • “Professional, explained the process and expectations from the start; Keelan was a pleasure to work with; installation was on time.”
  • “They gave a quick assessment and were able to work around my preferred placement of the radon fan.”
  • “If you’re looking to install or upgrade your radon system, we highly recommend reaching out to their team!”
  • “Kelon did some good work and seemed to go pretty above and beyond.”
  • “The work was neatly done, and they listened to my request for a slight modification to the system.”
  • “They had very transparent, itemized pricing and the overall cost was quite fair considering that it made my living space safer.”
  • “Then when it came time for our service (updating 15 year old system) the install tech was honest and thoughtful.”

People customers mention

  • Tyler 14 reviews
  • Axel 8 reviews
  • Denver 4 reviews
  • Keelan 4 reviews
  • Zeke 4 reviews
  • David 3 reviews

praise complaint · found by our text analysis, Google review wording unchanged.

Reviews for your job

Customers hired Colorado Radon Mitigation for 3 kinds of job. Pick one to see what they paid and said.

Recent reviews

B9 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 3 days ago★★★★★

Kelon did some good work and seemed to go pretty above and beyond. Plus a lot of home maintenance companies appear to have been taken over by hedge funds and turned their techs into sales people. I didn't catch that vibe from these people at all.

Christine1 reviewTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 5 days ago★★★★★

Couldn’t have asked for a better partner for our radon mitigation system upgrade! The Colorado Radon Mitigation team made scheduling easy and upgraded our existing system from passive to active. We appreciated how straightforward they made the process and are happy we chose them for the job. If you’re looking to…

Great priceInstallationService not listed
Aubrey7 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 weeks ago★★★★★

They were great - they solved our issue exactly without overselling. It was honest, quick, and professional.

BrendaLocal Guide · 8 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 3 weeks ago★★★★★

They were able to work us in on short notice and get a new system installed before we closed on moms house

Reasonable priceService not listed
Samantha10 reviewsTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 3 weeks ago★★★★★

I got a radon system installed recently because my finished basement was consistently reading high. They gave a quick assessment and were able to work around my preferred placement of the radon fan. They had very transparent, itemized pricing and the overall cost was quite fair considering that it made my living…

Great priceFan installationInstallation
Tracie1 reviewTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 3 weeks ago★★★★★

Responded almost immediately to text message for estimate and then after we contracted for service they came out within a few days. The tech arrived right inside the service window time and fixed things right up.

Great price

Photos

Customer reviews

5.0 ★★★★★ 223 reviews on Google · rating breakdown

Reviews from Google, shown as published (original wording, unedited).

Jobs customers hired them for — from Google's service tags and the review text
Team members customers mention
Filter by topic — each topic is highlighted in the reviews in the same color
B Anonymouse9 reviewsTotal number of Google reviews B has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Kelon did some good work and seemed to go pretty above and beyond. Plus a lot of home maintenance companies appear to have been taken over by hedge funds and turned their techs into sales people. I didn't catch that vibe from these people at all.

Christine Odegi1 reviewTotal number of Google reviews Christine has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Couldn’t have asked for a better partner for our radon mitigation system upgrade! The Colorado Radon Mitigation team made scheduling easy and upgraded our existing system from passive to active. We appreciated how straightforward they made the process and are happy we chose them for the job. If you’re looking to install or upgrade your radon system, we highly recommend reaching out to their team!

  • Price assessment: Great price
  • Services: Installation, Service not listed
Response from the owner · 4 days ago

Hi Christine, Thank you for the fantastic review and recommendation! We're delighted to hear that our team made upgrading your existing passive radon system to an active system such a smooth and straightforward experience. We understand the importance of clear communication, convenient scheduling, and quality workmanship, so we truly appreciate your recognition of those efforts. Thank you for trusting Colorado Radon Mitigation with your home's radon protection! Best regards, Colorado Radon Mitigation

Aubrey Hill7 reviewsTotal number of Google reviews Aubrey has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

They were great - they solved our issue exactly without overselling. It was honest, quick, and professional.

