Analyzing 7,364,2957.4M ReviewsFor 20,86320.9K Experts

Experts Reviews · Company report
Great Lakes Radon logoHow 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%98+53.5Reliability 24%96+23.3Value 14%100+14.1Replies to reviews 7%56+4Experts Score= 95Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.95SCORE

Great Lakes Radon

Detroit, MI · Grade ALetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20. · #26Position by Experts Score among all companies we track in this category. of 56 radon testing services · 5.0★ from 324 Google reviews

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Percentile vs other radon testing services (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: value and momentum; weakest: replies to reviews.

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.Great Lakes Radon is better than 98% of radon testing services.A
98
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.Great Lakes Radon is better than 96% of radon testing services.A
96
Craft & serviceCraft & service · 0% of the scoreGoogle 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.Great Lakes Radon is better than —% of radon testing services.–
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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.Great Lakes Radon is better than 100% of radon testing services.A
100
MomentumMomentum · 0% of the scorePenalises 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.Great Lakes Radon is better than 100% of radon testing services.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.Great Lakes Radon is better than 56% of radon testing services.C
56

Reviews for your job

Customers hired Great Lakes Radon for 3 kinds of job.

Great Lakes Radon for fan installation

Clear ✕
Jobs reviewedHow many Google reviews are tagged with this job.7
★ on this jobAverage stars on the reviews where the customer tagged this exact job (Google’s “Services” field).5.00
Usually paidThe price range customers picked most often for this job.—
Rank for this jobPosition of this company in the Job match ranking for this job among the companies we track.Its Job match: 84/100.How Job match is calculatedBuilt only from reviews Google tagged “Fan installation”:Stars on this job 55%Number of such jobs 25%Overall Experts Score 20%Stars are pulled toward the category average when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.#5 / 9
Said fairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”.100%

All 7 Google reviews tagged “Fan installation”

Teach5 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 months ago★★★★★

Our home presented a challenge for installation of a radon mitigation system. Dalton and Logan talked us through the possible solutions, answering all our questions. They worked efficiently and went over the details of the system before they left. I would definitely recommend this group to others needing this service.

Reasonable priceFan installation
Kodai3 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. · 4 months ago★★★★★

We had an excellent experience with Great Lakes Radon installing a radon mitigation system in our home this past week. Before installation, our radon levels were measuring between 3.0–4.0 pCi/L; afterward, they've dropped to around 0.4 pCi/L. The team was patient in answering our questions and took the time to…

Fan installation
ScottLocal Guide · 67 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. · 4 months ago★★★★★

Great lakes radon was finished with their professional install of a new sump pump and radon mitigation system in about an hour and twenty minutes. The service installers were fantastic and completed the job with a smile. I am very happy with the product. A definite "recommend" from me. If you have a sump pump…

Great priceGeneral constructionFan installation
MarsolLocal Guide · 154 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. · 5 months ago★★★★★

Great Lakes Radon members Dalton and Logan came early and finished in an appropriate time. They carefully installed the radon system and explained everything I needed along with answering my questions. I have a weird sump pump setup but they were able to work around it and to install the system in the room I felt…

Reasonable priceGeneral constructionFan installation
Jessica4 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. · 8 months ago★★★★★

Amazing efficient service and unbeatable pricing

Great priceFan installation
Craig6 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. · 8 months ago★★★★★

Crew was on time & we're professional. Both in appearance & workmanship. Wife said she wasn't afraid to let them in the house. lol

Fan installationBasement remodeling
Solomon8 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. · a year ago★★★★★

I bought a digital radon detector in July because my neighbor had detected radon in his house, Even though he had it checked a few years ago when he moved in. At first, my readings were low and then they were a constant red. I called Great Lakes Radon he set me up an appointment on September 16 2025. Their team…

Great priceFan installationService not listed

Price

Not enough reviews with a price yet.

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

Great price 40%Reasonable 57%Overpriced 0%Not sure 2%

Jobs customers hired them for

JobReviewsCategory typical
Fan installation7—
Installation5—
General construction4—

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