Response from the owner · 2 weeks ago

Hi Aubrey, Thank you for the wonderful review! We're glad our team was able to resolve your radon concerns quickly and professionally. We pride ourselves on providing honest assessments and recommending only the work that's truly necessary, so we especially appreciate you recognizing that commitment. Thank you for trusting Colorado Radon Mitigation! Best regards, Colorado Radon Mitigation

Brenda LaSalleLocal Guide · 8 reviewsTotal number of Google reviews Brenda has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

They were able to work us in on short notice and get a new system installed before we closed on moms house

  • Price assessment: Reasonable price
  • Services: Service not listed
Response from the owner · 2 weeks ago

Hi Brenda, Thank you for the great review! We're glad we were able to accommodate the tight timeline and get the new radon mitigation system installed before closing. We appreciate you trusting our team to help with your mom's home! Best regards, Colorado Radon Mitigation

Samantha K (CardiganCorgi)10 reviewsTotal number of Google reviews Samantha has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

I got a radon system installed recently because my finished basement was consistently reading high. They gave a quick assessment and were able to work around my preferred placement of the radon fan. They had very transparent, itemized pricing and the overall cost was quite fair considering that it made my living space safer. They were able to finish the work within 4hrs-5hrs and I had immediately lower radon readings.

  • Price assessment: Great price
  • Services: Fan installation, Installation
Response from the owner · 3 weeks ago

Hi Samantha, Thank you for the thoughtful review! We're glad our team was able to work around your preferred system placement while keeping the process transparent and straightforward. It's especially great to hear that you saw an immediate reduction in your radon levels after the installation. We really appreciate you choosing Colorado Radon Mitigation to help make your home safer! Best regards, Colorado Radon Mitigation

Tracie Alexander1 reviewTotal number of Google reviews Tracie has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Responded almost immediately to text message for estimate and then after we contracted for service they came out within a few days. The tech arrived right inside the service window time and fixed things right up.

  • Price assessment: Great price
Response from the owner · 3 weeks ago

Hi Tracie, Thank you for the great review! We're glad our team was able to respond quickly, get you scheduled within just a few days, and take care of everything during the service visit. We know how important timely communication and dependable scheduling are, so we really appreciate you recognizing those efforts. Thank you for choosing Colorado Radon Mitigation! Best regards, Colorado Radon Mitigation

G Michael MooreLocal Guide · 20 reviewsTotal number of Google reviews G has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Keelan and associate provided fast, knowledgable service to replace a very noisy radon fan at a competitive price. They had excellent suggestions for sound mitigation. I am very happy with the result. They tested for airflow through the slab and updated my manometer at no extra charge.

  • Price assessment: Reasonable price
  • Services: Service not listed
Response from the owner · 3 weeks ago

Hi Michael, Thank you for the excellent review! We're glad Keelan and the team were able to diagnose the issue, replace the noisy fan, and find a solution that improved the sound of your system. We appreciate you recognizing their knowledge and attention to detail, including testing the system's airflow to make sure everything was operating properly. Thank you for trusting Colorado Radon Mitigation! Best regards, Colorado Radon Mitigation

Jean Lorenz7 reviewsTotal number of Google reviews Jean has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Colorado radon mitigation did an outstanding job for us. Their knowledge, experience, and Customer Service was all first rate. They went above and beyond to get us an excellent result. Would highly recommend.

  • Price assessment: Great price
  • Services: Service not listed
Response from the owner · a month ago

Hi Jean, Thank you for the wonderful five-star review and recommendation! We're thrilled to hear that our team's knowledge, experience, and customer service stood out throughout the process. Going above and beyond to achieve the best possible result for each home is exactly what we strive for. We truly appreciate your trust in us and your kind words! Colorado Radon Mitigation

Chris Thuenen7 reviewsTotal number of Google reviews Chris has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Professional, explained the process and expectations from the start; Keelan was a pleasure to work with; installation was on time. Highly recommend!!

Response from the owner · a month ago

Hi Chris, Thank you for the five-star review and recommendation! We're glad our team clearly communicated the process and expectations from the beginning and that everything stayed on schedule. We'll be sure to pass your kind words along to Keelan as well. We truly appreciate you choosing Colorado Radon Mitigation! Colorado Radon Mitigation

Scott GreenLocal Guide · 87 reviewsTotal number of Google reviews Scott has written across all businesses on Google Maps, not just this one.
Review from Google · view on Google
★★★★★

Clean installation, fair price and excellent clean up. Highly recommend.

  • Price assessment: Reasonable price
  • Services: Service not listed
Response from the owner · a month ago

Hi Scott, Thank you for the five-star review and recommendation! We're glad you were pleased with the quality of the installation, our pricing, and the care our team took to leave everything clean when the job was complete. We truly appreciate you choosing Colorado Radon Mitigation and taking the time to share your experience. Colorado Radon Mitigation

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